Commit 21f47fbc authored by Alexey Charkov's avatar Alexey Charkov Committed by Russell King
Browse files

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: default avatarAlexey Charkov <alchark@gmail.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 1bae4ce2

arch/arm/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -875,6 +875,16 @@ config PLAT_SPEAR 
	help

	  Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).



config ARCH_VT8500

	bool "VIA/WonderMedia 85xx"

	select CPU_ARM926T

	select GENERIC_GPIO

	select ARCH_HAS_CPUFREQ

	select GENERIC_CLOCKEVENTS

	select ARCH_REQUIRE_GPIOLIB

	select HAVE_PWM

	help

	  Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.

endchoice



#
@@ -1007,6 +1017,8 @@ source "arch/arm/mach-versatile/Kconfig" 


source "arch/arm/mach-vexpress/Kconfig"



source "arch/arm/mach-vt8500/Kconfig"



source "arch/arm/mach-w90x900/Kconfig"



# Definitions to make life easier

arch/arm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -190,6 +190,7 @@ machine-$(CONFIG_ARCH_U300) := u300 
machine-$(CONFIG_ARCH_U8500)		:= ux500

machine-$(CONFIG_ARCH_VERSATILE)	:= versatile

machine-$(CONFIG_ARCH_VEXPRESS)		:= vexpress

machine-$(CONFIG_ARCH_VT8500)		:= vt8500

machine-$(CONFIG_ARCH_W90X900)		:= w90x900

machine-$(CONFIG_ARCH_NUC93X)		:= nuc93x

machine-$(CONFIG_FOOTBRIDGE)		:= footbridge

arch/arm/boot/compressed/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/boot/compressed/head-vt8500.S

0 → 100644
+46 −0
Original line number Diff line number Diff line 
/*

 * 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:

arch/arm/mach-vt8500/Kconfig

0 → 100644
+73 −0
Original line number Diff line number Diff line 
if ARCH_VT8500



config VTWM_VERSION_VT8500

	bool



config VTWM_VERSION_WM8505

	bool



config MACH_BV07

	bool "Benign BV07-8500 Mini Netbook"

	depends on ARCH_VT8500

	select VTWM_VERSION_VT8500

	help

	  Add support for the inexpensive 7-inch netbooks sold by many

	  Chinese distributors under various names. Note that there are

	  many hardware implementations in identical exterior, make sure

	  that yours is indeed based on a VIA VT8500 chip.



config MACH_WM8505_7IN_NETBOOK

	bool "WM8505 7-inch generic netbook"

	depends on ARCH_VT8500

	select VTWM_VERSION_WM8505

	help

	  Add support for the inexpensive 7-inch netbooks sold by many

	  Chinese distributors under various names. Note that there are

	  many hardware implementations in identical exterior, make sure

	  that yours is indeed based on a WonderMedia WM8505 chip.



comment "LCD panel size"



config WMT_PANEL_800X480

	bool "7-inch with 800x480 resolution"

	depends on (FB_VT8500 || FB_WM8505)

	default y

	help

	  These are found in most of the netbooks in generic cases, as

	  well as in Eken M001 tablets and possibly elsewhere.



	  To select this panel at runtime, say y here and append

	  'panel=800x480' to your kernel command line. Otherwise, the

	  largest one available will be used.



config WMT_PANEL_800X600

	bool "8-inch with 800x600 resolution"

	depends on (FB_VT8500 || FB_WM8505)

	help

	  These are found in Eken M003 tablets and possibly elsewhere.



	  To select this panel at runtime, say y here and append

	  'panel=800x600' to your kernel command line. Otherwise, the

	  largest one available will be used.



config WMT_PANEL_1024X576

	bool "10-inch with 1024x576 resolution"

	depends on (FB_VT8500 || FB_WM8505)

	help

	  These are found in CherryPal netbooks and possibly elsewhere.



	  To select this panel at runtime, say y here and append

	  'panel=1024x576' to your kernel command line. Otherwise, the

	  largest one available will be used.



config WMT_PANEL_1024X600

	bool "10-inch with 1024x600 resolution"

	depends on (FB_VT8500 || FB_WM8505)

	help

	  These are found in Eken M006 tablets and possibly elsewhere.



	  To select this panel at runtime, say y here and append

	  'panel=1024x600' to your kernel command line. Otherwise, the

	  largest one available will be used.



endif

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