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x86, geode: add a VSA2 ID for General Software

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General Software writes their own VSA2 module for their version
of the Geode BIOS, which returns a different ID then the standard
VSA2.  This was causing the framebuffer driver to break for most
GSW boards.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Cc: tglx@linutronix.de
Cc: linux-geode@lists.infradead.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jordan Crouse 2008-06-18 11:34:38 -06:00 committed by Ingo Molnar
parent d3942cff62
commit ffe6e1da86
2 changed files with 6 additions and 3 deletions
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5
arch/x86/kernel/geode_32.c
View file

@ -166,6 +166,8 @@ int geode_has_vsa2(void)
static int has_vsa2 = -1;
if (has_vsa2 == -1) {
u16 val;
/*
* The VSA has virtual registers that we can query for a
* signature.
@ -173,7 +175,8 @@ int geode_has_vsa2(void)
outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
has_vsa2 = (inw(VSA_VRC_DATA) == VSA_SIG);
val = inw(VSA_VRC_DATA);
has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG);
}
return has_vsa2;

4
include/asm-x86/geode.h
View file

@ -112,8 +112,8 @@ extern int geode_get_dev_base(unsigned int dev);
#define VSA_VR_UNLOCK 0xFC53 /* unlock virtual register */
#define VSA_VR_SIGNATURE 0x0003
#define VSA_VR_MEM_SIZE 0x0200
#define VSA_SIG 0x4132 /* signature is ascii 'VSA2' */
#define AMD_VSA_SIG 0x4132 /* signature is ascii 'VSA2' */
#define GSW_VSA_SIG 0x534d /* General Software signature */
/* GPIO */
#define GPIO_OUTPUT_VAL 0x00