diff options
| author | Henrik Brix Andersen <brix@gentoo.org> | 2005-03-07 17:39:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-03-07 17:39:00 -0800 |
| commit | dccafd6e87b700ca429461c62466de2e1e9183d3 (patch) | |
| tree | c94487e8ece5bef18fe1a9f85d6513528f2b2c9d /include/linux/scx200.h | |
| parent | 54fe2b5bfa8887f57cfff32c81d124b56d9de3ac (diff) | |
[PATCH] Determine SCx200 CB address at run-time
The current SCx200 drivers use a fixed base address of 0x9000 for the
Configuration Block, but some systems (at least the Soekris net4801) uses a
base address of 0x6000. This patch first tries the fixed address then - if
no configuration block could be found - tries the address written to the
Configuration Block Address Scratchpad register by the BIOS.
Signed-off-by: Henrik Brix Andersen <brix@gentoo.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/scx200.h')
| -rw-r--r-- | include/linux/scx200.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/scx200.h b/include/linux/scx200.h index af7d53acad99..a22f9e173ad2 100644 --- a/include/linux/scx200.h +++ b/include/linux/scx200.h @@ -7,6 +7,10 @@ /* Interesting stuff for the National Semiconductor SCx200 CPU */ +extern unsigned scx200_cb_base; + +#define scx200_cb_present() (scx200_cb_base!=0) + /* F0 PCI Header/Bridge Configuration Registers */ #define SCx200_DOCCS_BASE 0x78 /* DOCCS Base Address Register */ #define SCx200_DOCCS_CTRL 0x7c /* DOCCS Control Register */ @@ -15,7 +19,7 @@ #define SCx200_GPIO_SIZE 0x2c /* Size of GPIO register block */ /* General Configuration Block */ -#define SCx200_CB_BASE 0x9000 /* Base fixed at 0x9000 according to errata */ +#define SCx200_CB_BASE_FIXED 0x9000 /* Base fixed at 0x9000 according to errata? */ /* Watchdog Timer */ #define SCx200_WDT_OFFSET 0x00 /* offset within configuration block */ @@ -44,9 +48,7 @@ #define SCx200_IID 0x3c /* IA On a Chip Identification Number Reg */ #define SCx200_REV 0x3d /* Revision Register */ #define SCx200_CBA 0x3e /* Configuration Base Address Register */ - -/* Verify that the configuration block really is there */ -#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base)) +#define SCx200_CBA_SCRATCH 0x64 /* Configuration Base Address Scratchpad */ /* Local variables: |