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FRV: Enable the MB86943 PCI arbiter correctly

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Enable the MB93090 motherboard's MB86943 PCI arbiter correctly by assigning to
the register rather than comparing against it.  This is required to support
bus mastering.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2007-08-01 19:04:51 +01:00 committed by Linus Torvalds
parent b562548183
commit 04668873da
2 changed files with 5 additions and 1 deletions
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3
arch/frv/mb93090-mb00/pci-vdk.c
View file

@ -400,7 +400,8 @@ int __init pcibios_init(void)
__reg_MB86943_pci_sl_mem_base = __region_CS2 + 0x08000000;
mb();
*(volatile unsigned long *)(__region_CS2+0x01300014) == 1;
/* enable PCI arbitration */
__reg_MB86943_pci_arbiter = MB86943_PCIARB_EN;
ioport_resource.start = (__reg_MB86943_sl_pci_io_base << 9) & 0xfffffc00;
ioport_resource.end = (__reg_MB86943_sl_pci_io_range << 9) | 0x3ff;

3
include/asm-frv/mb86943a.h
View file

@ -36,4 +36,7 @@
#define __reg_MB86943_pci_sl_io_base *(volatile uint32_t *) (__region_CS1 + 0x70)
#define __reg_MB86943_pci_sl_mem_base *(volatile uint32_t *) (__region_CS1 + 0x78)
#define __reg_MB86943_pci_arbiter *(volatile uint32_t *) (__region_CS2 + 0x01300014)
#define MB86943_PCIARB_EN 0x00000001
#endif /* _ASM_MB86943A_H */