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Subject[PATCH] FRV: Enable the MB86943 PCI arbiter correctly
Date
From: David Howells <dhowells@redhat.com>

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>
---

arch/frv/mb93090-mb00/pci-vdk.c | 3 ++-
include/asm-frv/mb86943a.h | 3 +++
2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c
index 0b581e3..6d51f13 100644
--- a/arch/frv/mb93090-mb00/pci-vdk.c
+++ b/arch/frv/mb93090-mb00/pci-vdk.c
@@ -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;
diff --git a/include/asm-frv/mb86943a.h b/include/asm-frv/mb86943a.h
index b89fd0b..e87ef92 100644
--- a/include/asm-frv/mb86943a.h
+++ b/include/asm-frv/mb86943a.h
@@ -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 */
-
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