diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/configs/enp2611_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/ixdp2400_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/ixdp2401_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/ixdp2800_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/ixdp2801_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-ixp2000/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arm/mach-ixp2000/pci.c | 13 |
7 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/configs/enp2611_defconfig b/arch/arm/configs/enp2611_defconfig index af215342456..b8c51ee7f1b 100644 --- a/arch/arm/configs/enp2611_defconfig +++ b/arch/arm/configs/enp2611_defconfig @@ -99,6 +99,7 @@ CONFIG_ARCH_ENP2611=y # CONFIG_ARCH_IXDP2800 is not set # CONFIG_ARCH_IXDP2401 is not set # CONFIG_ARCH_IXDP2801 is not set +# CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO is not set # # Processor Type diff --git a/arch/arm/configs/ixdp2400_defconfig b/arch/arm/configs/ixdp2400_defconfig index a7ee1a442f3..3cfbe2ec29c 100644 --- a/arch/arm/configs/ixdp2400_defconfig +++ b/arch/arm/configs/ixdp2400_defconfig @@ -100,6 +100,7 @@ CONFIG_ARCH_IXDP2400=y CONFIG_ARCH_IXDP2X00=y # CONFIG_ARCH_IXDP2401 is not set # CONFIG_ARCH_IXDP2801 is not set +# CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO is not set # # Processor Type diff --git a/arch/arm/configs/ixdp2401_defconfig b/arch/arm/configs/ixdp2401_defconfig index 2da48fca5c1..5c87e8e6969 100644 --- a/arch/arm/configs/ixdp2401_defconfig +++ b/arch/arm/configs/ixdp2401_defconfig @@ -100,6 +100,7 @@ CONFIG_ARCH_SUPPORTS_BIG_ENDIAN=y CONFIG_ARCH_IXDP2401=y # CONFIG_ARCH_IXDP2801 is not set CONFIG_ARCH_IXDP2X01=y +# CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO is not set # # Processor Type diff --git a/arch/arm/configs/ixdp2800_defconfig b/arch/arm/configs/ixdp2800_defconfig index 7ba867f751f..3cb561a551c 100644 --- a/arch/arm/configs/ixdp2800_defconfig +++ b/arch/arm/configs/ixdp2800_defconfig @@ -100,6 +100,7 @@ CONFIG_ARCH_IXDP2800=y CONFIG_ARCH_IXDP2X00=y # CONFIG_ARCH_IXDP2401 is not set # CONFIG_ARCH_IXDP2801 is not set +# CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO is not set # # Processor Type diff --git a/arch/arm/configs/ixdp2801_defconfig b/arch/arm/configs/ixdp2801_defconfig index c4df0ec34b0..b1e162f29cb 100644 --- a/arch/arm/configs/ixdp2801_defconfig +++ b/arch/arm/configs/ixdp2801_defconfig @@ -100,6 +100,7 @@ CONFIG_ARCH_SUPPORTS_BIG_ENDIAN=y # CONFIG_ARCH_IXDP2401 is not set CONFIG_ARCH_IXDP2801=y CONFIG_ARCH_IXDP2X01=y +# CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO is not set # # Processor Type diff --git a/arch/arm/mach-ixp2000/Kconfig b/arch/arm/mach-ixp2000/Kconfig index 9361e05f6fa..ecb58d83478 100644 --- a/arch/arm/mach-ixp2000/Kconfig +++ b/arch/arm/mach-ixp2000/Kconfig @@ -54,6 +54,14 @@ config ARCH_IXDP2X01 depends on ARCH_IXDP2401 || ARCH_IXDP2801 default y +config IXP2000_SUPPORT_BROKEN_PCI_IO + bool "Support broken PCI I/O on older IXP2000s" + default y + help + Say 'N' here if you only intend to run your kernel on an + IXP2000 B0 or later model and do not need the PCI I/O + byteswap workaround. Say 'Y' otherwise. + endmenu endif diff --git a/arch/arm/mach-ixp2000/pci.c b/arch/arm/mach-ixp2000/pci.c index 5ff2f2718c5..0788fb2b5c1 100644 --- a/arch/arm/mach-ixp2000/pci.c +++ b/arch/arm/mach-ixp2000/pci.c @@ -198,6 +198,19 @@ clear_master_aborts(void) void __init ixp2000_pci_preinit(void) { +#ifndef CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO + /* + * Configure the PCI unit to properly byteswap I/O transactions, + * and verify that it worked. + */ + ixp2000_reg_write(IXP2000_PCI_CONTROL, + (*IXP2000_PCI_CONTROL | PCI_CONTROL_IEE)); + + if ((*IXP2000_PCI_CONTROL & PCI_CONTROL_IEE) == 0) + panic("IXP2000: PCI I/O is broken on this ixp model, and " + "the needed workaround has not been configured in"); +#endif + hook_fault_code(16+6, ixp2000_pci_abort_handler, SIGBUS, "PCI config cycle to non-existent device"); } |