diff options
Diffstat (limited to 'arch/mips/pci/fixup-rbtx4938.c')
| -rw-r--r-- | arch/mips/pci/fixup-rbtx4938.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/mips/pci/fixup-rbtx4938.c b/arch/mips/pci/fixup-rbtx4938.c new file mode 100644 index 000000000000..a80579af609b --- /dev/null +++ b/arch/mips/pci/fixup-rbtx4938.c @@ -0,0 +1,53 @@ +/* + * Toshiba rbtx4938 pci routines + * Copyright (C) 2000-2001 Toshiba Corporation + * + * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the + * terms of the GNU General Public License version 2. This program is + * licensed "as is" without any warranty of any kind, whether express + * or implied. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ +#include <linux/types.h> +#include <asm/txx9/pci.h> +#include <asm/txx9/rbtx4938.h> + +int __init rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + int irq = tx4938_pcic1_map_irq(dev, slot); + + if (irq >= 0) + return irq; + irq = pin; + /* IRQ rotation */ + irq--; /* 0-3 */ + if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { + /* PCI CardSlot (IDSEL=A23) */ + /* PCIA => PCIA (IDSEL=A23) */ + irq = (irq + 0 + slot) % 4; + } else { + /* PCI Backplane */ + if (txx9_pci_option & TXX9_PCI_OPT_PICMG) + irq = (irq + 33 - slot) % 4; + else + irq = (irq + 3 + slot) % 4; + } + irq++; /* 1-4 */ + + switch (irq) { + case 1: + irq = RBTX4938_IRQ_IOC_PCIA; + break; + case 2: + irq = RBTX4938_IRQ_IOC_PCIB; + break; + case 3: + irq = RBTX4938_IRQ_IOC_PCIC; + break; + case 4: + irq = RBTX4938_IRQ_IOC_PCID; + break; + } + return irq; +} |