diff options
Diffstat (limited to 'arch/mips/lib/iomap-pci.c')
| -rw-r--r-- | arch/mips/lib/iomap-pci.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/lib/iomap-pci.c b/arch/mips/lib/iomap-pci.c new file mode 100644 index 000000000..210f5a95e --- /dev/null +++ b/arch/mips/lib/iomap-pci.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Implement the default iomap interfaces + * + * (C) Copyright 2004 Linus Torvalds + * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org> + * (C) Copyright 2007 MIPS Technologies, Inc. + * written by Ralf Baechle <ralf@linux-mips.org> + */ +#include <linux/pci.h> +#include <linux/export.h> +#include <asm/io.h> + +#ifdef CONFIG_PCI_DRIVERS_LEGACY + +void __iomem *__pci_ioport_map(struct pci_dev *dev, + unsigned long port, unsigned int nr) +{ + struct pci_controller *ctrl = dev->bus->sysdata; + unsigned long base = ctrl->io_map_base; + + /* This will eventually become a BUG_ON but for now be gentle */ + if (unlikely(!ctrl->io_map_base)) { + struct pci_bus *bus = dev->bus; + char name[8]; + + while (bus->parent) + bus = bus->parent; + + ctrl->io_map_base = base = mips_io_port_base; + + sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); + printk(KERN_WARNING "io_map_base of root PCI bus %s unset. " + "Trying to continue but you better\nfix this issue or " + "report it to linux-mips@linux-mips.org or your " + "vendor.\n", name); +#ifdef CONFIG_PCI_DOMAINS + panic("To avoid data corruption io_map_base MUST be set with " + "multiple PCI domains."); +#endif + } + + return (void __iomem *) (ctrl->io_map_base + port); +} + +#endif /* CONFIG_PCI_DRIVERS_LEGACY */ |