1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Implement the default iomap interfaces 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * (C) Copyright 2004 Linus Torvalds 6*4882a593Smuzhiyun * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org> 7*4882a593Smuzhiyun * (C) Copyright 2007 MIPS Technologies, Inc. 8*4882a593Smuzhiyun * written by Ralf Baechle <ralf@linux-mips.org> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #include <linux/pci.h> 11*4882a593Smuzhiyun #include <linux/export.h> 12*4882a593Smuzhiyun #include <asm/io.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #ifdef CONFIG_PCI_DRIVERS_LEGACY 15*4882a593Smuzhiyun __pci_ioport_map(struct pci_dev * dev,unsigned long port,unsigned int nr)16*4882a593Smuzhiyunvoid __iomem *__pci_ioport_map(struct pci_dev *dev, 17*4882a593Smuzhiyun unsigned long port, unsigned int nr) 18*4882a593Smuzhiyun { 19*4882a593Smuzhiyun struct pci_controller *ctrl = dev->bus->sysdata; 20*4882a593Smuzhiyun unsigned long base = ctrl->io_map_base; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* This will eventually become a BUG_ON but for now be gentle */ 23*4882a593Smuzhiyun if (unlikely(!ctrl->io_map_base)) { 24*4882a593Smuzhiyun struct pci_bus *bus = dev->bus; 25*4882a593Smuzhiyun char name[8]; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun while (bus->parent) 28*4882a593Smuzhiyun bus = bus->parent; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun ctrl->io_map_base = base = mips_io_port_base; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); 33*4882a593Smuzhiyun printk(KERN_WARNING "io_map_base of root PCI bus %s unset. " 34*4882a593Smuzhiyun "Trying to continue but you better\nfix this issue or " 35*4882a593Smuzhiyun "report it to linux-mips@linux-mips.org or your " 36*4882a593Smuzhiyun "vendor.\n", name); 37*4882a593Smuzhiyun #ifdef CONFIG_PCI_DOMAINS 38*4882a593Smuzhiyun panic("To avoid data corruption io_map_base MUST be set with " 39*4882a593Smuzhiyun "multiple PCI domains."); 40*4882a593Smuzhiyun #endif 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun return (void __iomem *) (ctrl->io_map_base + port); 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #endif /* CONFIG_PCI_DRIVERS_LEGACY */ 47