diff options
Diffstat (limited to 'drivers/pci/setup-irq.c')
| -rw-r--r-- | drivers/pci/setup-irq.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c deleted file mode 100644 index cc7d26b015..0000000000 --- a/drivers/pci/setup-irq.c +++ /dev/null @@ -1,64 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Support routines for initializing a PCI subsystem - * - * Extruded from code written by - * Dave Rusling (david.rusling@reo.mts.dec.com) - * David Mosberger (davidm@cs.arizona.edu) - * David Miller (davem@redhat.com) - */ - -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/cache.h> -#include "pci.h" - -void pci_assign_irq(struct pci_dev *dev) -{ - u8 pin; - u8 slot = -1; - int irq = 0; - struct pci_host_bridge *hbrg = pci_find_host_bridge(dev->bus); - - if (!(hbrg->map_irq)) { - pci_dbg(dev, "runtime IRQ mapping not provided by arch\n"); - return; - } - - /* - * If this device is not on the primary bus, we need to figure out - * which interrupt pin it will come in on. We know which slot it - * will come in on because that slot is where the bridge is. Each - * time the interrupt line passes through a PCI-PCI bridge we must - * apply the swizzle function. - */ - pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); - /* Cope with illegal. */ - if (pin > 4) - pin = 1; - - if (pin) { - /* Follow the chain of bridges, swizzling as we go. */ - if (hbrg->swizzle_irq) - slot = (*(hbrg->swizzle_irq))(dev, &pin); - - /* - * If a swizzling function is not used, map_irq() must - * ignore slot. - */ - irq = (*(hbrg->map_irq))(dev, slot, pin); - if (irq == -1) - irq = 0; - } - dev->irq = irq; - - pci_dbg(dev, "assign IRQ: got %d\n", dev->irq); - - /* - * Always tell the device, so the driver knows what is the real IRQ - * to use; the device does not use it. - */ - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); -} |