1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/arm/mach-footbridge/personal-pci.c
5 * PCI bios-type initialisation for PCI machines
7 * Bits taken from various places.
9 #include <linux/kernel.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
14 #include <asm/mach/pci.h>
15 #include <asm/mach-types.h>
17 static int irqmap_personal_server[] = {
18 IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
19 IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
22 static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
26 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
28 if (line > 0x40 && line <= 0x5f) {
29 /* line corresponds to the bit controlling this interrupt
30 * in the footbridge. Ignore the first 8 interrupt bits,
31 * look up the rest in the map. IN0 is bit number 8
33 return irqmap_personal_server[(line & 0x1f) - 8];
34 } else if (line == 0) {
38 return irqmap_personal_server[(line - 1) & 3];
41 static struct hw_pci personal_server_pci __initdata = {
42 .map_irq = personal_server_map_irq,
45 .setup = dc21285_setup,
46 .preinit = dc21285_preinit,
47 .postinit = dc21285_postinit,
50 static int __init personal_pci_init(void)
52 if (machine_is_personal_server())
53 pci_common_init(&personal_server_pci);
57 subsys_initcall(personal_pci_init);