1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/arch/arm/mach-footbridge/ebsa285-pci.c
4  *
5  * PCI bios-type initialisation for PCI machines
6  *
7  * Bits taken from various places.
8  */
9 #include <linux/kernel.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
12 
13 #include <asm/irq.h>
14 #include <asm/mach/pci.h>
15 #include <asm/mach-types.h>
16 
17 static int irqmap_ebsa285[] = { IRQ_IN3, IRQ_IN1, IRQ_IN0, IRQ_PCI };
18 
19 static int ebsa285_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
20 {
21 	if (dev->vendor == PCI_VENDOR_ID_CONTAQ &&
22 	    dev->device == PCI_DEVICE_ID_CONTAQ_82C693)
23 		switch (PCI_FUNC(dev->devfn)) {
24 		case 1:	return 14;
25 		case 2:	return 15;
26 		case 3:	return 12;
27 		}
28 
29 	return irqmap_ebsa285[(slot + pin) & 3];
30 }
31 
32 static struct hw_pci ebsa285_pci __initdata = {
33 	.map_irq		= ebsa285_map_irq,
34 	.nr_controllers		= 1,
35 	.ops			= &dc21285_ops,
36 	.setup			= dc21285_setup,
37 	.preinit		= dc21285_preinit,
38 	.postinit		= dc21285_postinit,
39 };
40 
41 static int __init ebsa285_init_pci(void)
42 {
43 	if (machine_is_ebsa285())
44 		pci_common_init(&ebsa285_pci);
45 	return 0;
46 }
47 
48 subsys_initcall(ebsa285_init_pci);
49