1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/arch/arm/mach-footbridge/netwinder-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 /*
18  * We now use the slot ID instead of the device identifiers to select
19  * which interrupt is routed where.
20  */
21 static int netwinder_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
22 {
23 	switch (slot) {
24 	case 0:  /* host bridge */
25 		return 0;
26 
27 	case 9:  /* CyberPro */
28 		return IRQ_NETWINDER_VGA;
29 
30 	case 10: /* DC21143 */
31 		return IRQ_NETWINDER_ETHER100;
32 
33 	case 12: /* Winbond 553 */
34 		return IRQ_ISA_HARDDISK1;
35 
36 	case 13: /* Winbond 89C940F */
37 		return IRQ_NETWINDER_ETHER10;
38 
39 	default:
40 		printk(KERN_ERR "PCI: unknown device in slot %s\n",
41 			pci_name(dev));
42 		return 0;
43 	}
44 }
45 
46 static struct hw_pci netwinder_pci __initdata = {
47 	.map_irq		= netwinder_map_irq,
48 	.nr_controllers		= 1,
49 	.ops			= &dc21285_ops,
50 	.setup			= dc21285_setup,
51 	.preinit		= dc21285_preinit,
52 	.postinit		= dc21285_postinit,
53 };
54 
55 static int __init netwinder_pci_init(void)
56 {
57 	if (machine_is_netwinder())
58 		pci_common_init(&netwinder_pci);
59 	return 0;
60 }
61 
62 subsys_initcall(netwinder_pci_init);
63