1 /*
2 * linux/arch/arm/mach-footbridge/personal-pci.c
3 *
4 * PCI bios-type initialisation for PCI machines
5 *
6 * Bits taken from various places.
7 */
8 #include <linux/kernel.h>
9 #include <linux/pci.h>
10 #include <linux/init.h>
11
12 #include <asm/irq.h>
13 #include <asm/mach/pci.h>
14 #include <asm/mach-types.h>
15
16 static int irqmap_personal_server[] __initdata = {
17 IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
18 IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
19 };
20
personal_server_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)21 static int __init personal_server_map_irq(const struct pci_dev *dev, u8 slot,
22 u8 pin)
23 {
24 unsigned char line;
25
26 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
27
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
32 */
33 return irqmap_personal_server[(line & 0x1f) - 8];
34 } else if (line == 0) {
35 /* no interrupt */
36 return 0;
37 } else
38 return irqmap_personal_server[(line - 1) & 3];
39 }
40
41 static struct hw_pci personal_server_pci __initdata = {
42 .map_irq = personal_server_map_irq,
43 .nr_controllers = 1,
44 .ops = &dc21285_ops,
45 .setup = dc21285_setup,
46 .preinit = dc21285_preinit,
47 .postinit = dc21285_postinit,
48 };
49
personal_pci_init(void)50 static int __init personal_pci_init(void)
51 {
52 if (machine_is_personal_server())
53 pci_common_init(&personal_server_pci);
54 return 0;
55 }
56
57 subsys_initcall(personal_pci_init);
58