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
21 static int __init personal_server_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
22 {
23 unsigned char line;
24
25 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
26
27 if (line > 0x40 && line <= 0x5f) {
28 /* line corresponds to the bit controlling this interrupt
29 * in the footbridge. Ignore the first 8 interrupt bits,
30 * look up the rest in the map. IN0 is bit number 8
31 */
32 return irqmap_personal_server[(line & 0x1f) - 8];
33 } else if (line == 0) {
34 /* no interrupt */
35 return 0;
36 } else
37 return irqmap_personal_server[(line - 1) & 3];
38 }
39
40 static struct hw_pci personal_server_pci __initdata = {
41 .map_irq = personal_server_map_irq,
42 .nr_controllers = 1,
43 .setup = dc21285_setup,
44 .scan = dc21285_scan_bus,
45 .preinit = dc21285_preinit,
46 .postinit = dc21285_postinit,
47 };
48
49 static int __init personal_pci_init(void)
50 {
51 if (machine_is_personal_server())
52 pci_common_init(&personal_server_pci);
53 return 0;
54 }
55
56 subsys_initcall(personal_pci_init);
57
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