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6
7#include <linux/kernel.h>
8#include <linux/pci.h>
9#include <linux/init.h>
10
11#include <asm/setup.h>
12#include <asm/pci_x86.h>
13#include <asm/visws/cobalt.h>
14#include <asm/visws/lithium.h>
15
16static int pci_visws_enable_irq(struct pci_dev *dev) { return 0; }
17static void pci_visws_disable_irq(struct pci_dev *dev) { }
18
19
20
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22
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24
25unsigned int pci_bus0, pci_bus1;
26
27static int __init visws_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
28{
29 int irq, bus = dev->bus->number;
30
31 pin--;
32
33
34 if (bus == pci_bus0 && slot == 4 && pin == 0)
35 return -1;
36
37
38 if (bus == pci_bus0 && slot == 4 && pin == 3) {
39 irq = CO_IRQ(CO_APIC_PIIX4_USB);
40 goto out;
41 }
42
43
44 if (pin == 0) {
45 irq = CO_IRQ((bus == pci_bus0 ? CO_APIC_PCIB_BASE0 :
46 CO_APIC_PCIA_BASE0) + slot);
47 goto out;
48 }
49
50
51 if (bus == pci_bus1) {
52
53 irq = CO_IRQ(CO_APIC_PCIA_BASE123 + ((slot + (pin - 1)) % 2));
54 } else {
55
56 if (slot == 0)
57 slot = 3;
58 irq = CO_IRQ(CO_APIC_PCIA_BASE123 + ((3 - slot) + (pin - 1) % 3));
59 }
60out:
61 printk(KERN_DEBUG "PCI: Bus %d Slot %d Line %d -> IRQ %d\n", bus, slot, pin, irq);
62 return irq;
63}
64
65int __init pci_visws_init(void)
66{
67 pcibios_enable_irq = &pci_visws_enable_irq;
68 pcibios_disable_irq = &pci_visws_disable_irq;
69
70
71 pci_probe = (pci_probe | PCI_PROBE_CONF1) &
72 ~(PCI_PROBE_BIOS | PCI_PROBE_CONF2);
73
74 pci_bus0 = li_pcib_read16(LI_PCI_BUSNUM) & 0xff;
75 pci_bus1 = li_pcia_read16(LI_PCI_BUSNUM) & 0xff;
76
77 printk(KERN_INFO "PCI: Lithium bridge A bus: %u, "
78 "bridge B (PIIX4) bus: %u\n", pci_bus1, pci_bus0);
79
80 raw_pci_ops = &pci_direct_conf1;
81 pci_scan_bus_with_sysdata(pci_bus0);
82 pci_scan_bus_with_sysdata(pci_bus1);
83 pci_fixup_irqs(pci_common_swizzle, visws_map_irq);
84 pcibios_resource_survey();
85
86 return 1;
87}
88