1 #include <linux/init.h>
4 /* PCI interrupt pins */
10 /* This table is filled in by interrogating the PIIX4 chip */
11 static char pci_irq[5] __initdata;
13 static char irq_tab[][5] __initdata = {
14 /* INTA INTB INTC INTD */
15 {0, 0, 0, 0, 0 }, /* 0: GT64120 PCI bridge */
16 {0, 0, 0, 0, 0 }, /* 1: Unused */
17 {0, 0, 0, 0, 0 }, /* 2: Unused */
18 {0, 0, 0, 0, 0 }, /* 3: Unused */
19 {0, 0, 0, 0, 0 }, /* 4: Unused */
20 {0, 0, 0, 0, 0 }, /* 5: Unused */
21 {0, 0, 0, 0, 0 }, /* 6: Unused */
22 {0, 0, 0, 0, 0 }, /* 7: Unused */
23 {0, 0, 0, 0, 0 }, /* 8: Unused */
24 {0, 0, 0, 0, 0 }, /* 9: Unused */
25 {0, 0, 0, 0, PCID }, /* 10: PIIX4 USB */
26 {0, PCIB, 0, 0, 0 }, /* 11: AMD 79C973 Ethernet */
27 {0, PCIC, 0, 0, 0 }, /* 12: Crystal 4281 Sound */
28 {0, 0, 0, 0, 0 }, /* 13: Unused */
29 {0, 0, 0, 0, 0 }, /* 14: Unused */
30 {0, 0, 0, 0, 0 }, /* 15: Unused */
31 {0, 0, 0, 0, 0 }, /* 16: Unused */
32 {0, 0, 0, 0, 0 }, /* 17: Bonito/SOC-it PCI Bridge*/
33 {0, PCIA, PCIB, PCIC, PCID }, /* 18: PCI Slot 1 */
34 {0, PCIB, PCIC, PCID, PCIA }, /* 19: PCI Slot 2 */
35 {0, PCIC, PCID, PCIA, PCIB }, /* 20: PCI Slot 3 */
36 {0, PCID, PCIA, PCIB, PCIC } /* 21: PCI Slot 4 */
39 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
42 virq = irq_tab[slot][pin];
46 void __init pcibios_fixup_irqs(void)
51 static void __init malta_piix_func0_fixup(struct pci_dev *pdev)
53 unsigned char reg_val;
54 static int piixirqmap[16] __initdata = { /* PIIX PIRQC[A:D] irq mappings */
62 /* Interrogate PIIX4 to get PCI IRQ mapping */
63 for (i = 0; i <= 3; i++) {
64 pci_read_config_byte(pdev, 0x60+i, ®_val);
66 pci_irq[PCIA+i] = 0; /* Disabled */
68 pci_irq[PCIA+i] = piixirqmap[reg_val & 15];
71 /* Done by YAMON 2.00 onwards */
72 if (PCI_SLOT(pdev->devfn) == 10) {
74 * Set top of main memory accessible by ISA or DMA
77 pci_read_config_byte(pdev, 0x69, ®_val);
78 pci_write_config_byte(pdev, 0x69, reg_val | 0xf0);
83 static void __init malta_piix_func1_fixup(struct pci_dev *pdev)
85 unsigned char reg_val;
87 /* Done by YAMON 2.02 onwards */
88 if (PCI_SLOT(pdev->devfn) == 10) {
92 pci_read_config_byte(pdev, 0x41, ®_val);
93 pci_write_config_byte(pdev, 0x41, reg_val|0x80);
94 pci_read_config_byte(pdev, 0x43, ®_val);
95 pci_write_config_byte(pdev, 0x43, reg_val|0x80);
99 struct pci_fixup pcibios_fixups[] __initdata = {
100 {PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
101 malta_piix_func0_fixup},
102 {PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
103 malta_piix_func1_fixup},