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1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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2 | /* |
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3 | * Copyright (C) NEC Electronics Corporation 2004-2006 |
4 | * |
5 | * This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c |
6 | * |
7 | * Copyright 2001 MontaVista Software Inc. |
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8 | */ |
9 | |
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10 | #include <linux/kernel.h> |
11 | #include <linux/init.h> |
12 | #include <linux/types.h> |
13 | #include <linux/pci.h> |
14 | |
15 | #include <asm/bootinfo.h> |
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16 | |
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17 | #include <asm/emma/emma2rh.h> |
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18 | |
19 | #define EMMA2RH_PCI_HOST_SLOT 0x09 |
20 | #define EMMA2RH_USB_SLOT 0x03 |
21 | #define PCI_DEVICE_ID_NEC_EMMA2RH 0x014b /* EMMA2RH PCI Host */ |
22 | |
23 | /* |
24 | * we fix up irqs based on the slot number. |
25 | * The first entry is at AD:11. |
26 | * Fortunately this works because, although we have two pci buses, |
27 | * they all have different slot numbers (except for rockhopper slot 20 |
28 | * which is handled below). |
29 | * |
30 | */ |
31 | |
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32 | #define MAX_SLOT_NUM 10 |
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33 | static unsigned char irq_map[][5] = { |
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34 | [3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC, |
35 | MARKEINS_PCI_IRQ_INTD, 0,}, |
36 | [4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,}, |
37 | [5] = {0, 0, 0, 0, 0,}, |
38 | [6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD, |
39 | MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,}, |
40 | }; |
41 | |
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42 | static void nec_usb_controller_fixup(struct pci_dev *dev) |
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43 | { |
44 | if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT) |
45 | /* on board USB controller configuration */ |
46 | pci_write_config_dword(dev, 0xe4, 1 << 5); |
47 | } |
48 | |
49 | DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, |
50 | nec_usb_controller_fixup); |
51 | |
52 | /* |
53 | * Prevent the PCI layer from seeing the resources allocated to this device |
54 | * if it is the host bridge by marking it as such. These resources are of |
55 | * no consequence to the PCI layer (they are handled elsewhere). |
56 | */ |
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57 | static void emma2rh_pci_host_fixup(struct pci_dev *dev) |
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58 | { |
59 | int i; |
60 | |
61 | if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) { |
62 | dev->class &= 0xff; |
63 | dev->class |= PCI_CLASS_BRIDGE_HOST << 8; |
64 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
65 | dev->resource[i].start = 0; |
66 | dev->resource[i].end = 0; |
67 | dev->resource[i].flags = 0; |
68 | } |
69 | } |
70 | } |
71 | |
72 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH, |
73 | emma2rh_pci_host_fixup); |
74 | |
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75 | int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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76 | { |
77 | return irq_map[slot][pin]; |
78 | } |
79 | |
80 | /* Do platform specific device initialization at pci_enable_device() time */ |
81 | int pcibios_plat_dev_init(struct pci_dev *dev) |
82 | { |
83 | return 0; |
84 | } |