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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
51533b61 MS |
2 | #include <linux/pci.h> |
3 | #include <linux/kernel.h> | |
d6094ced | 4 | #include <hwregs/intr_vect.h> |
51533b61 | 5 | |
51533b61 MS |
6 | void pcibios_set_master(struct pci_dev *dev) |
7 | { | |
8 | u8 lat; | |
9 | pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat); | |
10 | printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat); | |
11 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat); | |
12 | } | |
13 | ||
b26b2d49 | 14 | resource_size_t |
3b7a17fc | 15 | pcibios_align_resource(void *data, const struct resource *res, |
e31dd6e4 | 16 | resource_size_t size, resource_size_t align) |
51533b61 | 17 | { |
b26b2d49 | 18 | resource_size_t start = res->start; |
51533b61 | 19 | |
b26b2d49 DB |
20 | if ((res->flags & IORESOURCE_IO) && (start & 0x300)) |
21 | start = (start + 0x3ff) & ~0x3ff; | |
22 | ||
f7454c5d | 23 | return start; |
51533b61 MS |
24 | } |
25 | ||
26 | int pcibios_enable_resources(struct pci_dev *dev, int mask) | |
27 | { | |
28 | u16 cmd, old_cmd; | |
29 | int idx; | |
30 | struct resource *r; | |
31 | ||
32 | pci_read_config_word(dev, PCI_COMMAND, &cmd); | |
33 | old_cmd = cmd; | |
34 | for(idx=0; idx<6; idx++) { | |
35 | /* Only set up the requested stuff */ | |
36 | if (!(mask & (1<<idx))) | |
37 | continue; | |
38 | ||
39 | r = &dev->resource[idx]; | |
40 | if (!r->start && r->end) { | |
41 | printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev)); | |
42 | return -EINVAL; | |
43 | } | |
44 | if (r->flags & IORESOURCE_IO) | |
45 | cmd |= PCI_COMMAND_IO; | |
46 | if (r->flags & IORESOURCE_MEM) | |
47 | cmd |= PCI_COMMAND_MEMORY; | |
48 | } | |
49 | if (dev->resource[PCI_ROM_RESOURCE].start) | |
50 | cmd |= PCI_COMMAND_MEMORY; | |
51 | if (cmd != old_cmd) { | |
52 | printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd); | |
53 | pci_write_config_word(dev, PCI_COMMAND, cmd); | |
54 | } | |
55 | return 0; | |
56 | } | |
57 | ||
58 | int pcibios_enable_irq(struct pci_dev *dev) | |
59 | { | |
60 | dev->irq = EXT_INTR_VECT; | |
61 | return 0; | |
62 | } | |
63 | ||
64 | int pcibios_enable_device(struct pci_dev *dev, int mask) | |
65 | { | |
66 | int err; | |
67 | ||
68 | if ((err = pcibios_enable_resources(dev, mask)) < 0) | |
69 | return err; | |
70 | ||
bba6f6fc EB |
71 | if (!dev->msi_enabled) |
72 | pcibios_enable_irq(dev); | |
73 | return 0; | |
51533b61 | 74 | } |