projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |