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* $Id: generic.c,v 1.6 2000/04/21 11:58:00 mj Exp $
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* The PCI Library -- Generic Direct Access Functions
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* Copyright (c) 1997--2000 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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* Can be freely distributed and used under the terms of the GNU GPL.
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pci_generic_scan_bus(struct pci_access *a, byte *busmap, int bus)
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struct pci_dev *t = pci_alloc_dev(a);
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a->debug("Scanning bus %02x for devices...\n", bus);
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a->warning("Bus %02x seen twice (firmware bug). Ignored.", bus);
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for(dev=0; dev<32; dev++)
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for(t->func=0; t->func<8; t->func++)
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u32 vd = pci_read_long(t, PCI_VENDOR_ID);
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if (!vd || vd == 0xffffffff)
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ht = pci_read_byte(t, PCI_HEADER_TYPE);
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d->vendor_id = vd & 0xffff;
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d->device_id = vd >> 16U;
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d->known_fields = PCI_FILL_IDENT;
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case PCI_HEADER_TYPE_NORMAL:
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case PCI_HEADER_TYPE_BRIDGE:
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case PCI_HEADER_TYPE_CARDBUS:
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pci_generic_scan_bus(a, busmap, pci_read_byte(t, PCI_SECONDARY_BUS));
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a->debug("Device %02x:%02x.%d has unknown header type %02x.\n", d->bus, d->dev, d->func, ht);
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pci_generic_scan(struct pci_access *a)
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bzero(busmap, sizeof(busmap));
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pci_generic_scan_bus(a, busmap, 0);
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pci_generic_fill_info(struct pci_dev *d, int flags)
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struct pci_access *a = d->access;
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if (flags & PCI_FILL_IDENT)
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d->vendor_id = pci_read_word(d, PCI_VENDOR_ID);
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d->device_id = pci_read_word(d, PCI_DEVICE_ID);
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if (flags & PCI_FILL_IRQ)
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d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE);
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if (flags & PCI_FILL_BASES)
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bzero(d->base_addr, sizeof(d->base_addr));
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case PCI_HEADER_TYPE_NORMAL:
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case PCI_HEADER_TYPE_BRIDGE:
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case PCI_HEADER_TYPE_CARDBUS:
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u16 cmd = pci_read_word(d, PCI_COMMAND);
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u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i*4);
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if (!x || x == (u32) ~0)
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if (x & PCI_BASE_ADDRESS_SPACE_IO)
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if (!a->buscentric && !(cmd & PCI_COMMAND_IO))
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else if (a->buscentric || (cmd & PCI_COMMAND_MEMORY))
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if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) == PCI_BASE_ADDRESS_MEM_TYPE_64)
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a->warning("%02x:%02x.%d: Invalid 64-bit address seen.", d->bus, d->dev, d->func);
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u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i)*4);
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#ifdef HAVE_64BIT_ADDRESS
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d->base_addr[i-1] |= ((pciaddr_t) y) << 32;
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a->warning("%02x:%02x.%d 64-bit device address ignored.", d->bus, d->dev, d->func);
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d->base_addr[i-1] = 0;
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if (flags & PCI_FILL_ROM_BASE)
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d->rom_base_addr = 0;
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case PCI_HEADER_TYPE_NORMAL:
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reg = PCI_ROM_ADDRESS;
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case PCI_HEADER_TYPE_BRIDGE:
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reg = PCI_ROM_ADDRESS1;
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u32 a = pci_read_long(d, reg);
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if (a & PCI_ROM_ADDRESS_ENABLE)
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d->rom_base_addr = a;
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return flags & ~PCI_FILL_SIZES;
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pci_generic_block_op(struct pci_dev *d, int pos, byte *buf, int len,
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int (*r)(struct pci_dev *d, int pos, byte *buf, int len))
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if ((pos & 1) && len >= 1)
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if (!r(d, pos, buf, 1))
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if ((pos & 3) && len >= 2)
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if (!r(d, pos, buf, 2))
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pos += 2; buf += 2; len -= 2;
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if (!r(d, pos, buf, 4))
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pos += 4; buf += 4; len -= 4;
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if (!r(d, pos, buf, 2))
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pos += 2; buf += 2; len -= 2;
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if (len && !r(d, pos, buf, 1))
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pci_generic_block_read(struct pci_dev *d, int pos, byte *buf, int len)
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return pci_generic_block_op(d, pos, buf, len, d->access->methods->read);
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pci_generic_block_write(struct pci_dev *d, int pos, byte *buf, int len)
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return pci_generic_block_op(d, pos, buf, len, d->access->methods->write);