| 0,0 → 1,206 |
|---|
| /* |
| * The PCI Library -- Generic Direct Access Functions |
| * |
| * Copyright (c) 1997--2000 Martin Mares <mj@ucw.cz> |
| * |
| * May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar. |
| * |
| * Can be freely distributed and used under the terms of the GNU GPL. |
| */ |
| |
| #include <string.h> |
| |
| #include "internal.h" |
| |
| void pci_generic_scan_bus(struct pci_access *a, byte * busmap, int bus) |
| { |
| int dev, multi, ht; |
| struct pci_dev *t; |
| |
| a->debug("Scanning bus %02x for devices...\n", bus); |
| if (busmap[bus]) { |
| a->warning("Bus %02x seen twice (firmware bug). Ignored.", |
| bus); |
| return; |
| } |
| busmap[bus] = 1; |
| t = pci_alloc_dev(a); |
| t->bus = bus; |
| for (dev = 0; dev < 32; dev++) { |
| t->dev = dev; |
| multi = 0; |
| for (t->func = 0; !t->func || multi && t->func < 8; |
| t->func++) { |
| u32 vd = pci_read_long(t, PCI_VENDOR_ID); |
| struct pci_dev *d; |
| |
| if (!vd || vd == 0xffffffff) |
| continue; |
| ht = pci_read_byte(t, PCI_HEADER_TYPE); |
| if (!t->func) |
| multi = ht & 0x80; |
| ht &= 0x7f; |
| d = pci_alloc_dev(a); |
| d->bus = t->bus; |
| d->dev = t->dev; |
| d->func = t->func; |
| d->vendor_id = vd & 0xffff; |
| d->device_id = vd >> 16U; |
| d->known_fields = PCI_FILL_IDENT; |
| d->hdrtype = ht; |
| pci_link_dev(a, d); |
| switch (ht) { |
| case PCI_HEADER_TYPE_NORMAL: |
| break; |
| case PCI_HEADER_TYPE_BRIDGE: |
| case PCI_HEADER_TYPE_CARDBUS: |
| pci_generic_scan_bus(a, busmap, |
| pci_read_byte(t, |
| PCI_SECONDARY_BUS)); |
| break; |
| default: |
| a->debug |
| ("Device %04x:%02x:%02x.%d has unknown header type %02x.\n", |
| d->domain, d->bus, d->dev, d->func, |
| ht); |
| } |
| } |
| } |
| pci_free_dev(t); |
| } |
| |
| void pci_generic_scan(struct pci_access *a) |
| { |
| byte busmap[256]; |
| |
| bzero(busmap, sizeof(busmap)); |
| pci_generic_scan_bus(a, busmap, 0); |
| } |
| |
| int pci_generic_fill_info(struct pci_dev *d, int flags) |
| { |
| struct pci_access *a = d->access; |
| |
| if ((flags & (PCI_FILL_BASES | PCI_FILL_ROM_BASE)) |
| && d->hdrtype < 0) |
| d->hdrtype = pci_read_byte(d, PCI_HEADER_TYPE) & 0x7f; |
| if (flags & PCI_FILL_IDENT) { |
| d->vendor_id = pci_read_word(d, PCI_VENDOR_ID); |
| d->device_id = pci_read_word(d, PCI_DEVICE_ID); |
| } |
| if (flags & PCI_FILL_IRQ) |
| d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE); |
| if (flags & PCI_FILL_BASES) { |
| int cnt = 0, i; |
| bzero(d->base_addr, sizeof(d->base_addr)); |
| switch (d->hdrtype) { |
| case PCI_HEADER_TYPE_NORMAL: |
| cnt = 6; |
| break; |
| case PCI_HEADER_TYPE_BRIDGE: |
| cnt = 2; |
| break; |
| case PCI_HEADER_TYPE_CARDBUS: |
| cnt = 1; |
| break; |
| } |
| if (cnt) { |
| for (i = 0; i < cnt; i++) { |
| u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i * 4); |
| if (!x || x == (u32) ~ 0) |
| continue; |
| if ((x & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) |
| d->base_addr[i] = x; |
| else { |
| if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) != PCI_BASE_ADDRESS_MEM_TYPE_64) |
| d->base_addr[i] = x; |
| else if (i >= cnt - 1) |
| a->warning("%04x:%02x:%02x.%d: Invalid 64-bit address seen for BAR %d.", |
| d->domain, d->bus, |
| d->dev, d->func, i); |
| else { |
| u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i) * 4); |
| #ifdef PCI_HAVE_64BIT_ADDRESS |
| d->base_addr[i - 1] = x | (((pciaddr_t) y) << 32); |
| #else |
| if (y) |
| a->warning("%04x:%02x:%02x.%d 64-bit device address ignored.", |
| d->domain, |
| d->bus, |
| d->dev, |
| d->func); |
| else |
| d->base_addr[i - 1] = x; |
| #endif |
| } |
| } |
| } |
| } |
| } |
| if (flags & PCI_FILL_ROM_BASE) { |
| int reg = 0; |
| d->rom_base_addr = 0; |
| switch (d->hdrtype) { |
| case PCI_HEADER_TYPE_NORMAL: |
| reg = PCI_ROM_ADDRESS; |
| break; |
| case PCI_HEADER_TYPE_BRIDGE: |
| reg = PCI_ROM_ADDRESS1; |
| break; |
| } |
| if (reg) { |
| u32 u = pci_read_long(d, reg); |
| if (u != 0xffffffff) |
| d->rom_base_addr = u; |
| } |
| } |
| return flags & ~PCI_FILL_SIZES; |
| } |
| |
| static int |
| pci_generic_block_op(struct pci_dev *d, int pos, byte * buf, int len, |
| int (*r) (struct pci_dev * d, int pos, byte * buf, |
| int len)) |
| { |
| if ((pos & 1) && len >= 1) { |
| if (!r(d, pos, buf, 1)) |
| return 0; |
| pos++; |
| buf++; |
| len--; |
| } |
| if ((pos & 3) && len >= 2) { |
| if (!r(d, pos, buf, 2)) |
| return 0; |
| pos += 2; |
| buf += 2; |
| len -= 2; |
| } |
| while (len >= 4) { |
| if (!r(d, pos, buf, 4)) |
| return 0; |
| pos += 4; |
| buf += 4; |
| len -= 4; |
| } |
| if (len >= 2) { |
| if (!r(d, pos, buf, 2)) |
| return 0; |
| pos += 2; |
| buf += 2; |
| len -= 2; |
| } |
| if (len && !r(d, pos, buf, 1)) |
| return 0; |
| return 1; |
| } |
| |
| int pci_generic_block_read(struct pci_dev *d, int pos, byte * buf, int len) |
| { |
| return pci_generic_block_op(d, pos, buf, len, d->access->methods->read); |
| } |
| |
| int pci_generic_block_write(struct pci_dev *d, int pos, byte * buf, int len) |
| { |
| return pci_generic_block_op(d, pos, buf, len, d->access->methods->write); |
| } |