mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 23:56:49 +03:00
129 lines
2.5 KiB
C++
129 lines
2.5 KiB
C++
|
|
#define PCI_FIND_CAP_TTL 48
|
|
|
|
static int __pci_find_next_cap_ttl(PCITAG pciTag, u8_t pos,
|
|
int cap, int *ttl)
|
|
{
|
|
u8_t id;
|
|
|
|
while ((*ttl)--)
|
|
{
|
|
pos = pciReadByte(pciTag, pos);
|
|
if (pos < 0x40)
|
|
break;
|
|
pos &= ~3;
|
|
id = pciReadByte(pciTag, pos + PCI_CAP_LIST_ID);
|
|
if (id == 0xff)
|
|
break;
|
|
if (id == cap)
|
|
return pos;
|
|
pos += PCI_CAP_LIST_NEXT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __pci_find_next_cap(PCITAG pciTag, u8_t pos, int cap)
|
|
{
|
|
int ttl = PCI_FIND_CAP_TTL;
|
|
|
|
return __pci_find_next_cap_ttl(pciTag, pos, cap, &ttl);
|
|
}
|
|
|
|
static int __pci_bus_find_cap_start(PCITAG pciTag)
|
|
{
|
|
u16_t status;
|
|
u8_t hdr_type;
|
|
|
|
status = pciReadWord(pciTag, PCI_STATUS);
|
|
if (!(status & PCI_STATUS_CAP_LIST))
|
|
return 0;
|
|
|
|
hdr_type = pciReadByte(pciTag, 0x0E);
|
|
switch (hdr_type)
|
|
{
|
|
case PCI_HEADER_TYPE_NORMAL:
|
|
case PCI_HEADER_TYPE_BRIDGE:
|
|
return PCI_CAPABILITY_LIST;
|
|
case PCI_HEADER_TYPE_CARDBUS:
|
|
return PCI_CB_CAPABILITY_LIST;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int pci_find_capability(PCITAG pciTag, int cap)
|
|
{
|
|
int pos;
|
|
|
|
pos = __pci_bus_find_cap_start(pciTag);
|
|
if (pos)
|
|
pos = __pci_find_next_cap(pciTag, pos, cap);
|
|
|
|
return pos;
|
|
}
|
|
|
|
|
|
PCITAG pci_find_class(u16_t class)
|
|
{
|
|
u32_t bus, last_bus;
|
|
PCITAG tag;
|
|
|
|
if( (last_bus = PciApi(1))==-1)
|
|
return -1;
|
|
|
|
for(bus=0;bus<=last_bus;bus++)
|
|
{
|
|
u32_t devfn;
|
|
|
|
for(devfn=0;devfn<256;devfn++)
|
|
{
|
|
u16_t devclass;
|
|
|
|
devclass = PciRead16(bus,devfn, 0x0A);
|
|
|
|
if( devclass != class)
|
|
continue;
|
|
|
|
return pciTag(bus,(devfn>>3)&0x1F,devfn&0x7);
|
|
};
|
|
};
|
|
return -1;
|
|
};
|
|
|
|
|
|
PCITAG pci_get_device(u32_t vendor, u32_t device, PCITAG from)
|
|
{
|
|
u32_t bus, last_bus;
|
|
u32_t devfn;
|
|
|
|
if( (last_bus = PciApi(1))==-1)
|
|
return -1;
|
|
|
|
bus = PCI_BUS_FROM_TAG(from);
|
|
devfn = PCI_DFN_FROM_TAG(from);
|
|
|
|
devfn++;
|
|
|
|
for(;bus<=last_bus; bus++)
|
|
{
|
|
for(;devfn < 256;devfn++)
|
|
{
|
|
u32_t tmp;
|
|
u32_t dev_vendor;
|
|
u32_t dev_id;
|
|
|
|
tmp = PciRead32(bus,devfn, 0);
|
|
|
|
dev_vendor = (u16_t)tmp;
|
|
dev_id = tmp >> 16;
|
|
|
|
if ((vendor == PCI_ANY_ID || dev_vendor == vendor))
|
|
return pciTag(bus,(devfn>>3)&0x1F,devfn&0x7);
|
|
};
|
|
};
|
|
return -1;
|
|
}
|
|
|