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added basic bus scanning 

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4741 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2003-09-17 20:38:39 +00:00
parent 0ebeb0c0a8
commit a08f40f828
1 changed files with 58 additions and 7 deletions
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65
src/add-ons/kernel/bus_managers/pci/pci.c
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@ -3,19 +3,70 @@
#include <PCI.h>
#include "pci_priv.h"
bool gIrqRouterAvailable = false;
bool gIrqRouterAvailable = false;
spinlock gConfigLock = 0;
void pci_scan_bus(uint8 bus);
long get_nth_pci_info(long index, pci_info *outInfo);
status_t pci_module_init(void);
status_t pci_module_uninit(void);
int32 std_ops(int32 op, ...);
status_t pci_module_rescan(void);
void pci_scan_device(uint8 bus, uint8 dev, uint8 func);
void pci_scan_bus(uint8 bus);
long get_nth_pci_info(long index, pci_info *outInfo);
status_t pci_module_init(void);
status_t pci_module_uninit(void);
int32 std_ops(int32 op, ...);
status_t pci_module_rescan(void);
void
pci_scan_device(uint8 bus, uint8 dev, uint8 func)
{
uint16 vendorID;
uint16 deviceID;
uint8 base_class, sub_class;
deviceID = pci_read_config(bus, dev, 0, PCI_device_id, 2);
if (deviceID == 0xffff)
return;
dprintf("PCI: pci_scan_device, bus %u, device %u, function %u\n", bus, dev, func);
vendorID = pci_read_config(bus, dev, 0, PCI_vendor_id, 2);
base_class = pci_read_config(bus, dev, func, PCI_class_base, 1);
sub_class = pci_read_config(bus, dev, func, PCI_class_sub, 1);
dprintf("PCI: vendor 0x%04x, device 0x%04x, base_class 0x%02x, sub_class 0x%02x\n",
vendorID, deviceID, base_class, sub_class);
if (base_class == PCI_bridge) {
uint8 secondary_bus = pci_read_config(bus, dev, func, PCI_secondary_bus, 1);
pci_scan_bus(secondary_bus);
}
}
void
pci_scan_bus(uint8 bus)
{
uint8 dev;
dprintf("PCI: pci_scan_bus, bus %u\n", bus);
for (dev = 0; dev < gMaxBusDevices; dev++) {
uint16 vendorID = pci_read_config(bus, dev, 0, PCI_vendor_id, 2);
uint16 deviceID;
uint8 type, func, nfunc;
if (vendorID == 0xffff)
continue;
deviceID = pci_read_config(bus, dev, 0, PCI_device_id, 2);
type = pci_read_config(bus, dev, 0, PCI_header_type, 1);
type &= PCI_header_type_mask;
if ((type & PCI_multifunction) == 0 /*&& !pci_quirk_multifunction(vendorID, deviceID) */)
nfunc = 1;
else
nfunc = 8;
for (func = 0; func < nfunc; func++)
pci_scan_device(bus, dev, func);
}
}