diff options
Diffstat (limited to 'src/pci.c')
| -rw-r--r-- | src/pci.c | 43 |
1 files changed, 43 insertions, 0 deletions
@@ -1,6 +1,11 @@ #include "pci.h" #include "string.h" +#include "stdio.h" + +#define NOF_BUSES 8 +#define NOF_DEVICES_PER_BUS 32 +#define NOF_FUNCTIONS_PER_DEVICE 8 void pci_controller_init( pci_controller_t *controller ) { @@ -46,3 +51,41 @@ void pci_controller_write( pci_controller_t *controller, uint16_t bus, uint16_t port32_write( &controller->data_port, data ); } +void pci_controller_scan( pci_controller_t *controller ) +{ + for( int bus = 0; bus < NOF_BUSES; bus++ ) { + for( int device = 0; device < NOF_DEVICES_PER_BUS; device++ ) { + // TODO: detect single/multi function device from header + for( int function = 0; function < NOF_FUNCTIONS_PER_DEVICE; function++ ) { + pci_device_descriptor_t device_descriptor; + pci_device_descriptor_init( &device_descriptor, controller, bus, device, function ); + + // no device + if( device_descriptor.device_id == 0xFFFF ) { + break; + } + + printf( "%X:%X.%d: %X:%X (class %X:%X, rev: %d)\n", + bus, device, function, + device_descriptor.vendor_id, + device_descriptor.device_id, + device_descriptor.class_id, + device_descriptor.subclass_id, + device_descriptor.revision_id ); + } + } + } +} + +void pci_device_descriptor_init( pci_device_descriptor_t *descriptor, pci_controller_t *controller, uint16_t bus, uint16_t device, uint16_t function ) +{ + memset( descriptor, 0, sizeof( pci_device_descriptor_t ) ); + + descriptor->vendor_id = pci_controller_read( controller, bus, device, function, 0x00 ); + descriptor->device_id = pci_controller_read( controller, bus, device, function, 0x02 ); + descriptor->class_id = pci_controller_read( controller, bus, device, function, 0x0B ); + descriptor->subclass_id = pci_controller_read( controller, bus, device, function, 0x0A ); + descriptor->revision_id = pci_controller_read( controller, bus, device, function, 0x08 ); +} + + |