xref: /aosp_15_r20/external/pciutils/example.c (revision c2e0c6b56a71da9abe8df5c8348fb3eb5c2c9251)
1*c2e0c6b5SAndroid Build Coastguard Worker /*
2*c2e0c6b5SAndroid Build Coastguard Worker  *	The PCI Library -- Example of use (simplistic lister of PCI devices)
3*c2e0c6b5SAndroid Build Coastguard Worker  *
4*c2e0c6b5SAndroid Build Coastguard Worker  *	Written by Martin Mares and put to public domain. You can do
5*c2e0c6b5SAndroid Build Coastguard Worker  *	with it anything you want, but I don't give you any warranty.
6*c2e0c6b5SAndroid Build Coastguard Worker  */
7*c2e0c6b5SAndroid Build Coastguard Worker 
8*c2e0c6b5SAndroid Build Coastguard Worker #include <stdio.h>
9*c2e0c6b5SAndroid Build Coastguard Worker 
10*c2e0c6b5SAndroid Build Coastguard Worker #include "lib/pci.h"
11*c2e0c6b5SAndroid Build Coastguard Worker 
main(void)12*c2e0c6b5SAndroid Build Coastguard Worker int main(void)
13*c2e0c6b5SAndroid Build Coastguard Worker {
14*c2e0c6b5SAndroid Build Coastguard Worker   struct pci_access *pacc;
15*c2e0c6b5SAndroid Build Coastguard Worker   struct pci_dev *dev;
16*c2e0c6b5SAndroid Build Coastguard Worker   unsigned int c;
17*c2e0c6b5SAndroid Build Coastguard Worker   char namebuf[1024], *name;
18*c2e0c6b5SAndroid Build Coastguard Worker 
19*c2e0c6b5SAndroid Build Coastguard Worker   pacc = pci_alloc();		/* Get the pci_access structure */
20*c2e0c6b5SAndroid Build Coastguard Worker   /* Set all options you want -- here we stick with the defaults */
21*c2e0c6b5SAndroid Build Coastguard Worker   pci_init(pacc);		/* Initialize the PCI library */
22*c2e0c6b5SAndroid Build Coastguard Worker   pci_scan_bus(pacc);		/* We want to get the list of devices */
23*c2e0c6b5SAndroid Build Coastguard Worker   for (dev=pacc->devices; dev; dev=dev->next)	/* Iterate over all devices */
24*c2e0c6b5SAndroid Build Coastguard Worker     {
25*c2e0c6b5SAndroid Build Coastguard Worker       pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_CLASS);	/* Fill in header info we need */
26*c2e0c6b5SAndroid Build Coastguard Worker       c = pci_read_byte(dev, PCI_INTERRUPT_PIN);				/* Read config register directly */
27*c2e0c6b5SAndroid Build Coastguard Worker       printf("%04x:%02x:%02x.%d vendor=%04x device=%04x class=%04x irq=%d (pin %d) base0=%lx",
28*c2e0c6b5SAndroid Build Coastguard Worker 	     dev->domain, dev->bus, dev->dev, dev->func, dev->vendor_id, dev->device_id,
29*c2e0c6b5SAndroid Build Coastguard Worker 	     dev->device_class, dev->irq, c, (long) dev->base_addr[0]);
30*c2e0c6b5SAndroid Build Coastguard Worker 
31*c2e0c6b5SAndroid Build Coastguard Worker       /* Look up and print the full name of the device */
32*c2e0c6b5SAndroid Build Coastguard Worker       name = pci_lookup_name(pacc, namebuf, sizeof(namebuf), PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id);
33*c2e0c6b5SAndroid Build Coastguard Worker       printf(" (%s)\n", name);
34*c2e0c6b5SAndroid Build Coastguard Worker     }
35*c2e0c6b5SAndroid Build Coastguard Worker   pci_cleanup(pacc);		/* Close everything */
36*c2e0c6b5SAndroid Build Coastguard Worker   return 0;
37*c2e0c6b5SAndroid Build Coastguard Worker }
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