2007-09-06 Daniel Hellstrom <daniel@gaisler.com>

* shared/pci/pcifinddevice.c: New file.

c/src/lib/libbsp/sparc/ChangeLog

@@ -1,3 +1,7 @@
+2007-09-06	Daniel Hellstrom <daniel@gaisler.com>
+
+	* shared/pci/pcifinddevice.c: New file.
+
 2007-09-06	Joel Sherrill <joel.sherrill@OARcorp.com>
 
 	* shared/uart/apbuart.c: Fix some warnings.

c/src/lib/libbsp/sparc/shared/pci/pcifinddevice.c

@@ -0,0 +1,57 @@
+
+/* Author: Till Straumann <strauman@slac.stanford.edu>, 2001 */
+
+/* find a particular PCI device
+ * (we assume, the firmware configured the PCI bus[es] for us)
+ *
+ * pcifinddevice.c,v 1.1.4.2 2003/07/18 15:48:54 joel Exp
+ */
+
+#define PCI_INVALID_VENDORDEVICEID	0xffffffff
+#define PCI_MULTI_FUNCTION			0x80
+
+#include <pci.h>
+#include <rtems/bspIo.h>
+
+int
+BSP_pciFindDevice( unsigned short vendorid, unsigned short deviceid,
+                   int instance, int *pbus, int *pdev, int *pfun )
+{
+   unsigned int d;
+   unsigned short s;
+   unsigned char bus,dev,fun,hd;
+
+	for (bus=0; bus<BusCountPCI(); bus++) {
+      for (dev=0; dev<PCI_MAX_DEVICES; dev++) {
+
+		pci_read_config_byte(bus,dev,0, PCI_HEADER_TYPE, &hd);
+		hd = (hd & PCI_MULTI_FUNCTION ? PCI_MAX_FUNCTIONS : 1);
+
+		for (fun=0; fun<hd; fun++) {
+			/* 
+			 * The last devfn id/slot is special; must skip it
+			 */
+			if (PCI_MAX_DEVICES-1==dev && PCI_MAX_FUNCTIONS-1 == fun)
+				break;
+			(void)pci_read_config_dword(bus,dev,fun,PCI_VENDOR_ID,&d);
+			if (PCI_INVALID_VENDORDEVICEID == d)
+				continue;
+#ifdef PCI_DEBUG
+			printk("BSP_pciFindDevice: found 0x%08x at %d/%d/%d\n",d,bus,dev,fun);
+#endif
+			(void) pci_read_config_word(bus,dev,fun,PCI_VENDOR_ID,&s);
+			if (vendorid != s)
+				continue;
+			(void) pci_read_config_word(bus,dev,fun,PCI_DEVICE_ID,&s);
+			if (deviceid == s) {
+				if (instance--) continue;
+				*pbus=bus; *pdev=dev; *pfun=fun;
+				return 0;
+			}
+		}
+      }
+	}
+    return -1;
+}
+
+/* eof */