[coreboot] [PATCH] libpayload: scan all PCI functions for USB

[Jens Rottmann]

The AMD CS5536's USB controllers are located at device 0F, functions 4
and 5.  They're not found if only function 0 is checked.  So if a device
exists at all, try all its functions.  usb_controller_initialize() will
silently skip all device classes != 0C03.

Signed-off-by: Jens Rottmann <JRottmann at LiPPERTEmbedded.de>
---

--- payloads/libpayload/drivers/usb/usbinit.c	(rev 5767)
+++ payloads/libpayload/drivers/usb/usbinit.c	(working copy)
@@ -126,7 +126,7 @@
 	 */
 	for (bus = 0; bus < 256; bus++)
 		for (dev = 0; dev < 32; dev++)
-			if (pci_read_config32 (PCI_DEV(bus, dev, 0), 8) >> 16 == 0x0c03)
+			if (pci_read_config16(PCI_DEV(bus, dev, 0), 10) != 0xFFFF)
 				for (func = 7; func >= 0 ; func--)
 					usb_controller_initialize (bus, dev, func);
 	usb_poll();
_