New patch to review for coreboot: 5b0c84f device_romstage: Add a way to find tdev struct from port/dev no.

[Edward O'Callaghan]

Edward O'Callaghan ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6221

-gerrit

commit 5b0c84fb7da2dcb7e617548082af0b0a811d9920
Author: Edward O'Callaghan 
Date:   Wed Jul 9 00:25:10 2014 +1000

device_romstage: Add a way to find tdev struct from port/dev no.

NOTFORMERGE

When trying to loop through all the devices in romstage, there was
    no function to translate a PnP port and device number to the
    corresponding device structure.

Change-Id: I73bd396a5247077aa09e01c0f22510a8b2777ab8
    Signed-off-by: Edward O'Callaghan 
---
 src/device/device_romstage.c | 21 +++++++++++++++++++++
 src/include/device/device.h  |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/device/device_romstage.c b/src/device/device_romstage.c
index 987fdad..df0df6a 100644
--- a/src/device/device_romstage.c
+++ b/src/device/device_romstage.c
@@ -101,3 +101,24 @@ ROMSTAGE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus,
    }
    return result;
 }
+
+/**
+ * Given a PnP port and a device number, find the device structure.
+ *
+ * @param port The I/O port.
+ * @param device Logical device number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+ROMSTAGE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device)
+{
+	ROMSTAGE_CONST struct device *dev;
+
+	for (dev = all_devices; dev; dev = dev->next) {
+		if ((dev->path.type == DEVICE_PATH_PNP) &&
+		    (dev->path.pnp.port == port) &&
+		    (dev->path.pnp.device == device)) {
+			return dev;
+		}
+	}
+	return 0;
+}
diff --git a/src/include/device/device.h b/src/include/device/device.h
index ec17adf..77778db 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -248,6 +248,7 @@ ROMSTAGE_CONST struct device *dev_find_next_pci_device(
    					ROMSTAGE_CONST struct device *previous_dev);
 ROMSTAGE_CONST struct device * dev_find_slot_on_smbus (unsigned int bus,
    						unsigned int addr);
+ROMSTAGE_CONST struct device * dev_find_slot_pnp(u16 port, u16 device);

#endif