From 2e01f1f9b9283bf4196a804030e6a536da2a184d Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 3 Sep 2020 20:59:58 +0200
Subject: [PATCH] Kernel: Add PCI::get_programming_interface(PCI::Address)

This returns the programming interface at a given PCI address.
This is sometimes referred to as "prog-if" on other systems.
---
 Kernel/PCI/Access.cpp    | 5 +++++
 Kernel/PCI/Definitions.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/Kernel/PCI/Access.cpp b/Kernel/PCI/Access.cpp
index 999f6b6002d..a480cb8f2e0 100644
--- a/Kernel/PCI/Access.cpp
+++ b/Kernel/PCI/Access.cpp
@@ -193,6 +193,11 @@ u8 get_class(Address address)
     return read8(address, PCI_CLASS);
 }
 
+u8 get_programming_interface(Address address)
+{
+    return read8(address, PCI_PROG_IF);
+}
+
 u16 get_subsystem_id(Address address)
 {
     return read16(address, PCI_SUBSYSTEM_ID);
diff --git a/Kernel/PCI/Definitions.h b/Kernel/PCI/Definitions.h
index 767ff73cc19..5e1741d0db0 100644
--- a/Kernel/PCI/Definitions.h
+++ b/Kernel/PCI/Definitions.h
@@ -208,6 +208,7 @@ u32 get_BAR3(Address);
 u32 get_BAR4(Address);
 u32 get_BAR5(Address);
 u8 get_revision_id(Address);
+u8 get_programming_interface(Address);
 u8 get_subclass(Address);
 u8 get_class(Address);
 u16 get_subsystem_id(Address);