From 2c2545da4d6f060cd6b64c71469a61cd455ba6d9 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@skynet.be>
Date: Tue, 11 Nov 2008 17:43:40 +0100
Subject: uvcvideo: Enable compilation on kernels older than 2.6.22

From: Laurent Pinchart <laurent.pinchart@skynet.be>

The uvcvideo driver makes use of the usb_endpoint_* functions as well as
the list_first_entry and uninitialized_var macros. Add them to v4l/compat.h
and update the driver with kernel version-based conditional compilation
sections.

Priority: normal

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
---
 v4l/compat.h | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

(limited to 'v4l/compat.h')

diff --git a/v4l/compat.h b/v4l/compat.h
index 3c0c2e345..d041cbe38 100644
--- a/v4l/compat.h
+++ b/v4l/compat.h
@@ -258,4 +258,69 @@ static inline int list_is_singular(const struct list_head *head)
 #define PCI_DEVICE_ID_MARVELL_88ALP01_CCIC     0x4102
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+#ifdef __LINUX_USB_H
+/*
+ * usb_endpoint_* functions
+ *
+ * Included in Linux 2.6.19
+ * Backported to 2.6.18 in Red Hat Enterprise Linux 5.2
+ */
+
+#ifdef RHEL_RELEASE_CODE
+#if RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 2)
+#define RHEL_HAS_USB_ENDPOINT
+#endif
+#endif
+
+#ifndef RHEL_HAS_USB_ENDPOINT
+static inline int
+usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN;
+}
+
+static inline int
+usb_endpoint_xfer_int(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+		USB_ENDPOINT_XFER_INT;
+}
+
+static inline int
+usb_endpoint_xfer_isoc(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+		USB_ENDPOINT_XFER_ISOC;
+}
+
+static inline int
+usb_endpoint_xfer_bulk(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+		USB_ENDPOINT_XFER_BULK;
+}
+
+static inline int
+usb_endpoint_is_int_in(const struct usb_endpoint_descriptor *epd)
+{
+	return usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd);
+}
+#endif /* RHEL_HAS_USB_ENDPOINT */
+#endif /* __LINUX_USB_H */
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
+/*
+ * Linked list API
+ */
+#define list_first_entry(ptr, type, member) \
+	list_entry((ptr)->next, type, member)
+
+/*
+ * uninitialized_var() macro
+ */
+#define uninitialized_var(x) x
+#endif
+
 #endif
-- 
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