ralink: make dcs930 uvc camera work

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38054 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 255 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.10/0205-uvc-add-iPassion-iP2970-support.patch b/target/linux/ramips/patches-3.10/0205-uvc-add-iPassion-iP2970-support.patch
new file mode 100644
index 0000000000..5c5cf7f596
--- /dev/null
+++ b/target/linux/ramips/patches-3.10/0205-uvc-add-iPassion-iP2970-support.patch
@@ -0,0 +1,255 @@
+From be8d5b55f93b8ccb3a6b5cfb1e858a59aeca2d6c Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Thu, 19 Sep 2013 01:50:59 +0200
+Subject: [PATCH] uvc: add iPassion iP2970 support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/media/usb/uvc/uvc_driver.c |   12 +++++++++
+ drivers/media/usb/uvc/uvc_status.c |    2 ++
+ drivers/media/usb/uvc/uvc_v4l2.c   |    1 +
+ drivers/media/usb/uvc/uvc_video.c  |   50 +++++++++++++++++++++++++++++++-----
+ drivers/media/usb/uvc/uvcvideo.h   |    3 +++
+ 5 files changed, 61 insertions(+), 7 deletions(-)
+
+Index: linux-3.10.12/drivers/media/usb/uvc/uvc_driver.c
+===================================================================
+--- linux-3.10.12.orig/drivers/media/usb/uvc/uvc_driver.c	2013-09-14 15:55:12.000000000 +0200
++++ linux-3.10.12/drivers/media/usb/uvc/uvc_driver.c	2013-09-19 04:30:11.825592123 +0200
+@@ -2420,6 +2420,20 @@
+ 	  .bInterfaceProtocol	= 0,
+ 	  .driver_info		= UVC_QUIRK_PROBE_MINMAX
+ 				| UVC_QUIRK_IGNORE_SELECTOR_UNIT },
++
++/* iPassion iP2970 */
++	{ .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
++				| USB_DEVICE_ID_MATCH_INT_INFO,
++	 .idVendor		= 0x1B3B,
++	 .idProduct		= 0x2970,
++	 .bInterfaceClass	= USB_CLASS_VIDEO,
++	 .bInterfaceSubClass	= 1,
++	 .bInterfaceProtocol	= 0,
++	 .driver_info		= UVC_QUIRK_PROBE_MINMAX
++				| UVC_QUIRK_STREAM_NO_FID
++				| UVC_QUIRK_MOTION
++				| UVC_QUIRK_SINGLE_ISO },
++
+ 	/* Generic USB Video Class */
+ 	{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
+ 	{}
+Index: linux-3.10.12/drivers/media/usb/uvc/uvc_status.c
+===================================================================
+--- linux-3.10.12.orig/drivers/media/usb/uvc/uvc_status.c	2013-09-14 15:55:12.000000000 +0200
++++ linux-3.10.12/drivers/media/usb/uvc/uvc_status.c	2013-09-19 01:52:55.721188742 +0200
+@@ -139,6 +139,7 @@
+ 		switch (dev->status[0] & 0x0f) {
+ 		case UVC_STATUS_TYPE_CONTROL:
+ 			uvc_event_control(dev, dev->status, len);
++			dev->motion = 1;
+ 			break;
+ 
+ 		case UVC_STATUS_TYPE_STREAMING:
+@@ -182,6 +183,7 @@
+ 	}
+ 
+ 	pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress);
++	dev->motion = 0;
+ 
+ 	/* For high-speed interrupt endpoints, the bInterval value is used as
+ 	 * an exponent of two. Some developers forgot about it.
+Index: linux-3.10.12/drivers/media/usb/uvc/uvc_video.c
+===================================================================
+--- linux-3.10.12.orig/drivers/media/usb/uvc/uvc_video.c	2013-09-14 15:55:12.000000000 +0200
++++ linux-3.10.12/drivers/media/usb/uvc/uvc_video.c	2013-09-19 07:31:28.642057093 +0200
+@@ -21,6 +21,11 @@
+ #include <linux/wait.h>
+ #include <linux/atomic.h>
+ #include <asm/unaligned.h>
++#include <linux/skbuff.h>
++#include <linux/kobject.h>
++#include <linux/netlink.h>
++#include <linux/kobject.h>
++#include <linux/workqueue.h>
+ 
+ #include <media/v4l2-common.h>
+ 
+@@ -1074,9 +1079,149 @@
+ 	}
+ }
+ 
++struct bh_priv {
++	unsigned long	seen;
++};
++
++struct bh_event {
++	const char		*name;
++	struct sk_buff		*skb;
++	struct work_struct	work;
++};
++
++#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, "webcam", ##args )
++#define BH_DBG(fmt, args...) do {} while (0)
++#define BH_SKB_SIZE     2048
++
++extern u64 uevent_next_seqnum(void);
++static int seen = 0;
++
++static int bh_event_add_var(struct bh_event *event, int argv,
++		const char *format, ...)
++{
++	static char buf[128];
++	char *s;
++	va_list args;
++	int len;
++
++	if (argv)
++		return 0;
++
++	va_start(args, format);
++	len = vsnprintf(buf, sizeof(buf), format, args);
++	va_end(args);
++
++	if (len >= sizeof(buf)) {
++		BH_ERR("buffer size too small\n");
++		WARN_ON(1);
++		return -ENOMEM;
++	}
++
++	s = skb_put(event->skb, len + 1);
++	strcpy(s, buf);
++
++	BH_DBG("added variable '%s'\n", s);
++
++	return 0;
++}
++
++static int motion_hotplug_fill_event(struct bh_event *event)
++{
++	int s = jiffies;
++	int ret;
++
++	if (!seen)
++		seen = jiffies;
++
++	ret = bh_event_add_var(event, 0, "HOME=%s", "/");
++	if (ret)
++		return ret;
++
++	ret = bh_event_add_var(event, 0, "PATH=%s",
++		"/sbin:/bin:/usr/sbin:/usr/bin");
++	if (ret)
++		return ret;
++
++	ret = bh_event_add_var(event, 0, "SUBSYSTEM=usb");
++	if (ret)
++		return ret;
++
++	ret = bh_event_add_var(event, 0, "ACTION=motion");
++	if (ret)
++		return ret;
++
++	ret = bh_event_add_var(event, 0, "SEEN=%d", s - seen);
++	if (ret)
++		return ret;
++	seen = s;
++
++	ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());
++
++	return ret;
++}
++
++static void motion_hotplug_work(struct work_struct *work)
++{
++	struct bh_event *event = container_of(work, struct bh_event, work);
++	int ret = 0;
++
++	event->skb = alloc_skb(BH_SKB_SIZE, GFP_KERNEL);
++	if (!event->skb)
++		goto out_free_event;
++
++	ret = bh_event_add_var(event, 0, "%s@", "add");
++	if (ret)
++		goto out_free_skb;
++
++	ret = motion_hotplug_fill_event(event);
++	if (ret)
++		goto out_free_skb;
++
++	NETLINK_CB(event->skb).dst_group = 1;
++	broadcast_uevent(event->skb, 0, 1, GFP_KERNEL);
++
++out_free_skb:
++	if (ret) {
++		BH_ERR("work error %d\n", ret);
++		kfree_skb(event->skb);
++	}
++out_free_event:
++	kfree(event);
++}
++
++static int motion_hotplug_create_event(void)
++{
++	struct bh_event *event;
++
++	event = kzalloc(sizeof(*event), GFP_KERNEL);
++	if (!event)
++		return -ENOMEM;
++
++	event->name = "motion";
++
++	INIT_WORK(&event->work, (void *)(void *)motion_hotplug_work);
++	schedule_work(&event->work);
++
++	return 0;
++}
++
++#define MOTION_FLAG_OFFSET	4
+ static void uvc_video_decode_end(struct uvc_streaming *stream,
+ 		struct uvc_buffer *buf, const __u8 *data, int len)
+ {
++	if ((stream->dev->quirks & UVC_QUIRK_MOTION) &&
++			(data[len - 2] == 0xff) && (data[len - 1] == 0xd9)) {
++		u8 *mem;
++		buf->state = UVC_BUF_STATE_READY;
++		mem = (u8 *) (buf->mem + MOTION_FLAG_OFFSET);
++		if ( stream->dev->motion ) {
++			stream->dev->motion = 0;
++			motion_hotplug_create_event();
++		} else {
++			*mem &= 0x7f;
++		}
++	}
++
+ 	/* Mark the buffer as done if the EOF marker is set. */
+ 	if (data[1] & UVC_STREAM_EOF && buf->bytesused != 0) {
+ 		uvc_trace(UVC_TRACE_FRAME, "Frame complete (EOF found).\n");
+@@ -1477,6 +1622,8 @@
+ 	if (npackets == 0)
+ 		return -ENOMEM;
+ 
++	if (stream->dev->quirks & UVC_QUIRK_SINGLE_ISO)
++		npackets = 1;
+ 	size = npackets * psize;
+ 
+ 	for (i = 0; i < UVC_URBS; ++i) {
+Index: linux-3.10.12/drivers/media/usb/uvc/uvcvideo.h
+===================================================================
+--- linux-3.10.12.orig/drivers/media/usb/uvc/uvcvideo.h	2013-09-14 15:55:12.000000000 +0200
++++ linux-3.10.12/drivers/media/usb/uvc/uvcvideo.h	2013-09-19 04:36:51.801609222 +0200
+@@ -137,6 +137,8 @@
+ #define UVC_QUIRK_FIX_BANDWIDTH		0x00000080
+ #define UVC_QUIRK_PROBE_DEF		0x00000100
+ #define UVC_QUIRK_RESTRICT_FRAME_RATE	0x00000200
++#define UVC_QUIRK_MOTION		0x00000400
++#define UVC_QUIRK_SINGLE_ISO		0x00000800
+ 
+ /* Format flags */
+ #define UVC_FMT_FLAG_COMPRESSED		0x00000001
+@@ -538,6 +540,7 @@
+ 	__u8 *status;
+ 	struct input_dev *input;
+ 	char input_phys[64];
++	int motion;
+ };
+ 
+ enum uvc_handle_state {