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usb: gadget: uvc: Use macro for interrupt endpoint status size instead of using a MAGIC number 

This patch adds a MACRO for the UVC video control status (interrupt) endpoint and
removes the magic number which was being used earlier.

Some UDCs have issues supporting an interrupt IN endpoint having a max packet
size less than a particular value (say 32). It is easier in that case to simply
change the MACRO value instead of changing the max packet size value at a
number of locations.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Bhupesh Sharma 2012-06-01 15:08:55 +05:30 committed by Felipe Balbi
parent 3de6e63f78
commit 5797663674
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/gadget/f_uvc.c
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@ -59,6 +59,8 @@ static struct usb_gadget_strings *uvc_function_strings[] = {
#define UVC_INTF_VIDEO_CONTROL 0 #define UVC_INTF_VIDEO_CONTROL 0
#define UVC_INTF_VIDEO_STREAMING 1 #define UVC_INTF_VIDEO_STREAMING 1
#define STATUS_BYTECOUNT 16 /* 16 bytes status */
static struct usb_interface_assoc_descriptor uvc_iad __initdata = { static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
.bLength = sizeof(uvc_iad), .bLength = sizeof(uvc_iad),
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
@ -87,7 +89,7 @@ static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
.bDescriptorType = USB_DT_ENDPOINT, .bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN, .bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT, .bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(16), .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
.bInterval = 8, .bInterval = 8,
}; };
@ -95,7 +97,7 @@ static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE, .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_CS_ENDPOINT, .bDescriptorType = USB_DT_CS_ENDPOINT,
.bDescriptorSubType = UVC_EP_INTERRUPT, .bDescriptorSubType = UVC_EP_INTERRUPT,
.wMaxTransferSize = cpu_to_le16(16), .wMaxTransferSize = cpu_to_le16(STATUS_BYTECOUNT),
}; };
static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = { static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {