usb: gadget: zero: Add support for interrupt EP

Interrupt endpoints behave quite similar to the bulk endpoints with the
difference that the endpoints expect data sending/reception request at
particular intervals till the whole data has not been transmitted.

The interrupt EP support is added to gadget zero. A new alternate setting (=2)
has been added. It has 2 interrupt endpoints. The default parameters are set as:
	bInterval: 1 ms for FS and 8 uFrames (implying 1 ms) for HS/SS
	wMaxPacketSize: 64 bytes for FS and 1024 bytes for HS/SS
However, the same can be overridden through the module parameter interface.

The code is tested for HS and SS on a platform having DWC3 controller.

Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Amit Virdi
2014-08-22 14:36:36 +05:30
committed by Felipe Balbi
parent c572a217d1
commit ef11982dd7
4 changed files with 526 additions and 22 deletions

View File

@@ -298,7 +298,8 @@ static void disable_loopback(struct f_loopback *loop)
struct usb_composite_dev *cdev;
cdev = loop->function.config->cdev;
disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);
disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL, NULL,
NULL);
VDBG(cdev, "%s disabled\n", loop->function.name);
}