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MFp4 //depot/projects/usb @159479,159502,159516,159522,159529

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Workaround for buggy USB hardware not handling new SETUP packet before STATUS
stage is complete, this allows xfers to endpoint0 to return a short frame.

Submitted by: Hans Petter Selasky
Reported by:  me
This commit is contained in:
Andrew Thompson 2009-03-20 22:01:45 +00:00
parent 0f7d454847
commit e1ccac965c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=190184
1 changed files with 34 additions and 17 deletions
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51
sys/dev/usb/usb_transfer.c
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@ -113,7 +113,6 @@ static const struct usb2_config usb2_control_ep_cfg[USB_DEFAULT_XFER_MAX] = {
.endpoint = 0x00, /* Control pipe */
.direction = UE_DIR_ANY,
.mh.bufsize = sizeof(struct usb2_device_request),
.mh.flags = {},
.mh.callback = &usb2_do_clear_stall_callback,
.mh.timeout = 1000, /* 1 second */
.mh.interval = 50, /* 50ms */
@ -1251,6 +1250,20 @@ usb2_start_hardware_sub(struct usb2_xfer *xfer)
/* no longer active */
xfer->flags_int.control_act = 0;
}
/* Check for invalid number of frames */
if (xfer->nframes > 2) {
/*
* If you need to split a control transfer, you
* have to do one part at a time. Only with
* non-control transfers you can do multiple
* parts a time.
*/
DPRINTFN(0, "Too many frames: %u\n",
(unsigned int)xfer->nframes);
goto error;
}
/*
* Check if there is a control
* transfer in progress:
@ -1495,23 +1508,28 @@ usb2_start_hardware(struct usb2_xfer *xfer)
*/
if (USB_GET_DATA_ISREAD(xfer)) {
if (xfer->flags_int.control_xfr) {
if (xfer->flags.short_frames_ok) {
xfer->flags_int.short_xfer_ok = 1;
xfer->flags_int.short_frames_ok = 1;
} else if (xfer->flags.short_xfer_ok) {
xfer->flags_int.short_xfer_ok = 1;
/*
* Control transfers do not support reception
* of multiple short USB frames !
*/
if (xfer->flags.short_xfer_ok) {
xfer->flags_int.short_xfer_ok = 1;
}
} else {
if (xfer->flags.short_frames_ok) {
xfer->flags_int.short_xfer_ok = 1;
/* check for control transfer */
if (xfer->flags_int.control_xfr) {
/*
* 1) Control transfers do not support
* reception of multiple short USB
* frames in host mode and device side
* mode, with exception of:
*
* 2) Due to sometimes buggy device
* side firmware we need to do a
* STATUS stage in case of short
* control transfers in USB host mode.
* The STATUS stage then becomes the
* "alt_next" to the DATA stage.
*/
xfer->flags_int.short_frames_ok = 1;
} else if (xfer->flags.short_xfer_ok) {
xfer->flags_int.short_xfer_ok = 1;
}
}
}
@ -2652,7 +2670,6 @@ usb2_clear_data_toggle(struct usb2_device *udev, struct usb2_pipe *pipe)
* .interval = 50, //50 milliseconds
* .bufsize = sizeof(struct usb2_device_request),
* .mh.timeout = 1000, //1.000 seconds
* .mh.flags = { },
* .mh.callback = &my_clear_stall_callback, // **
* };
*