starred/linux-legacy
1
0
Fork 0
mirror of https://github.com/genesi/linux-legacy.git synced 2026-05-19 21:40:56 +00:00
Code Issues 2 Packages Projects Releases Wiki Activity

USB: add reset endpoint operations

Browse Source 
Wireless USB endpoint state has a sequence number and a current
window and not just a single toggle bit.  So allow HCDs to provide a
endpoint_reset method and call this or clear the software toggles as
required (after a clear halt, set configuration etc.).

usb_settoggle() and friends are then HCD internal and are moved into
core/hcd.h and all device drivers call usb_reset_endpoint() instead.

If the device endpoint state has been reset (with a clear halt) but
the host endpoint state has not then subsequent data transfers will
not complete. The device will only work again after it is reset or
disconnected.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Vrabel
2009-04-08 17:36:28 +00:00
committed by Greg Kroah-Hartman
parent d45e230bf0
commit 3444b26afa
10 changed files with 91 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/usb.h
View File

@@ -1387,6 +1387,7 @@ extern int usb_string(struct usb_device *dev, int index,
extern int usb_clear_halt(struct usb_device *dev, int pipe);
extern int usb_reset_configuration(struct usb_device *dev);
extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate);
extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr);
/* this request isn't really synchronous, but it belongs with the others */
extern int usb_driver_set_configuration(struct usb_device *udev, int config);
@@ -1491,14 +1492,6 @@ void usb_sg_wait(struct usb_sg_request *io);
#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
#define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
#define usb_settoggle(dev, ep, out, bit) \
((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
((bit) << (ep)))
static inline unsigned int __create_pipe(struct usb_device *dev,
unsigned int endpoint)
{