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usb: add device connection/disconnection detection

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Provide a function to detect USB device insertion/removal in order to
avoid having to do USB enumeration in a tight loop when trying to detect
peripheral hotplugging.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Vincent Palatin 2015-05-04 11:30:54 -06:00 • committed by Simon Glass
parent 6a72e804a2
commit 08f3bb0bcd
3 changed files with 29 additions and 1 deletions
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2
include/usb.h
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@ -265,6 +265,7 @@ int usb_kbd_deregister(int force);
/* routines */
int usb_init(void); /* initialize the USB Controller */
int usb_stop(void); /* stop the USB Controller */
int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
@ -290,6 +291,7 @@ int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
int usb_clear_halt(struct usb_device *dev, int pipe);
int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
int usb_set_interface(struct usb_device *dev, int interface, int alternate);
int usb_get_port_status(struct usb_device *dev, int port, void *data);
/* big endian -> little endian conversion */
/* some CPUs are already little endian e.g. the ARM920T */