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Refine support for disabling USB enumeration to allow device detach

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and suspend and resume of existing devices.

MFC after:	2 weeks
This commit is contained in:
Hans Petter Selasky 2014-10-09 06:24:06 +00:00
parent 15f3c56e3d
commit f80ccb40c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=272807
2 changed files with 20 additions and 22 deletions
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11
sys/dev/usb/controller/usb_controller.c
View file

@ -102,14 +102,6 @@ static int usb_no_shutdown_wait = 0;
SYSCTL_INT(_hw_usb, OID_AUTO, no_shutdown_wait, CTLFLAG_RWTUN,
&usb_no_shutdown_wait, 0, "No USB device waiting at system shutdown.");
#if USB_HAVE_DISABLE_ENUM
static int usb_disable_enumeration = 0;
SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN,
&usb_disable_enumeration, 0, "Set to disable all USB device enumeration.");
#else
#define usb_disable_enumeration 0
#endif
static devclass_t usb_devclass;
static device_method_t usb_methods[] = {
@ -379,8 +371,7 @@ usb_bus_explore(struct usb_proc_msg *pm)
USB_BUS_LOCK(bus);
}
if (usb_disable_enumeration == 0 &&
udev != NULL && udev->hub != NULL) {
if (udev != NULL && udev->hub != NULL) {
if (bus->do_probe) {
bus->do_probe = 0;

31
sys/dev/usb/usb_hub.c
View file

@ -97,6 +97,12 @@ SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_RW,
&usb_power_timeout, 0, "USB power timeout");
#endif
#if USB_HAVE_DISABLE_ENUM
static int usb_disable_enumeration = 0;
SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN,
&usb_disable_enumeration, 0, "Set to disable all USB device enumeration.");
#endif
struct uhub_current_state {
uint16_t port_change;
uint16_t port_status;
@ -621,9 +627,9 @@ uhub_reattach_port(struct uhub_softc *sc, uint8_t portno)
err = usbd_req_clear_port_feature(udev, NULL,
portno, UHF_C_PORT_CONNECTION);
if (err) {
if (err)
goto error;
}
/* check if there is a child */
if (child != NULL) {
@ -636,14 +642,22 @@ uhub_reattach_port(struct uhub_softc *sc, uint8_t portno)
/* get fresh status */
err = uhub_read_port_status(sc, portno);
if (err) {
if (err)
goto error;
#if USB_HAVE_DISABLE_ENUM
/* check if we should skip enumeration from this USB HUB */
if (usb_disable_enumeration != 0 ||
sc->sc_disable_enumeration != 0) {
DPRINTF("Enumeration is disabled!\n");
goto error;
}
#endif
/* check if nothing is connected to the port */
if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS)) {
if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))
goto error;
}
/* check if there is no power on the port and print a warning */
switch (udev->speed) {
@ -996,13 +1010,6 @@ uhub_explore(struct usb_device *udev)
DPRINTFN(11, "udev=%p addr=%d\n", udev, udev->address);
#if USB_HAVE_DISABLE_ENUM
/* check if we should skip enumeration from this USB HUB */
if (sc->sc_disable_enumeration != 0) {
DPRINTF("Enumeration is disabled!\n");
return (0);
}
#endif
/* ignore devices that are too deep */
if (uhub_is_too_deep(udev))
return (USB_ERR_TOO_DEEP);