Date: Wed, 8 Oct 2014 07:00:51 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r272733 - in head/sys/dev/usb: . controller Message-ID: <201410080700.s9870pah000885@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hselasky Date: Wed Oct 8 07:00:50 2014 New Revision: 272733 URL: https://svnweb.freebsd.org/changeset/base/272733 Log: Add support for disabling USB enumeration in general or on selected USB HUBs. MFC after: 2 weeks Modified: head/sys/dev/usb/controller/usb_controller.c head/sys/dev/usb/usb_freebsd.h head/sys/dev/usb/usb_freebsd_loader.h head/sys/dev/usb/usb_hub.c Modified: head/sys/dev/usb/controller/usb_controller.c ============================================================================== --- head/sys/dev/usb/controller/usb_controller.c Wed Oct 8 05:53:04 2014 (r272732) +++ head/sys/dev/usb/controller/usb_controller.c Wed Oct 8 07:00:50 2014 (r272733) @@ -102,6 +102,14 @@ 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[] = { @@ -371,7 +379,8 @@ usb_bus_explore(struct usb_proc_msg *pm) USB_BUS_LOCK(bus); } - if (udev != NULL && udev->hub != NULL) { + if (usb_disable_enumeration == 0 && + udev != NULL && udev->hub != NULL) { if (bus->do_probe) { bus->do_probe = 0; Modified: head/sys/dev/usb/usb_freebsd.h ============================================================================== --- head/sys/dev/usb/usb_freebsd.h Wed Oct 8 05:53:04 2014 (r272732) +++ head/sys/dev/usb/usb_freebsd.h Wed Oct 8 07:00:50 2014 (r272733) @@ -50,6 +50,7 @@ #define USB_HAVE_FIXED_IFACE 0 #define USB_HAVE_FIXED_CONFIG 0 #define USB_HAVE_FIXED_PORT 0 +#define USB_HAVE_DISABLE_ENUM 1 /* define zero ticks callout value */ #define USB_CALLOUT_ZERO_TICKS 1 Modified: head/sys/dev/usb/usb_freebsd_loader.h ============================================================================== --- head/sys/dev/usb/usb_freebsd_loader.h Wed Oct 8 05:53:04 2014 (r272732) +++ head/sys/dev/usb/usb_freebsd_loader.h Wed Oct 8 07:00:50 2014 (r272733) @@ -50,6 +50,7 @@ #define USB_HAVE_FIXED_IFACE 0 #define USB_HAVE_FIXED_CONFIG 0 #define USB_HAVE_FIXED_PORT 0 +#define USB_HAVE_DISABLE_ENUM 0 #define USB_CALLOUT_ZERO_TICKS 1 Modified: head/sys/dev/usb/usb_hub.c ============================================================================== --- head/sys/dev/usb/usb_hub.c Wed Oct 8 05:53:04 2014 (r272732) +++ head/sys/dev/usb/usb_hub.c Wed Oct 8 07:00:50 2014 (r272733) @@ -111,6 +111,9 @@ struct uhub_softc { struct mtx sc_mtx; /* our mutex */ struct usb_device *sc_udev; /* USB device */ struct usb_xfer *sc_xfer[UHUB_N_TRANSFER]; /* interrupt xfer */ +#if USB_HAVE_DISABLE_ENUM + int sc_disable_enumeration; +#endif uint8_t sc_flags; #define UHUB_FLAG_DID_EXPLORE 0x01 }; @@ -993,6 +996,13 @@ 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); @@ -1188,6 +1198,10 @@ uhub_attach(device_t dev) struct usb_hub *hub; struct usb_hub_descriptor hubdesc20; struct usb_hub_ss_descriptor hubdesc30; +#if USB_HAVE_DISABLE_ENUM + struct sysctl_ctx_list *sysctl_ctx; + struct sysctl_oid *sysctl_tree; +#endif uint16_t pwrdly; uint16_t nports; uint8_t x; @@ -1469,6 +1483,19 @@ uhub_attach(device_t dev) usbd_set_power_mode(udev, USB_POWER_MODE_SAVE); +#if USB_HAVE_DISABLE_ENUM + /* Add device sysctls */ + + sysctl_ctx = device_get_sysctl_ctx(dev); + sysctl_tree = device_get_sysctl_tree(dev); + + if (sysctl_ctx != NULL && sysctl_tree != NULL) { + (void) SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), + OID_AUTO, "disable_enumeration", CTLFLAG_RWTUN, + &sc->sc_disable_enumeration, 0, + "Set to disable enumeration on this USB HUB."); + } +#endif return (0); error:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201410080700.s9870pah000885>