- 17 7月, 2013 1 次提交
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由 Alan Stern 提交于
The hub driver was recently changed to use "global" suspend for system suspend transitions on non-SuperSpeed buses. This means that we don't suspend devices individually by setting the suspend feature on the upstream hub port; instead devices all go into suspend automatically when the root hub stops transmitting packets. The idea was to save time and to avoid certain kinds of wakeup races. Now it turns out that many hubs are buggy; they don't relay wakeup requests from a downstream port to their upstream port if the downstream port's suspend feature is not set (depending on the speed of the downstream port, whether or not the hub is enabled for remote wakeup, and possibly other factors). We can't have hubs dropping wakeup requests. Therefore this patch goes partway back to the old policy: It sets the suspend feature for a port if the device attached to that port or any of its descendants is enabled for wakeup. People will still be able to benefit from the time savings if they don't care about wakeup and leave it disabled on all their devices. In order to accomplish this, the patch adds a new field to the usb_hub structure: wakeup_enabled_descendants is a count of how many devices below a suspended hub are enabled for remote wakeup. A corresponding new subroutine determines the number of wakeup-enabled devices at or below an arbitrary suspended USB device. This should be applied to the 3.10 stable kernel. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: NToralf Förster <toralf.foerster@gmx.de> Cc: stable <stable@vger.kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 19 6月, 2013 1 次提交
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由 Mathias Nyman 提交于
usb_hub_to_struct_hub() can return NULL in some unlikely cases. Add checks where appropriate, or pass the hub pointer as an additional argument if it's known to be valid. The places it makes sense to check usb_hub_to_struct_hub() are picked based on feedback from Alan Stern. Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com> Acked-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 26 1月, 2013 2 次提交
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由 Lan Tianyu 提交于
This patch is to add usb port auto power off mechanism. When usb device is suspending, usb core will suspend usb port and usb port runtime pm callback will clear PORT_POWER feature to power off port if all conditions were met. These conditions are remote wakeup disable, pm qos NO_POWER_OFF flag clear and persist enable. When it resumes, power on port again. Add did_runtime_put in the struct usb_port to ensure pm_runtime_get/put(portdev) to be called pairedly. Set did_runtime_put to true when call pm_runtime_put(portdev) during suspending. The pm_runtime_get(portdev) only will be called when did_runtime_put is set to true during resuming. Set did_runtime_put to false after calling pm_runtime_get(portdev). Make clear_port_feature() and hdev_to_hub() as global symbol. Rename clear_port_feature() to usb_clear_port_feature() and hdev_to_hub() to usb_hub_to_struct_hub(). Extend hub_port_debounce() with the fuction of debouncing to be connected. Add two wraps: hub_port_debounce_be_connected() and hub_port_debouce_be_stable(). Increase HUB_DEBOUNCE_TIMEOUT to 2000 because some usb ssds needs around 1.5 or more to make the hub port status to be connected steadily after being powered off and powered on. Acked-by: NAlan Stern <stern@rowland.harvard.edu> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NLan Tianyu <tianyu.lan@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Lan Tianyu 提交于
This patch is to add runtime pm callback for usb port device. Set/clear PORT_POWER feature in the resume/suspend callback. Add portnum for struct usb_port to record port number. Do pm_rumtime_get_sync/put(portdev) when a device is plugged/unplugged to prevent it from being powered off when it is active. Acked-by: NAlan Stern <stern@rowland.harvard.edu> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NLan Tianyu <tianyu.lan@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 25 1月, 2013 1 次提交
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由 Alan Stern 提交于
This patch (as1646) fixes a long-standing bug in the USB hub driver. Upon conversion from char to unsigned long, the bytes in the status buffer are subject to unwanted sign extension. The bytes should be declared as u8 rather than char, to prevent this. This effects of this bug are minimal. The hub driver may end up doing a little unnecessary extra work because it thinks events have occurred on some ports when they really haven't. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 19 1月, 2013 1 次提交
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由 Lan Tianyu 提交于
This patch is to create driver/usb/core/(port.c,hub.h) files and move usb port related code into port.c. Signed-off-by: NLan Tianyu <tianyu.lan@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 21 5月, 2010 1 次提交
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由 Eric Lescouet 提交于
The usbcore headers: hcd.h and hub.h are shared between usbcore, HCDs and a couple of other drivers (e.g. USBIP modules). So, it makes sense to move them into a more public location and to cleanup dependency of those modules on kernel internal headers. This patch moves hub.h from drivers/usb/core into include/linux/usb/ Signed-of-by: NEric Lescouet <eric@lescouet.org> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 13 7月, 2009 1 次提交
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由 Alan Stern 提交于
This patch (as1255) updates the interface for calling usb_hub_clear_tt_buffer(). Even the name of the function is changed! When an async URB (i.e., Control or Bulk) going through a high-speed hub to a non-high-speed device is cancelled or fails, the hub's Transaction Translator buffer may be left busy still trying to complete the transaction. The buffer has to be cleared; that's what usb_hub_clear_tt_buffer() does. It isn't safe to send any more URBs to the same endpoint until the TT buffer is fully clear. Therefore the HCD needs to be told when the Clear-TT-Buffer request has finished. This patch adds a callback method to struct hc_driver for that purpose, and makes the hub driver invoke the callback at the proper time. The patch also changes a couple of names; "hub_tt_kevent" and "tt.kevent" now look rather antiquated. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 16 6月, 2009 1 次提交
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由 Sarah Sharp 提交于
Add USB 3.0 root hub descriptors. This is a kludge because I reused the old USB 2.0 descriptors, instead of using the new USB 3.0 hub descriptors with endpoint companion descriptors and other descriptors. I did this because I wasn't ready to add USB 3.0 hub changes to khubd. For now, a USB 3.0 roothub looks like a USB 2.0 roothub, with a higher speed. USB 3.0 hubs have no transaction translator (TT). Make USB core debugging handle super speed ports. Signed-off-by: NSarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 25 4月, 2008 2 次提交
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由 Inaky Perez-Gonzalez 提交于
We need to be able to call ep0_reinit() [renamed to usb_ep0_reinit()] from the WUSB security code. The reason is that when we authenticate the device, it's address changes (from having bit 7 set to having it cleared). Thus, we need to signal the USB stack to reinitialize EP0, so the status with the previous address kept at the HCD layer is cleared and properly reinitialized. Signed-off-by: NInaky Perez-Gonzalez <inaky@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 David Brownell 提交于
There's a new PM-related change notice for the USB 2.0 specification called "Link Power Management" (LPM). It defines a new "L1 Suspend" state which resembles the current (L2) suspend state, except that it can be entered and exited much more quickly. It should thus be more useful for runtime PM, even though it doesn't mandate reduced power draw from VBUS. This patch provides the relevant #defines for usbcore. Actually implementing these mechanisms requires host silicon that can generate new USB packets, plus hubs handling some new requests and peripherals which understand the new packets. Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 02 2月, 2008 1 次提交
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由 Greg Kroah-Hartman 提交于
Fixes a number of coding style issues in the USB internal header files. Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 02 12月, 2006 2 次提交
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由 Alan Stern 提交于
This patch (as809b) moves the declaration of the hub driver's private data structure from hub.h into the hub.c source file. Lots of other files import hub.h; they have no need to know about the details of the hub driver's private data. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 inaky@linux.intel.com 提交于
Current Wireless USB host hardware (Intel i1480 for example) allows up to 22 devices to connect, thus bringing up the max number of children in the WUSB Host Controller to 22 'fake' ports. Upcoming hardware might raise that limit. Makes almost no difference to go to 31, as the bit arrays are byte-aligned (plus an extra bit in general), so 22 bits fit in 4 bytes as 31 do. As well, the only other array that depends on USB_MAXCHILDREN is 'struct usb_hub->indicator'. By declaring it 'u8' instead of 'enum hub_led_mode', we reduce the size of each entry from 4 bytes (in i386) to 1, which will add as we when are doubling USB_MAXCHILDREN (with 16 the size of that array is 64 bytes, with 31 would be 128; by using u8 that goes down to 31 bytes). Signed-off-by: NInaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 22 11月, 2006 1 次提交
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由 David Howells 提交于
Fix up for make allyesconfig. Signed-Off-By: NDavid Howells <dhowells@redhat.com>
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- 28 9月, 2006 1 次提交
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由 Alan Stern 提交于
We don't want khubd to start interfering in the device-resume process merely because the PORT_STATUS_C_SUSPEND feature happens to be set. Ports need to be marked as busy while a resume is taking place. In addition, so long as ports are marked as busy, khubd won't be able to clear their various status-change features. On an interrupt-driven root hub this could lead to an interrupt storm. Root hub IRQs should not be re-enabled until the busy_bits value is equal to 0. This patch (as765) fixes these two potential problems. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 05 1月, 2006 1 次提交
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由 Alan Stern 提交于
This patch (as609) changes the way we keep track of power budgeting for USB hubs and devices, and it updates the choose_configuration routine to take this information into account. (This is something we should have been doing all along.) A new field in struct usb_device holds the amount of bus current available from the upstream port, and the usb_hub structure keeps track of the current available for each downstream port. Two new rules for configuration selection are added: Don't select a self-powered configuration when only bus power is available. Don't select a configuration requiring more bus power than is available. However the first rule is #if-ed out, because I found that the internal hub in my HP USB keyboard claims that its only configuration is self-powered. The rule would prevent the configuration from being chosen, leaving the hub & keyboard unconfigured. Since similar descriptor errors may turn out to be fairly common, it seemed wise not to include a rule that would break automatic configuration unnecessarily for such devices. The second rule may also trigger unnecessarily, although this should be less common. More likely it will annoy people by sometimes failing to accept configurations that should never have been chosen in the first place. The patch also changes usbcore's reaction when no configuration is suitable. Instead of raising an error and rejecting the device, now the core will simply leave the device unconfigured. People can always work around such problems by installing configurations manually through sysfs. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 29 10月, 2005 1 次提交
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由 Greg Kroah-Hartman 提交于
Also has the nice benefit of making sparc alignment issues go away. Thanks to David Miller for pointing out the problems here. Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de> drivers/usb/core/hub.c | 22 ++++++++++++---------- drivers/usb/core/hub.h | 2 +- 2 files changed, 13 insertions(+), 11 deletions(-)
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- 09 9月, 2005 1 次提交
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由 david-b@pacbell.net 提交于
This adds think_time to the usb_tt struct and sets it appropriately (measured in ns); this can help us implement better split transaction scheduling. Signed-off-by: NDan Streetman <ddstreet@ieee.org> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 28 6月, 2005 1 次提交
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由 Alan Stern 提交于
This patch removes the hub_set_power_budget routine, which was used by a couple of HCDs to indicate that the root hub was running on battery power. In its place is a new field added to struct usb_hcd, which HCDs can set before the root hub is registered. Special-case code in the hub driver knows to look at this field when configuring a root hub. Signed-off-by: NAlan Stern <stern@rowland.harvard.edu> Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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