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path: root/drivers/usb/host
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2013-03-25USB: EHCI: changes related to qh_refresh()Alan Stern
This patch (as1638) makes several changes to the ehci-hcd driver, all related to the qh_refresh() function. This function must be called whenever an idle QH gets linked back into either the async or the periodic schedule. Change a BUG_ON() in the qh_update routine to a WARN_ON(). Since this code runs in atomic context, a BUG_ON() would immediately freeze the whole system. Remove two unneeded calls to qh_refresh(), one when a QH is initialized and one when a QH becomes idle. Adjust the adjacent comments accordingly. Move the qh_refresh() and qh_link_periodic() calls for new interrupt URBs to after the new TDs have been added. As a result of the previous two changes, qh_refresh() is never called when the qtd_list is empty. The corresponding check in qh_refresh() can be removed, along with an indentation level. These changes should not cause any alteration of behavior. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25xhci: Don't warn on empty ring for suspended devices.Sarah Sharp
When a device attached to the roothub is suspended, the endpoint rings are stopped. The host may generate a completion event with the completion code set to 'Stopped' or 'Stopped Invalid' when the ring is halted. The current xHCI code prints a warning in that case, which can be really annoying if the USB device is coming into and out of suspend. Remove the unnecessary warning. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Stephen Hemminger <stephen@networkplumber.org>
2013-03-25usb: xhci: Fix TRB transfer length macro used for Event TRB.Vivek Gautam
Use proper macro while extracting TRB transfer length from Transfer event TRBs. Adding a macro EVENT_TRB_LEN (bits 0:23) for the same, and use it instead of TRB_LEN (bits 0:16) in case of event TRBs. This patch should be backported to kernels as old as 2.6.31, that contain the commit b10de142119a676552df3f0d2e3a9d647036c26a "USB: xhci: Bulk transfer support". This patch will have issues applying to older kernels. Signed-off-by: Vivek gautam <gautam.vivek@samsung.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@vger.kernel.org
2013-03-25usb: add find_raw_port_number callback to struct hc_driver()Lan Tianyu
xhci driver divides the root hub into two logical hubs which work respectively for usb 2.0 and usb 3.0 devices. They are independent devices in the usb core. But in the ACPI table, it's one device node and all usb2.0 and usb3.0 ports are under it. Binding usb port with its acpi node needs the raw port number which is reflected in the xhci extended capabilities table. This patch is to add find_raw_port_number callback to struct hc_driver(), fill it with xhci_find_raw_port_number() which will return raw port number and add a wrap usb_hcd_find_raw_port_number(). Otherwise, refactor xhci_find_real_port_number(). Using xhci_find_raw_port_number() to get real index in the HW port status registers instead of scanning through the xHCI roothub port array. This can help to speed up. All addresses in xhci->usb2_ports and xhci->usb3_ports array are kown good ports and don't include following bad ports in the extended capabilities talbe. (1) root port that doesn't have an entry (2) root port with unknown speed (3) root port that is listed twice and with different speeds. So xhci_find_raw_port_number() will only return port num of good ones and never touch bad ports above. Signed-off-by: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-03-25usb: xhci: fix build warningPeter Chen
/home/b29397/work/code/git/linus/linux-2.6/drivers/usb/host/xhci-ring.c: In function ‘handle_port_status’: /home/b29397/work/code/git/linus/linux-2.6/drivers/usb/host/xhci-ring.c:1580: warning: ‘hcd’ may be used uninitialized in this function Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-03-21USB: EHCI: fix up incorrect merge resolutionAlan Stern
This patch (as1671) fixes up an incorrect resolution of a merge conflict between Greg KH's usb-linus branch and his usb-next branch. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-21usb: host: ehci-tegra: fix PHY error handlingFelipe Balbi
PHY layer no longer returns NULL, we must switch from IS_ERR_OR_NULL() to IS_ERR(). Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-20Merge branch 'usb-linus' into usb-nextGreg Kroah-Hartman
This is to pick up the fixes in that branch, and let Alan fix the merge error in drivers/usb/host/ehci-timer.c better than I just did (as I know I messed it up...) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-20USB: EHCI: fix regression in QH unlinkingAlan Stern
This patch (as1670) fixes a regression caused by commit 6402c796d3b4205d3d7296157956c5100a05d7d6 (USB: EHCI: work around silicon bug in Intel's EHCI controllers). The workaround goes through two IAA cycles for each QH being unlinked. During the first cycle, the QH is not added to the async_iaa list (because it isn't fully gone from the hardware yet), which means that list will be empty. Unfortunately, I forgot to update the IAA watchdog timer routine. It thinks that an empty async_iaa list means the timer expiration was an error, which isn't true any more. This problem didn't show up during initial testing because the controllers being tested all had working IAA interrupts. But not all controllers do, and when the watchdog timer expires, the empty-list check prevents the second IAA cycle from starting. As a result, URB unlinks never complete. The check needs to be removed. Among the symptoms of the regression are processes stuck in D wait states and hangs during system shutdown. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: Stephen Warren <swarren@wwwdotorg.org> Reported-and-tested-by: Sven Joachim <svenjoac@gmx.de> Reported-by: Andreas Bombe <aeb@debian.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-20arm: tegra: fix Kconfig select clausesFelipe Balbi
USB_ULPI and USB_ULPI_VIEWPORT shouldn't really be selected directly by anyone, but since Tegra still needs some time before turning ulpi viewport into a proper PHY driver, we need to keep the selects in place. This patch just fixes the conditional select so that it will continue to build after merging the latest PHY layer changes. Acked-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: ehci-s5p: Use devm for requesting ehci_vbus_gpioDoug Anderson
The ehci_vbus_gpio is requested but never freed. This can cause problems with deferred probes and would cause problems if s5p_ehci_remove was ever called. Use devm to fix this. Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Jingoo Han <jg1.han@samsung.com> Tested-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-18USB: EHCI: don't turn on PORT_SUSPEND during port resumeAlan Stern
This patch (as1637) cleans up the way ehci-hcd handles end-of-resume port signalling. When the PORT_RESUME bit in the port's status and control register is cleared, we shouldn't be setting the PORT_SUSPEND bit at the same time. Not doing this doesn't seem to have hurt so far, but we might as well do the right thing. Also, the patch replaces an estimated value for what the port status should be following a resume with the actual register value. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-18USB: EHCI: reorganize ehci_iaa_watchdog()Alan Stern
This patch (as1635) rearranges the control-flow logic in ehci_iaa_watchdog() slightly to agree better with the comments. It also changes a verbose-debug message to a regular debug message. Expiration of the IAA watchdog is an unusual event and can lead to problems; we need to know about it if it happens during debugging. It should not be necessary to set a "verbose" compilation option. No behavioral changes other than the debug message. Lots of apparent changes to the source text, though, because the indentation level was decreased. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-18USB: EHCI: improve use of per-port status-change bitsAlan Stern
This patch (as1634) simplifies some of the code associated with the per-port change bits added in EHCI-1.1, and in particular it fixes a bug in the logic of ehci_hub_status_data(). Even if the change bit doesn't indicate anything happened on a particular port, we still have to notify the core about changes to the suspend or reset status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-18USB: EHCI: decrease schedule-status poll timeoutAlan Stern
This patch (as1657) decreases the timeout used by ehci-hcd for polling the async and periodic schedule statuses. The timeout is currently set to 20 ms, which is much too high. Controllers should always update the schedule status within one or two ms of being told to do so; if they don't then something is wrong. Furthermore, bug reports have shown that sometimes controllers (particularly those made by VIA) don't update the status bit at all, even when the schedule does change state. When this happens, polling for 20 ms would cause an unnecessarily long delay. The delay is reduced to somewhere between 2 and 4 ms, depending on the slop allowed by the kernel's high-res timers. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-18USB: xhci - fix bit definitions for IMAN registerDmitry Torokhov
According to XHCI specification (5.5.2.1) the IP is bit 0 and IE is bit 1 of IMAN register. Previously their definitions were reversed. Even though there are no ill effects being observed from the swapped definitions (because IMAN_IP is RW1C and in legacy PCI case we come in with it already set to 1 so it was clearing itself even though we were setting IMAN_IE instead of IMAN_IP), we should still correct the values. This patch should be backported to kernels as old as 2.6.36, that contain the commit 4e833c0b87a30798e67f06120cecebef6ee9644c "xhci: don't re-enable IE constantly". Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@vger.kernel.org
2013-03-18usb: host: ohci-exynos: fix PHY error handlingFelipe Balbi
PHY layer no longer returns NULL. We must switch from IS_ERR_OR_NULL() to IS_ERR(). Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: host: ehci-s5p: fix PHY error handlingFelipe Balbi
PHY layer no longer returns NULL. We must switch from IS_ERR_OR_NULL() to IS_ERR(). Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: host: ehci-mv: fix PHY error handlingFelipe Balbi
PHY layer no longer returns NULL. We must switch from IS_ERR_OR_NULL() to IS_ERR(). Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: host: ehci-msm: fix PHY error handlingFelipe Balbi
PHY layer no longer returns NULL. We must switch from IS_ERR_OR_NULL() to IS_ERR(). Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: phy: remove CONFIG_USB_OTG_UTILSFelipe Balbi
there are no more users of CONFIG_USB_OTG_UTILS left in tree, we can remove it just fine. [ kishon@ti.com : fixed a linking error due to original patch forgetting to change drivers/usb/Makefile ] Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: ehci: tegra: check against CONFIG_USB_PHYFelipe Balbi
CONFIG_USB_OTG_UTILS will be removed very soon, so we should check CONFIG_USB_PHY instead. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-18usb: ehci: marvel: check against CONFIG_USB_PHYFelipe Balbi
CONFIG_USB_OTG_UTILS will be removed very soon, so we should check CONFIG_USB_PHY instead. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-03-15drivers/usb: use module_pcmcia_driver() in pcmcia driversH Hartley Sweeten
Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: EHCI: fix regression during bus resumeAlan Stern
This patch (as1663) fixes a regression caused by commit 6e0c3339a6f19d748f16091d0a05adeb1e1f822b (USB: EHCI: unlink one async QH at a time). In order to avoid keeping multiple QHs in an unusable intermediate state, that commit changed unlink_empty_async() so that it unlinks only one empty QH at a time. However, when the EHCI root hub is suspended, _all_ async QHs need to be unlinked. ehci_bus_suspend() used to do this by calling unlink_empty_async(), but now this only unlinks one of the QHs, not all of them. The symptom is that when the root hub is resumed, USB communications don't work for some period of time. This is because ehci-hcd doesn't realize it needs to restart the async schedule; it assumes that because some QHs are already on the schedule, the schedule must be running. The easiest way to fix the problem is add a new function that unlinks all the async QHs when the root hub is suspended. This patch should be applied to all kernels that have the 6e0c3339a6f1 commit. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: Adrian Bassett <adrian.bassett@hotmail.co.uk> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: xhci: correctly enable interruptsHannes Reinecke
xhci has its own interrupt enabling routine, which will try to use MSI-X/MSI if present. So the usb core shouldn't try to enable legacy interrupts; on some machines the xhci legacy IRQ setting is invalid. v3: Be careful to not break XHCI_BROKEN_MSI workaround (by trenn) Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Oliver Neukum <oneukum@suse.de> Cc: Thomas Renninger <trenn@suse.de> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Frederik Himpe <fhimpe@vub.ac.be> Cc: David Haerdeman <david@hardeman.nu> Cc: Alan Stern <stern@rowland.harvard.edu> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Reviewed-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Hannes Reinecke <hare@suse.de> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Get rid of omap_ehci_init()Roger Quadros
As it does almost nothing, get rid of omap_ehci_init() and move the ehci->caps initialization part into probe(). Also remove the outdated TODO list from header. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Fix detection in HSIC modeRoger Quadros
Move PHY initialization until after EHCI initialization is complete, instead of initializing the PHYs first, shutting them down again, and then initializing them a second time. This fixes HSIC device detection. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Try to get PHY even if not in PHY modeRoger Quadros
Even when not in PHY mode, the USB device on the port (e.g. HUB) might need resources like RESET which can be modelled as a PHY device. So try to get the PHY device in any case. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Add device tree support and binding informationRoger Quadros
Allows the OMAP EHCI controller to be specified via device tree. Signed-off-by: Roger Quadros <rogerq@ti.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ohci-omap3: Add device tree support and binding informationRoger Quadros
Allows the OHCI controller found in OMAP3 and later chips to be specified via device tree. Signed-off-by: Roger Quadros <rogerq@ti.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ohci-omap3: Get platform resources by index rather than by nameRoger Quadros
Since there is only one resource per type we don't really need to use resource name to obtain it. This also also makes it easier for device tree adaptation. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Get platform resources by index rather than by nameRoger Quadros
Since there is only one resource per type we don't really need to use resource name to obtain it. This also also makes it easier for device tree adaptation. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Select NOP USB transceiver driverRoger Quadros
In PHY mode we need to have the nop-usb-xceiv transceiver driver to operate, so select it in Kconfig. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Remove PHY regulator handling codeRoger Quadros
PHY regulator handling must be done in the PHY driver Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Remove PHY reset handling codeRoger Quadros
Reset GPIO handling for the PHY must be done in the PHY driver. We use the PHY helpers instead to reset the PHY. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Use PHY APIs to get the PHY device and put it out of suspendRoger Quadros
For each port that is in PHY mode we obtain a PHY device using the USB PHY library and put it out of suspend. It is up to platform code to associate the PHY to the controller's port and it is up to the PHY driver to manage the PHY's resources. Also remove weird spacing around declarations we come across. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: ehci-omap: Use devm_ioremap_resource()Roger Quadros
Make use of devm_ioremap_resource() and correct comment. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: EHCI: split ehci-omap out to a separate driverAlan Stern
This patch (as1645) converts ehci-omap over to the new "ehci-hcd is a library" approach, so that it can coexist peacefully with other EHCI platform drivers and can make use of the private area allocated at the end of struct ehci_hcd. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15usb: Use resource_size functionPaul Vlase
Signed-off-by: Paul Vlase <vlase.paul@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15USB: remove incorrect __exit markupsDmitry Torokhov
Even if bus is not hot-pluggable, the devices can be unbound from the driver via sysfs, so we should not be using __exit annotations on remove() methods. The only exception is drivers registered with platform_driver_probe() which specifically disables sysfs bind/unbind attributes. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15usb: host: ehci-mxc: Remove dev_info on probeFabio Estevam
It is not very useful to indicate the the driver is about to be probed. Quoting Alan Stern [1]: "Plenty of drivers don't include any message like this at all. You might as well get rid of it entirely." Remove such dev_info(). [1] http://marc.info/?l=linux-usb&m=136138896132433&w=2 Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15usb: host: ehci-mxc: Remove unneeded header fileFabio Estevam
Since commit c0304996b (USB: ehci-mxc: remove Efika MX-specific CHRGVBUS hack) there is no need to include <asm/mach-types.h>, so remove it. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-05USB: EHCI: don't check DMA values in QH overlaysAlan Stern
This patch (as1661) fixes a rather obscure bug in ehci-hcd. In a couple of places, the driver compares the DMA address stored in a QH's overlay region with the address of a particular qTD, in order to see whether that qTD is the one currently being processed by the hardware. (If it is then the status in the QH's overlay region is more up-to-date than the status in the qTD, and if it isn't then the overlay's value needs to be adjusted when the QH is added back to the active schedule.) However, DMA address in the overlay region isn't always valid. It sometimes will contain a stale value, which may happen by coincidence to be equal to a qTD's DMA address. Instead of checking the DMA address, we should check whether the overlay region is active and valid. The patch tests the ACTIVE bit in the overlay, and clears this bit when the overlay becomes invalid (which happens when the currently-executing URB is unlinked). This is the second part of a fix for the regression reported at: https://bugs.launchpad.net/bugs/1088733 Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Joseph Salisbury <joseph.salisbury@canonical.com> Reported-and-tested-by: Stephen Thirlwall <sdt@dr.com> CC: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-05USB: EHCI: work around silicon bug in Intel's EHCI controllersAlan Stern
This patch (as1660) works around a hardware problem present in some (if not all) Intel EHCI controllers. After a QH has been unlinked from the async schedule and the corresponding IAA interrupt has occurred, the controller is not supposed access the QH and its qTDs. There certainly shouldn't be any more DMA writes to those structures. Nevertheless, Intel's controllers have been observed to perform a final writeback to the QH's overlay region and to the most recent qTD. For more information and a test program to determine whether this problem is present in a particular controller, see http://marc.info/?l=linux-usb&m=135492071812265&w=2 http://marc.info/?l=linux-usb&m=136182570800963&w=2 This patch works around the problem by always waiting for two IAA cycles when unlinking an async QH. The extra IAA delay gives the controller time to perform its final writeback. Surprisingly enough, the effects of this silicon bug have gone undetected until quite recently. More through luck than anything else, it hasn't caused any apparent problems. However, it does interact badly with the path that follows this one, so it needs to be addressed. This is the first part of a fix for the regression reported at: https://bugs.launchpad.net/bugs/1088733 Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Stephen Thirlwall <sdt@dr.com> CC: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-03Merge tag 'usb-3.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patch revert from Greg Kroah-Hartman: "Here is one remaining USB patch for 3.9-rc1, it reverts a 3.8 patch that has caused a lot of regressions for some VIA EHCI controllers." * tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: USB: EHCI: revert "remove ASS/PSS polling timeout"
2013-02-26USB: EHCI: revert "remove ASS/PSS polling timeout"Alan Stern
This patch (as1649) reverts commit 55bcdce8a8228223ec4d17d8ded8134ed265d2c5 (USB: EHCI: remove ASS/PSS polling timeout). That commit was written under the assumption that some controllers may take a very long time to turn off their async and periodic schedules. It now appears that in fact the schedules do get turned off reasonably quickly, but some controllers occasionally leave the schedules' status bits turned on and consequently ehci-hcd can't tell that the schedules are off. VIA controllers in particular have this problem. ehci-hcd tells the hardware to turn off the async schedule, the schedule does get turned off, but the status bit remains on. Since the EHCI spec requires that the schedules not be re-enabled until the previous disable has taken effect, with an unlimited timeout the async schedule never gets turned back on. The resulting symptom is that the system is unable to communicate with USB devices. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: Ronald <ronald645@gmail.com> Reported-and-tested-by: Paul Hartman <paul.hartman@gmail.com> Reported-and-tested-by: Dieter Nützel <dieter@nuetzel-hh.de> Reported-and-tested-by: Jean Delvare <khali@linux-fr.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-02-24Merge tag 'mfd-3.9-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 Pull MFS updates from Samuel Ortiz: "This is the MFD pull request for the 3.9 merge window. No new drivers this time, but a bunch of fairly big cleanups: - Roger Quadros worked on a OMAP USBHS and TLL platform data consolidation, OMAP5 support and clock management code cleanup. - The first step of a major sync for the ab8500 driver from Lee Jones. In particular, the debugfs and the sysct interfaces got extended and improved. - Peter Ujfalusi sent a nice patchset for cleaning and fixing the twl-core driver, with a much needed module id lookup code improvement. - The regular wm5102 and arizona cleanups and fixes from Mark Brown. - Laxman Dewangan extended the palmas APIs in order to implement the palmas GPIO and rt drivers. - Laxman also added DT support for the tps65090 driver. - The Intel SCH and ICH drivers got a couple fixes from Aaron Sierra and Darren Hart. - Linus Walleij patchset for the ab8500 driver allowed ab8500 and ab9540 based devices to switch to the new abx500 pin-ctrl driver. - The max8925 now has device tree and irqdomain support thanks to Qing Xu. - The recently added rtsx driver got a few cleanups and fixes for a better card detection code path and now also supports the RTS5227 chipset, thanks to Wei Wang and Roger Tseng." * tag 'mfd-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (109 commits) mfd: lpc_ich: Use devres API to allocate private data mfd: lpc_ich: Add Device IDs for Intel Wellsburg PCH mfd: lpc_sch: Accomodate partial population of the MFD devices mfd: da9052-i2c: Staticize da9052_i2c_fix() mfd: syscon: Fix sparse warning mfd: twl-core: Fix kernel panic on boot mfd: rtsx: Fix issue that booting OS with SD card inserted mfd: ab8500: Fix compile error mfd: Add missing GENERIC_HARDIRQS dependecies Documentation: Add docs for max8925 dt mfd: max8925: Add dts mfd: max8925: Support dt for backlight mfd: max8925: Fix onkey driver irq base mfd: max8925: Fix mfd device register failure mfd: max8925: Add irqdomain for dt mfd: vexpress: Allow vexpress-sysreg to self-initialise mfd: rtsx: Support RTS5227 mfd: rtsx: Implement driving adjustment to device-dependent callbacks mfd: vexpress: Add pseudo-GPIO based LEDs mfd: ab8500: Rename ab8500 to abx500 for hwmon driver ...
2013-02-21Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds
Pull ARM SoC-specific updates from Arnd Bergmann: "This is a larger set of new functionality for the existing SoC families, including: - vt8500 gains support for new CPU cores, notably the Cortex-A9 based wm8850 - prima2 gains support for the "marco" SoC family, its SMP based cousin - tegra gains support for the new Tegra4 (Tegra114) family - socfpga now supports a newer version of the hardware including SMP - i.mx31 and bcm2835 are now using DT probing for their clocks - lots of updates for sh-mobile - OMAP updates for clocks, power management and USB - i.mx6q and tegra now support cpuidle - kirkwood now supports PCIe hot plugging - tegra clock support is updated - tegra USB PHY probing gets implemented diffently" * tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (148 commits) ARM: prima2: remove duplicate v7_invalidate_l1 ARM: shmobile: r8a7779: Correct TMU clock support again ARM: prima2: fix __init section for cpu hotplug ARM: OMAP: Consolidate OMAP USB-HS platform data (part 3/3) ARM: OMAP: Consolidate OMAP USB-HS platform data (part 1/3) arm: socfpga: Add SMP support for actual socfpga harware arm: Add v7_invalidate_l1 to cache-v7.S arm: socfpga: Add entries to enable make dtbs socfpga arm: socfpga: Add new device tree source for actual socfpga HW ARM: tegra: sort Kconfig selects for Tegra114 ARM: tegra: enable ARCH_REQUIRE_GPIOLIB for Tegra114 ARM: tegra: Fix build error w/ ARCH_TEGRA_114_SOC w/o ARCH_TEGRA_3x_SOC ARM: tegra: Fix build error for gic update ARM: tegra: remove empty tegra_smp_init_cpus() ARM: shmobile: Register ARM architected timer ARM: MARCO: fix the build issue due to gic-vic-to-irqchip move ARM: shmobile: r8a7779: Correct TMU clock support ARM: mxs_defconfig: Select CONFIG_DEVTMPFS_MOUNT ARM: mxs: decrease mxs_clockevent_device.min_delta_ns to 2 clock cycles ARM: mxs: use apbx bus clock to drive the timers on timrotv2 ...
2013-02-21Merge tag 'usb-3.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patches from Greg Kroah-Hartman: "Here's the big USB merge for 3.9-rc1 Nothing major, lots of gadget fixes, and of course, xhci stuff. All of this has been in linux-next for a while, with the exception of the last 3 patches, which were reverts of patches in the tree that caused problems, they went in yesterday." * tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (190 commits) Revert "USB: EHCI: make ehci-vt8500 a separate driver" Revert "USB: EHCI: make ehci-orion a separate driver" Revert "USB: update host controller Kconfig entries" USB: update host controller Kconfig entries USB: EHCI: make ehci-orion a separate driver USB: EHCI: make ehci-vt8500 a separate driver USB: usb-storage: unusual_devs update for Super TOP SATA bridge USB: ehci-omap: Fix autoloading of module USB: ehci-omap: Don't free gpios that we didn't request USB: option: add Huawei "ACM" devices using protocol = vendor USB: serial: fix null-pointer dereferences on disconnect USB: option: add Yota / Megafon M100-1 4g modem drivers/usb: add missing GENERIC_HARDIRQS dependencies USB: storage: properly handle the endian issues of idProduct testusb: remove all mentions of 'usbfs' usb: gadget: imx_udc: make it depend on BROKEN usb: omap_control_usb: fix compile warning ARM: OMAP: USB: Add phy binding information ARM: OMAP2: MUSB: Specify omap4 has mailbox ARM: OMAP: devices: create device for usb part of control module ...