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path: root/src/drivers/usb
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* [init] Show startup and shutdown function names in debug messagesMichael Brown2019-01-252-0/+2
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Consume event TRB before reporting completion to USB coreMichael Brown2018-02-191-4/+4
| | | | | | | | | | | | | | | | Reporting a completion via usb_complete() will pass control outside the scope of xhci.c, and could potentially result in a further call to xhci_event_poll() before returning from usb_complete(). Since we currently update the event consumer counter only after calling usb_complete(), this can result in duplicate completions and consequent corruption of the submission TRB ring structures. Fix by updating the event ring consumer counter before passing control to usb_complete(). Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com> Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Assume an invalid PSI table if any invalid PSI value is observedMichael Brown2018-01-291-23/+30
| | | | | | | | | | | Invalid protocol speed ID tables appear to be increasingly common in the wild, to the point that it is infeasible to apply an explicit XHCI_BAD_PSIV flag for each offending PCI device ID. Fix by assuming an invalid PSI table as soon as any invalid value is reported by the hardware. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Allow for USB network devices with no interrupt endpointMichael Brown2017-06-141-13/+21
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Avoid accessing beyond end of endpoint context arrayMichael Brown2017-03-211-1/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Add extra debugging informationMichael Brown2016-02-051-2/+73
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Allow USB endpoints to specify a reserved header length for refillsMichael Brown2016-01-192-2/+2
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add support for numeric keypad on USB keyboardsMichael Brown2016-01-062-7/+100
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Ensure that zero-length packets are not part of a TRB chainMichael Brown2015-12-071-0/+6
| | | | | | | | | | | | Some xHCI controllers (such as qemu's emulated xHCI controller) do not correctly handle zero-length packets that are part of a TRB chain. The zero-length TRB ends up being squashed and does not result in a zero-length packet as seen by the device. Work around this problem by marking the zero-length packet as belonging to a separate transfer descriptor. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Allow additional settling time for out-of-spec hubsMichael Brown2015-12-072-0/+19
| | | | | | | | | | | | | Some hubs (e.g. the Avocent Corp. Virtual Hub on a Lenovo x3550 Integrated Management Module) have been observed to require more than the standard 200ms for ports to stabilise, with the result that devices appear to disconnect and immediately reconnect during the initial bus enumeration. Work around this problem by allowing specific hubs an extra 500ms of settling time. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Record USB device speed separately from current port speedMichael Brown2015-12-073-5/+4Star
| | | | | | | | | | | | | Record the speed of a USB device based on the port's speed at the time that the device was enabled. This allows us to remember the device's speed even after the device has been disconnected (and so the port's current speed has changed). In particular, this allows us to correctly identify the transaction translator for a low-speed or full-speed device after the device has been disconnected. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Use port->disconnected to check for disconnected devicesMichael Brown2015-12-071-1/+2
| | | | | | | | | | | | | The usb_message() and usb_stream() functions currently check for port->speed==USB_SPEED_NONE to determine whether or not a device has been unplugged. This test will give a false negative result if a new device has been plugged in before the hotplug mechanism has finished handling the removal of the old device. Fix by checking instead the port->disconnected flag, which is now cleared only after completing the removal of the old device. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Allow for wildcard USB class IDsMichael Brown2015-09-143-24/+8Star
| | | | | | | | Make the class ID a property of the USB driver (rather than a property of the USB device ID), and allow USB drivers to specify a wildcard ID for any of the three component IDs (class, subclass, or protocol). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Select preferred USB device configuration based on driver scoreMichael Brown2015-09-144-12/+12
| | | | | | | | | | | Generate a score for each possible USB device configuration based on the available driver support, and select the configuration with the highest score. This will allow us to prefer ECM over RNDIS (for devices which support both) and will allow us to meaningfully select a configuration even when we have drivers available for all functions (e.g. when exposing unused functions via EFI_USB_IO_PROTOCOL). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [efi] Provide efi_devpath_len()Michael Brown2015-09-131-3/+2Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Support arbitrarily large transfersMichael Brown2015-09-131-11/+45
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Support arbitrarily large transfersMichael Brown2015-09-131-14/+49
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Do not treat zero-length NULL pointers as unreachableMichael Brown2015-09-131-0/+2
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Generalise zero-length packet generation logicMichael Brown2015-09-134-16/+11Star
| | | | | | | | The decision on whether or not a zero-length packet needs to be transmitted is independent of the host controller and belongs in the USB core. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [efi] Add a USB host controller driver based on EFI_USB_IO_PROTOCOLMichael Brown2015-09-072-0/+1875
| | | | | | | | | | | | | | | | | | | | | Allow iPXE to coexist with other USB device drivers, by attaching to the EFI_USB_IO_PROTOCOL instances provided by the UEFI platform firmware. The EFI_USB_IO_PROTOCOL is an unsurprisingly badly designed abstraction of a USB device. The poor design choices intrinsic in the UEFI specification prevent efficient operation as a network device, with the result that devices operated using the EFI_USB_IO_PROTOCOL operate approximately two orders of magnitude slower than devices operated using our native EHCI or xHCI host controller drivers. Since the performance is so abysmally slow, and since the underlying problems are due to fundamental architectural mistakes in the UEFI specification, support for the EFI_USB_IO_PROTOCOL host controller driver is left as disabled by default. Users are advised to use the native iPXE host controller drivers instead. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Ignore invalid protocol speed ID values on Intel Skylake platformsMichael Brown2015-06-182-3/+9
| | | | | | | | | | | | | | | Some Intel Skylake platforms (observed on a prototype Lenovo ThinkPad) report the list of available USB3 protocol speed ID values as {1,2,3} but then report a port's speed using ID value 4. The value 4 happens to be the default value for SuperSpeed (when no protocol speed ID value list is explicitly defined), and the hardware seems to function correctly if we simply ignore its protocol speed ID table and assume that it uses the default values. Fix by adding a "broken PSI values" quirk for this controller. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Record device-specific quirks in xHCI device structureMichael Brown2015-06-182-3/+6
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Fix comparison of signed and unsigned integersMichael Brown2015-06-011-1/+1
| | | | | | | | gcc 4.8.2 fails to report this erroneous comparison unless assertions are enabled. Reported-by: Mary-Ann Johnson <MaryAnn.Johnson@displaylink.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Fix length of allocated slot arrayMichael Brown2015-06-011-2/+3
| | | | | | | | | The xHCI slot ID is one-based, not zero-based. Fix the length of the xhci->slot[] array to account for this, and add assertions to check that the hardware returns a valid slot ID in response to the Enable Slot command. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add basic support for USB keyboardsMichael Brown2015-05-122-0/+663
| | | | | | | | | | | | When USB network card drivers are used, the BIOS' legacy USB capability is necessarily disabled since there is no way to share the host controller between the BIOS and iPXE. This currently results in USB keyboards becoming non-functional in USB-enabled builds of iPXE. Fix by adding basic support for USB keyboards, enabled by default in iPXE builds which include USB support. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add generic USB human interface device (HID) frameworkMichael Brown2015-05-121-0/+151
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add USB_INTERRUPT_OUT internal typeMichael Brown2015-05-112-2/+2
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uhci] Use meaningful device names in debug messagesMichael Brown2015-05-102-15/+21
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Use meaningful device names in debug messagesMichael Brown2015-05-102-43/+52
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Use meaningful device names in debug messagesMichael Brown2015-05-102-119/+124
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uhci] Add support for UHCI host controllersMichael Brown2015-05-102-0/+1921
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Allow UHCI/OHCI controllers to locate the EHCI companion controllerMichael Brown2015-05-092-0/+28
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Poll child companion controllers after disowning portMichael Brown2015-05-092-0/+59
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Detect missed disconnectionsMichael Brown2015-05-083-41/+60
| | | | | | | | | | | | | | | | | | | | | The USB core will currently fail to detect disconnections if a new device has attached by the time the port is examined in usb_hotplug(). Fix by recording the fact that a disconnection has taken place whenever the "connection status changed" (CSC) bit is observed to be set. (Whether the change represents a disconnection or a reconnection, it indicates that the port has experienced some time of being disconnected.) Note that the time at which a disconnection can be detected varies by hub type. In particular: root hubs can observe the CSC bit when polling, and so will record the disconnection before calling usb_port_changed(), but USB hubs read the port status (and hence the CSC bit) only during the call to hub_speed(), long after the call to usb_port_changed(). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [pci] Provide PCI_CLASS() to calculate a scalar PCI class valueMichael Brown2015-05-082-4/+4
| | | | | | | | Rename PCI_CLASS() (which constructs a struct pci_class_id) to PCI_CLASS_ID(), and provide PCI_CLASS() as a macro which constructs the 24-bit scalar value of a PCI class code. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Include setup packet within I/O buffer for message transfersMichael Brown2015-05-013-37/+20Star
| | | | | | | | | | | | | | The USB API currently assumes that host controllers will have immediate data buffer space available in which to store the setup packet. This is true for xHCI, partially true for EHCI (which happens to have 12 bytes of padding in each transfer descriptor due to alignment requirements), and not true at all for UHCI. Include the setup packet within the I/O buffer passed to the host controller's message() method, thereby eliminating the requirement for host controllers to provide immediate data buffers. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Always reset root hub portsMichael Brown2015-04-131-7/+5Star
| | | | | | | | In theory USB3 ports do not require a reset to enable the port. Experimentation shows that this is sometimes required, particularly when rerouting ports from EHCI to xHCI and switching speeds. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Support USB1 devices attached via transaction translatorsMichael Brown2015-03-233-26/+125
| | | | | | | | | | | | | | | | | | | | xHCI provides a somewhat convoluted mechanism for specifying details of a transaction translator. Hubs must be marked as such in the device slot context. The only opportunity to do so is as part of a Configure Endpoint command, which can be executed only when opening the hub's interrupt endpoint. We add a mechanism for host controllers to intercept the opening of hub devices, providing xHCI with an opportunity to update the internal device slot structure for the corresponding USB device to indicate that the device is a hub. We then include the hub-specific details in the input context whenever any Configure Endpoint command is issued. When a device is opened, we record the device slot and port for its transaction translator (if any), and supply these as part of the Address Device command. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Support USB1 devices attached via transaction translatorsMichael Brown2015-03-232-11/+53
| | | | | | | | | | | | | | | Support low-speed and full-speed devices attached to a USB2 hub. Such devices use a transaction translator (TT) within the USB2 hub, which asynchronously initiates transactions on the lower-speed bus and returns the result via a split completion on the high-speed bus. We make the simplifying assumption that there will never be more than sixteen active interrupt endpoints behind a single transaction translator; this assumption allows us to schedule all periodic start splits in microframe 0 and all periodic split completions in microframes 2 and 3. (We do not handle isochronous endpoints.) Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add clear_tt() hub method to clear transaction translator bufferMichael Brown2015-03-234-2/+105
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Ring doorbell as part of endpoint resetMichael Brown2015-03-231-0/+3
| | | | | | | | | The endpoint may already have enqueued TRBs at the time that xhci_endpoint_reset() is called. Ring the doorbell to resume processing these TRBs immediately, rather than waiting until the next call to xhci_endpoint_message() or xhci_endpoint_stream(). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Fix USB timeouts to match specificationMichael Brown2015-03-181-2/+4
| | | | | | | | | | | | | | | Several of the USB timeouts were chosen on the principle of "pick an arbitrary but ridiculously large value, just to be safe". It turns out that some of the timeouts permitted by the USB specification are even larger: for example, control transactions are allowed to take up to five seconds to complete. Fix up these USB timeout values to match those found in the USB2 specification. Debugged-by: Robin Smidsrød <robin@smidsrod.no> Tested-by: Robin Smidsrød <robin@smidsrod.no> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ehci] Add support for EHCI host controllersMichael Brown2015-03-182-0/+2361
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Do not release ownership back to BIOS when booting an OSMichael Brown2015-03-181-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | xHCI (and EHCI) nominally provide a mechanism for releasing ownership of the host controller back to the BIOS, which can then potentially restore legacy USB keyboard functionality. This is a rarely used code path, since most operating systems claim ownership and never attempt to later return to the BIOS. On some systems (observed with a Lenovo X1 Carbon), this code path leads to obscure and interesting bugs: if the xHCI and EHCI controllers are both claimed and later released back to the BIOS, then a subsequent call to INT 16,0305 to set the keyboard repeat rate to a non-default value will lock the system. Obscure though this sequence of operations may sound, it is exactly what happens when using iPXE to boot a Linux kernel via a USB network card. There is old and probably unwanted code in Linux's arch/x86/boot/main.c which sets the keyboard repeat rate (with the accompanying comment "Set keyboard repeat rate (why?)"). When booting Linux via a USB network card on a Lenovo X1 Carbon, the system therefore locks up immediately after jumping to the kernel's entry point. Work around this problem by preventing the release of ownership back to the BIOS if it is known that we are shutting down to boot an OS. This should allow legacy USB keyboard functionality to be restored if the user chooses to exit iPXE, while avoiding the rarely used code paths (and corresponding BIOS bugs) if the user chooses instead to boot an OS. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Forcibly disable SMIs if BIOS fails to release ownershipMichael Brown2015-03-161-10/+10
| | | | | | | | If the BIOS fails to gracefully release ownership of the xHCI controller, we can forcibly claim it by disabling all SMIs via the USB legacy support control/status register. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [usb] Add the concept of a USB bus maximum transfer sizeMichael Brown2015-03-162-1/+4
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Undo PCH-specific quirk fixes when removing deviceMichael Brown2015-03-062-17/+51
| | | | | | | | Restore the original values of XUSB2PR and USB3PSSEN, in case we are booting an OS with no support for xHCI. Suggested-by: Dan Ellis <Dan.Ellis@displaylink.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Enable USB3 ports on Intel PCH8/PCH9 controllersMichael Brown2015-03-062-0/+55
| | | | | | | | | | Intel PCH controllers default to routing USB2 ports to EHCI rather than xHCI, and default to disabling SuperSpeed connections. Manipulate the PCI configuration space registers as necessary to reroute ports and enable SuperSpeed. Originally-fixed-by: Dan Ellis <Dan.Ellis@displaylink.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Relicense files under GPL2_OR_LATER_OR_UBDLMichael Brown2015-03-025-5/+17
| | | | | | | Relicense files for which I am the sole author (as identified by util/relicense.pl). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [xhci] Abort commands on timeoutMichael Brown2015-02-182-15/+82
| | | | | | | | | | | | When a command times out, abort it (via the Command Abort bit in the Command Ring Control Register) so that subsequent commands may execute as expected. This improves robustness when a device fails to respond to the Set Address command, since the subsequent Disable Slot command will now succeed. Signed-off-by: Michael Brown <mcb30@ipxe.org>
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