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path: root/drivers/thunderbolt/usb4.c
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2020-01-08thunderbolt: Fix xhci check in usb4_switch_setup()Mika Westerberg
The code tried to check whether xhci variable has ROUTER_CS_6_HCI bit set but since xhci type is bool and it already holds true or false based on that very bit, fix the check to use the variable directly. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: b04079837b20 ("thunderbolt: Add initial support for USB4") Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/r/20200108125317.36444-2-mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-18thunderbolt: Add support for USB 3.x tunnelsRajmohan Mani
USB4 added a capability to tunnel USB 3.x protocol over the USB4 fabric. USB4 device routers may include integrated SuperSpeed HUB or a function or both. USB tunneling follows PCIe so that the tunnel is created between the parent and the child router from USB3 downstream adapter port to USB3 upstream adapter port over a single USB4 link. This adds support for USB 3.x tunneling and also capability to discover existing USB 3.x tunnels (for example created by connection manager in boot firmware). Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/r/20191217123345.31850-9-mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-18thunderbolt: Add initial support for USB4Mika Westerberg
USB4 is the public specification based on Thunderbolt 3 protocol. There are some differences in register layouts and flows. In addition to PCIe and DP tunneling, USB4 supports tunneling of USB 3.x. USB4 is also backward compatible with Thunderbolt 3 (and older generations but the spec only talks about 3rd generation). USB4 compliant devices can be identified by checking USB4 version field in router configuration space. This patch adds initial support for USB4 compliant hosts and devices which enables following features provided by the existing functionality in the driver: - PCIe tunneling - Display Port tunneling - Host and device NVM firmware upgrade - P2P networking This brings the USB4 support to the same level that we already have for Thunderbolt 1, 2 and 3 devices. Note the spec talks about host and device "routers" but in the driver we still use term "switch" in most places. Both can be used interchangeably. Co-developed-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/r/20191217123345.31850-5-mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>