linux-toradex.git/drivers/thunderbolt/tb.c, branch v4.4.73

thunderbolt: Fix nontrivial endpoint devices.

2014-06-19T21:14:35+00:00

Fix issues observed with the Startech docking station:

Fix the type of the route parameter in tb_ctl_rx. It should be u64 and not
u8 (which only worked for short routes).

A thunderbolt cable contains two lanes. If both endpoints support it a
connection will be established on both lanes. Previously we tried to
scan below both "dual link ports". Use the information extracted from
the drom to only scan behind ports with lane_nr == 0.

Endpoints with more complex thunderbolt controllers have some of their
ports disabled (for example the NHI port or one of the HDMI/DP ports).
Accessing them results in an error so we now ignore ports which are
marked as disabled in the drom.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Add suspend/hibernate support

2014-06-19T21:13:00+00:00

We use _noirq since we have to restore the pci tunnels before the pci
core wakes the tunneled devices.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Add support for simple pci tunnels

2014-06-19T21:07:47+00:00

A pci downstream and pci upstream port can be connected through a
tunnel. To establish the tunnel we have to setup two unidirectional
paths between the two ports.

Right now we only support paths with two hops (i.e. no chaining) and at
most one pci device per thunderbolt device.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Handle hotplug events

2014-06-19T21:07:47+00:00

We receive a plug event callback whenever a thunderbolt device is added
or removed. This patch fills in the tb_handle_hotplug method and starts
reacting to these events by adding/removing switches from the hierarchy.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Scan for downstream switches

2014-06-19T21:07:47+00:00

Add utility methods tb_port_state and tb_wait_for_port. Add
tb_scan_switch which recursively checks for downstream switches.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Initialize root switch and ports

2014-06-19T21:07:08+00:00

This patch adds the structures tb_switch and tb_port as well as code to
initialize the root switch.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Add tb_regs.h

2014-06-19T21:07:07+00:00

Every thunderbolt device consists (logically) of a switch with multiple
ports. Every port contains up to four config regions (HOPS, PORT,
SWITCH, COUNTERS) which are used to configure the device.

The tb_regs.h file contains all known registers and capabilities from
these config regions.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman

thunderbolt: Setup control channel

2014-06-19T21:07:07+00:00

Add struct tb which will contain our view of the thunderbolt bus.  For
now it just contains a pointer to the control channel and a workqueue
for hotplug events.

Add thunderbolt_alloc_and_start() and thunderbolt_shutdown_and_free()
which are responsible for setup and teardown of struct tb.

Signed-off-by: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman