Merge branch 'for-next/net'

Merge branch 'for-next/misc'

net: Add linuxdevname property ...

When you have a static network environment but more than one network
device on your machine it is necessary to provide the <device> parameter
to the ip parameter at kernel cmd line.

The device name assigned by Linux cannot in general be predicted as it
depends on driver bind order.

This patch introduces a new property linux.devname to eth devices.
The value is added to bootargs per interface and can be changed in
env/network/INTF

Based on patch by Gavin Schenk <g.schenk@eckelmann.de>.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Provide new way to configure network devices ...

This provides a new way to configure network interfaces based
on nvvars. A network interface can now be configured with variables
in the nv.dev.<ethname>.* namespace. There is a new network device
parameter "mode" which specifies the mode used to obtain IP settings.
The mode can be "dhcp", "static" or "disabled":

nv.dev.eth0.mode=dhcp
(ipaddr, netmask are ignored in this setting)

nv.dev.eth0.mode=static
nv.dev.eth0.ipaddr=192.168.0.17
nv.dev.eth0.netmask=255.255.0.0

nv.dev.eth0.mode=disabled

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: remove "current" network device ...

Now that we can do routing we no longer need a "current"
network device. Remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Pick network device based on IP settings ...

The IP/netmask/gateway settings contain all informations
needed to pick the correct network device. This patch
adds support for that and makes specifying the "current"
network interface using the ethact command unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: dhcp: rework ...

The DHCP code is a mess. It is not clear which options are sent to the
server and which options are returned from the server. Also environment
variables are read from and written to all over the place.

This patch cleans this up. There now is struct dhcp_req_param which is
used for options sent to the server and struct dhcp_result which contains
the values sent from the server. The values from the server are written
to the barebox variables in a single place. Also it's now possible to
call the dhcp code without modifying barebox variables at all, storing
the result only in the dhcp result struct.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: dhcp: Allow to specify network device ...

Instead of allowing to DHCP only on the "current" network
device, allow to specify the desired network device. This
is a first step to get rid of the concept of a "current"
network device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: Introduce devpath_to_name() ...

Add a simple function to simplify the task of accepting both full path
in "/dev" and just device name as a parameter.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: mdio-mux: Avoid probing multiplexed busses ...

Calling mdiobus_detect() for a bus that serves as a parent for a MDIO
bus multiplexer would result in parent bus being populated with
devices that are present on downstream bus that multiplexer happens to
be "pointing" at that moment. To avoid that introduce 'is_multiplexed'
flag to struct mii_bus and change mdiobus_detect to ignore busses for
which that flag is set.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: phy: Port MDIO bus miltiplexer framework from Linux kernel ...

Port mdio-mux.c from Linux kernel to Barebox, to support adding
dirvers that rely on that infrastructure/API.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mdio_bus: Port of_mdio_find_bus() from Linux kernel ...

Port of_mdio_find_bus() from Linux kernel. This function is used in
MDIO multiplexor infrastructure added in following commit.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: allow udp connections on specified network device ...

This allows the DHCP code to configure specific network
devices so that DHCP no longer depends on any "current"
network device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Use a single gateway ...

There is not much point in having a network device specific
gateway. If barebox really is part of such a complicated network
in which it needs multiple gateways, then we probably need a
real routing table. Until this happens, a single gateway should
be enough.

This introduces global.net.gateway which holds the gateway ip. The
previously used device specific <ethx>.gateway variables still exist,
but are only aliases for the single gateway.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: dhcp: Do not overwrite serverip if it is valid ...

Some DHCP servers provide the wrong serverip in which case
it is desired to specify it manually and won't let the dhcp
command overwrite it.
This has previously been done by setting the serverip again
to the desired value after dhcp has been executed. With this
patch we do not overwrite it in the first place if it is valid
already. This is necessary when the serverip is not set via
/env/network/eth* but via nv.net.server.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: introduce global.net.server ...

The server to use is independent of the network device, there is
not much point to make the server specific to a network device.

This introduces global.net.server as the serverip which is
used as standard NFS/tftp server. The previously used eth
device specific parameters still exist, but are only aliases
for the global single variable.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Add functions to get/set nameserver and domainname ...

It's more convenient to have getter/setter functions for
variables rather than using the detour around global vars
which use string matching and all kinds of overhead in the
background.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Add and use IP_BROADCAST ...

Rather than using the hardcoded value 0xffffffff in several places
add a define for the broadcast IP.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: Add device_detect_all() function ...

Add a device_detect_all function to detect all devices and use it
in the detect command. This makes the functionality reusable in other
code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nv: add device parameter overwrites to completion list ...

nv variables in the form dev.<devname>.* can be used to make device
parameters persistent. Add these to the completion list to make setting
these variables more convenient.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fs: Fix can_lseek_backward() ...

To quote corresponding man page:

"... Upon successful completion, lseek() returns the resulting offset
location as measured in bytes from the beginning of the file."

Which for lseek(fd, 0, SEEK_SET) would be 0, so returning 'ret' as
final step of the function would mean it'd never return anything but 0
as well. Change the code to explicitly return '1' to fix the problem.

Fixes: 7c3f8d366 ("uimage: fix: add can_lseek_backward and use in uimage_open")
Cc: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/omap'

Merge branch 'for-next/efi'

uimage: fix: add can_lseek_backward and use in uimage_open ...

Since commit ce0cc7fe we support forward seek on tftpfs. This feature
breaks the condition to check rather we open an uimage over tftp. Since
backward seeking is the problem here, we add the function
can_lseek_backward and check for it instead of the simple lseek.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: oftree: Add autoenable functionality ...

This patch adds an API to automatically enable either hardware components
with existing device drivers or i2c clients. All functions take a device
tree path to find the hardware and will fix up the node status in the
kernel device tree, if it's accessible.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: state: Add function to read state MAC ...

This API function allows to receive a copy of a MAC address from
variables in a state.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

efi-gui: add USB IO Protocol GUID definition ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/usbgadget'

Merge branch 'for-next/misc'

of: base: add function to copy a device tree node ...

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>