The r0p7734 board has SH7734, 128MB DDR2-SDRAM, USB,
Ethernet, and more.

This patch supports the following functions:
- 128MB DDR2-SDRAM
- 32MB NOR Flash memory
- Serial console (SCIF)
- Ethernet (SH-Ether/SMSC)
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>

Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>

SH7734 support GMII. This add register infomation and the function
which enable GMII.
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

SH7734 has one channel ethernet device.
This support 10/100/1000Base, and RMII/MII/GMII.
And this has the same structure as SH7763.
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

Add several levels of DEBUG prints so that you can limit the noise to
the severety of your problem.

DEBUG_LL_STATE = Link local state machine changes
DEBUG_DEV_PKT = Packets or info directed to the device
DEBUG_NET_PKT = Packets on info on the network at large
DEBUG_INT_STATE = Internal network state changes
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Cisco's arp-proxy feature fails to ignore the link-local address range
This means that a link-local device on a network with this Cisco
equipment will reply to ARP requests for our device (in addition to
our reply).
If we happen to reply first, the requester's ARP table will be
populated with our MAC address, and one packet will be sent to us...
shortly following this, the requester will get an ARP reply from the
Cisco equipment telling the requester to send packets their way
instead of to our device from now on.
This work-around detects this link-local condition and will delay
replying to the ARP request for 5ms so that the first packet is sent
to the Cisco equipment and all following packets are sent to our
device.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Code based on networking/zcip.c in busybox
commit 8531d76a15890c2c535908ce888b2e2aed35b172
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Link-local support will need to send ARP packets, but needs more
fine-grained control over the contents.  Split the implementation
into 2 parts so link-local can share the code.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Use the NetArpTxPacket for the ARP packet, not to hold what used to
be in NetTxPacket.
This saves a copy and makes the code easier to understand.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Fix NetConsole bug that causes first packet header to claim a
source IP address of 0.0.0.0
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

A new non-static function net_init() will initialize buffers and
read from the environment.  Only update from the env on each entry
to NetLoop().
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Noone uses it.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Don't force ARP clients to return the MAC address if they don't care
(such as ping)
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>

This is useful if you want to look for a DHCP server, but try some
other settings if not available.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

If CONFIG_BOOTP_SERVERIP is not defined, unused variable warning is
reported.  This was fixed upstream using a compiler feature instead
of a simple reorder of the statements.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Before this patch, bootp would not overwrite the value, but the
value was still clobbered in the env
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

When the network is VLAN or SNAP, net_update_ether() will preserve
the original Ethernet packet header and simply replace the src and
dest MACs and the protocol
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Call a built-in dummy if none is registered... don't require
protocols to register a handler (eliminating dummies)
NetConsole now uses the ARP handler when waiting on arp
(instead of needing a #define hack in arp.c)
Clear handlers at the end of net loop
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Changes to NetState now go through an accessor function called
net_set_state()
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Use this entry-point consistently across the net/ code
Use a static inline function to preserve code size
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

There is no need to call through the handler... inline it
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Eliminate pointer subtraction that recovers values computed earlier
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Save the length when it is computed instead of forgetting it and
subtracting pointers to figure it out again.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Share more of the code that is common between ARP vs not.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

ICMP (ping) was reimplementing IP header code... it now shares code.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Use field names and sizes when accessing ARP packets
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Renamed for clarity
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Easier to find when alphabetized
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Clearer constant name.
Also remove related BOOTP_SIZE which was unused and doesn't take
into account VLAN packets.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

This is not called as a handler, so don't name it that way
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

x is a poor variable name
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Make the comment more accurate about the header including SNAP
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

This name more explicitly claims that it does not include the
header size
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Remove typedef and lower-case name
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Remove typedef and lower-case letters
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Eliminate the typedef and remove capital letters
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Separate the Ethernet header from the 802 header.
Base the size constants on the structs.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Add a structure that only contains IP header fields to be used by
functions that don't need UDP
Rename IP_HDR_SIZE_NO_UDP to IP_HDR_SIZE
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>

Rename IP header related things to IP_UDP. The existing definition
of IP_t includes UDP header, so name it to accurately describe the
structure.
Signed-off-by: NJoe Hershberger <joe.hershberger@ni.com>