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135f553453
This implements the ICN protocol used across the backplane and is needed by all the keymile boards. Signed-off-by: Gary Jennejohn <garyj@denx.de>
129 lines
4 KiB
C
129 lines
4 KiB
C
/*
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* (C) Copyright 2008
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* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _KEYMILE_HDLC_ENET_H_
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#define _KEYMILE_HDLC_ENET_H_
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/* Unfortuantely, we have do this to get the flag defines in the cbd_t */
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#ifdef CONFIG_MGSUVD
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#include <commproc.h>
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#endif
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#ifdef CONFIG_MGCOGE
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#include <mpc8260.h>
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#include <asm/cpm_8260.h>
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#endif
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/*
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* Defines for the ICN protocol used for communication over HDLC
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* on the backplane between MGSUVDs and MGCOGEs.
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*/
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/*
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* MAC which is reserved for communication (0x00 - 0xff in the last byte,
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* which is the slot number)
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*/
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/*
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* A DLL frame looks like this:
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* 8 bit | 8 bit | 8 bit | 8 bit | n * 8 bit| 16 bit| 8 bit
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* opening| destination| source | application| data | FCS | closing
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* flag | address | address| | | | flag
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* (HW) (APP) (APP) (APP) (APP) (HW) (HW)
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*/
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/*
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* The opening flag, the FCS and the closing flag are set by the hardware so
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* they are not reflected in this struct.
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*/
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struct icn_hdr {
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unsigned char dest_addr;
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unsigned char src_addr;
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unsigned char application;
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} __attribute__((packed));
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#define ICNHDR_LEN (sizeof(struct icn_hdr))
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#define CRC_LEN (sizeof(short))
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/* bytes to remove from packet before sending it upstream */
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#define REMOVE (ICNHDR_LEN + CRC_LEN)
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struct icn_frame {
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struct icn_hdr hdr;
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unsigned char data[0]; /* a place holder */
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} __attribute__((packed));
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/* Address field */
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#define HDLC_UUA 0x00 /* Unicast Unit Address */
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#define HDLC_UUA_MASK 0x3f /* the last 6 bits contain the slot number */
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#define SET_HDLC_UUA(x) ((HDLC_UUA | ((x) & HDLC_UUA_MASK)))
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#define HDLC_UACUA 0x7f /* Unicast Active Control Unit Address */
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#define HDLC_BCAST 0xff /* broadcast */
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/* Application field */
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#define MGS_UUSP 0x00
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#define MGS_UREP 0x01
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#define MGS_IUP 0x02
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#define MGS_UTA 0x03
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#define MGS_MDS 0x04
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#define MGS_ITIME 0x05
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/* added by DENX */
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#define MGS_NETCONS 0x06 /* netconsole */
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#define MGS_TFTP 0x07
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/* Useful defines for buffer sizes, etc. */
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#define HDLC_PKTBUFSRX 32
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#define MAX_FRAME_LENGTH 1500 /* ethernet frame size */
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/* 14 + 28 */
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#define INET_HDR_SIZE (ETHER_HDR_SIZE + IP_HDR_SIZE)
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#define INET_HDR_ALIGN (((INET_HDR_SIZE + PKTALIGN - 1) / PKTALIGN) * PKTALIGN)
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/* INET_HDR_SIZE is stripped off */
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#define PKT_MAXBLR_SIZE (MAX_FRAME_LENGTH + INET_HDR_ALIGN)
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/*
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* It is too slow to read always the port numbers and IP addresses from the
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* string variables.
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* cachedNumbers is meant to cache it.
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* THIS IS ONLY A SPEED IMPROVEMENT!
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*/
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enum {
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IP_ADDR = 0, /* getenv_IPaddr("serverip"); */
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IP_SERVER, /* getenv_IPaddr("ipaddr"); */
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TFTP_SRC_PORT, /* simple_strtol(getenv("tftpsrcp"), NULL, 10); */
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TFTP_DST_PORT, /* simple_strtol(getenv("tftpdstp"), NULL, 10); */
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NETCONS_PORT, /* simple_strtol(getenv("ncip"), NULL, 10); */
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CACHEDNUMBERS
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};
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#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */
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/* define this to create a test commend (htest) */
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#undef TEST_IT
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#ifdef TEST_IT
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/* have to save a copy of the eth_device for the test command's use */
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struct eth_device *seth;
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#endif
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/* define this for outputting of received packets */
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#undef TEST_RX
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/* define this for outputting of packets being sent */
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#undef TEST_TX
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#endif /* _KEYMILE_HDLC_ENET_H_ */
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