LXR uboot/board/keymile/common/keymile_hdlc

   1/*
   2 * (C) Copyright 2008
   3 * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#ifndef _KEYMILE_HDLC_ENET_H_
  25#define _KEYMILE_HDLC_ENET_H_
  26
  27/* Unfortuantely, we have do this to get the flag defines in the cbd_t */
  28#ifdef CONFIG_KM8XX
  29#include <commproc.h>
  30#endif
  31#ifdef CONFIG_MGCOGE
  32#include <mpc8260.h>
  33#include <asm/cpm_8260.h>
  34#endif
  35
  36/*
  37 * Defines for the ICN protocol used for communication over HDLC
  38 * on the backplane between MGSUVDs and MGCOGEs.
  39 */
  40
  41/*
  42 * MAC which is reserved for communication (0x00 - 0xff in the last byte,
  43 * which is the slot number)
  44 */
  45
  46/*
  47 * A DLL frame looks like this:
  48 *  8 bit  |  8 bit     |  8 bit |  8 bit     | n * 8 bit| 16 bit|  8 bit
  49 *  opening| destination| source | application|  data    |  FCS  | closing
  50 *   flag  |  address   | address|            |          |       |  flag
  51 *  (HW)      (APP)       (APP)      (APP)       (APP)      (HW)   (HW)
  52 */
  53
  54/*
  55 * The opening flag, the FCS and the closing flag are set by the hardware so
  56 * they are not reflected in this struct.
  57 */
  58struct icn_hdr {
  59        unsigned char dest_addr;
  60        unsigned char src_addr;
  61        unsigned char application;
  62} __attribute__((packed));
  63
  64#define ICNHDR_LEN      (sizeof(struct icn_hdr))
  65#define CRC_LEN         (sizeof(short))
  66/* bytes to remove from packet before sending it upstream */
  67#define REMOVE          (ICNHDR_LEN + CRC_LEN)
  68
  69struct icn_frame {
  70        struct icn_hdr hdr;
  71        unsigned char data[0];  /* a place holder */
  72} __attribute__((packed));
  73
  74/* Address field */
  75#define HDLC_UUA        0x00 /* Unicast Unit Address */
  76#define HDLC_UUA_MASK   0x3f /* the last 6 bits contain the slot number */
  77#define SET_HDLC_UUA(x) ((HDLC_UUA | ((x) & HDLC_UUA_MASK)))
  78#define HDLC_UACUA      0x7f /* Unicast Active Control Unit Address */
  79#define HDLC_BCAST      0xff /* broadcast */
  80
  81/* Application field */
  82#define MGS_UUSP        0x00
  83#define MGS_UREP        0x01
  84#define MGS_IUP         0x02
  85#define MGS_UTA         0x03
  86#define MGS_MDS         0x04
  87#define MGS_ITIME       0x05
  88/* added by DENX */
  89#define MGS_NETCONS     0x06    /* netconsole */
  90#define MGS_TFTP        0x07
  91
  92/* Useful defines for buffer sizes, etc. */
  93#define HDLC_PKTBUFSRX          32
  94#define MAX_FRAME_LENGTH        1500 /* ethernet frame size */
  95                         /*   14        +    28     */
  96#define INET_HDR_SIZE   (ETHER_HDR_SIZE + IP_HDR_SIZE)
  97#define INET_HDR_ALIGN  (((INET_HDR_SIZE + PKTALIGN - 1) / PKTALIGN) * PKTALIGN)
  98/* INET_HDR_SIZE is stripped off */
  99#define PKT_MAXBLR_SIZE (MAX_FRAME_LENGTH + INET_HDR_ALIGN)
 100
 101/*
 102 * It is too slow to read always the port numbers and IP addresses from the
 103 * string variables.
 104 * cachedNumbers is meant to cache it.
 105 * THIS IS ONLY A SPEED IMPROVEMENT!
 106 */
 107enum {
 108        IP_ADDR = 0,    /* getenv_IPaddr("serverip"); */
 109        IP_SERVER,      /* getenv_IPaddr("ipaddr"); */
 110        TFTP_SRC_PORT,  /* simple_strtol(getenv("tftpsrcp"), NULL, 10); */
 111        TFTP_DST_PORT,  /* simple_strtol(getenv("tftpdstp"), NULL, 10); */
 112        NETCONS_PORT,   /* simple_strtol(getenv("ncip"), NULL, 10); */
 113        CACHEDNUMBERS
 114};
 115
 116#define WELL_KNOWN_PORT 69      /* Well known TFTP port # */
 117
 118/* define this to create a test commend (htest) */
 119#undef TEST_IT
 120#ifdef TEST_IT
 121/* have to save a copy of the eth_device for the test command's use */
 122struct eth_device *seth;
 123#endif
 124/* define this for outputting of received packets */
 125#undef TEST_RX
 126/* define this for outputting of packets being sent */
 127#undef TEST_TX
 128
 129#endif /* _KEYMILE_HDLC_ENET_H_ */
 130