LXR uboot/arch/powerpc/cpu/mpc8260/ether

   1/*
   2 * MPC8260 SCC Ethernet
   3 *
   4 * Copyright (c) 2000 MontaVista Software, Inc.   Dan Malek (dmalek@jlc.net)
   5 *
   6 * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7 * Marius Groeger <mgroeger@sysgo.de>
   8 *
   9 * (C) Copyright (c) 2001
  10 * Advent Networks, Inc. <http://www.adventnetworks.com>
  11 * Jay Monkman <jtm@smoothsmoothie.com>
  12 *
  13 * Modified so that it plays nicely when more than one ETHERNET interface
  14 * is in use a la ether_fcc.c.
  15 * (C) Copyright 2008
  16 * DENX Software Engineerin GmbH
  17 * Gary Jennejohn <garyj@denx.de>
  18 *
  19 * SPDX-License-Identifier:     GPL-2.0+
  20 */
  21
  22#include <common.h>
  23#include <asm/cpm_8260.h>
  24#include <mpc8260.h>
  25#include <malloc.h>
  26#include <net.h>
  27#include <command.h>
  28#include <config.h>
  29
  30#if (CONFIG_ETHER_INDEX == 1)
  31#  define PROFF_ENET            PROFF_SCC1
  32#  define CPM_CR_ENET_PAGE      CPM_CR_SCC1_PAGE
  33#  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC1_SBLOCK
  34#  define CMXSCR_MASK          (CMXSCR_SC1          |\
  35                                CMXSCR_RS1CS_MSK    |\
  36                                CMXSCR_TS1CS_MSK)
  37
  38#elif (CONFIG_ETHER_INDEX == 2)
  39#  define PROFF_ENET            PROFF_SCC2
  40#  define CPM_CR_ENET_PAGE      CPM_CR_SCC2_PAGE
  41#  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC2_SBLOCK
  42#  define CMXSCR_MASK          (CMXSCR_SC2          |\
  43                                CMXSCR_RS2CS_MSK    |\
  44                                CMXSCR_TS2CS_MSK)
  45
  46#elif (CONFIG_ETHER_INDEX == 3)
  47#  define PROFF_ENET            PROFF_SCC3
  48#  define CPM_CR_ENET_PAGE      CPM_CR_SCC3_PAGE
  49#  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC3_SBLOCK
  50#  define CMXSCR_MASK          (CMXSCR_SC3          |\
  51                                CMXSCR_RS3CS_MSK    |\
  52                                CMXSCR_TS3CS_MSK)
  53#elif (CONFIG_ETHER_INDEX == 4)
  54#  define PROFF_ENET            PROFF_SCC4
  55#  define CPM_CR_ENET_PAGE      CPM_CR_SCC4_PAGE
  56#  define CPM_CR_ENET_SBLOCK    CPM_CR_SCC4_SBLOCK
  57#  define CMXSCR_MASK          (CMXSCR_SC4          |\
  58                                CMXSCR_RS4CS_MSK    |\
  59                                CMXSCR_TS4CS_MSK)
  60
  61#endif
  62
  63
  64/* Ethernet Transmit and Receive Buffers */
  65#define DBUF_LENGTH  1520
  66
  67#define TX_BUF_CNT 2
  68
  69#if !defined(CONFIG_SYS_SCC_TOUT_LOOP)
  70  #define CONFIG_SYS_SCC_TOUT_LOOP 1000000
  71#endif
  72
  73static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ];
  74
  75static uint rxIdx;      /* index of the current RX buffer */
  76static uint txIdx;      /* index of the current TX buffer */
  77
  78/*
  79 * SCC Ethernet Tx and Rx buffer descriptors allocated at the
  80 *  immr->udata_bd address on Dual-Port RAM
  81 * Provide for Double Buffering
  82 */
  83
  84typedef volatile struct CommonBufferDescriptor {
  85    cbd_t rxbd[PKTBUFSRX];         /* Rx BD */
  86    cbd_t txbd[TX_BUF_CNT];        /* Tx BD */
  87} RTXBD;
  88
  89static RTXBD *rtx;
  90
  91
  92static int sec_send(struct eth_device *dev, void *packet, int length)
  93{
  94    int i;
  95    int result = 0;
  96
  97    if (length <= 0) {
  98        printf("scc: bad packet size: %d\n", length);
  99        goto out;
 100    }
 101
 102    for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
 103        if (i >= CONFIG_SYS_SCC_TOUT_LOOP) {
 104            puts ("scc: tx buffer not ready\n");
 105            goto out;
 106        }
 107    }
 108
 109    rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
 110    rtx->txbd[txIdx].cbd_datlen = length;
 111    rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |
 112                                BD_ENET_TX_WRAP);
 113
 114    for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
 115        if (i >= CONFIG_SYS_SCC_TOUT_LOOP) {
 116            puts ("scc: tx error\n");
 117            goto out;
 118        }
 119    }
 120
 121    /* return only status bits */
 122    result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;
 123
 124 out:
 125    return result;
 126}
 127
 128
 129static int sec_rx(struct eth_device *dev)
 130{
 131    int length;
 132
 133    for (;;)
 134    {
 135        if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
 136            length = -1;
 137            break;     /* nothing received - leave for() loop */
 138        }
 139
 140        length = rtx->rxbd[rxIdx].cbd_datlen;
 141
 142        if (rtx->rxbd[rxIdx].cbd_sc & 0x003f)
 143        {
 144            printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
 145        }
 146        else
 147        {
 148            /* Pass the packet up to the protocol layers. */
 149            net_process_received_packet(net_rx_packets[rxIdx], length - 4);
 150        }
 151
 152
 153        /* Give the buffer back to the SCC. */
 154        rtx->rxbd[rxIdx].cbd_datlen = 0;
 155
 156        /* wrap around buffer index when necessary */
 157        if ((rxIdx + 1) >= PKTBUFSRX) {
 158            rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP |
 159                                               BD_ENET_RX_EMPTY);
 160            rxIdx = 0;
 161        }
 162        else {
 163            rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
 164            rxIdx++;
 165        }
 166    }
 167    return length;
 168}
 169
 170/**************************************************************
 171 *
 172 * SCC Ethernet Initialization Routine
 173 *
 174 *************************************************************/
 175
 176static int sec_init(struct eth_device *dev, bd_t *bis)
 177{
 178    int i;
 179    volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
 180    scc_enet_t *pram_ptr;
 181    uint dpaddr;
 182    uchar ea[6];
 183
 184    rxIdx = 0;
 185    txIdx = 0;
 186
 187    /*
 188     * Assign static pointer to BD area.
 189     * Avoid exhausting DPRAM, which would cause a panic.
 190     */
 191    if (rtx == NULL) {
 192            dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16);
 193            rtx = (RTXBD *)&immr->im_dprambase[dpaddr];
 194    }
 195
 196    /* 24.21 - (1-3): ioports have been set up already */
 197
 198    /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
 199    immr->im_cpmux.cmx_uar = 0;
 200    immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) |
 201                               CONFIG_SYS_CMXSCR_VALUE);
 202
 203
 204    /* 24.21 (6) write RBASE and TBASE to parameter RAM */
 205    pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
 206    pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]);
 207    pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]);
 208
 209    pram_ptr->sen_genscc.scc_rfcr = 0x18;  /* Nrml Ops and Mot byte ordering */
 210    pram_ptr->sen_genscc.scc_tfcr = 0x18;  /* Mot byte ordering, Nrml access */
 211
 212    pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */
 213
 214    pram_ptr->sen_cpres  = ~(0x0);        /* Preset CRC */
 215    pram_ptr->sen_cmask  = 0xdebb20e3;    /* Constant Mask for CRC */
 216
 217
 218    /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
 219    while(immr->im_cpm.cp_cpcr & CPM_CR_FLG);
 220    immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
 221                                     CPM_CR_ENET_SBLOCK,
 222                                     0x0c,
 223                                     CPM_CR_INIT_TRX) | CPM_CR_FLG;
 224
 225    /* 24.21 - (8-18): Set up parameter RAM */
 226    pram_ptr->sen_crcec  = 0x0;           /* Error Counter CRC (unused) */
 227    pram_ptr->sen_alec   = 0x0;           /* Align Error Counter (unused) */
 228    pram_ptr->sen_disfc  = 0x0;           /* Discard Frame Counter (unused) */
 229
 230    pram_ptr->sen_pads   = 0x8888;        /* Short Frame PAD Characters */
 231
 232    pram_ptr->sen_retlim = 15;            /* Retry Limit Threshold */
 233
 234    pram_ptr->sen_maxflr = 1518;  /* MAX Frame Length Register */
 235    pram_ptr->sen_minflr = 64;            /* MIN Frame Length Register */
 236
 237    pram_ptr->sen_maxd1  = DBUF_LENGTH;   /* MAX DMA1 Length Register */
 238    pram_ptr->sen_maxd2  = DBUF_LENGTH;   /* MAX DMA2 Length Register */
 239
 240    pram_ptr->sen_gaddr1 = 0x0;   /* Group Address Filter 1 (unused) */
 241    pram_ptr->sen_gaddr2 = 0x0;   /* Group Address Filter 2 (unused) */
 242    pram_ptr->sen_gaddr3 = 0x0;   /* Group Address Filter 3 (unused) */
 243    pram_ptr->sen_gaddr4 = 0x0;   /* Group Address Filter 4 (unused) */
 244
 245    eth_getenv_enetaddr("ethaddr", ea);
 246    pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
 247    pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
 248    pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
 249
 250    pram_ptr->sen_pper   = 0x0;   /* Persistence (unused) */
 251
 252    pram_ptr->sen_iaddr1 = 0x0;   /* Individual Address Filter 1 (unused) */
 253    pram_ptr->sen_iaddr2 = 0x0;   /* Individual Address Filter 2 (unused) */
 254    pram_ptr->sen_iaddr3 = 0x0;   /* Individual Address Filter 3 (unused) */
 255    pram_ptr->sen_iaddr4 = 0x0;   /* Individual Address Filter 4 (unused) */
 256
 257    pram_ptr->sen_taddrh = 0x0;   /* Tmp Address (MSB) (unused) */
 258    pram_ptr->sen_taddrm = 0x0;   /* Tmp Address (unused) */
 259    pram_ptr->sen_taddrl = 0x0;   /* Tmp Address (LSB) (unused) */
 260
 261    /* 24.21 - (19): Initialize RxBD */
 262    for (i = 0; i < PKTBUFSRX; i++)
 263    {
 264        rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
 265        rtx->rxbd[i].cbd_datlen = 0;                  /* Reset */
 266        rtx->rxbd[i].cbd_bufaddr = (uint)net_rx_packets[i];
 267    }
 268
 269    rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
 270
 271    /* 24.21 - (20): Initialize TxBD */
 272    for (i = 0; i < TX_BUF_CNT; i++)
 273    {
 274        rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD  |
 275                               BD_ENET_TX_LAST |
 276                               BD_ENET_TX_TC);
 277        rtx->txbd[i].cbd_datlen = 0;                  /* Reset */
 278        rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
 279    }
 280
 281    rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
 282
 283    /* 24.21 - (21): Write 0xffff to SCCE */
 284    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0);
 285
 286    /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
 287    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE |
 288                                                   SCCE_ENET_RXF |
 289                                                   SCCE_ENET_TXB);
 290
 291    /* 24.21 - (23): we don't use ethernet interrupts */
 292
 293    /* 24.21 - (24): Clear GSMR_H to enable normal operations */
 294    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0;
 295
 296    /* 24.21 - (25): Clear GSMR_L to enable normal operations */
 297    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI        |
 298                                                    SCC_GSMRL_TPL_48     |
 299                                                    SCC_GSMRL_TPP_10     |
 300                                                    SCC_GSMRL_MODE_ENET);
 301
 302    /* 24.21 - (26): Initialize DSR */
 303    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555;
 304
 305    /* 24.21 - (27): Initialize PSMR2
 306     *
 307     * Settings:
 308     *  CRC = 32-Bit CCITT
 309     *  NIB = Begin searching for SFD 22 bits after RENA
 310     *  FDE = Full Duplex Enable
 311     *  BRO = Reject broadcast packets
 312     *  PROMISCOUS = Catch all packets regardless of dest. MAC adress
 313     */
 314    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr   =     SCC_PSMR_ENCRC  |
 315                                                        SCC_PSMR_NIB22  |
 316#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
 317                                                        SCC_PSMR_FDE    |
 318#endif
 319#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
 320                                                        SCC_PSMR_BRO    |
 321#endif
 322#if defined(CONFIG_SCC_ENET_PROMISCOUS)
 323                                                        SCC_PSMR_PRO    |
 324#endif
 325                                                        0;
 326
 327    /* 24.21 - (28): Write to GSMR_L to enable SCC */
 328    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
 329                                                     SCC_GSMRL_ENT);
 330
 331    return 0;
 332}
 333
 334
 335static void sec_halt(struct eth_device *dev)
 336{
 337    volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
 338    immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR |
 339                                                      SCC_GSMRL_ENT);
 340}
 341
 342#if 0
 343static void sec_restart(void)
 344{
 345    volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
 346    immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
 347                                                            SCC_GSMRL_ENT);
 348}
 349#endif
 350
 351int mpc82xx_scc_enet_initialize(bd_t *bis)
 352{
 353        struct eth_device *dev;
 354
 355        dev = (struct eth_device *) malloc(sizeof *dev);
 356        memset(dev, 0, sizeof *dev);
 357
 358        strcpy(dev->name, "SCC");
 359        dev->init   = sec_init;
 360        dev->halt   = sec_halt;
 361        dev->send   = sec_send;
 362        dev->recv   = sec_rx;
 363
 364        eth_register(dev);
 365
 366        return 1;
 367}
 368