/* * MPC8260 SCC Ethernet * * Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net) * * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH * Marius Groeger * * (C) Copyright (c) 2001 * Advent Networks, Inc. * Jay Monkman * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include #include #if defined(CONFIG_ETHER_ON_SCC) && (CONFIG_COMMANDS & CFG_CMD_NET) #if (CONFIG_ETHER_INDEX == 1) # define PROFF_ENET PROFF_SCC1 # define CPM_CR_ENET_PAGE CPM_CR_SCC1_PAGE # define CPM_CR_ENET_SBLOCK CPM_CR_SCC1_SBLOCK # define CMXSCR_MASK (CMXSCR_SC1 |\ CMXSCR_RS1CS_MSK |\ CMXSCR_TS1CS_MSK) #elif (CONFIG_ETHER_INDEX == 2) # define PROFF_ENET PROFF_SCC2 # define CPM_CR_ENET_PAGE CPM_CR_SCC2_PAGE # define CPM_CR_ENET_SBLOCK CPM_CR_SCC2_SBLOCK # define CMXSCR_MASK (CMXSCR_SC2 |\ CMXSCR_RS2CS_MSK |\ CMXSCR_TS2CS_MSK) #elif (CONFIG_ETHER_INDEX == 3) # define PROFF_ENET PROFF_SCC3 # define CPM_CR_ENET_PAGE CPM_CR_SCC3_PAGE # define CPM_CR_ENET_SBLOCK CPM_CR_SCC3_SBLOCK # define CMXSCR_MASK (CMXSCR_SC3 |\ CMXSCR_RS3CS_MSK |\ CMXSCR_TS3CS_MSK) #elif (CONFIG_ETHER_INDEX == 4) # define PROFF_ENET PROFF_SCC4 # define CPM_CR_ENET_PAGE CPM_CR_SCC4_PAGE # define CPM_CR_ENET_SBLOCK CPM_CR_SCC4_SBLOCK # define CMXSCR_MASK (CMXSCR_SC4 |\ CMXSCR_RS4CS_MSK |\ CMXSCR_TS4CS_MSK) #endif /* Ethernet Transmit and Receive Buffers */ #define DBUF_LENGTH 1520 #define TX_BUF_CNT 2 #define TOUT_LOOP 1000000 static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ]; static uint rxIdx; /* index of the current RX buffer */ static uint txIdx; /* index of the current TX buffer */ /* * SCC Ethernet Tx and Rx buffer descriptors allocated at the * immr->udata_bd address on Dual-Port RAM * Provide for Double Buffering */ typedef volatile struct CommonBufferDescriptor { cbd_t rxbd[PKTBUFSRX]; /* Rx BD */ cbd_t txbd[TX_BUF_CNT]; /* Tx BD */ } RTXBD; static RTXBD *rtx; int eth_send(volatile void *packet, int length) { int i; int result = 0; if (length <= 0) { printf("scc: bad packet size: %d\n", length); goto out; } for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) { if (i >= TOUT_LOOP) { printf("scc: tx buffer not ready\n"); goto out; } } rtx->txbd[txIdx].cbd_bufaddr = (uint)packet; rtx->txbd[txIdx].cbd_datlen = length; rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST | BD_ENET_TX_WRAP); for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) { if (i >= TOUT_LOOP) { printf("scc: tx error\n"); goto out; } } /* return only status bits */ result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS; out: return result; } int eth_rx(void) { int length; for (;;) { if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) { length = -1; break; /* nothing received - leave for() loop */ } length = rtx->rxbd[rxIdx].cbd_datlen; if (rtx->rxbd[rxIdx].cbd_sc & 0x003f) { printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc); } else { /* Pass the packet up to the protocol layers. */ NetReceive(NetRxPackets[rxIdx], length - 4); } /* Give the buffer back to the SCC. */ rtx->rxbd[rxIdx].cbd_datlen = 0; /* wrap around buffer index when necessary */ if ((rxIdx + 1) >= PKTBUFSRX) { rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY); rxIdx = 0; } else { rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY; rxIdx++; } } return length; } /************************************************************** * * SCC Ethernet Initialization Routine * *************************************************************/ int eth_init(bd_t *bis) { int i; volatile immap_t *immr = (immap_t *)CFG_IMMR; scc_enet_t *pram_ptr; uint dpaddr; rxIdx = 0; txIdx = 0; /* assign static pointer to BD area */ dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16); rtx = (RTXBD *)&immr->im_dprambase[dpaddr]; /* 24.21 - (1-3): ioports have been set up already */ /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */ immr->im_cpmux.cmx_uar = 0; immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) | CFG_CMXSCR_VALUE); /* 24.21 (6) write RBASE and TBASE to parameter RAM */ pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]); pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]); pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]); pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Nrml Ops and Mot byte ordering */ pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Nrml access */ pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */ pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */ pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */ /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */ while(immr->im_cpm.cp_cpcr & CPM_CR_FLG); immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE, CPM_CR_ENET_SBLOCK, 0x0c, CPM_CR_INIT_TRX) | CPM_CR_FLG; /* 24.21 - (8-18): Set up parameter RAM */ pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */ pram_ptr->sen_alec = 0x0; /* Align Error Counter (unused) */ pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */ pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */ pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */ pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */ pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */ pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */ pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */ pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */ pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */ pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */ pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */ # define ea bis->bi_enetaddr pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4]; pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2]; pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0]; # undef ea pram_ptr->sen_pper = 0x0; /* Persistence (unused) */ pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */ pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */ pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */ pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */ pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */ pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */ pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */ /* 24.21 - (19): Initialize RxBD */ for (i = 0; i < PKTBUFSRX; i++) { rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY; rtx->rxbd[i].cbd_datlen = 0; /* Reset */ rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i]; } rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP; /* 24.21 - (20): Initialize TxBD */ for (i = 0; i < TX_BUF_CNT; i++) { rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD | BD_ENET_TX_LAST | BD_ENET_TX_TC); rtx->txbd[i].cbd_datlen = 0; /* Reset */ rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0]; } rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP; /* 24.21 - (21): Write 0xffff to SCCE */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0); /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB); /* 24.21 - (23): we don't use ethernet interrupts */ /* 24.21 - (24): Clear GSMR_H to enable normal operations */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0; /* 24.21 - (25): Clear GSMR_L to enable normal operations */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 | SCC_GSMRL_MODE_ENET); /* 24.21 - (26): Initialize DSR */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555; /* 24.21 - (27): Initialize PSMR2 * * Settings: * CRC = 32-Bit CCITT * NIB = Begin searching for SFD 22 bits after RENA * FDE = Full Duplex Enable * BRO = Reject broadcast packets * PROMISCOUS = Catch all packets regardless of dest. MAC adress */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr = SCC_PSMR_ENCRC | SCC_PSMR_NIB22 | #if defined(CONFIG_SCC_ENET_FULL_DUPLEX) SCC_PSMR_FDE | #endif #if defined(CONFIG_SCC_ENET_NO_BROADCAST) SCC_PSMR_BRO | #endif #if defined(CONFIG_SCC_ENET_PROMISCOUS) SCC_PSMR_PRO | #endif 0; /* 24.21 - (28): Write to GSMR_L to enable SCC */ immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); return 0; } void eth_halt(void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); } #if 0 void restart(void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); } #endif #endif /* CONFIG_ETHER_ON_SCC && CFG_CMD_NET */