| /* |
| * MPC8260 SCC Ethernet |
| * |
| * Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net) |
| * |
| * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| * Marius Groeger <mgroeger@sysgo.de> |
| * |
| * (C) Copyright (c) 2001 |
| * Advent Networks, Inc. <http://www.adventnetworks.com> |
| * Jay Monkman <jtm@smoothsmoothie.com> |
| * |
| * Modified so that it plays nicely when more than one ETHERNET interface |
| * is in use a la ether_fcc.c. |
| * (C) Copyright 2008 |
| * DENX Software Engineerin GmbH |
| * Gary Jennejohn <garyj@denx.de> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/cpm_8260.h> |
| #include <mpc8260.h> |
| #include <malloc.h> |
| #include <net.h> |
| #include <command.h> |
| #include <config.h> |
| |
| #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 |
| |
| #if !defined(CONFIG_SYS_SCC_TOUT_LOOP) |
| #define CONFIG_SYS_SCC_TOUT_LOOP 1000000 |
| #endif |
| |
| 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; |
| |
| |
| static int sec_send(struct eth_device *dev, 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 >= CONFIG_SYS_SCC_TOUT_LOOP) { |
| puts ("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 >= CONFIG_SYS_SCC_TOUT_LOOP) { |
| puts ("scc: tx error\n"); |
| goto out; |
| } |
| } |
| |
| /* return only status bits */ |
| result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS; |
| |
| out: |
| return result; |
| } |
| |
| |
| static int sec_rx(struct eth_device *dev) |
| { |
| 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 |
| * |
| *************************************************************/ |
| |
| static int sec_init(struct eth_device *dev, bd_t *bis) |
| { |
| int i; |
| volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; |
| scc_enet_t *pram_ptr; |
| uint dpaddr; |
| uchar ea[6]; |
| |
| rxIdx = 0; |
| txIdx = 0; |
| |
| /* |
| * Assign static pointer to BD area. |
| * Avoid exhausting DPRAM, which would cause a panic. |
| */ |
| if (rtx == NULL) { |
| 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) | |
| CONFIG_SYS_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) */ |
| |
| eth_getenv_enetaddr("ethaddr", ea); |
| 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]; |
| |
| 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; |
| } |
| |
| |
| static void sec_halt(struct eth_device *dev) |
| { |
| volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; |
| immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR | |
| SCC_GSMRL_ENT); |
| } |
| |
| #if 0 |
| static void sec_restart(void) |
| { |
| volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; |
| immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR | |
| SCC_GSMRL_ENT); |
| } |
| #endif |
| |
| int mpc82xx_scc_enet_initialize(bd_t *bis) |
| { |
| struct eth_device *dev; |
| |
| dev = (struct eth_device *) malloc(sizeof *dev); |
| memset(dev, 0, sizeof *dev); |
| |
| sprintf(dev->name, "SCC"); |
| dev->init = sec_init; |
| dev->halt = sec_halt; |
| dev->send = sec_send; |
| dev->recv = sec_rx; |
| |
| eth_register(dev); |
| |
| return 1; |
| } |
