4 * Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net)
6 * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
9 * (C) Copyright (c) 2001
10 * Advent Networks, Inc. <http://www.adventnetworks.com>
11 * Jay Monkman <jtm@smoothsmoothie.com>
13 * See file CREDITS for list of people who contributed to this
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #include <asm/cpm_8260.h>
39 #if defined(CONFIG_ETHER_ON_SCC) && defined(CONFIG_CMD_NET)
41 #if (CONFIG_ETHER_INDEX == 1)
42 # define PROFF_ENET PROFF_SCC1
43 # define CPM_CR_ENET_PAGE CPM_CR_SCC1_PAGE
44 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC1_SBLOCK
45 # define CMXSCR_MASK (CMXSCR_SC1 |\
49 #elif (CONFIG_ETHER_INDEX == 2)
50 # define PROFF_ENET PROFF_SCC2
51 # define CPM_CR_ENET_PAGE CPM_CR_SCC2_PAGE
52 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC2_SBLOCK
53 # define CMXSCR_MASK (CMXSCR_SC2 |\
57 #elif (CONFIG_ETHER_INDEX == 3)
58 # define PROFF_ENET PROFF_SCC3
59 # define CPM_CR_ENET_PAGE CPM_CR_SCC3_PAGE
60 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC3_SBLOCK
61 # define CMXSCR_MASK (CMXSCR_SC3 |\
64 #elif (CONFIG_ETHER_INDEX == 4)
65 # define PROFF_ENET PROFF_SCC4
66 # define CPM_CR_ENET_PAGE CPM_CR_SCC4_PAGE
67 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC4_SBLOCK
68 # define CMXSCR_MASK (CMXSCR_SC4 |\
75 /* Ethernet Transmit and Receive Buffers */
76 #define DBUF_LENGTH 1520
80 #if !defined(CFG_SCC_TOUT_LOOP)
81 #define CFG_SCC_TOUT_LOOP 1000000
84 static char txbuf[TX_BUF_CNT][ DBUF_LENGTH ];
86 static uint rxIdx; /* index of the current RX buffer */
87 static uint txIdx; /* index of the current TX buffer */
90 * SCC Ethernet Tx and Rx buffer descriptors allocated at the
91 * immr->udata_bd address on Dual-Port RAM
92 * Provide for Double Buffering
95 typedef volatile struct CommonBufferDescriptor {
96 cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
97 cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
103 int eth_send(volatile void *packet, int length)
109 printf("scc: bad packet size: %d\n", length);
113 for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
114 if (i >= CFG_SCC_TOUT_LOOP) {
115 puts ("scc: tx buffer not ready\n");
120 rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
121 rtx->txbd[txIdx].cbd_datlen = length;
122 rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |
125 for(i=0; rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) {
126 if (i >= CFG_SCC_TOUT_LOOP) {
127 puts ("scc: tx error\n");
132 /* return only status bits */
133 result = rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS;
146 if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
148 break; /* nothing received - leave for() loop */
151 length = rtx->rxbd[rxIdx].cbd_datlen;
153 if (rtx->rxbd[rxIdx].cbd_sc & 0x003f)
155 printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
159 /* Pass the packet up to the protocol layers. */
160 NetReceive(NetRxPackets[rxIdx], length - 4);
164 /* Give the buffer back to the SCC. */
165 rtx->rxbd[rxIdx].cbd_datlen = 0;
167 /* wrap around buffer index when necessary */
168 if ((rxIdx + 1) >= PKTBUFSRX) {
169 rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP |
174 rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
181 /**************************************************************
183 * SCC Ethernet Initialization Routine
185 *************************************************************/
187 int eth_init(bd_t *bis)
190 volatile immap_t *immr = (immap_t *)CFG_IMMR;
191 scc_enet_t *pram_ptr;
197 /* assign static pointer to BD area */
198 dpaddr = m8260_cpm_dpalloc(sizeof(RTXBD) + 2, 16);
199 rtx = (RTXBD *)&immr->im_dprambase[dpaddr];
201 /* 24.21 - (1-3): ioports have been set up already */
203 /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
204 immr->im_cpmux.cmx_uar = 0;
205 immr->im_cpmux.cmx_scr = ( (immr->im_cpmux.cmx_scr & ~CMXSCR_MASK) |
209 /* 24.21 (6) write RBASE and TBASE to parameter RAM */
210 pram_ptr = (scc_enet_t *)&(immr->im_dprambase[PROFF_ENET]);
211 pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]);
212 pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]);
214 pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Nrml Ops and Mot byte ordering */
215 pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Nrml access */
217 pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. package len 1520 */
219 pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
220 pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */
223 /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
224 while(immr->im_cpm.cp_cpcr & CPM_CR_FLG);
225 immr->im_cpm.cp_cpcr = mk_cr_cmd(CPM_CR_ENET_PAGE,
228 CPM_CR_INIT_TRX) | CPM_CR_FLG;
230 /* 24.21 - (8-18): Set up parameter RAM */
231 pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
232 pram_ptr->sen_alec = 0x0; /* Align Error Counter (unused) */
233 pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */
235 pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */
237 pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */
239 pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
240 pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */
242 pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
243 pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */
245 pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
246 pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
247 pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
248 pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */
250 # define ea bis->bi_enetaddr
251 pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
252 pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
253 pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
256 pram_ptr->sen_pper = 0x0; /* Persistence (unused) */
258 pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
259 pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
260 pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
261 pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */
263 pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
264 pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
265 pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */
267 /* 24.21 - (19): Initialize RxBD */
268 for (i = 0; i < PKTBUFSRX; i++)
270 rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
271 rtx->rxbd[i].cbd_datlen = 0; /* Reset */
272 rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
275 rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
277 /* 24.21 - (20): Initialize TxBD */
278 for (i = 0; i < TX_BUF_CNT; i++)
280 rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD |
283 rtx->txbd[i].cbd_datlen = 0; /* Reset */
284 rtx->txbd[i].cbd_bufaddr = (uint)&txbuf[i][0];
287 rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
289 /* 24.21 - (21): Write 0xffff to SCCE */
290 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_scce = ~(0x0);
292 /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
293 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_sccm = (SCCE_ENET_TXE |
297 /* 24.21 - (23): we don't use ethernet interrupts */
299 /* 24.21 - (24): Clear GSMR_H to enable normal operations */
300 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrh = 0;
302 /* 24.21 - (25): Clear GSMR_L to enable normal operations */
303 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl = (SCC_GSMRL_TCI |
306 SCC_GSMRL_MODE_ENET);
308 /* 24.21 - (26): Initialize DSR */
309 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_dsr = 0xd555;
311 /* 24.21 - (27): Initialize PSMR2
315 * NIB = Begin searching for SFD 22 bits after RENA
316 * FDE = Full Duplex Enable
317 * BRO = Reject broadcast packets
318 * PROMISCOUS = Catch all packets regardless of dest. MAC adress
320 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_psmr = SCC_PSMR_ENCRC |
322 #if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
325 #if defined(CONFIG_SCC_ENET_NO_BROADCAST)
328 #if defined(CONFIG_SCC_ENET_PROMISCOUS)
333 /* 24.21 - (28): Write to GSMR_L to enable SCC */
334 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |
343 volatile immap_t *immr = (immap_t *)CFG_IMMR;
344 immr->im_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl &= ~(SCC_GSMRL_ENR |
351 volatile immap_t *immr = (immap_t *)CFG_IMMR;
352 immr->im_cpm.cp_scc[CONFIG_ETHER_INDEX-1].scc_gsmrl |= (SCC_GSMRL_ENR |