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git.ipfire.org Git - people/ms/u-boot.git/blob - arch/powerpc/cpu/mpc8260/ether_scc.c
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 * Modified so that it plays nicely when more than one ETHERNET interface
14 * is in use a la ether_fcc.c.
16 * DENX Software Engineerin GmbH
17 * Gary Jennejohn <garyj@denx.de>
19 * See file CREDITS for list of people who contributed to this
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License as
24 * published by the Free Software Foundation; either version 2 of
25 * the License, or (at your option) any later version.
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
39 #include <asm/cpm_8260.h>
46 #ifndef CONFIG_NET_MULTI
47 #error "CONFIG_NET_MULTI must be defined."
50 #if (CONFIG_ETHER_INDEX == 1)
51 # define PROFF_ENET PROFF_SCC1
52 # define CPM_CR_ENET_PAGE CPM_CR_SCC1_PAGE
53 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC1_SBLOCK
54 # define CMXSCR_MASK (CMXSCR_SC1 |\
58 #elif (CONFIG_ETHER_INDEX == 2)
59 # define PROFF_ENET PROFF_SCC2
60 # define CPM_CR_ENET_PAGE CPM_CR_SCC2_PAGE
61 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC2_SBLOCK
62 # define CMXSCR_MASK (CMXSCR_SC2 |\
66 #elif (CONFIG_ETHER_INDEX == 3)
67 # define PROFF_ENET PROFF_SCC3
68 # define CPM_CR_ENET_PAGE CPM_CR_SCC3_PAGE
69 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC3_SBLOCK
70 # define CMXSCR_MASK (CMXSCR_SC3 |\
73 #elif (CONFIG_ETHER_INDEX == 4)
74 # define PROFF_ENET PROFF_SCC4
75 # define CPM_CR_ENET_PAGE CPM_CR_SCC4_PAGE
76 # define CPM_CR_ENET_SBLOCK CPM_CR_SCC4_SBLOCK
77 # define CMXSCR_MASK (CMXSCR_SC4 |\
84 /* Ethernet Transmit and Receive Buffers */
85 #define DBUF_LENGTH 1520
89 #if !defined(CONFIG_SYS_SCC_TOUT_LOOP)
90 #define CONFIG_SYS_SCC_TOUT_LOOP 1000000
93 static char txbuf
[TX_BUF_CNT
][ DBUF_LENGTH
];
95 static uint rxIdx
; /* index of the current RX buffer */
96 static uint txIdx
; /* index of the current TX buffer */
99 * SCC Ethernet Tx and Rx buffer descriptors allocated at the
100 * immr->udata_bd address on Dual-Port RAM
101 * Provide for Double Buffering
104 typedef volatile struct CommonBufferDescriptor
{
105 cbd_t rxbd
[PKTBUFSRX
]; /* Rx BD */
106 cbd_t txbd
[TX_BUF_CNT
]; /* Tx BD */
112 static int sec_send(struct eth_device
*dev
, volatile void *packet
, int length
)
118 printf("scc: bad packet size: %d\n", length
);
122 for(i
=0; rtx
->txbd
[txIdx
].cbd_sc
& BD_ENET_TX_READY
; i
++) {
123 if (i
>= CONFIG_SYS_SCC_TOUT_LOOP
) {
124 puts ("scc: tx buffer not ready\n");
129 rtx
->txbd
[txIdx
].cbd_bufaddr
= (uint
)packet
;
130 rtx
->txbd
[txIdx
].cbd_datlen
= length
;
131 rtx
->txbd
[txIdx
].cbd_sc
|= (BD_ENET_TX_READY
| BD_ENET_TX_LAST
|
134 for(i
=0; rtx
->txbd
[txIdx
].cbd_sc
& BD_ENET_TX_READY
; i
++) {
135 if (i
>= CONFIG_SYS_SCC_TOUT_LOOP
) {
136 puts ("scc: tx error\n");
141 /* return only status bits */
142 result
= rtx
->txbd
[txIdx
].cbd_sc
& BD_ENET_TX_STATS
;
149 static int sec_rx(struct eth_device
*dev
)
155 if (rtx
->rxbd
[rxIdx
].cbd_sc
& BD_ENET_RX_EMPTY
) {
157 break; /* nothing received - leave for() loop */
160 length
= rtx
->rxbd
[rxIdx
].cbd_datlen
;
162 if (rtx
->rxbd
[rxIdx
].cbd_sc
& 0x003f)
164 printf("err: %x\n", rtx
->rxbd
[rxIdx
].cbd_sc
);
168 /* Pass the packet up to the protocol layers. */
169 NetReceive(NetRxPackets
[rxIdx
], length
- 4);
173 /* Give the buffer back to the SCC. */
174 rtx
->rxbd
[rxIdx
].cbd_datlen
= 0;
176 /* wrap around buffer index when necessary */
177 if ((rxIdx
+ 1) >= PKTBUFSRX
) {
178 rtx
->rxbd
[PKTBUFSRX
- 1].cbd_sc
= (BD_ENET_RX_WRAP
|
183 rtx
->rxbd
[rxIdx
].cbd_sc
= BD_ENET_RX_EMPTY
;
190 /**************************************************************
192 * SCC Ethernet Initialization Routine
194 *************************************************************/
196 static int sec_init(struct eth_device
*dev
, bd_t
*bis
)
199 volatile immap_t
*immr
= (immap_t
*)CONFIG_SYS_IMMR
;
200 scc_enet_t
*pram_ptr
;
208 * Assign static pointer to BD area.
209 * Avoid exhausting DPRAM, which would cause a panic.
212 dpaddr
= m8260_cpm_dpalloc(sizeof(RTXBD
) + 2, 16);
213 rtx
= (RTXBD
*)&immr
->im_dprambase
[dpaddr
];
216 /* 24.21 - (1-3): ioports have been set up already */
218 /* 24.21 - (4,5): connect SCC's tx and rx clocks, use NMSI for SCC */
219 immr
->im_cpmux
.cmx_uar
= 0;
220 immr
->im_cpmux
.cmx_scr
= ( (immr
->im_cpmux
.cmx_scr
& ~CMXSCR_MASK
) |
221 CONFIG_SYS_CMXSCR_VALUE
);
224 /* 24.21 (6) write RBASE and TBASE to parameter RAM */
225 pram_ptr
= (scc_enet_t
*)&(immr
->im_dprambase
[PROFF_ENET
]);
226 pram_ptr
->sen_genscc
.scc_rbase
= (unsigned int)(&rtx
->rxbd
[0]);
227 pram_ptr
->sen_genscc
.scc_tbase
= (unsigned int)(&rtx
->txbd
[0]);
229 pram_ptr
->sen_genscc
.scc_rfcr
= 0x18; /* Nrml Ops and Mot byte ordering */
230 pram_ptr
->sen_genscc
.scc_tfcr
= 0x18; /* Mot byte ordering, Nrml access */
232 pram_ptr
->sen_genscc
.scc_mrblr
= DBUF_LENGTH
; /* max. package len 1520 */
234 pram_ptr
->sen_cpres
= ~(0x0); /* Preset CRC */
235 pram_ptr
->sen_cmask
= 0xdebb20e3; /* Constant Mask for CRC */
238 /* 24.21 - (7): Write INIT RX AND TX PARAMETERS to CPCR */
239 while(immr
->im_cpm
.cp_cpcr
& CPM_CR_FLG
);
240 immr
->im_cpm
.cp_cpcr
= mk_cr_cmd(CPM_CR_ENET_PAGE
,
243 CPM_CR_INIT_TRX
) | CPM_CR_FLG
;
245 /* 24.21 - (8-18): Set up parameter RAM */
246 pram_ptr
->sen_crcec
= 0x0; /* Error Counter CRC (unused) */
247 pram_ptr
->sen_alec
= 0x0; /* Align Error Counter (unused) */
248 pram_ptr
->sen_disfc
= 0x0; /* Discard Frame Counter (unused) */
250 pram_ptr
->sen_pads
= 0x8888; /* Short Frame PAD Characters */
252 pram_ptr
->sen_retlim
= 15; /* Retry Limit Threshold */
254 pram_ptr
->sen_maxflr
= 1518; /* MAX Frame Length Register */
255 pram_ptr
->sen_minflr
= 64; /* MIN Frame Length Register */
257 pram_ptr
->sen_maxd1
= DBUF_LENGTH
; /* MAX DMA1 Length Register */
258 pram_ptr
->sen_maxd2
= DBUF_LENGTH
; /* MAX DMA2 Length Register */
260 pram_ptr
->sen_gaddr1
= 0x0; /* Group Address Filter 1 (unused) */
261 pram_ptr
->sen_gaddr2
= 0x0; /* Group Address Filter 2 (unused) */
262 pram_ptr
->sen_gaddr3
= 0x0; /* Group Address Filter 3 (unused) */
263 pram_ptr
->sen_gaddr4
= 0x0; /* Group Address Filter 4 (unused) */
265 eth_getenv_enetaddr("ethaddr", ea
);
266 pram_ptr
->sen_paddrh
= (ea
[5] << 8) + ea
[4];
267 pram_ptr
->sen_paddrm
= (ea
[3] << 8) + ea
[2];
268 pram_ptr
->sen_paddrl
= (ea
[1] << 8) + ea
[0];
270 pram_ptr
->sen_pper
= 0x0; /* Persistence (unused) */
272 pram_ptr
->sen_iaddr1
= 0x0; /* Individual Address Filter 1 (unused) */
273 pram_ptr
->sen_iaddr2
= 0x0; /* Individual Address Filter 2 (unused) */
274 pram_ptr
->sen_iaddr3
= 0x0; /* Individual Address Filter 3 (unused) */
275 pram_ptr
->sen_iaddr4
= 0x0; /* Individual Address Filter 4 (unused) */
277 pram_ptr
->sen_taddrh
= 0x0; /* Tmp Address (MSB) (unused) */
278 pram_ptr
->sen_taddrm
= 0x0; /* Tmp Address (unused) */
279 pram_ptr
->sen_taddrl
= 0x0; /* Tmp Address (LSB) (unused) */
281 /* 24.21 - (19): Initialize RxBD */
282 for (i
= 0; i
< PKTBUFSRX
; i
++)
284 rtx
->rxbd
[i
].cbd_sc
= BD_ENET_RX_EMPTY
;
285 rtx
->rxbd
[i
].cbd_datlen
= 0; /* Reset */
286 rtx
->rxbd
[i
].cbd_bufaddr
= (uint
)NetRxPackets
[i
];
289 rtx
->rxbd
[PKTBUFSRX
- 1].cbd_sc
|= BD_ENET_RX_WRAP
;
291 /* 24.21 - (20): Initialize TxBD */
292 for (i
= 0; i
< TX_BUF_CNT
; i
++)
294 rtx
->txbd
[i
].cbd_sc
= (BD_ENET_TX_PAD
|
297 rtx
->txbd
[i
].cbd_datlen
= 0; /* Reset */
298 rtx
->txbd
[i
].cbd_bufaddr
= (uint
)&txbuf
[i
][0];
301 rtx
->txbd
[TX_BUF_CNT
- 1].cbd_sc
|= BD_ENET_TX_WRAP
;
303 /* 24.21 - (21): Write 0xffff to SCCE */
304 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_scce
= ~(0x0);
306 /* 24.21 - (22): Write to SCCM to enable TXE, RXF, TXB events */
307 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_sccm
= (SCCE_ENET_TXE
|
311 /* 24.21 - (23): we don't use ethernet interrupts */
313 /* 24.21 - (24): Clear GSMR_H to enable normal operations */
314 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_gsmrh
= 0;
316 /* 24.21 - (25): Clear GSMR_L to enable normal operations */
317 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_gsmrl
= (SCC_GSMRL_TCI
|
320 SCC_GSMRL_MODE_ENET
);
322 /* 24.21 - (26): Initialize DSR */
323 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_dsr
= 0xd555;
325 /* 24.21 - (27): Initialize PSMR2
329 * NIB = Begin searching for SFD 22 bits after RENA
330 * FDE = Full Duplex Enable
331 * BRO = Reject broadcast packets
332 * PROMISCOUS = Catch all packets regardless of dest. MAC adress
334 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_psmr
= SCC_PSMR_ENCRC
|
336 #if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
339 #if defined(CONFIG_SCC_ENET_NO_BROADCAST)
342 #if defined(CONFIG_SCC_ENET_PROMISCOUS)
347 /* 24.21 - (28): Write to GSMR_L to enable SCC */
348 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_gsmrl
|= (SCC_GSMRL_ENR
|
355 static void sec_halt(struct eth_device
*dev
)
357 volatile immap_t
*immr
= (immap_t
*)CONFIG_SYS_IMMR
;
358 immr
->im_scc
[CONFIG_ETHER_INDEX
-1].scc_gsmrl
&= ~(SCC_GSMRL_ENR
|
363 static void sec_restart(void)
365 volatile immap_t
*immr
= (immap_t
*)CONFIG_SYS_IMMR
;
366 immr
->im_cpm
.cp_scc
[CONFIG_ETHER_INDEX
-1].scc_gsmrl
|= (SCC_GSMRL_ENR
|
371 int mpc82xx_scc_enet_initialize(bd_t
*bis
)
373 struct eth_device
*dev
;
375 dev
= (struct eth_device
*) malloc(sizeof *dev
);
376 memset(dev
, 0, sizeof *dev
);
378 sprintf(dev
->name
, "SCC ETHERNET");
379 dev
->init
= sec_init
;
380 dev
->halt
= sec_halt
;
381 dev
->send
= sec_send
;