2 * (C) Copyright 2001-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 void eth_parse_enetaddr(const char *addr
, uchar
*enetaddr
)
35 for (i
= 0; i
< 6; ++i
) {
36 enetaddr
[i
] = addr
? simple_strtoul(addr
, &end
, 16) : 0;
38 addr
= (*end
) ? end
+ 1 : end
;
42 int eth_getenv_enetaddr(char *name
, uchar
*enetaddr
)
44 eth_parse_enetaddr(getenv(name
), enetaddr
);
45 return is_valid_ether_addr(enetaddr
);
48 int eth_setenv_enetaddr(char *name
, const uchar
*enetaddr
)
52 sprintf(buf
, "%pM", enetaddr
);
54 return setenv(name
, buf
);
57 int eth_getenv_enetaddr_by_index(const char *base_name
, int index
,
61 sprintf(enetvar
, index
? "%s%daddr" : "%saddr", base_name
, index
);
62 return eth_getenv_enetaddr(enetvar
, enetaddr
);
65 static int eth_mac_skip(int index
)
69 sprintf(enetvar
, index
? "eth%dmacskip" : "ethmacskip", index
);
70 return ((skip_state
= getenv(enetvar
)) != NULL
);
74 * CPU and board-specific Ethernet initializations. Aliased function
75 * signals caller to move on
77 static int __def_eth_init(bd_t
*bis
)
81 int cpu_eth_init(bd_t
*bis
) __attribute__((weak
, alias("__def_eth_init")));
82 int board_eth_init(bd_t
*bis
) __attribute__((weak
, alias("__def_eth_init")));
88 } eth_rcv_bufs
[PKTBUFSRX
];
90 static unsigned int eth_rcv_current
, eth_rcv_last
;
93 static struct eth_device
*eth_devices
, *eth_current
;
95 struct eth_device
*eth_get_dev(void)
100 struct eth_device
*eth_get_dev_by_name(const char *devname
)
102 struct eth_device
*dev
, *target_dev
;
104 BUG_ON(devname
== NULL
);
112 if (strcmp(devname
, dev
->name
) == 0) {
117 } while (dev
!= eth_devices
);
122 struct eth_device
*eth_get_dev_by_index(int index
)
124 struct eth_device
*dev
, *target_dev
;
132 if (dev
->index
== index
) {
137 } while (dev
!= eth_devices
);
142 int eth_get_dev_index(void)
147 return eth_current
->index
;
150 static void eth_current_changed(void)
152 char *act
= getenv("ethact");
153 /* update current ethernet name */
155 if (act
== NULL
|| strcmp(act
, eth_current
->name
) != 0)
156 setenv("ethact", eth_current
->name
);
159 * remove the variable completely if there is no active
162 else if (act
!= NULL
)
163 setenv("ethact", NULL
);
166 int eth_write_hwaddr(struct eth_device
*dev
, const char *base_name
,
169 unsigned char env_enetaddr
[6];
172 eth_getenv_enetaddr_by_index(base_name
, eth_number
, env_enetaddr
);
174 if (memcmp(env_enetaddr
, "\0\0\0\0\0\0", 6)) {
175 if (memcmp(dev
->enetaddr
, "\0\0\0\0\0\0", 6) &&
176 memcmp(dev
->enetaddr
, env_enetaddr
, 6)) {
177 printf("\nWarning: %s MAC addresses don't match:\n",
179 printf("Address in SROM is %pM\n",
181 printf("Address in environment is %pM\n",
185 memcpy(dev
->enetaddr
, env_enetaddr
, 6);
188 if (dev
->write_hwaddr
&&
189 !eth_mac_skip(eth_number
) &&
190 is_valid_ether_addr(dev
->enetaddr
))
191 ret
= dev
->write_hwaddr(dev
);
196 int eth_register(struct eth_device
*dev
)
198 struct eth_device
*d
;
201 assert(strlen(dev
->name
) < sizeof(dev
->name
));
204 eth_current
= eth_devices
= dev
;
205 eth_current_changed();
207 for (d
= eth_devices
; d
->next
!= eth_devices
; d
= d
->next
)
212 dev
->state
= ETH_STATE_INIT
;
213 dev
->next
= eth_devices
;
214 dev
->index
= index
++;
219 int eth_unregister(struct eth_device
*dev
)
221 struct eth_device
*cur
;
227 for (cur
= eth_devices
; cur
->next
!= eth_devices
&& cur
->next
!= dev
;
231 /* Device not found */
232 if (cur
->next
!= dev
)
235 cur
->next
= dev
->next
;
237 if (eth_devices
== dev
)
238 eth_devices
= dev
->next
== eth_devices
? NULL
: dev
->next
;
240 if (eth_current
== dev
) {
241 eth_current
= eth_devices
;
242 eth_current_changed();
248 static void eth_env_init(bd_t
*bis
)
252 if ((s
= getenv("bootfile")) != NULL
)
253 copy_filename(BootFile
, s
, sizeof(BootFile
));
256 int eth_initialize(bd_t
*bis
)
262 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START
);
263 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
274 * If board-specific initialization exists, call it.
275 * If not, call a CPU-specific one
277 if (board_eth_init
!= __def_eth_init
) {
278 if (board_eth_init(bis
) < 0)
279 printf("Board Net Initialization Failed\n");
280 } else if (cpu_eth_init
!= __def_eth_init
) {
281 if (cpu_eth_init(bis
) < 0)
282 printf("CPU Net Initialization Failed\n");
284 printf("Net Initialization Skipped\n");
287 puts("No ethernet found.\n");
288 bootstage_error(BOOTSTAGE_ID_NET_ETH_START
);
290 struct eth_device
*dev
= eth_devices
;
291 char *ethprime
= getenv("ethprime");
293 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT
);
298 printf("%s", dev
->name
);
300 if (ethprime
&& strcmp(dev
->name
, ethprime
) == 0) {
305 if (strchr(dev
->name
, ' '))
306 puts("\nWarning: eth device name has a space!"
309 if (eth_write_hwaddr(dev
, "eth", dev
->index
))
310 puts("\nWarning: failed to set MAC address\n");
314 } while (dev
!= eth_devices
);
316 eth_current_changed();
323 #ifdef CONFIG_MCAST_TFTP
325 * mcast_addr: multicast ipaddr from which multicast Mac is made
326 * join: 1=join, 0=leave.
328 int eth_mcast_join(IPaddr_t mcast_ip
, u8 join
)
331 if (!eth_current
|| !eth_current
->mcast
)
333 mcast_mac
[5] = htonl(mcast_ip
) & 0xff;
334 mcast_mac
[4] = (htonl(mcast_ip
)>>8) & 0xff;
335 mcast_mac
[3] = (htonl(mcast_ip
)>>16) & 0x7f;
339 return eth_current
->mcast(eth_current
, mcast_mac
, join
);
342 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
343 * and this is the ethernet-crc method needed for TSEC -- and perhaps
344 * some other adapter -- hash tables
346 #define CRCPOLY_LE 0xedb88320
347 u32
ether_crc(size_t len
, unsigned char const *p
)
354 for (i
= 0; i
< 8; i
++)
355 crc
= (crc
>> 1) ^ ((crc
& 1) ? CRCPOLY_LE
: 0);
357 /* an reverse the bits, cuz of way they arrive -- last-first */
358 crc
= (crc
>> 16) | (crc
<< 16);
359 crc
= (crc
>> 8 & 0x00ff00ff) | (crc
<< 8 & 0xff00ff00);
360 crc
= (crc
>> 4 & 0x0f0f0f0f) | (crc
<< 4 & 0xf0f0f0f0);
361 crc
= (crc
>> 2 & 0x33333333) | (crc
<< 2 & 0xcccccccc);
362 crc
= (crc
>> 1 & 0x55555555) | (crc
<< 1 & 0xaaaaaaaa);
369 int eth_init(bd_t
*bis
)
371 struct eth_device
*old_current
, *dev
;
374 puts("No ethernet found.\n");
378 /* Sync environment with network devices */
381 uchar env_enetaddr
[6];
383 if (eth_getenv_enetaddr_by_index("eth", dev
->index
,
385 memcpy(dev
->enetaddr
, env_enetaddr
, 6);
388 } while (dev
!= eth_devices
);
390 old_current
= eth_current
;
392 debug("Trying %s\n", eth_current
->name
);
394 if (eth_current
->init(eth_current
, bis
) >= 0) {
395 eth_current
->state
= ETH_STATE_ACTIVE
;
402 } while (old_current
!= eth_current
);
412 eth_current
->halt(eth_current
);
414 eth_current
->state
= ETH_STATE_PASSIVE
;
417 int eth_send(void *packet
, int length
)
422 return eth_current
->send(eth_current
, packet
, length
);
430 return eth_current
->recv(eth_current
);
434 static void eth_save_packet(void *packet
, int length
)
439 if ((eth_rcv_last
+1) % PKTBUFSRX
== eth_rcv_current
)
442 if (PKTSIZE
< length
)
445 for (i
= 0; i
< length
; i
++)
446 eth_rcv_bufs
[eth_rcv_last
].data
[i
] = p
[i
];
448 eth_rcv_bufs
[eth_rcv_last
].length
= length
;
449 eth_rcv_last
= (eth_rcv_last
+ 1) % PKTBUFSRX
;
452 int eth_receive(void *packet
, int length
)
455 void *pp
= push_packet
;
458 if (eth_rcv_current
== eth_rcv_last
) {
459 push_packet
= eth_save_packet
;
463 if (eth_rcv_current
== eth_rcv_last
)
467 if (length
< eth_rcv_bufs
[eth_rcv_current
].length
)
470 length
= eth_rcv_bufs
[eth_rcv_current
].length
;
472 for (i
= 0; i
< length
; i
++)
473 p
[i
] = eth_rcv_bufs
[eth_rcv_current
].data
[i
];
475 eth_rcv_current
= (eth_rcv_current
+ 1) % PKTBUFSRX
;
478 #endif /* CONFIG_API */
480 void eth_try_another(int first_restart
)
482 static struct eth_device
*first_failed
;
486 * Do not rotate between network interfaces when
487 * 'ethrotate' variable is set to 'no'.
489 ethrotate
= getenv("ethrotate");
490 if ((ethrotate
!= NULL
) && (strcmp(ethrotate
, "no") == 0))
497 first_failed
= eth_current
;
499 eth_current
= eth_current
->next
;
501 eth_current_changed();
503 if (first_failed
== eth_current
)
507 void eth_set_current(void)
510 static int env_changed_id
;
511 struct eth_device
*old_current
;
514 if (!eth_current
) /* XXX no current */
517 env_id
= get_env_id();
518 if ((act
== NULL
) || (env_changed_id
!= env_id
)) {
519 act
= getenv("ethact");
520 env_changed_id
= env_id
;
523 old_current
= eth_current
;
525 if (strcmp(eth_current
->name
, act
) == 0)
527 eth_current
= eth_current
->next
;
528 } while (old_current
!= eth_current
);
531 eth_current_changed();
534 char *eth_get_name(void)
536 return eth_current
? eth_current
->name
: "unknown";