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1 | /* | |
2 | * (C) Copyright 2001-2015 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * Joe Hershberger, National Instruments | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <command.h> | |
11 | #include <environment.h> | |
12 | #include <net.h> | |
13 | #include <phy.h> | |
14 | #include <linux/errno.h> | |
15 | #include "eth_internal.h" | |
16 | ||
17 | DECLARE_GLOBAL_DATA_PTR; | |
18 | ||
19 | /* | |
20 | * CPU and board-specific Ethernet initializations. Aliased function | |
21 | * signals caller to move on | |
22 | */ | |
23 | static int __def_eth_init(bd_t *bis) | |
24 | { | |
25 | return -1; | |
26 | } | |
27 | int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init"))); | |
28 | int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init"))); | |
29 | ||
30 | #ifdef CONFIG_API | |
31 | static struct { | |
32 | uchar data[PKTSIZE]; | |
33 | int length; | |
34 | } eth_rcv_bufs[PKTBUFSRX]; | |
35 | ||
36 | static unsigned int eth_rcv_current, eth_rcv_last; | |
37 | #endif | |
38 | ||
39 | static struct eth_device *eth_devices; | |
40 | struct eth_device *eth_current; | |
41 | ||
42 | void eth_set_current_to_next(void) | |
43 | { | |
44 | eth_current = eth_current->next; | |
45 | } | |
46 | ||
47 | void eth_set_dev(struct eth_device *dev) | |
48 | { | |
49 | eth_current = dev; | |
50 | } | |
51 | ||
52 | struct eth_device *eth_get_dev_by_name(const char *devname) | |
53 | { | |
54 | struct eth_device *dev, *target_dev; | |
55 | ||
56 | BUG_ON(devname == NULL); | |
57 | ||
58 | if (!eth_devices) | |
59 | return NULL; | |
60 | ||
61 | dev = eth_devices; | |
62 | target_dev = NULL; | |
63 | do { | |
64 | if (strcmp(devname, dev->name) == 0) { | |
65 | target_dev = dev; | |
66 | break; | |
67 | } | |
68 | dev = dev->next; | |
69 | } while (dev != eth_devices); | |
70 | ||
71 | return target_dev; | |
72 | } | |
73 | ||
74 | struct eth_device *eth_get_dev_by_index(int index) | |
75 | { | |
76 | struct eth_device *dev, *target_dev; | |
77 | ||
78 | if (!eth_devices) | |
79 | return NULL; | |
80 | ||
81 | dev = eth_devices; | |
82 | target_dev = NULL; | |
83 | do { | |
84 | if (dev->index == index) { | |
85 | target_dev = dev; | |
86 | break; | |
87 | } | |
88 | dev = dev->next; | |
89 | } while (dev != eth_devices); | |
90 | ||
91 | return target_dev; | |
92 | } | |
93 | ||
94 | int eth_get_dev_index(void) | |
95 | { | |
96 | if (!eth_current) | |
97 | return -1; | |
98 | ||
99 | return eth_current->index; | |
100 | } | |
101 | ||
102 | static int on_ethaddr(const char *name, const char *value, enum env_op op, | |
103 | int flags) | |
104 | { | |
105 | int index; | |
106 | struct eth_device *dev; | |
107 | ||
108 | if (!eth_devices) | |
109 | return 0; | |
110 | ||
111 | /* look for an index after "eth" */ | |
112 | index = simple_strtoul(name + 3, NULL, 10); | |
113 | ||
114 | dev = eth_devices; | |
115 | do { | |
116 | if (dev->index == index) { | |
117 | switch (op) { | |
118 | case env_op_create: | |
119 | case env_op_overwrite: | |
120 | eth_parse_enetaddr(value, dev->enetaddr); | |
121 | eth_write_hwaddr(dev, "eth", dev->index); | |
122 | break; | |
123 | case env_op_delete: | |
124 | memset(dev->enetaddr, 0, ARP_HLEN); | |
125 | } | |
126 | } | |
127 | dev = dev->next; | |
128 | } while (dev != eth_devices); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr); | |
133 | ||
134 | int eth_write_hwaddr(struct eth_device *dev, const char *base_name, | |
135 | int eth_number) | |
136 | { | |
137 | unsigned char env_enetaddr[ARP_HLEN]; | |
138 | int ret = 0; | |
139 | ||
140 | eth_env_get_enetaddr_by_index(base_name, eth_number, env_enetaddr); | |
141 | ||
142 | if (!is_zero_ethaddr(env_enetaddr)) { | |
143 | if (!is_zero_ethaddr(dev->enetaddr) && | |
144 | memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) { | |
145 | printf("\nWarning: %s MAC addresses don't match:\n", | |
146 | dev->name); | |
147 | printf("Address in SROM is %pM\n", | |
148 | dev->enetaddr); | |
149 | printf("Address in environment is %pM\n", | |
150 | env_enetaddr); | |
151 | } | |
152 | ||
153 | memcpy(dev->enetaddr, env_enetaddr, ARP_HLEN); | |
154 | } else if (is_valid_ethaddr(dev->enetaddr)) { | |
155 | eth_env_set_enetaddr_by_index(base_name, eth_number, | |
156 | dev->enetaddr); | |
157 | } else if (is_zero_ethaddr(dev->enetaddr)) { | |
158 | #ifdef CONFIG_NET_RANDOM_ETHADDR | |
159 | net_random_ethaddr(dev->enetaddr); | |
160 | printf("\nWarning: %s (eth%d) using random MAC address - %pM\n", | |
161 | dev->name, eth_number, dev->enetaddr); | |
162 | #else | |
163 | printf("\nError: %s address not set.\n", | |
164 | dev->name); | |
165 | return -EINVAL; | |
166 | #endif | |
167 | } | |
168 | ||
169 | if (dev->write_hwaddr && !eth_mac_skip(eth_number)) { | |
170 | if (!is_valid_ethaddr(dev->enetaddr)) { | |
171 | printf("\nError: %s address %pM illegal value\n", | |
172 | dev->name, dev->enetaddr); | |
173 | return -EINVAL; | |
174 | } | |
175 | ||
176 | ret = dev->write_hwaddr(dev); | |
177 | if (ret) | |
178 | printf("\nWarning: %s failed to set MAC address\n", | |
179 | dev->name); | |
180 | } | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
185 | int eth_register(struct eth_device *dev) | |
186 | { | |
187 | struct eth_device *d; | |
188 | static int index; | |
189 | ||
190 | assert(strlen(dev->name) < sizeof(dev->name)); | |
191 | ||
192 | if (!eth_devices) { | |
193 | eth_devices = dev; | |
194 | eth_current = dev; | |
195 | eth_current_changed(); | |
196 | } else { | |
197 | for (d = eth_devices; d->next != eth_devices; d = d->next) | |
198 | ; | |
199 | d->next = dev; | |
200 | } | |
201 | ||
202 | dev->state = ETH_STATE_INIT; | |
203 | dev->next = eth_devices; | |
204 | dev->index = index++; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | int eth_unregister(struct eth_device *dev) | |
210 | { | |
211 | struct eth_device *cur; | |
212 | ||
213 | /* No device */ | |
214 | if (!eth_devices) | |
215 | return -ENODEV; | |
216 | ||
217 | for (cur = eth_devices; cur->next != eth_devices && cur->next != dev; | |
218 | cur = cur->next) | |
219 | ; | |
220 | ||
221 | /* Device not found */ | |
222 | if (cur->next != dev) | |
223 | return -ENODEV; | |
224 | ||
225 | cur->next = dev->next; | |
226 | ||
227 | if (eth_devices == dev) | |
228 | eth_devices = dev->next == eth_devices ? NULL : dev->next; | |
229 | ||
230 | if (eth_current == dev) { | |
231 | eth_current = eth_devices; | |
232 | eth_current_changed(); | |
233 | } | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | int eth_initialize(void) | |
239 | { | |
240 | int num_devices = 0; | |
241 | ||
242 | eth_devices = NULL; | |
243 | eth_current = NULL; | |
244 | eth_common_init(); | |
245 | /* | |
246 | * If board-specific initialization exists, call it. | |
247 | * If not, call a CPU-specific one | |
248 | */ | |
249 | if (board_eth_init != __def_eth_init) { | |
250 | if (board_eth_init(gd->bd) < 0) | |
251 | printf("Board Net Initialization Failed\n"); | |
252 | } else if (cpu_eth_init != __def_eth_init) { | |
253 | if (cpu_eth_init(gd->bd) < 0) | |
254 | printf("CPU Net Initialization Failed\n"); | |
255 | } else { | |
256 | printf("Net Initialization Skipped\n"); | |
257 | } | |
258 | ||
259 | if (!eth_devices) { | |
260 | puts("No ethernet found.\n"); | |
261 | bootstage_error(BOOTSTAGE_ID_NET_ETH_START); | |
262 | } else { | |
263 | struct eth_device *dev = eth_devices; | |
264 | char *ethprime = env_get("ethprime"); | |
265 | ||
266 | bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT); | |
267 | do { | |
268 | if (dev->index) | |
269 | puts(", "); | |
270 | ||
271 | printf("%s", dev->name); | |
272 | ||
273 | if (ethprime && strcmp(dev->name, ethprime) == 0) { | |
274 | eth_current = dev; | |
275 | puts(" [PRIME]"); | |
276 | } | |
277 | ||
278 | if (strchr(dev->name, ' ')) | |
279 | puts("\nWarning: eth device name has a space!" | |
280 | "\n"); | |
281 | ||
282 | eth_write_hwaddr(dev, "eth", dev->index); | |
283 | ||
284 | dev = dev->next; | |
285 | num_devices++; | |
286 | } while (dev != eth_devices); | |
287 | ||
288 | eth_current_changed(); | |
289 | putc('\n'); | |
290 | } | |
291 | ||
292 | return num_devices; | |
293 | } | |
294 | ||
295 | #ifdef CONFIG_MCAST_TFTP | |
296 | /* Multicast. | |
297 | * mcast_addr: multicast ipaddr from which multicast Mac is made | |
298 | * join: 1=join, 0=leave. | |
299 | */ | |
300 | int eth_mcast_join(struct in_addr mcast_ip, int join) | |
301 | { | |
302 | u8 mcast_mac[ARP_HLEN]; | |
303 | if (!eth_current || !eth_current->mcast) | |
304 | return -1; | |
305 | mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff; | |
306 | mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff; | |
307 | mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f; | |
308 | mcast_mac[2] = 0x5e; | |
309 | mcast_mac[1] = 0x0; | |
310 | mcast_mac[0] = 0x1; | |
311 | return eth_current->mcast(eth_current, mcast_mac, join); | |
312 | } | |
313 | ||
314 | /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c | |
315 | * and this is the ethernet-crc method needed for TSEC -- and perhaps | |
316 | * some other adapter -- hash tables | |
317 | */ | |
318 | #define CRCPOLY_LE 0xedb88320 | |
319 | u32 ether_crc(size_t len, unsigned char const *p) | |
320 | { | |
321 | int i; | |
322 | u32 crc; | |
323 | crc = ~0; | |
324 | while (len--) { | |
325 | crc ^= *p++; | |
326 | for (i = 0; i < 8; i++) | |
327 | crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); | |
328 | } | |
329 | /* an reverse the bits, cuz of way they arrive -- last-first */ | |
330 | crc = (crc >> 16) | (crc << 16); | |
331 | crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00); | |
332 | crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0); | |
333 | crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc); | |
334 | crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa); | |
335 | return crc; | |
336 | } | |
337 | ||
338 | #endif | |
339 | ||
340 | ||
341 | int eth_init(void) | |
342 | { | |
343 | struct eth_device *old_current; | |
344 | ||
345 | if (!eth_current) { | |
346 | puts("No ethernet found.\n"); | |
347 | return -ENODEV; | |
348 | } | |
349 | ||
350 | old_current = eth_current; | |
351 | do { | |
352 | debug("Trying %s\n", eth_current->name); | |
353 | ||
354 | if (eth_current->init(eth_current, gd->bd) >= 0) { | |
355 | eth_current->state = ETH_STATE_ACTIVE; | |
356 | ||
357 | return 0; | |
358 | } | |
359 | debug("FAIL\n"); | |
360 | ||
361 | eth_try_another(0); | |
362 | } while (old_current != eth_current); | |
363 | ||
364 | return -ETIMEDOUT; | |
365 | } | |
366 | ||
367 | void eth_halt(void) | |
368 | { | |
369 | if (!eth_current) | |
370 | return; | |
371 | ||
372 | eth_current->halt(eth_current); | |
373 | ||
374 | eth_current->state = ETH_STATE_PASSIVE; | |
375 | } | |
376 | ||
377 | int eth_is_active(struct eth_device *dev) | |
378 | { | |
379 | return dev && dev->state == ETH_STATE_ACTIVE; | |
380 | } | |
381 | ||
382 | int eth_send(void *packet, int length) | |
383 | { | |
384 | if (!eth_current) | |
385 | return -ENODEV; | |
386 | ||
387 | return eth_current->send(eth_current, packet, length); | |
388 | } | |
389 | ||
390 | int eth_rx(void) | |
391 | { | |
392 | if (!eth_current) | |
393 | return -ENODEV; | |
394 | ||
395 | return eth_current->recv(eth_current); | |
396 | } | |
397 | ||
398 | #ifdef CONFIG_API | |
399 | static void eth_save_packet(void *packet, int length) | |
400 | { | |
401 | char *p = packet; | |
402 | int i; | |
403 | ||
404 | if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current) | |
405 | return; | |
406 | ||
407 | if (PKTSIZE < length) | |
408 | return; | |
409 | ||
410 | for (i = 0; i < length; i++) | |
411 | eth_rcv_bufs[eth_rcv_last].data[i] = p[i]; | |
412 | ||
413 | eth_rcv_bufs[eth_rcv_last].length = length; | |
414 | eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX; | |
415 | } | |
416 | ||
417 | int eth_receive(void *packet, int length) | |
418 | { | |
419 | char *p = packet; | |
420 | void *pp = push_packet; | |
421 | int i; | |
422 | ||
423 | if (eth_rcv_current == eth_rcv_last) { | |
424 | push_packet = eth_save_packet; | |
425 | eth_rx(); | |
426 | push_packet = pp; | |
427 | ||
428 | if (eth_rcv_current == eth_rcv_last) | |
429 | return -1; | |
430 | } | |
431 | ||
432 | length = min(eth_rcv_bufs[eth_rcv_current].length, length); | |
433 | ||
434 | for (i = 0; i < length; i++) | |
435 | p[i] = eth_rcv_bufs[eth_rcv_current].data[i]; | |
436 | ||
437 | eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX; | |
438 | return length; | |
439 | } | |
440 | #endif /* CONFIG_API */ |