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8#include "qemu/osdep.h"
9#include "hw/hw.h"
10#include "net/net.h"
11#include "hw/m68k/mcf.h"
12#include "hw/m68k/mcf_fec.h"
13#include "hw/net/mii.h"
14#include "hw/sysbus.h"
15
16#include <zlib.h>
17
18
19
20#ifdef DEBUG_FEC
21#define DPRINTF(fmt, ...) \
22do { printf("mcf_fec: " fmt , ## __VA_ARGS__); } while (0)
23#else
24#define DPRINTF(fmt, ...) do {} while(0)
25#endif
26
27#define FEC_MAX_DESC 1024
28#define FEC_MAX_FRAME_SIZE 2032
29#define FEC_MIB_SIZE 64
30
31typedef struct {
32 SysBusDevice parent_obj;
33
34 MemoryRegion iomem;
35 qemu_irq irq[FEC_NUM_IRQ];
36 NICState *nic;
37 NICConf conf;
38 uint32_t irq_state;
39 uint32_t eir;
40 uint32_t eimr;
41 int rx_enabled;
42 uint32_t rx_descriptor;
43 uint32_t tx_descriptor;
44 uint32_t ecr;
45 uint32_t mmfr;
46 uint32_t mscr;
47 uint32_t rcr;
48 uint32_t tcr;
49 uint32_t tfwr;
50 uint32_t rfsr;
51 uint32_t erdsr;
52 uint32_t etdsr;
53 uint32_t emrbr;
54 uint32_t mib[FEC_MIB_SIZE];
55} mcf_fec_state;
56
57#define FEC_INT_HB 0x80000000
58#define FEC_INT_BABR 0x40000000
59#define FEC_INT_BABT 0x20000000
60#define FEC_INT_GRA 0x10000000
61#define FEC_INT_TXF 0x08000000
62#define FEC_INT_TXB 0x04000000
63#define FEC_INT_RXF 0x02000000
64#define FEC_INT_RXB 0x01000000
65#define FEC_INT_MII 0x00800000
66#define FEC_INT_EB 0x00400000
67#define FEC_INT_LC 0x00200000
68#define FEC_INT_RL 0x00100000
69#define FEC_INT_UN 0x00080000
70
71#define FEC_EN 2
72#define FEC_RESET 1
73
74
75static const uint32_t mcf_fec_irq_map[FEC_NUM_IRQ] = {
76 FEC_INT_TXF,
77 FEC_INT_TXB,
78 FEC_INT_UN,
79 FEC_INT_RL,
80 FEC_INT_RXF,
81 FEC_INT_RXB,
82 FEC_INT_MII,
83 FEC_INT_LC,
84 FEC_INT_HB,
85 FEC_INT_GRA,
86 FEC_INT_EB,
87 FEC_INT_BABT,
88 FEC_INT_BABR
89};
90
91
92typedef struct {
93 uint16_t flags;
94 uint16_t length;
95 uint32_t data;
96} mcf_fec_bd;
97
98#define FEC_BD_R 0x8000
99#define FEC_BD_E 0x8000
100#define FEC_BD_O1 0x4000
101#define FEC_BD_W 0x2000
102#define FEC_BD_O2 0x1000
103#define FEC_BD_L 0x0800
104#define FEC_BD_TC 0x0400
105#define FEC_BD_ABC 0x0200
106#define FEC_BD_M 0x0100
107#define FEC_BD_BC 0x0080
108#define FEC_BD_MC 0x0040
109#define FEC_BD_LG 0x0020
110#define FEC_BD_NO 0x0010
111#define FEC_BD_CR 0x0004
112#define FEC_BD_OV 0x0002
113#define FEC_BD_TR 0x0001
114
115#define MIB_RMON_T_DROP 0
116#define MIB_RMON_T_PACKETS 1
117#define MIB_RMON_T_BC_PKT 2
118#define MIB_RMON_T_MC_PKT 3
119#define MIB_RMON_T_CRC_ALIGN 4
120#define MIB_RMON_T_UNDERSIZE 5
121#define MIB_RMON_T_OVERSIZE 6
122#define MIB_RMON_T_FRAG 7
123#define MIB_RMON_T_JAB 8
124#define MIB_RMON_T_COL 9
125#define MIB_RMON_T_P64 10
126#define MIB_RMON_T_P65TO127 11
127#define MIB_RMON_T_P128TO255 12
128#define MIB_RMON_T_P256TO511 13
129#define MIB_RMON_T_P512TO1023 14
130#define MIB_RMON_T_P1024TO2047 15
131#define MIB_RMON_T_P_GTE2048 16
132#define MIB_RMON_T_OCTETS 17
133#define MIB_IEEE_T_DROP 18
134#define MIB_IEEE_T_FRAME_OK 19
135#define MIB_IEEE_T_1COL 20
136#define MIB_IEEE_T_MCOL 21
137#define MIB_IEEE_T_DEF 22
138#define MIB_IEEE_T_LCOL 23
139#define MIB_IEEE_T_EXCOL 24
140#define MIB_IEEE_T_MACERR 25
141#define MIB_IEEE_T_CSERR 26
142#define MIB_IEEE_T_SQE 27
143#define MIB_IEEE_T_FDXFC 28
144#define MIB_IEEE_T_OCTETS_OK 29
145
146#define MIB_RMON_R_DROP 32
147#define MIB_RMON_R_PACKETS 33
148#define MIB_RMON_R_BC_PKT 34
149#define MIB_RMON_R_MC_PKT 35
150#define MIB_RMON_R_CRC_ALIGN 36
151#define MIB_RMON_R_UNDERSIZE 37
152#define MIB_RMON_R_OVERSIZE 38
153#define MIB_RMON_R_FRAG 39
154#define MIB_RMON_R_JAB 40
155#define MIB_RMON_R_RESVD_0 41
156#define MIB_RMON_R_P64 42
157#define MIB_RMON_R_P65TO127 43
158#define MIB_RMON_R_P128TO255 44
159#define MIB_RMON_R_P256TO511 45
160#define MIB_RMON_R_P512TO1023 46
161#define MIB_RMON_R_P1024TO2047 47
162#define MIB_RMON_R_P_GTE2048 48
163#define MIB_RMON_R_OCTETS 49
164#define MIB_IEEE_R_DROP 50
165#define MIB_IEEE_R_FRAME_OK 51
166#define MIB_IEEE_R_CRC 52
167#define MIB_IEEE_R_ALIGN 53
168#define MIB_IEEE_R_MACERR 54
169#define MIB_IEEE_R_FDXFC 55
170#define MIB_IEEE_R_OCTETS_OK 56
171
172static void mcf_fec_read_bd(mcf_fec_bd *bd, uint32_t addr)
173{
174 cpu_physical_memory_read(addr, bd, sizeof(*bd));
175 be16_to_cpus(&bd->flags);
176 be16_to_cpus(&bd->length);
177 be32_to_cpus(&bd->data);
178}
179
180static void mcf_fec_write_bd(mcf_fec_bd *bd, uint32_t addr)
181{
182 mcf_fec_bd tmp;
183 tmp.flags = cpu_to_be16(bd->flags);
184 tmp.length = cpu_to_be16(bd->length);
185 tmp.data = cpu_to_be32(bd->data);
186 cpu_physical_memory_write(addr, &tmp, sizeof(tmp));
187}
188
189static void mcf_fec_update(mcf_fec_state *s)
190{
191 uint32_t active;
192 uint32_t changed;
193 uint32_t mask;
194 int i;
195
196 active = s->eir & s->eimr;
197 changed = active ^s->irq_state;
198 for (i = 0; i < FEC_NUM_IRQ; i++) {
199 mask = mcf_fec_irq_map[i];
200 if (changed & mask) {
201 DPRINTF("IRQ %d = %d\n", i, (active & mask) != 0);
202 qemu_set_irq(s->irq[i], (active & mask) != 0);
203 }
204 }
205 s->irq_state = active;
206}
207
208static void mcf_fec_tx_stats(mcf_fec_state *s, int size)
209{
210 s->mib[MIB_RMON_T_PACKETS]++;
211 s->mib[MIB_RMON_T_OCTETS] += size;
212 if (size < 64) {
213 s->mib[MIB_RMON_T_FRAG]++;
214 } else if (size == 64) {
215 s->mib[MIB_RMON_T_P64]++;
216 } else if (size < 128) {
217 s->mib[MIB_RMON_T_P65TO127]++;
218 } else if (size < 256) {
219 s->mib[MIB_RMON_T_P128TO255]++;
220 } else if (size < 512) {
221 s->mib[MIB_RMON_T_P256TO511]++;
222 } else if (size < 1024) {
223 s->mib[MIB_RMON_T_P512TO1023]++;
224 } else if (size < 2048) {
225 s->mib[MIB_RMON_T_P1024TO2047]++;
226 } else {
227 s->mib[MIB_RMON_T_P_GTE2048]++;
228 }
229 s->mib[MIB_IEEE_T_FRAME_OK]++;
230 s->mib[MIB_IEEE_T_OCTETS_OK] += size;
231}
232
233static void mcf_fec_do_tx(mcf_fec_state *s)
234{
235 uint32_t addr;
236 mcf_fec_bd bd;
237 int frame_size;
238 int len, descnt = 0;
239 uint8_t frame[FEC_MAX_FRAME_SIZE];
240 uint8_t *ptr;
241
242 DPRINTF("do_tx\n");
243 ptr = frame;
244 frame_size = 0;
245 addr = s->tx_descriptor;
246 while (descnt++ < FEC_MAX_DESC) {
247 mcf_fec_read_bd(&bd, addr);
248 DPRINTF("tx_bd %x flags %04x len %d data %08x\n",
249 addr, bd.flags, bd.length, bd.data);
250 if ((bd.flags & FEC_BD_R) == 0) {
251
252 break;
253 }
254 len = bd.length;
255 if (frame_size + len > FEC_MAX_FRAME_SIZE) {
256 len = FEC_MAX_FRAME_SIZE - frame_size;
257 s->eir |= FEC_INT_BABT;
258 }
259 cpu_physical_memory_read(bd.data, ptr, len);
260 ptr += len;
261 frame_size += len;
262 if (bd.flags & FEC_BD_L) {
263
264 DPRINTF("Sending packet\n");
265 qemu_send_packet(qemu_get_queue(s->nic), frame, frame_size);
266 mcf_fec_tx_stats(s, frame_size);
267 ptr = frame;
268 frame_size = 0;
269 s->eir |= FEC_INT_TXF;
270 }
271 s->eir |= FEC_INT_TXB;
272 bd.flags &= ~FEC_BD_R;
273
274 mcf_fec_write_bd(&bd, addr);
275
276 if ((bd.flags & FEC_BD_W) != 0) {
277 addr = s->etdsr;
278 } else {
279 addr += 8;
280 }
281 }
282 s->tx_descriptor = addr;
283}
284
285static void mcf_fec_enable_rx(mcf_fec_state *s)
286{
287 NetClientState *nc = qemu_get_queue(s->nic);
288 mcf_fec_bd bd;
289
290 mcf_fec_read_bd(&bd, s->rx_descriptor);
291 s->rx_enabled = ((bd.flags & FEC_BD_E) != 0);
292 if (s->rx_enabled) {
293 qemu_flush_queued_packets(nc);
294 }
295}
296
297static void mcf_fec_reset(DeviceState *dev)
298{
299 mcf_fec_state *s = MCF_FEC_NET(dev);
300
301 s->eir = 0;
302 s->eimr = 0;
303 s->rx_enabled = 0;
304 s->ecr = 0;
305 s->mscr = 0;
306 s->rcr = 0x05ee0001;
307 s->tcr = 0;
308 s->tfwr = 0;
309 s->rfsr = 0x500;
310}
311
312#define MMFR_WRITE_OP (1 << 28)
313#define MMFR_READ_OP (2 << 28)
314#define MMFR_PHYADDR(v) (((v) >> 23) & 0x1f)
315#define MMFR_REGNUM(v) (((v) >> 18) & 0x1f)
316
317static uint64_t mcf_fec_read_mdio(mcf_fec_state *s)
318{
319 uint64_t v;
320
321 if (s->mmfr & MMFR_WRITE_OP)
322 return s->mmfr;
323 if (MMFR_PHYADDR(s->mmfr) != 1)
324 return s->mmfr |= 0xffff;
325
326 switch (MMFR_REGNUM(s->mmfr)) {
327 case MII_BMCR:
328 v = MII_BMCR_SPEED | MII_BMCR_AUTOEN | MII_BMCR_FD;
329 break;
330 case MII_BMSR:
331 v = MII_BMSR_100TX_FD | MII_BMSR_100TX_HD | MII_BMSR_10T_FD |
332 MII_BMSR_10T_HD | MII_BMSR_MFPS | MII_BMSR_AN_COMP |
333 MII_BMSR_AUTONEG | MII_BMSR_LINK_ST;
334 break;
335 case MII_PHYID1:
336 v = DP83848_PHYID1;
337 break;
338 case MII_PHYID2:
339 v = DP83848_PHYID2;
340 break;
341 case MII_ANAR:
342 v = MII_ANAR_TXFD | MII_ANAR_TX | MII_ANAR_10FD |
343 MII_ANAR_10 | MII_ANAR_CSMACD;
344 break;
345 case MII_ANLPAR:
346 v = MII_ANLPAR_ACK | MII_ANLPAR_TXFD | MII_ANLPAR_TX |
347 MII_ANLPAR_10FD | MII_ANLPAR_10 | MII_ANLPAR_CSMACD;
348 break;
349 default:
350 v = 0xffff;
351 break;
352 }
353 s->mmfr = (s->mmfr & ~0xffff) | v;
354 return s->mmfr;
355}
356
357static uint64_t mcf_fec_read(void *opaque, hwaddr addr,
358 unsigned size)
359{
360 mcf_fec_state *s = (mcf_fec_state *)opaque;
361 switch (addr & 0x3ff) {
362 case 0x004: return s->eir;
363 case 0x008: return s->eimr;
364 case 0x010: return s->rx_enabled ? (1 << 24) : 0;
365 case 0x014: return 0;
366 case 0x024: return s->ecr;
367 case 0x040: return mcf_fec_read_mdio(s);
368 case 0x044: return s->mscr;
369 case 0x064: return 0;
370 case 0x084: return s->rcr;
371 case 0x0c4: return s->tcr;
372 case 0x0e4:
373 return (s->conf.macaddr.a[0] << 24) | (s->conf.macaddr.a[1] << 16)
374 | (s->conf.macaddr.a[2] << 8) | s->conf.macaddr.a[3];
375 break;
376 case 0x0e8:
377 return (s->conf.macaddr.a[4] << 24) | (s->conf.macaddr.a[5] << 16) | 0x8808;
378 case 0x0ec: return 0x10000;
379 case 0x118: return 0;
380 case 0x11c: return 0;
381 case 0x120: return 0;
382 case 0x124: return 0;
383 case 0x144: return s->tfwr;
384 case 0x14c: return 0x600;
385 case 0x150: return s->rfsr;
386 case 0x180: return s->erdsr;
387 case 0x184: return s->etdsr;
388 case 0x188: return s->emrbr;
389 case 0x200 ... 0x2e0: return s->mib[(addr & 0x1ff) / 4];
390 default:
391 hw_error("mcf_fec_read: Bad address 0x%x\n", (int)addr);
392 return 0;
393 }
394}
395
396static void mcf_fec_write(void *opaque, hwaddr addr,
397 uint64_t value, unsigned size)
398{
399 mcf_fec_state *s = (mcf_fec_state *)opaque;
400 switch (addr & 0x3ff) {
401 case 0x004:
402 s->eir &= ~value;
403 break;
404 case 0x008:
405 s->eimr = value;
406 break;
407 case 0x010:
408 if ((s->ecr & FEC_EN) && !s->rx_enabled) {
409 DPRINTF("RX enable\n");
410 mcf_fec_enable_rx(s);
411 }
412 break;
413 case 0x014:
414 if (s->ecr & FEC_EN) {
415 mcf_fec_do_tx(s);
416 }
417 break;
418 case 0x024:
419 s->ecr = value;
420 if (value & FEC_RESET) {
421 DPRINTF("Reset\n");
422 mcf_fec_reset(opaque);
423 }
424 if ((s->ecr & FEC_EN) == 0) {
425 s->rx_enabled = 0;
426 }
427 break;
428 case 0x040:
429 s->mmfr = value;
430 s->eir |= FEC_INT_MII;
431 break;
432 case 0x044:
433 s->mscr = value & 0xfe;
434 break;
435 case 0x064:
436
437 break;
438 case 0x084:
439 s->rcr = value & 0x07ff003f;
440
441 break;
442 case 0x0c4:
443
444 s->tcr = value;
445 if (value & 1)
446 s->eir |= FEC_INT_GRA;
447 break;
448 case 0x0e4:
449 s->conf.macaddr.a[0] = value >> 24;
450 s->conf.macaddr.a[1] = value >> 16;
451 s->conf.macaddr.a[2] = value >> 8;
452 s->conf.macaddr.a[3] = value;
453 break;
454 case 0x0e8:
455 s->conf.macaddr.a[4] = value >> 24;
456 s->conf.macaddr.a[5] = value >> 16;
457 break;
458 case 0x0ec:
459
460 break;
461 case 0x118:
462 case 0x11c:
463 case 0x120:
464 case 0x124:
465
466 break;
467 case 0x144:
468 s->tfwr = value & 3;
469 break;
470 case 0x14c:
471
472 break;
473 case 0x150:
474 s->rfsr = (value & 0x3fc) | 0x400;
475 break;
476 case 0x180:
477 s->erdsr = value & ~3;
478 s->rx_descriptor = s->erdsr;
479 break;
480 case 0x184:
481 s->etdsr = value & ~3;
482 s->tx_descriptor = s->etdsr;
483 break;
484 case 0x188:
485 s->emrbr = value > 0 ? value & 0x7F0 : 0x7F0;
486 break;
487 case 0x200 ... 0x2e0:
488 s->mib[(addr & 0x1ff) / 4] = value;
489 break;
490 default:
491 hw_error("mcf_fec_write Bad address 0x%x\n", (int)addr);
492 }
493 mcf_fec_update(s);
494}
495
496static void mcf_fec_rx_stats(mcf_fec_state *s, int size)
497{
498 s->mib[MIB_RMON_R_PACKETS]++;
499 s->mib[MIB_RMON_R_OCTETS] += size;
500 if (size < 64) {
501 s->mib[MIB_RMON_R_FRAG]++;
502 } else if (size == 64) {
503 s->mib[MIB_RMON_R_P64]++;
504 } else if (size < 128) {
505 s->mib[MIB_RMON_R_P65TO127]++;
506 } else if (size < 256) {
507 s->mib[MIB_RMON_R_P128TO255]++;
508 } else if (size < 512) {
509 s->mib[MIB_RMON_R_P256TO511]++;
510 } else if (size < 1024) {
511 s->mib[MIB_RMON_R_P512TO1023]++;
512 } else if (size < 2048) {
513 s->mib[MIB_RMON_R_P1024TO2047]++;
514 } else {
515 s->mib[MIB_RMON_R_P_GTE2048]++;
516 }
517 s->mib[MIB_IEEE_R_FRAME_OK]++;
518 s->mib[MIB_IEEE_R_OCTETS_OK] += size;
519}
520
521static int mcf_fec_have_receive_space(mcf_fec_state *s, size_t want)
522{
523 mcf_fec_bd bd;
524 uint32_t addr;
525
526
527 addr = s->rx_descriptor;
528 while (want > 0) {
529 mcf_fec_read_bd(&bd, addr);
530 if ((bd.flags & FEC_BD_E) == 0) {
531 return 0;
532 }
533 if (want < s->emrbr) {
534 return 1;
535 }
536 want -= s->emrbr;
537
538 if ((bd.flags & FEC_BD_W) != 0) {
539 addr = s->erdsr;
540 } else {
541 addr += 8;
542 }
543 }
544 return 0;
545}
546
547static ssize_t mcf_fec_receive(NetClientState *nc, const uint8_t *buf, size_t size)
548{
549 mcf_fec_state *s = qemu_get_nic_opaque(nc);
550 mcf_fec_bd bd;
551 uint32_t flags = 0;
552 uint32_t addr;
553 uint32_t crc;
554 uint32_t buf_addr;
555 uint8_t *crc_ptr;
556 unsigned int buf_len;
557 size_t retsize;
558
559 DPRINTF("do_rx len %d\n", size);
560 if (!s->rx_enabled) {
561 return -1;
562 }
563
564 size += 4;
565 crc = cpu_to_be32(crc32(~0, buf, size));
566 crc_ptr = (uint8_t *)&crc;
567
568 if (size > FEC_MAX_FRAME_SIZE) {
569 size = FEC_MAX_FRAME_SIZE;
570 flags |= FEC_BD_TR | FEC_BD_LG;
571 }
572
573 if (size > (s->rcr >> 16)) {
574 flags |= FEC_BD_LG;
575 }
576
577 if (!mcf_fec_have_receive_space(s, size)) {
578 return 0;
579 }
580 addr = s->rx_descriptor;
581 retsize = size;
582 while (size > 0) {
583 mcf_fec_read_bd(&bd, addr);
584 buf_len = (size <= s->emrbr) ? size: s->emrbr;
585 bd.length = buf_len;
586 size -= buf_len;
587 DPRINTF("rx_bd %x length %d\n", addr, bd.length);
588
589 if (size < 4)
590 buf_len += size - 4;
591 buf_addr = bd.data;
592 cpu_physical_memory_write(buf_addr, buf, buf_len);
593 buf += buf_len;
594 if (size < 4) {
595 cpu_physical_memory_write(buf_addr + buf_len, crc_ptr, 4 - size);
596 crc_ptr += 4 - size;
597 }
598 bd.flags &= ~FEC_BD_E;
599 if (size == 0) {
600
601 bd.flags |= flags | FEC_BD_L;
602 DPRINTF("rx frame flags %04x\n", bd.flags);
603 s->eir |= FEC_INT_RXF;
604 } else {
605 s->eir |= FEC_INT_RXB;
606 }
607 mcf_fec_write_bd(&bd, addr);
608
609 if ((bd.flags & FEC_BD_W) != 0) {
610 addr = s->erdsr;
611 } else {
612 addr += 8;
613 }
614 }
615 s->rx_descriptor = addr;
616 mcf_fec_rx_stats(s, retsize);
617 mcf_fec_enable_rx(s);
618 mcf_fec_update(s);
619 return retsize;
620}
621
622static const MemoryRegionOps mcf_fec_ops = {
623 .read = mcf_fec_read,
624 .write = mcf_fec_write,
625 .endianness = DEVICE_NATIVE_ENDIAN,
626};
627
628static NetClientInfo net_mcf_fec_info = {
629 .type = NET_CLIENT_DRIVER_NIC,
630 .size = sizeof(NICState),
631 .receive = mcf_fec_receive,
632};
633
634static void mcf_fec_realize(DeviceState *dev, Error **errp)
635{
636 mcf_fec_state *s = MCF_FEC_NET(dev);
637
638 s->nic = qemu_new_nic(&net_mcf_fec_info, &s->conf,
639 object_get_typename(OBJECT(dev)), dev->id, s);
640 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
641}
642
643static void mcf_fec_instance_init(Object *obj)
644{
645 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
646 mcf_fec_state *s = MCF_FEC_NET(obj);
647 int i;
648
649 memory_region_init_io(&s->iomem, obj, &mcf_fec_ops, s, "fec", 0x400);
650 sysbus_init_mmio(sbd, &s->iomem);
651 for (i = 0; i < FEC_NUM_IRQ; i++) {
652 sysbus_init_irq(sbd, &s->irq[i]);
653 }
654}
655
656static Property mcf_fec_properties[] = {
657 DEFINE_NIC_PROPERTIES(mcf_fec_state, conf),
658 DEFINE_PROP_END_OF_LIST(),
659};
660
661static void mcf_fec_class_init(ObjectClass *oc, void *data)
662{
663 DeviceClass *dc = DEVICE_CLASS(oc);
664
665 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
666 dc->realize = mcf_fec_realize;
667 dc->desc = "MCF Fast Ethernet Controller network device";
668 dc->reset = mcf_fec_reset;
669 dc->props = mcf_fec_properties;
670}
671
672static const TypeInfo mcf_fec_info = {
673 .name = TYPE_MCF_FEC_NET,
674 .parent = TYPE_SYS_BUS_DEVICE,
675 .instance_size = sizeof(mcf_fec_state),
676 .instance_init = mcf_fec_instance_init,
677 .class_init = mcf_fec_class_init,
678};
679
680static void mcf_fec_register_types(void)
681{
682 type_register_static(&mcf_fec_info);
683}
684
685type_init(mcf_fec_register_types)
686