- setup interrupt last
[dragonfly.git] / sys / dev / netif / sbsh / if_sbsh.c
CommitLineData
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1/**
2 * Granch SBNI16 G.SHDSL Modem driver
3 * Written by Denis I. Timofeev, 2002-2003.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/dev/sbsh/if_sbsh.c,v 1.3.2.1 2003/04/15 18:15:07 fjoe Exp $
2622061f 27 * $DragonFly: src/sys/dev/netif/sbsh/if_sbsh.c,v 1.19 2005/06/12 17:44:29 joerg Exp $
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28 */
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/sockio.h>
33#include <sys/mbuf.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/proc.h>
37#include <sys/socket.h>
38#include <sys/random.h>
2622061f 39#include <sys/thread2.h>
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40
41#include <net/if.h>
b17ec354 42#include <net/ifq_var.h>
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43#include <net/if_arp.h>
44#include <net/ethernet.h>
45#include <net/if_media.h>
46
47#include <net/bpf.h>
48
49#include <vm/vm.h>
50#include <vm/pmap.h>
51#include <machine/bus.h>
52#include <machine/resource.h>
53#include <sys/bus.h>
54#include <sys/rman.h>
55
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56#include <bus/pci/pcireg.h>
57#include <bus/pci/pcivar.h>
984263bc 58
1f2de5d4 59#include "if_sbshreg.h"
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60
61/* -------------------------------------------------------------------------- */
62
63struct sbni16_hw_regs {
64 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR;
65};
66
67struct hw_descr {
68 u_int32_t address;
69 u_int32_t length;
70};
71
72struct cx28975_cmdarea {
73 u_int8_t intr_host;
74 u_int8_t intr_8051;
75 u_int8_t map_version;
76
77 u_int8_t in_dest;
78 u_int8_t in_opcode;
79 u_int8_t in_zero;
80 u_int8_t in_length;
81 u_int8_t in_csum;
82 u_int8_t in_data[75];
83 u_int8_t in_datasum;
84
85 u_int8_t out_dest;
86 u_int8_t out_opcode;
87 u_int8_t out_ack;
88 u_int8_t out_length;
89 u_int8_t out_csum;
90 u_int8_t out_data[75];
91 u_int8_t out_datasum;
92};
93
94#define XQLEN 8
95#define RQLEN 8
96
97struct sbsh_softc {
98 struct arpcom arpcom; /* ethernet common */
99
100 struct resource *mem_res;
101 struct resource *irq_res;
102 void *intr_hand;
103
104 void *mem_base; /* mapped memory address */
105
106 volatile struct sbni16_hw_regs *regs;
107 volatile struct hw_descr *tbd;
108 volatile struct hw_descr *rbd;
109 volatile struct cx28975_cmdarea *cmdp;
110
111 /* SBNI16 controller statistics */
112 struct sbni16_stats {
113 u_int32_t sent_pkts, rcvd_pkts;
114 u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time;
115 } in_stats;
116
117 /* transmit and reception queues */
118 struct mbuf *xq[XQLEN], *rq[RQLEN];
119 unsigned head_xq, tail_xq, head_rq, tail_rq;
120
121 /* the descriptors mapped onto the first buffers in xq and rq */
122 unsigned head_tdesc, head_rdesc;
123 u_int8_t state;
124};
125
126struct cx28975_cfg {
127 u_int8_t *firmw_image;
128 u_int32_t firmw_len;
129 u_int32_t lrate: 10;
130 u_int32_t master: 1;
131 u_int32_t mod: 2;
132 u_int32_t crc16: 1;
133 u_int32_t fill_7e: 1;
134 u_int32_t inv: 1;
135 u_int32_t rburst: 1;
136 u_int32_t wburst: 1;
137 u_int32_t : 14;
138};
139
140/* SHDSL transceiver statistics */
141struct dsl_stats {
142 u_int8_t status_1, status_3;
143 u_int8_t attenuat, nmr, tpbo, rpbo;
144 u_int16_t losw, segd, crc, sega, losd;
145};
146
147enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE };
148
149#define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq)
150#define SIOCGETSTATS _IOWR('i', 68, struct ifreq)
151#define SIOCCLRSTATS _IOWR('i', 69, struct ifreq)
152
153static int sbsh_probe(device_t);
154static int sbsh_attach(device_t);
155static int sbsh_detach(device_t);
bd4539cc 156static int sbsh_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
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157static void sbsh_shutdown(device_t);
158static int sbsh_suspend(device_t);
159static int sbsh_resume(device_t);
160static void sbsh_watchdog(struct ifnet *);
161
162static void sbsh_start(struct ifnet *);
163static void sbsh_init(void *);
164static void sbsh_stop(struct sbsh_softc *);
165static void init_card(struct sbsh_softc *);
166static void sbsh_intr(void *);
167static void resume_tx(struct sbsh_softc *);
168static void start_xmit_frames(struct sbsh_softc *);
169static void encap_frame(struct sbsh_softc *, struct mbuf *);
170static struct mbuf * repack(struct sbsh_softc *, struct mbuf *);
171static void free_sent_buffers(struct sbsh_softc *);
172static void alloc_rx_buffers(struct sbsh_softc *);
173static void indicate_frames(struct sbsh_softc *);
174static void drop_queues(struct sbsh_softc *);
175static void activate(struct sbsh_softc *);
176static void deactivate(struct sbsh_softc *);
177static void cx28975_interrupt(struct sbsh_softc *);
178static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg);
179static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t);
180static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t,
181 u_int8_t *, u_int8_t);
182
183static device_method_t sbsh_methods[] = {
184 /* Device interface */
185 DEVMETHOD(device_probe, sbsh_probe),
186 DEVMETHOD(device_attach, sbsh_attach),
187 DEVMETHOD(device_detach, sbsh_detach),
188 DEVMETHOD(device_shutdown, sbsh_shutdown),
189 DEVMETHOD(device_suspend, sbsh_suspend),
190 DEVMETHOD(device_resume, sbsh_resume),
191
192 { 0, 0 }
193};
194
195static driver_t sbsh_driver = {
196 "sbsh",
197 sbsh_methods,
198 sizeof(struct sbsh_softc)
199};
200
201static devclass_t sbsh_devclass;
202
32832096 203DECLARE_DUMMY_MODULE(if_sbsh);
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204DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, 0, 0);
205
206static int
207sbsh_probe(device_t dev)
208{
209 if (pci_get_vendor(dev) != SBNI16_VENDOR
210 || pci_get_device(dev) != SBNI16_DEVICE
211 || pci_get_subdevice(dev) != SBNI16_SUBDEV)
212 return (ENXIO);
213
214 device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem");
215 return (0);
216}
217
218static int
219sbsh_attach(device_t dev)
220{
221 struct sbsh_softc *sc;
222 struct ifnet *ifp;
2622061f 223 int unit, error = 0, rid;
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224
225 sc = device_get_softc(dev);
226 unit = device_get_unit(dev);
227
228 rid = PCIR_MAPS + 4;
229 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
230 0, ~0, 4096, RF_ACTIVE);
231
232 if (sc->mem_res == NULL) {
233 printf ("sbsh%d: couldn't map memory\n", unit);
234 error = ENXIO;
235 goto fail;
236 }
237
238 rid = 0;
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239 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
240 RF_SHAREABLE | RF_ACTIVE);
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241
242 if (sc->irq_res == NULL) {
243 printf("sbsh%d: couldn't map interrupt\n", unit);
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244 error = ENXIO;
245 goto fail;
246 }
247
248 sc->mem_base = rman_get_virtual(sc->mem_res);
249 init_card(sc);
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250 /* generate ethernet MAC address */
251 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
252 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2);
253
254 ifp = &sc->arpcom.ac_if;
255 ifp->if_softc = sc;
cdb7d804 256 if_initname(ifp, "sbsh", unit);
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257 ifp->if_mtu = ETHERMTU;
258 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
259 ifp->if_ioctl = sbsh_ioctl;
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260 ifp->if_start = sbsh_start;
261 ifp->if_watchdog = sbsh_watchdog;
262 ifp->if_init = sbsh_init;
263 ifp->if_baudrate = 4600000;
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264 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
265 ifq_set_ready(&ifp->if_snd);
984263bc 266
0a8b5977 267 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
984263bc 268
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269 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
270 sbsh_intr, sc, &sc->intr_hand, NULL);
271 if (error) {
272 ether_ifdetach(ifp);
273 printf("sbsh%d: couldn't set up irq\n", unit);
274 goto fail;
275 }
276
277 return(0);
278
984263bc 279fail:
2622061f 280 sbsh_detach(dev);
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281 return (error);
282}
283
284static int
285sbsh_detach(device_t dev)
286{
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287 struct sbsh_softc *sc = device_get_softc(dev);
288 struct ifnet *ifp = &sc->arpcom.ac_if;
984263bc 289
2622061f 290 crit_enter();
984263bc 291
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292 if (device_is_attached(dev)) {
293 sbsh_stop(sc);
294 ether_ifdetach(ifp);
295 }
984263bc 296
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297 if (sc->intr_hand)
298 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
299
300 crit_exit();
984263bc 301
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302 if (sc->irq_res)
303 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
304 if (sc->mem_res)
305 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4,
306 sc->mem_res);
984263bc 307
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308 return (0);
309}
310
311
312static void
313sbsh_start(struct ifnet *ifp)
314{
315 struct sbsh_softc *sc = ifp->if_softc;
984263bc 316
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317 crit_enter();
318
319 if (sc->state == ACTIVE)
320 start_xmit_frames(ifp->if_softc);
984263bc 321
2622061f 322 crit_exit();
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323}
324
325
326static void
327sbsh_init(void *xsc)
328{
329 struct sbsh_softc *sc = xsc;
330 struct ifnet *ifp = &sc->arpcom.ac_if;
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331 u_int8_t t;
332
2622061f 333 crit_enter();
984263bc 334
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335 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) {
336 crit_exit();
337 return;
338 }
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339
340 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
341 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0;
342 sc->head_tdesc = sc->head_rdesc = 0;
343
344 sc->regs->IMR = EXT;
345 t = 2;
346 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1);
347 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) {
348 sc->state = ACTIVATION;
349
350 ifp->if_flags |= IFF_RUNNING;
351 ifp->if_flags &= ~IFF_OACTIVE;
352 }
353
2622061f 354 crit_exit();
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355}
356
357
358static void
359sbsh_stop(struct sbsh_softc *sc)
360{
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361 u_int8_t t;
362
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363 crit_enter();
364
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365 sc->regs->IMR = EXT;
366
367 t = 0;
368 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1);
369 if (sc->state == ACTIVE) {
370 t = 1;
371 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1);
372 /* FIX! activation manager state */
373
374 /* Is it really must be done here? It calls from intr handler */
375 deactivate(sc);
376 }
377
378 sc->regs->IMR = 0;
379 sc->state = DOWN;
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380
381 crit_enter();
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382}
383
384
385static void
386init_card(struct sbsh_softc *sc)
387{
388 sc->state = NOT_LOADED;
389 sc->tbd = (struct hw_descr *) sc->mem_base;
390 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400);
391 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800);
392 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00);
393
394 sc->regs->CR = 0;
395 sc->regs->SR = 0xff;
396 sc->regs->IMR = 0;
397}
398
399
400static int
bd4539cc 401sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
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402{
403 struct sbsh_softc *sc = ifp->if_softc;
404 struct ifreq *ifr = (struct ifreq *) data;
405 struct cx28975_cfg cfg;
406 struct dsl_stats ds;
2622061f 407 int error = 0;
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408 u_int8_t t;
409
2622061f 410 crit_enter();
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411
412 switch(cmd) {
413 case SIOCLOADFIRMW:
bd4539cc 414 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0)
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415 break;
416 if (ifp->if_flags & IFF_UP)
417 error = EBUSY;
418
419 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg);
420 if (start_cx28975(sc, cfg) == 0) {
421 static char *modstr[] = {
422 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" };
423 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n",
424 cfg.master ? "master" : "slave",
425 cfg.lrate << 3, modstr[cfg.mod]);
426 } else {
427 if_printf(&sc->arpcom.ac_if,
428 "unable to load firmware\n");
429 error = EIO;
430 }
431 break;
432
433 case SIOCGETSTATS :
bd4539cc 434 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0)
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435 break;
436
437 t = 0;
438 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1))
439 error = EIO;
440 ds.attenuat = sc->cmdp->out_data[0];
441
442 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1))
443 error = EIO;
444 ds.nmr = sc->cmdp->out_data[0];
445
446 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1))
447 error = EIO;
448 ds.tpbo = sc->cmdp->out_data[0];
449 ds.rpbo = sc->cmdp->out_data[1];
450
451 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) {
452 int i;
453 for (i = 0; i < 10; ++i)
454 ((u_int8_t *) &ds.losw)[i] =
455 sc->cmdp->out_data[i];
456 } else
457 error = EIO;
458
459 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0];
460 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2];
461
462 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats));
f23061d4 463 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats),
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464 sizeof(struct dsl_stats));
465 break;
466
467 case SIOCCLRSTATS :
bd4539cc 468 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) {
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469 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
470 t = 2;
471 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1))
472 error = EIO;
473 }
474 break;
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475 case SIOCSIFFLAGS:
476 if (ifp->if_flags & IFF_UP) {
477 if (!(ifp->if_flags & IFF_RUNNING)) {
478 if (sc->state == NOT_LOADED) {
479 if_printf(ifp, "firmware wasn't loaded\n");
480 error = EBUSY;
481 } else
482 sbsh_init(sc);
483 }
484 } else {
485 if (ifp->if_flags & IFF_RUNNING) {
486 sbsh_stop(sc);
487 ifp->if_flags &= ~IFF_RUNNING;
488 }
489 }
490 break;
491
492 case SIOCADDMULTI:
493 case SIOCDELMULTI:
494 error = 0;
495 break;
984263bc 496 default:
4cde4dd5 497 error = ether_ioctl(ifp, cmd, data);
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498 break;
499 }
500
2622061f
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501 crit_exit();
502
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503 return (error);
504}
505
506
507static void
508sbsh_shutdown(device_t dev)
509{
510 struct sbsh_softc *sc = device_get_softc(dev);
511
512 sbsh_stop(sc);
513}
514
515static int
516sbsh_suspend(device_t dev)
517{
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518 struct sbsh_softc *sc = device_get_softc(dev);
519
520 crit_enter();
984263bc 521
984263bc 522 sbsh_stop(sc);
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523
524 crit_exit();
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525
526 return (0);
527}
528
529static int
530sbsh_resume(device_t dev)
531{
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532 struct sbsh_softc *sc = device_get_softc(dev);
533 struct ifnet *ifp = &sc->arpcom.ac_if;
984263bc 534
2622061f 535 crit_enter();
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536
537 if (ifp->if_flags & IFF_UP)
538 sbsh_init(sc);
539
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540 crit_exit();
541
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542 return (0);
543}
544
545
546static void
547sbsh_watchdog(struct ifnet *ifp)
548{
549 struct sbsh_softc *sc = ifp->if_softc;
550
551 if_printf(ifp, "transmit timeout\n");
552
553 if (sc->regs->SR & TXS) {
554 sc->regs->SR = TXS;
555 if_printf(ifp, "interrupt posted but not delivered\n");
556 }
557 free_sent_buffers(sc);
558}
559
560/* -------------------------------------------------------------------------- */
561
562static void
563sbsh_intr(void *arg)
564{
565 struct sbsh_softc *sc = (struct sbsh_softc *)arg;
566 u_int8_t status = sc->regs->SR;
567
568 if (status == 0)
569 return;
570
571 if (status & EXT) {
572 cx28975_interrupt(sc);
573 sc->regs->SR = EXT;
574 }
575
576 if (status & UFL) {
577 resume_tx(sc);
578 sc->regs->SR = UFL;
579 ++sc->in_stats.ufl_errs;
580 ++sc->arpcom.ac_if.if_oerrors;
581 }
582
583 if (status & RXS) {
584 sc->regs->SR = RXS;
585 indicate_frames(sc);
586 alloc_rx_buffers(sc);
587 }
588
589 if (status & TXS) {
590 sc->regs->SR = TXS;
591 free_sent_buffers(sc);
592 }
593
594 if (status & CRC) {
595 ++sc->in_stats.crc_errs;
596 ++sc->arpcom.ac_if.if_ierrors;
597 sc->regs->SR = CRC;
598 }
599
600 if (status & OFL) {
601 ++sc->in_stats.ofl_errs;
602 ++sc->arpcom.ac_if.if_ierrors;
603 sc->regs->SR = OFL;
604 }
605}
606
607/*
608 * Look for a first descriptor of a next packet, and write it's number
609 * into CTDR. Then enable the transmitter.
610 */
611static void
612resume_tx(struct sbsh_softc *sc)
613{
614 u_int32_t cur_tbd = sc->regs->CTDR;
615
616 while (cur_tbd != sc->regs->LTDR
617 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0)
618 ;
619 sc->regs->CTDR = cur_tbd;
620 sc->regs->CR |= TXEN;
621}
622
623static void
624start_xmit_frames(struct sbsh_softc *sc)
625{
626 struct ifnet *ifp = &sc->arpcom.ac_if;
627 struct mbuf *m;
628
629 /*
630 * Check if we have any free descriptor(s) and free space in
631 * our transmit queue.
632 */
633 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1))
634 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) {
635
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636 m = ifq_dequeue(&ifp->if_snd);
637 if (m == NULL)
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638 break;
639 if (m->m_pkthdr.len) {
7600679e 640 BPF_MTAP(ifp, m);
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641 encap_frame(sc, m);
642 } else
643 m_freem(m);
644 }
645
646 if (sc->regs->CTDR != sc->regs->LTDR)
647 ifp->if_flags |= IFF_OACTIVE;
648 else
649 ifp->if_flags &= ~IFF_OACTIVE;
650}
651
652
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653static void
654encap_frame(struct sbsh_softc *sc, struct mbuf *m_head)
655{
656 struct mbuf *m;
657 u_int32_t cur_tbd;
658 int done;
659
660look_for_nonzero:
661 for (m = m_head; !m->m_len; m = m->m_next)
662 ;
663
664 cur_tbd = sc->regs->LTDR & 0x7f;
665 done = 0;
666 do {
667 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) {
668 if ((m_head = repack(sc, m_head)) != NULL)
669 goto look_for_nonzero;
670 else
671 return;
672 }
673
674 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t));
675 sc->tbd[cur_tbd].length = m->m_len;
676
677 do {
678 m = m->m_next;
679 } while (m && !m->m_len);
680
681 if (!m) { /* last fragment has been reached */
682 sc->tbd[cur_tbd].length |= LAST_FRAG;
683 done = 1;
684 }
685
686 ++cur_tbd;
687 cur_tbd &= 0x7f;
688 } while (!done);
689
690 sc->xq[sc->tail_xq++] = m_head;
691 sc->tail_xq &= (XQLEN - 1);
692
693 sc->regs->LTDR = cur_tbd;
694 ++sc->in_stats.sent_pkts;
695 ++sc->arpcom.ac_if.if_opackets;
696}
697
698static struct mbuf *
699repack(struct sbsh_softc *sc, struct mbuf *m)
700{
701 struct mbuf *m_new;
702
74f1caca 703 MGETHDR(m_new, MB_DONTWAIT, MT_DATA);
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704 if (!m_new) {
705 if_printf (&sc->arpcom.ac_if,
706 "unable to get mbuf.\n");
707 return (NULL);
708 }
709
710 if (m->m_pkthdr.len > MHLEN) {
74f1caca 711 MCLGET(m_new, MB_DONTWAIT);
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712 if (!(m_new->m_flags & M_EXT)) {
713 m_freem(m_new);
714 if_printf (&sc->arpcom.ac_if,
715 "unable to get mbuf cluster.\n");
716 return (NULL);
717 }
718 }
719
720 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t));
721 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
722 m_freem(m);
723 return (m_new);
724}
725
726static void
727free_sent_buffers(struct sbsh_softc *sc)
728{
729 u_int32_t cur_tbd;
730
731 cur_tbd = sc->regs->CTDR;
732
733 while (sc->head_tdesc != cur_tbd) {
734 /*
735 * Be careful! one element in xq may correspond to
736 * multiple descriptors.
737 */
738 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) {
739 m_freem(sc->xq[sc->head_xq++]);
740 sc->head_xq &= (XQLEN - 1);
741 }
742
743 sc->tbd[sc->head_tdesc].length = 0;
744 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f;
745 }
746
747 start_xmit_frames(sc);
748}
749
750/*
751 * DON'T use free_sent_buffers to drop the queue!
752 */
753static void
754alloc_rx_buffers(struct sbsh_softc *sc)
755{
756 unsigned cur_rbd = sc->regs->LRDR & 0x7f;
757 struct mbuf *m;
758
759 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) {
74f1caca 760 MGETHDR(m, MB_DONTWAIT, MT_DATA);
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761 if (!m) {
762 if_printf (&sc->arpcom.ac_if,
763 "unable to get mbuf.\n");
764 return;
765 }
766
767 if (SBNI16_MAX_FRAME > MHLEN) {
74f1caca 768 MCLGET(m, MB_DONTWAIT);
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769 if (!(m->m_flags & M_EXT)) {
770 m_freem(m);
771 if_printf (&sc->arpcom.ac_if,
772 "unable to get mbuf cluster.\n");
773 return;
774 }
775 m->m_pkthdr.len = m->m_len = MCLBYTES;
776 }
777
778 m_adj(m, 2); /* align ip on longword boundaries */
779
780 sc->rq[sc->tail_rq++] = m;
781 sc->tail_rq &= (RQLEN - 1);
782
783 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t));
784 sc->rbd[cur_rbd].length = 0;
785 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f;
786 }
787}
788
789static void
790indicate_frames(struct sbsh_softc *sc)
791{
3013ac0e 792 struct ifnet *ifp = &sc->arpcom.ac_if;
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793 unsigned cur_rbd = sc->regs->CRDR & 0x7f;
794
795 while (sc->head_rdesc != cur_rbd) {
796 struct mbuf *m = sc->rq[sc->head_rq++];
797 sc->head_rq &= (RQLEN - 1);
798
799 m->m_pkthdr.len = m->m_len =
800 sc->rbd[sc->head_rdesc].length & 0x7ff;
3013ac0e 801 m->m_pkthdr.rcvif = ifp;
984263bc 802
3013ac0e 803 (*ifp->if_input)(ifp, m);
984263bc 804 ++sc->in_stats.rcvd_pkts;
3013ac0e 805 ++ifp->if_ipackets;
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806
807 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f;
808 }
809}
810
811static void
812drop_queues(struct sbsh_softc *sc)
813{
814 while (sc->head_rq != sc->tail_rq) {
815 m_freem(sc->rq[sc->head_rq++]);
816 sc->head_rq &= (RQLEN - 1);
817 }
818
819 while (sc->head_xq != sc->tail_xq) {
820 m_freem(sc->xq[sc->head_xq++]);
821 sc->head_xq &= (XQLEN - 1);
822 }
823}
824
825/* -------------------------------------------------------------------------- */
826
827static void
828activate(struct sbsh_softc *sc)
829{
830 struct timeval tv;
831
832 sc->regs->SR = 0xff; /* clear it! */
833 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0;
834
835 sc->head_tdesc = sc->head_rdesc = 0;
836 alloc_rx_buffers(sc);
837
838 sc->regs->CRB &= ~RXDE;
839 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL;
840 sc->regs->CR |= TXEN | RXEN;
841
842 sc->state = ACTIVE;
843 ++sc->in_stats.attempts;
844 microtime(&tv);
845 sc->in_stats.last_time = tv.tv_sec;
846 start_xmit_frames(sc);
847}
848
849static void
850deactivate(struct sbsh_softc *sc)
851{
852 sc->regs->CR &= ~(RXEN | TXEN);
853 sc->regs->CRB |= RXDE;
854 sc->regs->IMR = EXT;
855 sc->regs->CTDR = sc->regs->LTDR;
856 sc->regs->CRDR = sc->regs->LRDR;
857 sc->state = ACTIVATION;
858
859 drop_queues(sc);
860}
861
862/* -------------------------------------------------------------------------- */
863
864static void
865cx28975_interrupt(struct sbsh_softc *sc)
866{
867 volatile struct cx28975_cmdarea *p = sc->cmdp;
868 u_int8_t t;
869
870 if (p->intr_host != 0xfe)
871 return;
872
873 if (p->out_ack & 0x80) {
874 if (*((volatile u_int8_t *)p + 0x3c7) & 2) {
875 if (sc->state != ACTIVE
876 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) {
877 activate(sc);
878 if_printf(&sc->arpcom.ac_if, "connected to peer\n");
879 } else if (sc->state == ACTIVE
880 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) {
881 deactivate(sc);
882 if_printf(&sc->arpcom.ac_if, "carrier lost\n");
883 }
884 }
885
886 p->intr_host = 0;
887 t = p->intr_host;
888 p->out_ack = 0;
889 } else {
890 wakeup(sc);
891
892 p->intr_host = 0;
893 t = p->intr_host;
894 }
895}
896
897/* -------------------------------------------------------------------------- */
898
899static int
900start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg)
901{
902 static char thresh[] = { +8, -4, -16, -40 };
903
904 volatile struct cx28975_cmdarea *p = sc->cmdp;
905 u_int8_t t, parm[12];
906
907 p->intr_host = 0;
908 t = p->intr_host;
909
910 /* reset chip set */
911 sc->regs->IMR = EXT;
912 sc->regs->CR = 0;
913 sc->regs->SR = 0xff;
914 DELAY(2);
915 sc->regs->CR = XRST;
916 if (cfg.crc16)
917 sc->regs->CR |= CMOD;
918 if (cfg.fill_7e)
919 sc->regs->CR |= FMOD;
920 if (cfg.inv)
921 sc->regs->CR |= PMOD;
922
923 sc->regs->CRB |= RODD | RXDE;
924 if (cfg.rburst)
925 sc->regs->CRB |= RDBE;
926 if (cfg.wburst)
927 sc->regs->CRB |= WTBE;
928
377d4740 929 tsleep(sc, 0, "sbsh", 0);
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930 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP)
931 return (-1);
932
933 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len))
934 return (-1);
935
377d4740 936 tsleep(sc, 0, "sbsh", 0);
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937 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP)
938 return (-1);
939
940 t = cfg.master ? 1 : 9;
941 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1))
942 return (-1);
943
944 t = 0x63;
945 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1))
946 return (-1);
947
948 *(u_int16_t *)parm = cfg.lrate >> 3;
949 parm[2] = parm[3] = parm[0];
950 parm[5] = cfg.lrate & 7;
951 parm[4] = parm[7] = 1;
952 parm[6] = 0;
953 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8))
954 return (-1);
955
956 parm[0] = 0x02 | (cfg.mod << 4);
957 parm[1] = 0;
958 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2))
959 return (-1);
960
961 bzero(parm, 12);
962 parm[0] = 0x04; /* pre-activation: G.hs */
963 parm[4] = 0x04; /* no remote configuration */
964 parm[7] = 0x01; /* annex A (default) */
965 parm[8] = 0xff; /* i-bit mask (all bits) */
966 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12))
967 return (-1);
968
969 parm[0] = 0x03; /* dying gasp time - 3 frames */
970 parm[1] = thresh[cfg.mod];
971 parm[2] = 0xff; /* attenuation */
972 parm[3] = 0x04; /* line probe NMR (+2 dB) */
973 parm[4] = 0x00; /* reserved */
974 parm[5] = 0x00;
975 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6))
976 return (-1);
977
978 t = cfg.master ? 0x23 : 0x21;
979 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1))
980 return (-1);
981
982 t = 0x02;
983 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1))
984 return (-1);
985
986 sc->state = DOWN;
987 return (0);
988}
989
990static int
991download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len)
992{
993 u_int32_t t;
994 int i;
995 u_int8_t cksum = 0;
996
997 for (i = 0; i < img_len; ++i)
998 cksum += img[i];
999
1000 t = img_len;
1001 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4))
1002 return (-1);
1003
1004 for (i = 0; img_len >= 75; i += 75, img_len -= 75) {
1005 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75))
1006 return (-1);
1007 }
1008
1009 if (img_len
1010 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len))
1011 return (-1);
1012
1013 t = (cksum ^ 0xff) + 1;
1014 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1))
1015 return (-1);
1016
1017 return (0);
1018}
1019
1020static int
1021issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd,
1022 u_int8_t *data, u_int8_t size)
1023{
1024 volatile struct cx28975_cmdarea *p = sc->cmdp;
1025 u_int8_t *databuf = p->in_data;
1026 int i;
1027
1028 u_int8_t cksum = 0;
1029
1030 p->in_dest = 0xf0;
1031 p->in_opcode = cmd;
1032 p->in_zero = 0;
1033 p->in_length = --size;
1034 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa;
1035
1036 for (i = 0; i <= size; ++i) {
1037 cksum ^= *data;
1038 *databuf++ = *data++; /* only 1 byte per cycle! */
1039 }
1040
1041 p->in_datasum = cksum ^ 0xaa;
1042 p->out_ack = _ACK_NOT_COMPLETE;
1043 p->intr_8051 = 0xfe;
1044
377d4740 1045 if (tsleep(sc, 0, "sbsh", hz << 3))
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1046 return (-1);
1047
1048 while (p->out_ack == _ACK_NOT_COMPLETE)
1049 ; /* FIXME ! */
1050
1051 if ((p->out_ack & 0x1f) == _ACK_PASS) {
1052 p->out_ack = 0;
1053 return (0);
1054 } else {
1055 p->out_ack = 0;
1056 return (-1);
1057 }
1058}