2 * Copyright (c) 2006 M. Warner Losh. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * 1) Turn on the clock in pmc? Turn off?
29 * 2) GPIO initializtion in board setup code.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/module.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
45 #include <sys/sysctl.h>
46 #include <machine/bus.h>
48 #include <net/ethernet.h>
50 #include <net/if_arp.h>
51 #include <net/if_dl.h>
52 #include <net/if_media.h>
53 #include <net/if_mib.h>
54 #include <net/if_types.h>
57 #include <netinet/in.h>
58 #include <netinet/in_systm.h>
59 #include <netinet/in_var.h>
60 #include <netinet/ip.h>
64 #include <net/bpfdesc.h>
66 #include <dev/mii/mii.h>
67 #include <dev/mii/miivar.h>
68 #include <arm/at91/if_atereg.h>
70 #include "miibus_if.h"
72 #define ATE_MAX_TX_BUFFERS 2 /* We have ping-pong tx buffers */
73 #define ATE_MAX_RX_BUFFERS 64
76 * Driver-specific flags.
78 #define ATE_FLAG_DETACHING 0x01
79 #define ATE_FLAG_MULTICAST 0x02
83 struct ifnet *ifp; /* ifnet pointer */
84 struct mtx sc_mtx; /* Basically a perimeter lock */
85 device_t dev; /* Myself */
86 device_t miibus; /* My child miibus */
87 struct resource *irq_res; /* IRQ resource */
88 struct resource *mem_res; /* Memory resource */
89 struct callout tick_ch; /* Tick callout */
90 struct ifmib_iso_8802_3 mibdata; /* Stuff for network mgmt */
91 struct mbuf *sent_mbuf[ATE_MAX_TX_BUFFERS]; /* Sent mbufs */
92 bus_dma_tag_t mtag; /* bus dma tag for mbufs */
94 bus_dma_tag_t rx_desc_tag;
95 bus_dmamap_t rx_desc_map;
96 bus_dmamap_t rx_map[ATE_MAX_RX_BUFFERS];
97 bus_dmamap_t tx_map[ATE_MAX_TX_BUFFERS];
98 bus_addr_t rx_desc_phys;
99 eth_rx_desc_t *rx_descs;
100 void *rx_buf[ATE_MAX_RX_BUFFERS]; /* RX buffer space */
101 void *intrhand; /* Interrupt handle */
105 int txcur; /* Current TX map pointer */
109 static inline uint32_t
110 RD4(struct ate_softc *sc, bus_size_t off)
113 return (bus_read_4(sc->mem_res, off));
117 WR4(struct ate_softc *sc, bus_size_t off, uint32_t val)
120 bus_write_4(sc->mem_res, off, val);
124 BARRIER(struct ate_softc *sc, bus_size_t off, bus_size_t len, int flags)
127 bus_barrier(sc->mem_res, off, len, flags);
130 #define ATE_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
131 #define ATE_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
132 #define ATE_LOCK_INIT(_sc) \
133 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
134 MTX_NETWORK_LOCK, MTX_DEF)
135 #define ATE_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
136 #define ATE_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
137 #define ATE_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
139 static devclass_t ate_devclass;
142 * ifnet entry points.
144 static void ateinit_locked(void *);
145 static void atestart_locked(struct ifnet *);
147 static void ateinit(void *);
148 static void atestart(struct ifnet *);
149 static void atestop(struct ate_softc *);
150 static int ateioctl(struct ifnet * ifp, u_long, caddr_t);
155 static int ate_probe(device_t dev);
156 static int ate_attach(device_t dev);
157 static int ate_detach(device_t dev);
158 static void ate_intr(void *);
163 static int ate_activate(device_t dev);
164 static void ate_deactivate(struct ate_softc *sc);
165 static int ate_ifmedia_upd(struct ifnet *ifp);
166 static void ate_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
167 static int ate_get_mac(struct ate_softc *sc, u_char *eaddr);
168 static void ate_set_mac(struct ate_softc *sc, u_char *eaddr);
169 static void ate_rxfilter(struct ate_softc *sc);
172 * The AT91 family of products has the ethernet called EMAC. However,
173 * it isn't self identifying. It is anticipated that the parent bus
174 * code will take care to only add ate devices where they really are. As
175 * such, we do nothing here to identify the device and just set its name.
178 ate_probe(device_t dev)
181 device_set_desc(dev, "EMAC");
186 ate_attach(device_t dev)
188 struct ate_softc *sc;
189 struct ifnet *ifp = NULL;
190 struct sysctl_ctx_list *sctx;
191 struct sysctl_oid *soid;
192 u_char eaddr[ETHER_ADDR_LEN];
196 sc = device_get_softc(dev);
201 * Allocate resources.
204 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
206 if (sc->mem_res == NULL) {
207 device_printf(dev, "could not allocate memory resources.\n");
212 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
214 if (sc->irq_res == NULL) {
215 device_printf(dev, "could not allocate interrupt resources.\n");
220 err = ate_activate(dev);
224 sc->use_rmii = (RD4(sc, ETH_CFG) & ETH_CFG_RMII) == ETH_CFG_RMII;
227 sctx = device_get_sysctl_ctx(dev);
228 soid = device_get_sysctl_tree(dev);
229 SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "rmii",
230 CTLFLAG_RD, &sc->use_rmii, 0, "rmii in use");
232 /* Calling atestop before ifp is set is OK. */
236 callout_init_mtx(&sc->tick_ch, &sc->sc_mtx, 0);
238 if ((err = ate_get_mac(sc, eaddr)) != 0) {
240 * No MAC address configured. Generate the random one.
244 "Generating random ethernet address.\n");
248 * Set OUI to convenient locally assigned address. 'b'
249 * is 0x62, which has the locally assigned bit set, and
250 * the broadcast/multicast bit clear.
255 eaddr[3] = (rnd >> 16) & 0xff;
256 eaddr[4] = (rnd >> 8) & 0xff;
257 eaddr[5] = rnd & 0xff;
260 sc->ifp = ifp = if_alloc(IFT_ETHER);
261 if (mii_phy_probe(dev, &sc->miibus, ate_ifmedia_upd, ate_ifmedia_sts)) {
262 device_printf(dev, "Cannot find my PHY.\n");
268 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
269 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
270 ifp->if_capabilities |= IFCAP_VLAN_MTU;
271 ifp->if_capenable |= IFCAP_VLAN_MTU; /* The hw bits already set. */
272 ifp->if_start = atestart;
273 ifp->if_ioctl = ateioctl;
274 ifp->if_init = ateinit;
275 ifp->if_baudrate = 10000000;
276 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
277 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
278 IFQ_SET_READY(&ifp->if_snd);
280 ifp->if_linkmib = &sc->mibdata;
281 ifp->if_linkmiblen = sizeof(sc->mibdata);
282 sc->mibdata.dot3Compliance = DOT3COMPLIANCE_COLLS;
283 sc->if_flags = ifp->if_flags;
285 ether_ifattach(ifp, eaddr);
288 * Activate the interrupt.
290 err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
291 NULL, ate_intr, sc, &sc->intrhand);
293 device_printf(dev, "could not establish interrupt handler.\n");
305 ate_detach(device_t dev)
307 struct ate_softc *sc;
310 sc = device_get_softc(dev);
311 KASSERT(sc != NULL, ("[ate: %d]: sc is NULL", __LINE__));
313 if (device_is_attached(dev)) {
315 sc->flags |= ATE_FLAG_DETACHING;
318 callout_drain(&sc->tick_ch);
321 if (sc->miibus != NULL) {
322 device_delete_child(dev, sc->miibus);
325 bus_generic_detach(sc->dev);
327 if (sc->intrhand != NULL) {
328 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
335 if (sc->mem_res != NULL) {
336 bus_release_resource(dev, SYS_RES_IOPORT,
337 rman_get_rid(sc->mem_res), sc->mem_res);
340 if (sc->irq_res != NULL) {
341 bus_release_resource(dev, SYS_RES_IRQ,
342 rman_get_rid(sc->irq_res), sc->irq_res);
345 ATE_LOCK_DESTROY(sc);
350 ate_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
352 struct ate_softc *sc;
356 sc = (struct ate_softc *)arg;
357 sc->rx_desc_phys = segs[0].ds_addr;
361 ate_load_rx_buf(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
363 struct ate_softc *sc;
368 sc = (struct ate_softc *)arg;
372 * For the last buffer, set the wrap bit so the controller
373 * restarts from the first descriptor.
375 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map, BUS_DMASYNC_PREWRITE);
376 if (i == ATE_MAX_RX_BUFFERS - 1)
377 sc->rx_descs[i].addr = segs[0].ds_addr | ETH_WRAP_BIT;
379 sc->rx_descs[i].addr = segs[0].ds_addr;
380 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map, BUS_DMASYNC_POSTWRITE);
381 sc->rx_descs[i].status = 0;
382 /* Flush the memory in the mbuf */
383 bus_dmamap_sync(sc->rxtag, sc->rx_map[i], BUS_DMASYNC_PREREAD);
387 * Compute the multicast filter for this device using the standard
388 * algorithm. I wonder why this isn't in ether somewhere as a lot
389 * of different MAC chips use this method (or the reverse the bits)
393 ate_setmcast(struct ate_softc *sc)
397 u_char *af = (u_char *) mcaf;
398 struct ifmultiaddr *ifma;
403 if ((ifp->if_flags & IFF_PROMISC) != 0)
405 if ((ifp->if_flags & IFF_ALLMULTI) != 0) {
406 WR4(sc, ETH_HSL, 0xffffffff);
407 WR4(sc, ETH_HSH, 0xffffffff);
412 * Compute the multicast hash.
417 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
418 if (ifma->ifma_addr->sa_family != AF_LINK)
420 index = ether_crc32_be(LLADDR((struct sockaddr_dl *)
421 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
422 af[index >> 3] |= 1 << (index & 7);
424 if_maddr_runlock(ifp);
427 * Write the hash to the hash register. This card can also
428 * accept unicast packets as well as multicast packets using this
429 * register for easier bridging operations, but we don't take
430 * advantage of that. Locks here are to avoid LOR with the
431 * if_maddr_rlock, but might not be strictly necessary.
433 WR4(sc, ETH_HSL, mcaf[0]);
434 WR4(sc, ETH_HSH, mcaf[1]);
435 return (mcaf[0] || mcaf[1]);
439 ate_activate(device_t dev)
441 struct ate_softc *sc;
444 sc = device_get_softc(dev);
447 * Allocate DMA tags and maps.
449 err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
450 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
451 1, MCLBYTES, 0, busdma_lock_mutex, &sc->sc_mtx, &sc->mtag);
454 for (i = 0; i < ATE_MAX_TX_BUFFERS; i++) {
455 err = bus_dmamap_create(sc->mtag, 0, &sc->tx_map[i]);
461 * Allocate DMA tags and maps for RX.
463 err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
464 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
465 1, MCLBYTES, 0, busdma_lock_mutex, &sc->sc_mtx, &sc->rxtag);
470 * DMA tag and map for the RX descriptors.
472 err = bus_dma_tag_create(bus_get_dma_tag(dev), sizeof(eth_rx_desc_t),
473 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
474 ATE_MAX_RX_BUFFERS * sizeof(eth_rx_desc_t), 1,
475 ATE_MAX_RX_BUFFERS * sizeof(eth_rx_desc_t), 0, busdma_lock_mutex,
476 &sc->sc_mtx, &sc->rx_desc_tag);
479 if (bus_dmamem_alloc(sc->rx_desc_tag, (void **)&sc->rx_descs,
480 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &sc->rx_desc_map) != 0)
482 if (bus_dmamap_load(sc->rx_desc_tag, sc->rx_desc_map,
483 sc->rx_descs, ATE_MAX_RX_BUFFERS * sizeof(eth_rx_desc_t),
484 ate_getaddr, sc, 0) != 0)
488 * Allocate our RX buffers. This chip has a RX structure that's filled
491 for (i = 0; i < ATE_MAX_RX_BUFFERS; i++) {
493 if (bus_dmamem_alloc(sc->rxtag, (void **)&sc->rx_buf[i],
494 BUS_DMA_NOWAIT, &sc->rx_map[i]) != 0)
496 if (bus_dmamap_load(sc->rxtag, sc->rx_map[i], sc->rx_buf[i],
497 MCLBYTES, ate_load_rx_buf, sc, 0) != 0)
501 /* Flush the memory for the EMAC rx descriptor. */
502 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map, BUS_DMASYNC_PREWRITE);
503 /* Write the descriptor queue address. */
504 WR4(sc, ETH_RBQP, sc->rx_desc_phys);
512 ate_deactivate(struct ate_softc *sc)
516 KASSERT(sc != NULL, ("[ate, %d]: sc is NULL!", __LINE__));
517 if (sc->mtag != NULL) {
518 for (i = 0; i < ATE_MAX_TX_BUFFERS; i++) {
519 if (sc->sent_mbuf[i] != NULL) {
520 bus_dmamap_sync(sc->mtag, sc->tx_map[i],
521 BUS_DMASYNC_POSTWRITE);
522 bus_dmamap_unload(sc->mtag, sc->tx_map[i]);
523 m_freem(sc->sent_mbuf[i]);
525 bus_dmamap_destroy(sc->mtag, sc->tx_map[i]);
526 sc->sent_mbuf[i] = NULL;
527 sc->tx_map[i] = NULL;
529 bus_dma_tag_destroy(sc->mtag);
531 if (sc->rx_desc_tag != NULL) {
532 if (sc->rx_descs != NULL) {
533 if (sc->rx_desc_phys != 0) {
534 bus_dmamap_sync(sc->rx_desc_tag,
535 sc->rx_desc_map, BUS_DMASYNC_POSTREAD);
536 bus_dmamap_unload(sc->rx_desc_tag,
538 sc->rx_desc_phys = 0;
542 if (sc->rxtag != NULL) {
543 for (i = 0; i < ATE_MAX_RX_BUFFERS; i++) {
544 if (sc->rx_buf[i] != NULL) {
545 if (sc->rx_descs[i].addr != 0) {
546 bus_dmamap_sync(sc->rxtag,
548 BUS_DMASYNC_POSTREAD);
549 bus_dmamap_unload(sc->rxtag,
551 sc->rx_descs[i].addr = 0;
553 bus_dmamem_free(sc->rxtag, sc->rx_buf[i],
555 sc->rx_buf[i] = NULL;
556 sc->rx_map[i] = NULL;
559 bus_dma_tag_destroy(sc->rxtag);
561 if (sc->rx_desc_tag != NULL) {
562 if (sc->rx_descs != NULL)
563 bus_dmamem_free(sc->rx_desc_tag, sc->rx_descs,
565 bus_dma_tag_destroy(sc->rx_desc_tag);
567 sc->rx_desc_tag = NULL;
572 * Change media according to request.
575 ate_ifmedia_upd(struct ifnet *ifp)
577 struct ate_softc *sc = ifp->if_softc;
578 struct mii_data *mii;
580 mii = device_get_softc(sc->miibus);
588 * Notify the world which media we're using.
591 ate_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
593 struct ate_softc *sc = ifp->if_softc;
594 struct mii_data *mii;
596 mii = device_get_softc(sc->miibus);
599 ifmr->ifm_active = mii->mii_media_active;
600 ifmr->ifm_status = mii->mii_media_status;
605 ate_stat_update(struct ate_softc *sc, int active)
610 * The speed and full/half-duplex state needs to be reflected
611 * in the ETH_CFG register.
613 reg = RD4(sc, ETH_CFG);
614 reg &= ~(ETH_CFG_SPD | ETH_CFG_FD);
615 if (IFM_SUBTYPE(active) != IFM_10_T)
617 if (active & IFM_FDX)
619 WR4(sc, ETH_CFG, reg);
625 struct ate_softc *sc = xsc;
626 struct ifnet *ifp = sc->ifp;
627 struct mii_data *mii;
632 * The KB920x boot loader tests ETH_SR & ETH_SR_LINK and will ask
633 * the MII if there's a link if this bit is clear. Not sure if we
634 * should do the same thing here or not.
636 ATE_ASSERT_LOCKED(sc);
637 if (sc->miibus != NULL) {
638 mii = device_get_softc(sc->miibus);
639 active = mii->mii_media_active;
641 if (mii->mii_media_status & IFM_ACTIVE &&
642 active != mii->mii_media_active)
643 ate_stat_update(sc, mii->mii_media_active);
647 * Update the stats as best we can. When we're done, clear
648 * the status counters and start over. We're supposed to read these
649 * registers often enough that they won't overflow. Hopefully
650 * once a second is often enough. Some don't map well to
651 * the dot3Stats mib, so for those we just count them as general
652 * errors. Stats for iframes, ibutes, oframes and obytes are
653 * collected elsewhere. These registers zero on a read to prevent
654 * races. For all the collision stats, also update the collision
655 * stats for the interface.
657 sc->mibdata.dot3StatsAlignmentErrors += RD4(sc, ETH_ALE);
658 sc->mibdata.dot3StatsFCSErrors += RD4(sc, ETH_SEQE);
659 c = RD4(sc, ETH_SCOL);
660 ifp->if_collisions += c;
661 sc->mibdata.dot3StatsSingleCollisionFrames += c;
662 c = RD4(sc, ETH_MCOL);
663 sc->mibdata.dot3StatsMultipleCollisionFrames += c;
664 ifp->if_collisions += c;
665 sc->mibdata.dot3StatsSQETestErrors += RD4(sc, ETH_SQEE);
666 sc->mibdata.dot3StatsDeferredTransmissions += RD4(sc, ETH_DTE);
667 c = RD4(sc, ETH_LCOL);
668 sc->mibdata.dot3StatsLateCollisions += c;
669 ifp->if_collisions += c;
670 c = RD4(sc, ETH_ECOL);
671 sc->mibdata.dot3StatsExcessiveCollisions += c;
672 ifp->if_collisions += c;
673 sc->mibdata.dot3StatsCarrierSenseErrors += RD4(sc, ETH_CSE);
674 sc->mibdata.dot3StatsFrameTooLongs += RD4(sc, ETH_ELR);
675 sc->mibdata.dot3StatsInternalMacReceiveErrors += RD4(sc, ETH_DRFC);
678 * Not sure where to lump these, so count them against the errors
681 sc->ifp->if_oerrors += RD4(sc, ETH_TUE);
682 sc->ifp->if_ierrors += RD4(sc, ETH_CDE) + RD4(sc, ETH_RJB) +
686 * Schedule another timeout one second from now.
688 callout_reset(&sc->tick_ch, hz, ate_tick, sc);
692 ate_set_mac(struct ate_softc *sc, u_char *eaddr)
695 WR4(sc, ETH_SA1L, (eaddr[3] << 24) | (eaddr[2] << 16) |
696 (eaddr[1] << 8) | eaddr[0]);
697 WR4(sc, ETH_SA1H, (eaddr[5] << 8) | (eaddr[4]));
701 ate_get_mac(struct ate_softc *sc, u_char *eaddr)
703 bus_size_t sa_low_reg[] = { ETH_SA1L, ETH_SA2L, ETH_SA3L, ETH_SA4L };
704 bus_size_t sa_high_reg[] = { ETH_SA1H, ETH_SA2H, ETH_SA3H, ETH_SA4H };
709 * The boot loader setup the MAC with an address, if one is set in
710 * the loader. Grab one MAC address from the SA[1-4][HL] registers.
712 for (i = 0; i < 4; i++) {
713 low = RD4(sc, sa_low_reg[i]);
714 high = RD4(sc, sa_high_reg[i]);
715 if ((low | (high & 0xffff)) != 0) {
716 eaddr[0] = low & 0xff;
717 eaddr[1] = (low >> 8) & 0xff;
718 eaddr[2] = (low >> 16) & 0xff;
719 eaddr[3] = (low >> 24) & 0xff;
720 eaddr[4] = high & 0xff;
721 eaddr[5] = (high >> 8) & 0xff;
731 struct ate_softc *sc = xsc;
732 struct ifnet *ifp = sc->ifp;
735 uint32_t status, reg, rx_stat;
738 status = RD4(sc, ETH_ISR);
741 if (status & ETH_ISR_RCOM) {
742 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map,
743 BUS_DMASYNC_POSTREAD);
744 while (sc->rx_descs[sc->rx_buf_ptr].addr & ETH_CPU_OWNER) {
746 sc->rx_buf_ptr = (i + 1) % ATE_MAX_RX_BUFFERS;
748 rx_stat = sc->rx_descs[i].status;
749 if ((rx_stat & ETH_LEN_MASK) == 0) {
751 device_printf(sc->dev, "ignoring bogus zero-length packet\n");
752 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map,
753 BUS_DMASYNC_PREWRITE);
754 sc->rx_descs[i].addr &= ~ETH_CPU_OWNER;
755 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map,
756 BUS_DMASYNC_POSTWRITE);
759 /* Flush memory for mbuf so we don't get stale bytes */
760 bus_dmamap_sync(sc->rxtag, sc->rx_map[i],
761 BUS_DMASYNC_POSTREAD);
762 WR4(sc, ETH_RSR, RD4(sc, ETH_RSR));
765 * The length returned by the device includes the
766 * ethernet CRC calculation for the packet, but
767 * ifnet drivers are supposed to discard it.
769 mb = m_devget(sc->rx_buf[i],
770 (rx_stat & ETH_LEN_MASK) - ETHER_CRC_LEN,
771 ETHER_ALIGN, ifp, NULL);
772 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map,
773 BUS_DMASYNC_PREWRITE);
774 sc->rx_descs[i].addr &= ~ETH_CPU_OWNER;
775 bus_dmamap_sync(sc->rx_desc_tag, sc->rx_desc_map,
776 BUS_DMASYNC_POSTWRITE);
777 bus_dmamap_sync(sc->rxtag, sc->rx_map[i],
778 BUS_DMASYNC_PREREAD);
781 (*ifp->if_input)(ifp, mb);
786 if (status & ETH_ISR_TCOM) {
788 /* XXX TSR register should be cleared */
789 if (sc->sent_mbuf[0]) {
790 bus_dmamap_sync(sc->mtag, sc->tx_map[0],
791 BUS_DMASYNC_POSTWRITE);
792 bus_dmamap_unload(sc->mtag, sc->tx_map[0]);
793 m_freem(sc->sent_mbuf[0]);
795 sc->sent_mbuf[0] = NULL;
797 if (sc->sent_mbuf[1]) {
798 if (RD4(sc, ETH_TSR) & ETH_TSR_IDLE) {
799 bus_dmamap_sync(sc->mtag, sc->tx_map[1],
800 BUS_DMASYNC_POSTWRITE);
801 bus_dmamap_unload(sc->mtag, sc->tx_map[1]);
802 m_freem(sc->sent_mbuf[1]);
805 sc->sent_mbuf[0] = sc->sent_mbuf[1] = NULL;
807 sc->sent_mbuf[0] = sc->sent_mbuf[1];
808 sc->sent_mbuf[1] = NULL;
812 sc->sent_mbuf[0] = NULL;
816 * We're no longer busy, so clear the busy flag and call the
817 * start routine to xmit more packets.
819 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
820 atestart_locked(sc->ifp);
823 if (status & ETH_ISR_RBNA) {
824 /* Workaround Errata #11 */
826 device_printf(sc->dev, "RBNA workaround\n");
827 reg = RD4(sc, ETH_CTL);
828 WR4(sc, ETH_CTL, reg & ~ETH_CTL_RE);
829 BARRIER(sc, ETH_CTL, 4, BUS_SPACE_BARRIER_WRITE);
830 WR4(sc, ETH_CTL, reg | ETH_CTL_RE);
835 * Reset and initialize the chip.
838 ateinit_locked(void *xsc)
840 struct ate_softc *sc = xsc;
841 struct ifnet *ifp = sc->ifp;
842 struct mii_data *mii;
843 uint8_t eaddr[ETHER_ADDR_LEN];
846 ATE_ASSERT_LOCKED(sc);
850 * we need to turn on the EMAC clock in the pmc. With the
851 * default boot loader, this is already turned on. However, we
852 * need to think about how best to turn it on/off as the interface
853 * is brought up/down, as well as dealing with the mii bus...
855 * We also need to multiplex the pins correctly.
859 * There are two different ways that the mii bus is connected
860 * to this chip. Select the right one based on a compile-time
863 reg = RD4(sc, ETH_CFG);
867 reg &= ~ETH_CFG_RMII;
868 WR4(sc, ETH_CFG, reg);
873 * Set the chip MAC address.
875 bcopy(IF_LLADDR(ifp), eaddr, ETHER_ADDR_LEN);
876 ate_set_mac(sc, eaddr);
879 * Turn on MACs and interrupt processing.
881 WR4(sc, ETH_CTL, RD4(sc, ETH_CTL) | ETH_CTL_TE | ETH_CTL_RE);
882 WR4(sc, ETH_IER, ETH_ISR_RCOM | ETH_ISR_TCOM | ETH_ISR_RBNA);
884 /* Enable big packets. */
885 WR4(sc, ETH_CFG, RD4(sc, ETH_CFG) | ETH_CFG_BIG);
888 * Set 'running' flag, and clear output active flag
889 * and attempt to start the output.
891 ifp->if_drv_flags |= IFF_DRV_RUNNING;
892 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
894 mii = device_get_softc(sc->miibus);
896 ate_stat_update(sc, mii->mii_media_active);
897 atestart_locked(ifp);
899 callout_reset(&sc->tick_ch, hz, ate_tick, sc);
903 * Dequeue packets and transmit.
906 atestart_locked(struct ifnet *ifp)
908 struct ate_softc *sc = ifp->if_softc;
909 struct mbuf *m, *mdefrag;
910 bus_dma_segment_t segs[1];
913 ATE_ASSERT_LOCKED(sc);
914 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
917 while (sc->txcur < ATE_MAX_TX_BUFFERS) {
919 * Check to see if there's room to put another packet into the
920 * xmit queue. The EMAC chip has a ping-pong buffer for xmit
921 * packets. We use OACTIVE to indicate "we can stuff more into
922 * our buffers (clear) or not (set)."
924 if (!(RD4(sc, ETH_TSR) & ETH_TSR_BNQ)) {
925 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
928 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
930 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
933 e = bus_dmamap_load_mbuf_sg(sc->mtag, sc->tx_map[sc->txcur], m,
936 mdefrag = m_defrag(m, M_DONTWAIT);
937 if (mdefrag == NULL) {
938 IFQ_DRV_PREPEND(&ifp->if_snd, m);
942 e = bus_dmamap_load_mbuf_sg(sc->mtag,
943 sc->tx_map[sc->txcur], m, segs, &nseg, 0);
949 bus_dmamap_sync(sc->mtag, sc->tx_map[sc->txcur],
950 BUS_DMASYNC_PREWRITE);
953 * Tell the hardware to xmit the packet.
955 WR4(sc, ETH_TAR, segs[0].ds_addr);
956 BARRIER(sc, ETH_TAR, 8, BUS_SPACE_BARRIER_WRITE);
957 WR4(sc, ETH_TCR, segs[0].ds_len);
960 * Tap off here if there is a bpf listener.
964 sc->sent_mbuf[sc->txcur] = m;
972 struct ate_softc *sc = xsc;
980 atestart(struct ifnet *ifp)
982 struct ate_softc *sc = ifp->if_softc;
985 atestart_locked(ifp);
990 * Turn off interrupts, and stop the NIC. Can be called with sc->ifp NULL,
994 atestop(struct ate_softc *sc)
999 ATE_ASSERT_LOCKED(sc);
1003 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
1006 callout_stop(&sc->tick_ch);
1009 * Enable some parts of the MAC that are needed always (like the
1010 * MII bus. This turns off the RE and TE bits, which will remain
1011 * off until ateinit() is called to turn them on. With RE and TE
1012 * turned off, there's no DMA to worry about after this write.
1014 WR4(sc, ETH_CTL, ETH_CTL_MPE);
1017 * Turn off all the configured options and revert to defaults.
1019 WR4(sc, ETH_CFG, ETH_CFG_CLK_32);
1022 * Turn off all the interrupts, and ack any pending ones by reading
1025 WR4(sc, ETH_IDR, 0xffffffff);
1029 * Clear out the Transmit and Receiver Status registers of any
1030 * errors they may be reporting
1032 WR4(sc, ETH_TSR, 0xffffffff);
1033 WR4(sc, ETH_RSR, 0xffffffff);
1036 * Release TX resources.
1038 for (i = 0; i < ATE_MAX_TX_BUFFERS; i++) {
1039 if (sc->sent_mbuf[i] != NULL) {
1040 bus_dmamap_sync(sc->mtag, sc->tx_map[i],
1041 BUS_DMASYNC_POSTWRITE);
1042 bus_dmamap_unload(sc->mtag, sc->tx_map[i]);
1043 m_freem(sc->sent_mbuf[i]);
1044 sc->sent_mbuf[i] = NULL;
1049 * XXX we should power down the EMAC if it isn't in use, after
1050 * putting it into loopback mode. This saves about 400uA according
1056 ate_rxfilter(struct ate_softc *sc)
1062 KASSERT(sc != NULL, ("[ate, %d]: sc is NULL!", __LINE__));
1063 ATE_ASSERT_LOCKED(sc);
1067 * Wipe out old filter settings.
1069 reg = RD4(sc, ETH_CFG);
1070 reg &= ~(ETH_CFG_CAF | ETH_CFG_MTI | ETH_CFG_UNI);
1072 sc->flags &= ~ATE_FLAG_MULTICAST;
1075 * Set new parameters.
1077 if ((ifp->if_flags & IFF_BROADCAST) != 0)
1078 reg &= ~ETH_CFG_NBC;
1079 if ((ifp->if_flags & IFF_PROMISC) != 0) {
1082 enabled = ate_setmcast(sc);
1085 sc->flags |= ATE_FLAG_MULTICAST;
1088 WR4(sc, ETH_CFG, reg);
1092 ateioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1094 struct ate_softc *sc = ifp->if_softc;
1095 struct mii_data *mii;
1096 struct ifreq *ifr = (struct ifreq *)data;
1097 int drv_flags, flags;
1098 int mask, error, enabled;
1101 flags = ifp->if_flags;
1102 drv_flags = ifp->if_drv_flags;
1106 if ((flags & IFF_UP) != 0) {
1107 if ((drv_flags & IFF_DRV_RUNNING) != 0) {
1108 if (((flags ^ sc->if_flags)
1109 & (IFF_PROMISC | IFF_ALLMULTI)) != 0)
1112 if ((sc->flags & ATE_FLAG_DETACHING) == 0)
1115 } else if ((drv_flags & IFF_DRV_RUNNING) != 0) {
1116 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1119 sc->if_flags = flags;
1125 if ((drv_flags & IFF_DRV_RUNNING) != 0) {
1127 enabled = ate_setmcast(sc);
1128 if (enabled != (sc->flags & ATE_FLAG_MULTICAST))
1136 mii = device_get_softc(sc->miibus);
1137 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
1140 mask = ifp->if_capenable ^ ifr->ifr_reqcap;
1141 if (mask & IFCAP_VLAN_MTU) {
1143 if (ifr->ifr_reqcap & IFCAP_VLAN_MTU) {
1144 WR4(sc, ETH_CFG, RD4(sc, ETH_CFG) | ETH_CFG_BIG);
1145 ifp->if_capenable |= IFCAP_VLAN_MTU;
1147 WR4(sc, ETH_CFG, RD4(sc, ETH_CFG) & ~ETH_CFG_BIG);
1148 ifp->if_capenable &= ~IFCAP_VLAN_MTU;
1153 error = ether_ioctl(ifp, cmd, data);
1160 ate_child_detached(device_t dev, device_t child)
1162 struct ate_softc *sc;
1164 sc = device_get_softc(dev);
1165 if (child == sc->miibus)
1170 * MII bus support routines.
1173 ate_miibus_readreg(device_t dev, int phy, int reg)
1175 struct ate_softc *sc;
1179 * XXX if we implement agressive power savings, then we need
1180 * XXX to make sure that the clock to the emac is on here
1183 sc = device_get_softc(dev);
1184 DELAY(1); /* Hangs w/o this delay really 30.5us atm */
1185 WR4(sc, ETH_MAN, ETH_MAN_REG_RD(phy, reg));
1186 while ((RD4(sc, ETH_SR) & ETH_SR_IDLE) == 0)
1188 val = RD4(sc, ETH_MAN) & ETH_MAN_VALUE_MASK;
1194 ate_miibus_writereg(device_t dev, int phy, int reg, int data)
1196 struct ate_softc *sc;
1199 * XXX if we implement agressive power savings, then we need
1200 * XXX to make sure that the clock to the emac is on here
1203 sc = device_get_softc(dev);
1204 WR4(sc, ETH_MAN, ETH_MAN_REG_WR(phy, reg, data));
1205 while ((RD4(sc, ETH_SR) & ETH_SR_IDLE) == 0)
1210 static device_method_t ate_methods[] = {
1211 /* Device interface */
1212 DEVMETHOD(device_probe, ate_probe),
1213 DEVMETHOD(device_attach, ate_attach),
1214 DEVMETHOD(device_detach, ate_detach),
1217 DEVMETHOD(bus_child_detached, ate_child_detached),
1220 DEVMETHOD(miibus_readreg, ate_miibus_readreg),
1221 DEVMETHOD(miibus_writereg, ate_miibus_writereg),
1226 static driver_t ate_driver = {
1229 sizeof(struct ate_softc),
1232 DRIVER_MODULE(ate, atmelarm, ate_driver, ate_devclass, 0, 0);
1233 DRIVER_MODULE(miibus, ate, miibus_driver, miibus_devclass, 0, 0);
1234 MODULE_DEPEND(ate, miibus, 1, 1, 1);
1235 MODULE_DEPEND(ate, ether, 1, 1, 1);