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if_tl.c revision 1.68
      1 /*	$NetBSD: if_tl.c,v 1.68 2005/02/04 02:10:45 perry Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *  This product includes software developed by Manuel Bouyer.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Texas Instruments ThunderLAN ethernet controller
     34  * ThunderLAN Programmer's Guide (TI Literature Number SPWU013A)
     35  * available from www.ti.com
     36  */
     37 
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: if_tl.c,v 1.68 2005/02/04 02:10:45 perry Exp $");
     40 
     41 #undef TLDEBUG
     42 #define TL_PRIV_STATS
     43 #undef TLDEBUG_RX
     44 #undef TLDEBUG_TX
     45 #undef TLDEBUG_ADDR
     46 
     47 #include "opt_inet.h"
     48 #include "opt_ns.h"
     49 
     50 #include <sys/param.h>
     51 #include <sys/systm.h>
     52 #include <sys/mbuf.h>
     53 #include <sys/protosw.h>
     54 #include <sys/socket.h>
     55 #include <sys/ioctl.h>
     56 #include <sys/errno.h>
     57 #include <sys/malloc.h>
     58 #include <sys/kernel.h>
     59 #include <sys/proc.h>	/* only for declaration of wakeup() used by vm.h */
     60 #include <sys/device.h>
     61 
     62 #include <net/if.h>
     63 #if defined(SIOCSIFMEDIA)
     64 #include <net/if_media.h>
     65 #endif
     66 #include <net/if_types.h>
     67 #include <net/if_dl.h>
     68 #include <net/route.h>
     69 #include <net/netisr.h>
     70 
     71 #include "bpfilter.h"
     72 #if NBPFILTER > 0
     73 #include <net/bpf.h>
     74 #include <net/bpfdesc.h>
     75 #endif
     76 
     77 #include "rnd.h"
     78 #if NRND > 0
     79 #include <sys/rnd.h>
     80 #endif
     81 
     82 #ifdef INET
     83 #include <netinet/in.h>
     84 #include <netinet/in_systm.h>
     85 #include <netinet/in_var.h>
     86 #include <netinet/ip.h>
     87 #endif
     88 
     89 #ifdef NS
     90 #include <netns/ns.h>
     91 #include <netns/ns_if.h>
     92 #endif
     93 
     94 #if defined(__NetBSD__)
     95 #include <net/if_ether.h>
     96 #include <uvm/uvm_extern.h>
     97 #if defined(INET)
     98 #include <netinet/if_inarp.h>
     99 #endif
    100 
    101 #include <machine/bus.h>
    102 #include <machine/intr.h>
    103 
    104 #include <dev/pci/pcireg.h>
    105 #include <dev/pci/pcivar.h>
    106 #include <dev/pci/pcidevs.h>
    107 
    108 #include <dev/i2c/i2cvar.h>
    109 #include <dev/i2c/i2c_bitbang.h>
    110 #include <dev/i2c/at24cxxvar.h>
    111 
    112 #include <dev/mii/mii.h>
    113 #include <dev/mii/miivar.h>
    114 
    115 #include <dev/mii/tlphyvar.h>
    116 
    117 #include <dev/pci/if_tlregs.h>
    118 #include <dev/pci/if_tlvar.h>
    119 #endif /* __NetBSD__ */
    120 
    121 /* number of transmit/receive buffers */
    122 #ifndef TL_NBUF
    123 #define TL_NBUF 32
    124 #endif
    125 
    126 static int tl_pci_match(struct device *, struct cfdata *, void *);
    127 static void tl_pci_attach(struct device *, struct device *, void *);
    128 static int tl_intr(void *);
    129 
    130 static int tl_ifioctl(struct ifnet *, ioctl_cmd_t, caddr_t);
    131 static int tl_mediachange(struct ifnet *);
    132 static void tl_mediastatus(struct ifnet *, struct ifmediareq *);
    133 static void tl_ifwatchdog(struct ifnet *);
    134 static void tl_shutdown(void*);
    135 
    136 static void tl_ifstart(struct ifnet *);
    137 static void tl_reset(tl_softc_t*);
    138 static int  tl_init(struct ifnet *);
    139 static void tl_stop(struct ifnet *, int);
    140 static void tl_restart(void  *);
    141 static int  tl_add_RxBuff(tl_softc_t*, struct Rx_list*, struct mbuf*);
    142 static void tl_read_stats(tl_softc_t*);
    143 static void tl_ticks(void*);
    144 static int tl_multicast_hash(u_int8_t*);
    145 static void tl_addr_filter(tl_softc_t*);
    146 
    147 static u_int32_t tl_intreg_read(tl_softc_t*, u_int32_t);
    148 static void tl_intreg_write(tl_softc_t*, u_int32_t, u_int32_t);
    149 static u_int8_t tl_intreg_read_byte(tl_softc_t*, u_int32_t);
    150 static void tl_intreg_write_byte(tl_softc_t*, u_int32_t, u_int8_t);
    151 
    152 void	tl_mii_sync(struct tl_softc *);
    153 void	tl_mii_sendbits(struct tl_softc *, u_int32_t, int);
    154 
    155 
    156 #if defined(TLDEBUG_RX)
    157 static void ether_printheader(struct ether_header*);
    158 #endif
    159 
    160 int tl_mii_read(struct device *, int, int);
    161 void tl_mii_write(struct device *, int, int, int);
    162 
    163 void tl_statchg(struct device *);
    164 
    165 	/* I2C glue */
    166 static int tl_i2c_acquire_bus(void *, int);
    167 static void tl_i2c_release_bus(void *, int);
    168 static int tl_i2c_send_start(void *, int);
    169 static int tl_i2c_send_stop(void *, int);
    170 static int tl_i2c_initiate_xfer(void *, i2c_addr_t, int);
    171 static int tl_i2c_read_byte(void *, uint8_t *, int);
    172 static int tl_i2c_write_byte(void *, uint8_t, int);
    173 
    174 	/* I2C bit-bang glue */
    175 static void tl_i2cbb_set_bits(void *, uint32_t);
    176 static void tl_i2cbb_set_dir(void *, uint32_t);
    177 static uint32_t tl_i2cbb_read(void *);
    178 static const struct i2c_bitbang_ops tl_i2cbb_ops = {
    179 	tl_i2cbb_set_bits,
    180 	tl_i2cbb_set_dir,
    181 	tl_i2cbb_read,
    182 	{
    183 		TL_NETSIO_EDATA,	/* SDA */
    184 		TL_NETSIO_ECLOCK,	/* SCL */
    185 		TL_NETSIO_ETXEN,	/* SDA is output */
    186 		0,			/* SDA is input */
    187 	}
    188 };
    189 
    190 static __inline void netsio_clr(tl_softc_t*, u_int8_t);
    191 static __inline void netsio_set(tl_softc_t*, u_int8_t);
    192 static __inline u_int8_t netsio_read(tl_softc_t*, u_int8_t);
    193 static __inline void netsio_clr(sc, bits)
    194 	tl_softc_t* sc;
    195 	u_int8_t bits;
    196 {
    197 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetSio,
    198 	    tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetSio) & (~bits));
    199 }
    200 static __inline void netsio_set(sc, bits)
    201 	tl_softc_t* sc;
    202 	u_int8_t bits;
    203 {
    204 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetSio,
    205 	    tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetSio) | bits);
    206 }
    207 static __inline u_int8_t netsio_read(sc, bits)
    208 	tl_softc_t* sc;
    209 	u_int8_t bits;
    210 {
    211 	return (tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetSio) & bits);
    212 }
    213 
    214 CFATTACH_DECL(tl, sizeof(tl_softc_t),
    215     tl_pci_match, tl_pci_attach, NULL, NULL);
    216 
    217 const struct tl_product_desc tl_compaq_products[] = {
    218 	{ PCI_PRODUCT_COMPAQ_N100TX, TLPHY_MEDIA_NO_10_T,
    219 	  "Compaq Netelligent 10/100 TX" },
    220 	{ PCI_PRODUCT_COMPAQ_INT100TX, TLPHY_MEDIA_NO_10_T,
    221 	  "Integrated Compaq Netelligent 10/100 TX" },
    222 	{ PCI_PRODUCT_COMPAQ_N10T, TLPHY_MEDIA_10_5,
    223 	  "Compaq Netelligent 10 T" },
    224 	{ PCI_PRODUCT_COMPAQ_IntNF3P, TLPHY_MEDIA_10_2,
    225 	  "Compaq Integrated NetFlex 3/P" },
    226 	{ PCI_PRODUCT_COMPAQ_IntPL100TX, TLPHY_MEDIA_10_2|TLPHY_MEDIA_NO_10_T,
    227 	  "Compaq ProLiant Integrated Netelligent 10/100 TX" },
    228 	{ PCI_PRODUCT_COMPAQ_DPNet100TX, TLPHY_MEDIA_10_5|TLPHY_MEDIA_NO_10_T,
    229 	  "Compaq Dual Port Netelligent 10/100 TX" },
    230 	{ PCI_PRODUCT_COMPAQ_DP4000, TLPHY_MEDIA_10_5|TLPHY_MEDIA_NO_10_T,
    231 	  "Compaq Deskpro 4000 5233MMX" },
    232 	{ PCI_PRODUCT_COMPAQ_NF3P_BNC, TLPHY_MEDIA_10_2,
    233 	  "Compaq NetFlex 3/P w/ BNC" },
    234 	{ PCI_PRODUCT_COMPAQ_NF3P, TLPHY_MEDIA_10_5,
    235 	  "Compaq NetFlex 3/P" },
    236 	{ 0, 0, NULL },
    237 };
    238 
    239 const struct tl_product_desc tl_ti_products[] = {
    240 	/*
    241 	 * Built-in Ethernet on the TI TravelMate 5000
    242 	 * docking station; better product description?
    243 	 */
    244 	{ PCI_PRODUCT_TI_TLAN, 0,
    245 	  "Texas Instruments ThunderLAN" },
    246 	{ 0, 0, NULL },
    247 };
    248 
    249 struct tl_vendor_desc {
    250 	u_int32_t tv_vendor;
    251 	const struct tl_product_desc *tv_products;
    252 };
    253 
    254 const struct tl_vendor_desc tl_vendors[] = {
    255 	{ PCI_VENDOR_COMPAQ, tl_compaq_products },
    256 	{ PCI_VENDOR_TI, tl_ti_products },
    257 	{ 0, NULL },
    258 };
    259 
    260 const struct tl_product_desc *tl_lookup_product(u_int32_t);
    261 
    262 const struct tl_product_desc *
    263 tl_lookup_product(id)
    264 	u_int32_t id;
    265 {
    266 	const struct tl_product_desc *tp;
    267 	const struct tl_vendor_desc *tv;
    268 
    269 	for (tv = tl_vendors; tv->tv_products != NULL; tv++)
    270 		if (PCI_VENDOR(id) == tv->tv_vendor)
    271 			break;
    272 
    273 	if ((tp = tv->tv_products) == NULL)
    274 		return (NULL);
    275 
    276 	for (; tp->tp_desc != NULL; tp++)
    277 		if (PCI_PRODUCT(id) == tp->tp_product)
    278 			break;
    279 
    280 	if (tp->tp_desc == NULL)
    281 		return (NULL);
    282 
    283 	return (tp);
    284 }
    285 
    286 static int
    287 tl_pci_match(parent, match, aux)
    288 	struct device *parent;
    289 	struct cfdata *match;
    290 	void *aux;
    291 {
    292 	struct pci_attach_args *pa = (struct pci_attach_args *) aux;
    293 
    294 	if (tl_lookup_product(pa->pa_id) != NULL)
    295 		return (1);
    296 
    297 	return (0);
    298 }
    299 
    300 static void
    301 tl_pci_attach(parent, self, aux)
    302 	struct device * parent;
    303 	struct device * self;
    304 	void * aux;
    305 {
    306 	tl_softc_t *sc = (tl_softc_t *)self;
    307 	struct pci_attach_args * const pa = (struct pci_attach_args *) aux;
    308 	const struct tl_product_desc *tp;
    309 	struct ifnet * const ifp = &sc->tl_if;
    310 	bus_space_tag_t iot, memt;
    311 	bus_space_handle_t ioh, memh;
    312 	pci_intr_handle_t intrhandle;
    313 	const char *intrstr;
    314 	int ioh_valid, memh_valid;
    315 	int reg_io, reg_mem;
    316 	pcireg_t reg10, reg14;
    317 	pcireg_t csr;
    318 
    319 	printf("\n");
    320 
    321 	callout_init(&sc->tl_tick_ch);
    322 	callout_init(&sc->tl_restart_ch);
    323 
    324 	tp = tl_lookup_product(pa->pa_id);
    325 	if (tp == NULL)
    326 		panic("tl_pci_attach: impossible");
    327 	sc->tl_product = tp;
    328 
    329 	/*
    330 	 * Map the card space. First we have to find the I/O and MEM
    331 	 * registers. I/O is supposed to be at 0x10, MEM at 0x14,
    332 	 * but some boards (Compaq Netflex 3/P PCI) seem to have it reversed.
    333 	 * The ThunderLAN manual is not consistent about this either (there
    334 	 * are both cases in code examples).
    335 	 */
    336 	reg10 = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x10);
    337 	reg14 = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x14);
    338 	if (PCI_MAPREG_TYPE(reg10) == PCI_MAPREG_TYPE_IO)
    339 		reg_io = 0x10;
    340 	else if (PCI_MAPREG_TYPE(reg14) == PCI_MAPREG_TYPE_IO)
    341 		reg_io = 0x14;
    342 	else
    343 		reg_io = 0;
    344 	if (PCI_MAPREG_TYPE(reg10) == PCI_MAPREG_TYPE_MEM)
    345 		reg_mem = 0x10;
    346 	else if (PCI_MAPREG_TYPE(reg14) == PCI_MAPREG_TYPE_MEM)
    347 		reg_mem = 0x14;
    348 	else
    349 		reg_mem = 0;
    350 
    351 	if (reg_io != 0)
    352 		ioh_valid = (pci_mapreg_map(pa, reg_io, PCI_MAPREG_TYPE_IO,
    353 		    0, &iot, &ioh, NULL, NULL) == 0);
    354 	else
    355 		ioh_valid = 0;
    356 	if (reg_mem != 0)
    357 		memh_valid = (pci_mapreg_map(pa, PCI_CBMA,
    358 		    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
    359 		    0, &memt, &memh, NULL, NULL) == 0);
    360 	else
    361 		memh_valid = 0;
    362 
    363 	if (ioh_valid) {
    364 		sc->tl_bustag = iot;
    365 		sc->tl_bushandle = ioh;
    366 	} else if (memh_valid) {
    367 		sc->tl_bustag = memt;
    368 		sc->tl_bushandle = memh;
    369 	} else {
    370 		printf("%s: unable to map device registers\n",
    371 		    sc->sc_dev.dv_xname);
    372 		return;
    373 	}
    374 	sc->tl_dmatag = pa->pa_dmat;
    375 
    376 	/* Enable the device. */
    377 	csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
    378 	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
    379 	    csr | PCI_COMMAND_MASTER_ENABLE);
    380 
    381 	printf("%s: %s\n", sc->sc_dev.dv_xname, tp->tp_desc);
    382 
    383 	tl_reset(sc);
    384 
    385 	/* fill in the i2c tag */
    386 	sc->sc_i2c.ic_cookie = sc;
    387 	sc->sc_i2c.ic_acquire_bus = tl_i2c_acquire_bus;
    388 	sc->sc_i2c.ic_release_bus = tl_i2c_release_bus;
    389 	sc->sc_i2c.ic_send_start = tl_i2c_send_start;
    390 	sc->sc_i2c.ic_send_stop = tl_i2c_send_stop;
    391 	sc->sc_i2c.ic_initiate_xfer = tl_i2c_initiate_xfer;
    392 	sc->sc_i2c.ic_read_byte = tl_i2c_read_byte;
    393 	sc->sc_i2c.ic_write_byte = tl_i2c_write_byte;
    394 
    395 #ifdef TLDEBUG
    396 	printf("default values of INTreg: 0x%x\n",
    397 	    tl_intreg_read(sc, TL_INT_Defaults));
    398 #endif
    399 
    400 	/* read mac addr */
    401 	if (seeprom_bootstrap_read(&sc->sc_i2c, 0x50, 0x83, 512/*?*/,
    402 				   sc->tl_enaddr, ETHER_ADDR_LEN)) {
    403 		printf("%s: error reading Ethernet address\n",
    404 		    sc->sc_dev.dv_xname);
    405 			return;
    406 	}
    407 	printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname,
    408 	    ether_sprintf(sc->tl_enaddr));
    409 
    410 	/* Map and establish interrupts */
    411 	if (pci_intr_map(pa, &intrhandle)) {
    412 		printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
    413 		return;
    414 	}
    415 	intrstr = pci_intr_string(pa->pa_pc, intrhandle);
    416 	sc->tl_if.if_softc = sc;
    417 	sc->tl_ih = pci_intr_establish(pa->pa_pc, intrhandle, IPL_NET,
    418 	    tl_intr, sc);
    419 	if (sc->tl_ih == NULL) {
    420 		printf("%s: couldn't establish interrupt",
    421 		    sc->sc_dev.dv_xname);
    422 		if (intrstr != NULL)
    423 			printf(" at %s", intrstr);
    424 		printf("\n");
    425 		return;
    426 	}
    427 	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
    428 
    429 	/* init these pointers, so that tl_shutdown won't try to read them */
    430 	sc->Rx_list = NULL;
    431 	sc->Tx_list = NULL;
    432 
    433 	/* allocate DMA-safe memory for control structs */
    434 	if (bus_dmamem_alloc(sc->tl_dmatag,
    435 	        PAGE_SIZE, 0, PAGE_SIZE,
    436 	        &sc->ctrl_segs, 1, &sc->ctrl_nsegs, BUS_DMA_NOWAIT) != 0 ||
    437 	    bus_dmamem_map(sc->tl_dmatag, &sc->ctrl_segs,
    438 		sc->ctrl_nsegs, PAGE_SIZE, (caddr_t*)&sc->ctrl,
    439 		BUS_DMA_NOWAIT | BUS_DMA_COHERENT) != 0) {
    440 			printf("%s: can't allocate DMA memory for lists\n",
    441 			    sc->sc_dev.dv_xname);
    442 			return;
    443 	}
    444 	/*
    445 	 * Add shutdown hook so that DMA is disabled prior to reboot. Not
    446 	 * doing
    447 	 * reboot before the driver initializes.
    448 	 */
    449 	(void) shutdownhook_establish(tl_shutdown, ifp);
    450 
    451 	/*
    452 	 * Initialize our media structures and probe the MII.
    453 	 *
    454 	 * Note that we don't care about the media instance.  We
    455 	 * are expecting to have multiple PHYs on the 10/100 cards,
    456 	 * and on those cards we exclude the internal PHY from providing
    457 	 * 10baseT.  By ignoring the instance, it allows us to not have
    458 	 * to specify it on the command line when switching media.
    459 	 */
    460 	sc->tl_mii.mii_ifp = ifp;
    461 	sc->tl_mii.mii_readreg = tl_mii_read;
    462 	sc->tl_mii.mii_writereg = tl_mii_write;
    463 	sc->tl_mii.mii_statchg = tl_statchg;
    464 	ifmedia_init(&sc->tl_mii.mii_media, IFM_IMASK, tl_mediachange,
    465 	    tl_mediastatus);
    466 	mii_attach(self, &sc->tl_mii, 0xffffffff, MII_PHY_ANY,
    467 	    MII_OFFSET_ANY, 0);
    468 	if (LIST_FIRST(&sc->tl_mii.mii_phys) == NULL) {
    469 		ifmedia_add(&sc->tl_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
    470 		ifmedia_set(&sc->tl_mii.mii_media, IFM_ETHER|IFM_NONE);
    471 	} else
    472 		ifmedia_set(&sc->tl_mii.mii_media, IFM_ETHER|IFM_AUTO);
    473 
    474 	/*
    475 	 * We can support 802.1Q VLAN-sized frames.
    476 	 */
    477 	sc->tl_ec.ec_capabilities |= ETHERCAP_VLAN_MTU;
    478 
    479 	strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
    480 	ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
    481 	ifp->if_ioctl = tl_ifioctl;
    482 	ifp->if_start = tl_ifstart;
    483 	ifp->if_watchdog = tl_ifwatchdog;
    484 	ifp->if_init = tl_init;
    485 	ifp->if_stop = tl_stop;
    486 	ifp->if_timer = 0;
    487 	IFQ_SET_READY(&ifp->if_snd);
    488 	if_attach(ifp);
    489 	ether_ifattach(&(sc)->tl_if, (sc)->tl_enaddr);
    490 
    491 #if NRND > 0
    492 	rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
    493 	    RND_TYPE_NET, 0);
    494 #endif
    495 }
    496 
    497 static void
    498 tl_reset(sc)
    499 	tl_softc_t *sc;
    500 {
    501 	int i;
    502 
    503 	/* read stats */
    504 	if (sc->tl_if.if_flags & IFF_RUNNING) {
    505 		callout_stop(&sc->tl_tick_ch);
    506 		tl_read_stats(sc);
    507 	}
    508 	/* Reset adapter */
    509 	TL_HR_WRITE(sc, TL_HOST_CMD,
    510 	    TL_HR_READ(sc, TL_HOST_CMD) | HOST_CMD_Ad_Rst);
    511 	DELAY(100000);
    512 	/* Disable interrupts */
    513 	TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_IntOff);
    514 	/* setup aregs & hash */
    515 	for (i = TL_INT_Areg0; i <= TL_INT_HASH2; i = i + 4)
    516 		tl_intreg_write(sc, i, 0);
    517 #ifdef TLDEBUG_ADDR
    518 	printf("Areg & hash registers: \n");
    519 	for (i = TL_INT_Areg0; i <= TL_INT_HASH2; i = i + 4)
    520 		printf("    reg %x: %x\n", i, tl_intreg_read(sc, i));
    521 #endif
    522 	/* Setup NetConfig */
    523 	tl_intreg_write(sc, TL_INT_NetConfig,
    524 	    TL_NETCONFIG_1F | TL_NETCONFIG_1chn | TL_NETCONFIG_PHY_EN);
    525 	/* Bsize: accept default */
    526 	/* TX commit in Acommit: accept default */
    527 	/* Load Ld_tmr and Ld_thr */
    528 	/* Ld_tmr = 3 */
    529 	TL_HR_WRITE(sc, TL_HOST_CMD, 0x3 | HOST_CMD_LdTmr);
    530 	/* Ld_thr = 0 */
    531 	TL_HR_WRITE(sc, TL_HOST_CMD, 0x0 | HOST_CMD_LdThr);
    532 	/* Unreset MII */
    533 	netsio_set(sc, TL_NETSIO_NMRST);
    534 	DELAY(100000);
    535 	sc->tl_mii.mii_media_status &= ~IFM_ACTIVE;
    536 }
    537 
    538 static void tl_shutdown(v)
    539 	void *v;
    540 {
    541 	tl_stop(v, 1);
    542 }
    543 
    544 static void tl_stop(ifp, disable)
    545 	struct ifnet *ifp;
    546 	int disable;
    547 {
    548 	tl_softc_t *sc = ifp->if_softc;
    549 	struct Tx_list *Tx;
    550 	int i;
    551 
    552 	if ((ifp->if_flags & IFF_RUNNING) == 0)
    553 		return;
    554 	/* disable interrupts */
    555 	TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_IntOff);
    556 	/* stop TX and RX channels */
    557 	TL_HR_WRITE(sc, TL_HOST_CMD,
    558 	    HOST_CMD_STOP | HOST_CMD_RT | HOST_CMD_Nes);
    559 	TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_STOP);
    560 	DELAY(100000);
    561 
    562 	/* stop statistics reading loop, read stats */
    563 	callout_stop(&sc->tl_tick_ch);
    564 	tl_read_stats(sc);
    565 
    566 	/* Down the MII. */
    567 	mii_down(&sc->tl_mii);
    568 
    569 	/* deallocate memory allocations */
    570 	if (sc->Rx_list) {
    571 		for (i=0; i< TL_NBUF; i++) {
    572 			if (sc->Rx_list[i].m) {
    573 				bus_dmamap_unload(sc->tl_dmatag,
    574 				    sc->Rx_list[i].m_dmamap);
    575 				m_freem(sc->Rx_list[i].m);
    576 			}
    577 			bus_dmamap_destroy(sc->tl_dmatag,
    578 			    sc->Rx_list[i].m_dmamap);
    579 			sc->Rx_list[i].m = NULL;
    580 		}
    581 		free(sc->Rx_list, M_DEVBUF);
    582 		sc->Rx_list = NULL;
    583 		bus_dmamap_unload(sc->tl_dmatag, sc->Rx_dmamap);
    584 		bus_dmamap_destroy(sc->tl_dmatag, sc->Rx_dmamap);
    585 		sc->hw_Rx_list = NULL;
    586 		while ((Tx = sc->active_Tx) != NULL) {
    587 			Tx->hw_list->stat = 0;
    588 			bus_dmamap_unload(sc->tl_dmatag, Tx->m_dmamap);
    589 			bus_dmamap_destroy(sc->tl_dmatag, Tx->m_dmamap);
    590 			m_freem(Tx->m);
    591 			sc->active_Tx = Tx->next;
    592 			Tx->next = sc->Free_Tx;
    593 			sc->Free_Tx = Tx;
    594 		}
    595 		sc->last_Tx = NULL;
    596 		free(sc->Tx_list, M_DEVBUF);
    597 		sc->Tx_list = NULL;
    598 		bus_dmamap_unload(sc->tl_dmatag, sc->Tx_dmamap);
    599 		bus_dmamap_destroy(sc->tl_dmatag, sc->Tx_dmamap);
    600 		sc->hw_Tx_list = NULL;
    601 	}
    602 	ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
    603 	ifp->if_timer = 0;
    604 	sc->tl_mii.mii_media_status &= ~IFM_ACTIVE;
    605 }
    606 
    607 static void tl_restart(v)
    608 	void *v;
    609 {
    610 	tl_init(v);
    611 }
    612 
    613 static int tl_init(ifp)
    614 	struct ifnet *ifp;
    615 {
    616 	tl_softc_t *sc = ifp->if_softc;
    617 	int i, s, error;
    618 	char *errstring;
    619 	char *nullbuf;
    620 
    621 	s = splnet();
    622 	/* cancel any pending IO */
    623 	tl_stop(ifp, 1);
    624 	tl_reset(sc);
    625 	if ((sc->tl_if.if_flags & IFF_UP) == 0) {
    626 		splx(s);
    627 		return 0;
    628 	}
    629 	/* Set various register to reasonable value */
    630 	/* setup NetCmd in promisc mode if needed */
    631 	i = (ifp->if_flags & IFF_PROMISC) ? TL_NETCOMMAND_CAF : 0;
    632 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetCmd,
    633 	    TL_NETCOMMAND_NRESET | TL_NETCOMMAND_NWRAP | i);
    634 	/* Max receive size : MCLBYTES */
    635 	tl_intreg_write_byte(sc, TL_INT_MISC + TL_MISC_MaxRxL, MCLBYTES & 0xff);
    636 	tl_intreg_write_byte(sc, TL_INT_MISC + TL_MISC_MaxRxH,
    637 	    (MCLBYTES >> 8) & 0xff);
    638 
    639 	/* init MAC addr */
    640 	for (i = 0; i < ETHER_ADDR_LEN; i++)
    641 		tl_intreg_write_byte(sc, TL_INT_Areg0 + i , sc->tl_enaddr[i]);
    642 	/* add multicast filters */
    643 	tl_addr_filter(sc);
    644 #ifdef TLDEBUG_ADDR
    645 	printf("Wrote Mac addr, Areg & hash registers are now: \n");
    646 	for (i = TL_INT_Areg0; i <= TL_INT_HASH2; i = i + 4)
    647 		printf("    reg %x: %x\n", i, tl_intreg_read(sc, i));
    648 #endif
    649 
    650 	/* Pre-allocate receivers mbuf, make the lists */
    651 	sc->Rx_list = malloc(sizeof(struct Rx_list) * TL_NBUF, M_DEVBUF,
    652 	    M_NOWAIT|M_ZERO);
    653 	sc->Tx_list = malloc(sizeof(struct Tx_list) * TL_NBUF, M_DEVBUF,
    654 	    M_NOWAIT|M_ZERO);
    655 	if (sc->Rx_list == NULL || sc->Tx_list == NULL) {
    656 		errstring = "out of memory for lists";
    657 		error = ENOMEM;
    658 		goto bad;
    659 	}
    660 	error = bus_dmamap_create(sc->tl_dmatag,
    661 	    sizeof(struct tl_Rx_list) * TL_NBUF, 1,
    662 	    sizeof(struct tl_Rx_list) * TL_NBUF, 0, BUS_DMA_WAITOK,
    663 	    &sc->Rx_dmamap);
    664 	if (error == 0)
    665 		error = bus_dmamap_create(sc->tl_dmatag,
    666 		    sizeof(struct tl_Tx_list) * TL_NBUF, 1,
    667 		    sizeof(struct tl_Tx_list) * TL_NBUF, 0, BUS_DMA_WAITOK,
    668 		    &sc->Tx_dmamap);
    669 	if (error == 0)
    670 		error = bus_dmamap_create(sc->tl_dmatag, ETHER_MIN_TX, 1,
    671 		    ETHER_MIN_TX, 0, BUS_DMA_WAITOK,
    672 		    &sc->null_dmamap);
    673 	if (error) {
    674 		errstring = "can't allocate DMA maps for lists";
    675 		goto bad;
    676 	}
    677 	memset(sc->ctrl, 0, PAGE_SIZE);
    678 	sc->hw_Rx_list = (void *)sc->ctrl;
    679 	sc->hw_Tx_list =
    680 	    (void *)(sc->ctrl + sizeof(struct tl_Rx_list) * TL_NBUF);
    681 	nullbuf = sc->ctrl + sizeof(struct tl_Rx_list) * TL_NBUF +
    682 	    sizeof(struct tl_Tx_list) * TL_NBUF;
    683 	error = bus_dmamap_load(sc->tl_dmatag, sc->Rx_dmamap,
    684 	    sc->hw_Rx_list, sizeof(struct tl_Rx_list) * TL_NBUF, NULL,
    685 	    BUS_DMA_WAITOK);
    686 	if (error == 0)
    687 		error = bus_dmamap_load(sc->tl_dmatag, sc->Tx_dmamap,
    688 		    sc->hw_Tx_list, sizeof(struct tl_Tx_list) * TL_NBUF, NULL,
    689 		    BUS_DMA_WAITOK);
    690 	if (error == 0)
    691 		error = bus_dmamap_load(sc->tl_dmatag, sc->null_dmamap,
    692 		    nullbuf, ETHER_MIN_TX, NULL, BUS_DMA_WAITOK);
    693 	if (error) {
    694 		errstring = "can't DMA map DMA memory for lists";
    695 		goto bad;
    696 	}
    697 	for (i=0; i< TL_NBUF; i++) {
    698 		error = bus_dmamap_create(sc->tl_dmatag, MCLBYTES,
    699 		    1, MCLBYTES, 0, BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW,
    700 		    &sc->Rx_list[i].m_dmamap);
    701 		if (error == 0) {
    702 			error = bus_dmamap_create(sc->tl_dmatag, MCLBYTES,
    703 			    TL_NSEG, MCLBYTES, 0,
    704 			    BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW,
    705 			    &sc->Tx_list[i].m_dmamap);
    706 		}
    707 		if (error) {
    708 			errstring = "can't allocate DMA maps for mbufs";
    709 			goto bad;
    710 		}
    711 		sc->Rx_list[i].hw_list = &sc->hw_Rx_list[i];
    712 		sc->Rx_list[i].hw_listaddr = sc->Rx_dmamap->dm_segs[0].ds_addr
    713 		    + sizeof(struct tl_Rx_list) * i;
    714 		sc->Tx_list[i].hw_list = &sc->hw_Tx_list[i];
    715 		sc->Tx_list[i].hw_listaddr = sc->Tx_dmamap->dm_segs[0].ds_addr
    716 		    + sizeof(struct tl_Tx_list) * i;
    717 		if (tl_add_RxBuff(sc, &sc->Rx_list[i], NULL) == 0) {
    718 			errstring = "out of mbuf for receive list";
    719 			error = ENOMEM;
    720 			goto bad;
    721 		}
    722 		if (i > 0) { /* chain the list */
    723 			sc->Rx_list[i - 1].next = &sc->Rx_list[i];
    724 			sc->hw_Rx_list[i - 1].fwd =
    725 			    htole32(sc->Rx_list[i].hw_listaddr);
    726 			sc->Tx_list[i - 1].next = &sc->Tx_list[i];
    727 		}
    728 	}
    729 	sc->hw_Rx_list[TL_NBUF - 1].fwd = 0;
    730 	sc->Rx_list[TL_NBUF - 1].next = NULL;
    731 	sc->hw_Tx_list[TL_NBUF - 1].fwd = 0;
    732 	sc->Tx_list[TL_NBUF - 1].next = NULL;
    733 
    734 	sc->active_Rx = &sc->Rx_list[0];
    735 	sc->last_Rx   = &sc->Rx_list[TL_NBUF - 1];
    736 	sc->active_Tx = sc->last_Tx = NULL;
    737 	sc->Free_Tx   = &sc->Tx_list[0];
    738 	bus_dmamap_sync(sc->tl_dmatag, sc->Rx_dmamap, 0,
    739 	    sizeof(struct tl_Rx_list) * TL_NBUF,
    740 	    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
    741 	bus_dmamap_sync(sc->tl_dmatag, sc->Tx_dmamap, 0,
    742 	    sizeof(struct tl_Tx_list) * TL_NBUF,
    743 	    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
    744 	bus_dmamap_sync(sc->tl_dmatag, sc->null_dmamap, 0, ETHER_MIN_TX,
    745 	    BUS_DMASYNC_PREWRITE);
    746 
    747 	/* set media */
    748 	mii_mediachg(&sc->tl_mii);
    749 
    750 	/* start ticks calls */
    751 	callout_reset(&sc->tl_tick_ch, hz, tl_ticks, sc);
    752 	/* write address of Rx list and enable interrupts */
    753 	TL_HR_WRITE(sc, TL_HOST_CH_PARM, sc->Rx_list[0].hw_listaddr);
    754 	TL_HR_WRITE(sc, TL_HOST_CMD,
    755 	    HOST_CMD_GO | HOST_CMD_RT | HOST_CMD_Nes | HOST_CMD_IntOn);
    756 	sc->tl_if.if_flags |= IFF_RUNNING;
    757 	sc->tl_if.if_flags &= ~IFF_OACTIVE;
    758 	return 0;
    759 bad:
    760 	printf("%s: %s\n", sc->sc_dev.dv_xname, errstring);
    761 	splx(s);
    762 	return error;
    763 }
    764 
    765 
    766 static u_int32_t
    767 tl_intreg_read(sc, reg)
    768 	tl_softc_t *sc;
    769 	u_int32_t reg;
    770 {
    771 	TL_HR_WRITE(sc, TL_HOST_INTR_DIOADR, reg & TL_HOST_DIOADR_MASK);
    772 	return TL_HR_READ(sc, TL_HOST_DIO_DATA);
    773 }
    774 
    775 static u_int8_t
    776 tl_intreg_read_byte(sc, reg)
    777 	tl_softc_t *sc;
    778 	u_int32_t reg;
    779 {
    780 	TL_HR_WRITE(sc, TL_HOST_INTR_DIOADR,
    781 	    (reg & (~0x07)) & TL_HOST_DIOADR_MASK);
    782 	return TL_HR_READ_BYTE(sc, TL_HOST_DIO_DATA + (reg & 0x07));
    783 }
    784 
    785 static void
    786 tl_intreg_write(sc, reg, val)
    787 	tl_softc_t *sc;
    788 	u_int32_t reg;
    789 	u_int32_t val;
    790 {
    791 	TL_HR_WRITE(sc, TL_HOST_INTR_DIOADR, reg & TL_HOST_DIOADR_MASK);
    792 	TL_HR_WRITE(sc, TL_HOST_DIO_DATA, val);
    793 }
    794 
    795 static void
    796 tl_intreg_write_byte(sc, reg, val)
    797 	tl_softc_t *sc;
    798 	u_int32_t reg;
    799 	u_int8_t val;
    800 {
    801 	TL_HR_WRITE(sc, TL_HOST_INTR_DIOADR,
    802 	    (reg & (~0x03)) & TL_HOST_DIOADR_MASK);
    803 	TL_HR_WRITE_BYTE(sc, TL_HOST_DIO_DATA + (reg & 0x03), val);
    804 }
    805 
    806 void
    807 tl_mii_sync(sc)
    808 	struct tl_softc *sc;
    809 {
    810 	int i;
    811 
    812 	netsio_clr(sc, TL_NETSIO_MTXEN);
    813 	for (i = 0; i < 32; i++) {
    814 		netsio_clr(sc, TL_NETSIO_MCLK);
    815 		netsio_set(sc, TL_NETSIO_MCLK);
    816 	}
    817 }
    818 
    819 void
    820 tl_mii_sendbits(sc, data, nbits)
    821 	struct tl_softc *sc;
    822 	u_int32_t data;
    823 	int nbits;
    824 {
    825 	int i;
    826 
    827 	netsio_set(sc, TL_NETSIO_MTXEN);
    828 	for (i = 1 << (nbits - 1); i; i = i >>  1) {
    829 		netsio_clr(sc, TL_NETSIO_MCLK);
    830 		netsio_read(sc, TL_NETSIO_MCLK);
    831 		if (data & i)
    832 			netsio_set(sc, TL_NETSIO_MDATA);
    833 		else
    834 			netsio_clr(sc, TL_NETSIO_MDATA);
    835 		netsio_set(sc, TL_NETSIO_MCLK);
    836 		netsio_read(sc, TL_NETSIO_MCLK);
    837 	}
    838 }
    839 
    840 int
    841 tl_mii_read(self, phy, reg)
    842 	struct device *self;
    843 	int phy, reg;
    844 {
    845 	struct tl_softc *sc = (struct tl_softc *)self;
    846 	int val = 0, i, err;
    847 
    848 	/*
    849 	 * Read the PHY register by manually driving the MII control lines.
    850 	 */
    851 
    852 	tl_mii_sync(sc);
    853 	tl_mii_sendbits(sc, MII_COMMAND_START, 2);
    854 	tl_mii_sendbits(sc, MII_COMMAND_READ, 2);
    855 	tl_mii_sendbits(sc, phy, 5);
    856 	tl_mii_sendbits(sc, reg, 5);
    857 
    858 	netsio_clr(sc, TL_NETSIO_MTXEN);
    859 	netsio_clr(sc, TL_NETSIO_MCLK);
    860 	netsio_set(sc, TL_NETSIO_MCLK);
    861 	netsio_clr(sc, TL_NETSIO_MCLK);
    862 
    863 	err = netsio_read(sc, TL_NETSIO_MDATA);
    864 	netsio_set(sc, TL_NETSIO_MCLK);
    865 
    866 	/* Even if an error occurs, must still clock out the cycle. */
    867 	for (i = 0; i < 16; i++) {
    868 		val <<= 1;
    869 		netsio_clr(sc, TL_NETSIO_MCLK);
    870 		if (err == 0 && netsio_read(sc, TL_NETSIO_MDATA))
    871 			val |= 1;
    872 		netsio_set(sc, TL_NETSIO_MCLK);
    873 	}
    874 	netsio_clr(sc, TL_NETSIO_MCLK);
    875 	netsio_set(sc, TL_NETSIO_MCLK);
    876 
    877 	return (err ? 0 : val);
    878 }
    879 
    880 void
    881 tl_mii_write(self, phy, reg, val)
    882 	struct device *self;
    883 	int phy, reg, val;
    884 {
    885 	struct tl_softc *sc = (struct tl_softc *)self;
    886 
    887 	/*
    888 	 * Write the PHY register by manually driving the MII control lines.
    889 	 */
    890 
    891 	tl_mii_sync(sc);
    892 	tl_mii_sendbits(sc, MII_COMMAND_START, 2);
    893 	tl_mii_sendbits(sc, MII_COMMAND_WRITE, 2);
    894 	tl_mii_sendbits(sc, phy, 5);
    895 	tl_mii_sendbits(sc, reg, 5);
    896 	tl_mii_sendbits(sc, MII_COMMAND_ACK, 2);
    897 	tl_mii_sendbits(sc, val, 16);
    898 
    899 	netsio_clr(sc, TL_NETSIO_MCLK);
    900 	netsio_set(sc, TL_NETSIO_MCLK);
    901 }
    902 
    903 void
    904 tl_statchg(self)
    905 	struct device *self;
    906 {
    907 	tl_softc_t *sc = (struct tl_softc *)self;
    908 	u_int32_t reg;
    909 
    910 #ifdef TLDEBUG
    911 	printf("tl_statchg, media %x\n", sc->tl_ifmedia.ifm_media);
    912 #endif
    913 
    914 	/*
    915 	 * We must keep the ThunderLAN and the PHY in sync as
    916 	 * to the status of full-duplex!
    917 	 */
    918 	reg = tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetCmd);
    919 	if (sc->tl_mii.mii_media_active & IFM_FDX)
    920 		reg |= TL_NETCOMMAND_DUPLEX;
    921 	else
    922 		reg &= ~TL_NETCOMMAND_DUPLEX;
    923 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetCmd, reg);
    924 }
    925 
    926 /********** I2C glue **********/
    927 
    928 static int
    929 tl_i2c_acquire_bus(void *cookie, int flags)
    930 {
    931 
    932 	/* private bus */
    933 	return (0);
    934 }
    935 
    936 static void
    937 tl_i2c_release_bus(void *cookie, int flags)
    938 {
    939 
    940 	/* private bus */
    941 }
    942 
    943 static int
    944 tl_i2c_send_start(void *cookie, int flags)
    945 {
    946 
    947 	return (i2c_bitbang_send_start(cookie, flags, &tl_i2cbb_ops));
    948 }
    949 
    950 static int
    951 tl_i2c_send_stop(void *cookie, int flags)
    952 {
    953 
    954 	return (i2c_bitbang_send_stop(cookie, flags, &tl_i2cbb_ops));
    955 }
    956 
    957 static int
    958 tl_i2c_initiate_xfer(void *cookie, i2c_addr_t addr, int flags)
    959 {
    960 
    961 	return (i2c_bitbang_initiate_xfer(cookie, addr, flags, &tl_i2cbb_ops));
    962 }
    963 
    964 static int
    965 tl_i2c_read_byte(void *cookie, uint8_t *valp, int flags)
    966 {
    967 
    968 	return (i2c_bitbang_read_byte(cookie, valp, flags, &tl_i2cbb_ops));
    969 }
    970 
    971 static int
    972 tl_i2c_write_byte(void *cookie, uint8_t val, int flags)
    973 {
    974 
    975 	return (i2c_bitbang_write_byte(cookie, val, flags, &tl_i2cbb_ops));
    976 }
    977 
    978 /********** I2C bit-bang glue **********/
    979 
    980 static void
    981 tl_i2cbb_set_bits(void *cookie, uint32_t bits)
    982 {
    983 	struct tl_softc *sc = cookie;
    984 	uint8_t reg;
    985 
    986 	reg = tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetSio);
    987 	reg = (reg & ~(TL_NETSIO_EDATA|TL_NETSIO_ECLOCK)) | bits;
    988 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetSio, reg);
    989 }
    990 
    991 static void
    992 tl_i2cbb_set_dir(void *cookie, uint32_t bits)
    993 {
    994 	struct tl_softc *sc = cookie;
    995 	uint8_t reg;
    996 
    997 	reg = tl_intreg_read_byte(sc, TL_INT_NET + TL_INT_NetSio);
    998 	reg = (reg & ~TL_NETSIO_ETXEN) | bits;
    999 	tl_intreg_write_byte(sc, TL_INT_NET + TL_INT_NetSio, reg);
   1000 }
   1001 
   1002 static uint32_t
   1003 tl_i2cbb_read(void *cookie)
   1004 {
   1005 
   1006 	return (tl_intreg_read_byte(cookie, TL_INT_NET + TL_INT_NetSio));
   1007 }
   1008 
   1009 /********** End of I2C stuff **********/
   1010 
   1011 static int
   1012 tl_intr(v)
   1013 	void *v;
   1014 {
   1015 	tl_softc_t *sc = v;
   1016 	struct ifnet *ifp = &sc->tl_if;
   1017 	struct Rx_list *Rx;
   1018 	struct Tx_list *Tx;
   1019 	struct mbuf *m;
   1020 	u_int32_t int_type, int_reg;
   1021 	int ack = 0;
   1022 	int size;
   1023 
   1024 	int_reg = TL_HR_READ(sc, TL_HOST_INTR_DIOADR);
   1025 	int_type = int_reg  & TL_INTR_MASK;
   1026 	if (int_type == 0)
   1027 		return 0;
   1028 #if defined(TLDEBUG_RX) || defined(TLDEBUG_TX)
   1029 	printf("%s: interrupt type %x, intr_reg %x\n", sc->sc_dev.dv_xname,
   1030 	    int_type, int_reg);
   1031 #endif
   1032 	/* disable interrupts */
   1033 	TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_IntOff);
   1034 	switch(int_type & TL_INTR_MASK) {
   1035 	case TL_INTR_RxEOF:
   1036 		bus_dmamap_sync(sc->tl_dmatag, sc->Rx_dmamap, 0,
   1037 		    sizeof(struct tl_Rx_list) * TL_NBUF,
   1038 		    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
   1039 		while(le32toh(sc->active_Rx->hw_list->stat) &
   1040 		    TL_RX_CSTAT_CPLT) {
   1041 			/* dequeue and requeue at end of list */
   1042 			ack++;
   1043 			Rx = sc->active_Rx;
   1044 			sc->active_Rx = Rx->next;
   1045 			bus_dmamap_sync(sc->tl_dmatag, Rx->m_dmamap, 0,
   1046 			    Rx->m_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD);
   1047 			bus_dmamap_unload(sc->tl_dmatag, Rx->m_dmamap);
   1048 			m = Rx->m;
   1049 			size = le32toh(Rx->hw_list->stat) >> 16;
   1050 #ifdef TLDEBUG_RX
   1051 			printf("tl_intr: RX list complete, Rx %p, size=%d\n",
   1052 			    Rx, size);
   1053 #endif
   1054 			if (tl_add_RxBuff(sc, Rx, m ) == 0) {
   1055 				/*
   1056 				 * No new mbuf, reuse the same. This means
   1057 				 * that this packet
   1058 				 * is lost
   1059 				 */
   1060 				m = NULL;
   1061 #ifdef TL_PRIV_STATS
   1062 				sc->ierr_nomem++;
   1063 #endif
   1064 #ifdef TLDEBUG
   1065 				printf("%s: out of mbuf, lost input packet\n",
   1066 				    sc->sc_dev.dv_xname);
   1067 #endif
   1068 			}
   1069 			Rx->next = NULL;
   1070 			Rx->hw_list->fwd = 0;
   1071 			sc->last_Rx->hw_list->fwd = htole32(Rx->hw_listaddr);
   1072 			sc->last_Rx->next = Rx;
   1073 			sc->last_Rx = Rx;
   1074 
   1075 			/* deliver packet */
   1076 			if (m) {
   1077 				if (size < sizeof(struct ether_header)) {
   1078 					m_freem(m);
   1079 					continue;
   1080 				}
   1081 				m->m_pkthdr.rcvif = ifp;
   1082 				m->m_pkthdr.len = m->m_len = size;
   1083 #ifdef TLDEBUG_RX
   1084 				{ struct ether_header *eh =
   1085 				    mtod(m, struct ether_header *);
   1086 				printf("tl_intr: Rx packet:\n");
   1087 				ether_printheader(eh); }
   1088 #endif
   1089 #if NBPFILTER > 0
   1090 				if (ifp->if_bpf)
   1091 					bpf_mtap(ifp->if_bpf, m);
   1092 #endif /* NBPFILTER > 0 */
   1093 				(*ifp->if_input)(ifp, m);
   1094 			}
   1095 		}
   1096 		bus_dmamap_sync(sc->tl_dmatag, sc->Rx_dmamap, 0,
   1097 		    sizeof(struct tl_Rx_list) * TL_NBUF,
   1098 		    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
   1099 #ifdef TLDEBUG_RX
   1100 		printf("TL_INTR_RxEOF: ack %d\n", ack);
   1101 #else
   1102 		if (ack == 0) {
   1103 			printf("%s: EOF intr without anything to read !\n",
   1104 			    sc->sc_dev.dv_xname);
   1105 			tl_reset(sc);
   1106 			/* shedule reinit of the board */
   1107 			callout_reset(&sc->tl_restart_ch, 1, tl_restart, sc);
   1108 			return(1);
   1109 		}
   1110 #endif
   1111 		break;
   1112 	case TL_INTR_RxEOC:
   1113 		ack++;
   1114 		bus_dmamap_sync(sc->tl_dmatag, sc->Rx_dmamap, 0,
   1115 		    sizeof(struct tl_Rx_list) * TL_NBUF,
   1116 		    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
   1117 #ifdef TLDEBUG_RX
   1118 		printf("TL_INTR_RxEOC: ack %d\n", ack);
   1119 #endif
   1120 #ifdef DIAGNOSTIC
   1121 		if (le32toh(sc->active_Rx->hw_list->stat) & TL_RX_CSTAT_CPLT) {
   1122 			printf("%s: Rx EOC interrupt and active Tx list not "
   1123 			    "cleared\n", sc->sc_dev.dv_xname);
   1124 			return 0;
   1125 		} else
   1126 #endif
   1127 		{
   1128 		/*
   1129 		 * write address of Rx list and send Rx GO command, ack
   1130 		 * interrupt and enable interrupts in one command
   1131 		 */
   1132 		TL_HR_WRITE(sc, TL_HOST_CH_PARM, sc->active_Rx->hw_listaddr);
   1133 		TL_HR_WRITE(sc, TL_HOST_CMD,
   1134 		    HOST_CMD_GO | HOST_CMD_RT | HOST_CMD_Nes | ack | int_type |
   1135 		    HOST_CMD_ACK | HOST_CMD_IntOn);
   1136 		return 1;
   1137 		}
   1138 	case TL_INTR_TxEOF:
   1139 	case TL_INTR_TxEOC:
   1140 		bus_dmamap_sync(sc->tl_dmatag, sc->Tx_dmamap, 0,
   1141 		    sizeof(struct tl_Tx_list) * TL_NBUF,
   1142 		    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
   1143 		while ((Tx = sc->active_Tx) != NULL) {
   1144 			if((le32toh(Tx->hw_list->stat) & TL_TX_CSTAT_CPLT) == 0)
   1145 				break;
   1146 			ack++;
   1147 #ifdef TLDEBUG_TX
   1148 			printf("TL_INTR_TxEOC: list 0x%x done\n",
   1149 			    (int)Tx->hw_listaddr);
   1150 #endif
   1151 			Tx->hw_list->stat = 0;
   1152 			bus_dmamap_sync(sc->tl_dmatag, Tx->m_dmamap, 0,
   1153 			    Tx->m_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
   1154 			bus_dmamap_unload(sc->tl_dmatag, Tx->m_dmamap);
   1155 			m_freem(Tx->m);
   1156 			Tx->m = NULL;
   1157 			sc->active_Tx = Tx->next;
   1158 			if (sc->active_Tx == NULL)
   1159 				sc->last_Tx = NULL;
   1160 			Tx->next = sc->Free_Tx;
   1161 			sc->Free_Tx = Tx;
   1162 		}
   1163 		bus_dmamap_sync(sc->tl_dmatag, sc->Tx_dmamap, 0,
   1164 		    sizeof(struct tl_Tx_list) * TL_NBUF,
   1165 		    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
   1166 		/* if this was an EOC, ACK immediatly */
   1167 		if (ack)
   1168 			sc->tl_if.if_flags &= ~IFF_OACTIVE;
   1169 		if (int_type == TL_INTR_TxEOC) {
   1170 #ifdef TLDEBUG_TX
   1171 			printf("TL_INTR_TxEOC: ack %d (will be set to 1)\n",
   1172 			    ack);
   1173 #endif
   1174 			TL_HR_WRITE(sc, TL_HOST_CMD, 1 | int_type |
   1175 			    HOST_CMD_ACK | HOST_CMD_IntOn);
   1176 			if ( sc->active_Tx != NULL) {
   1177 				/* needs a Tx go command */
   1178 				TL_HR_WRITE(sc, TL_HOST_CH_PARM,
   1179 				    sc->active_Tx->hw_listaddr);
   1180 				TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_GO);
   1181 			}
   1182 			sc->tl_if.if_timer = 0;
   1183 			if (IFQ_IS_EMPTY(&sc->tl_if.if_snd) == 0)
   1184 				tl_ifstart(&sc->tl_if);
   1185 			return 1;
   1186 		}
   1187 #ifdef TLDEBUG
   1188 		else {
   1189 			printf("TL_INTR_TxEOF: ack %d\n", ack);
   1190 		}
   1191 #endif
   1192 		sc->tl_if.if_timer = 0;
   1193 		if (IFQ_IS_EMPTY(&sc->tl_if.if_snd) == 0)
   1194 			tl_ifstart(&sc->tl_if);
   1195 		break;
   1196 	case TL_INTR_Stat:
   1197 		ack++;
   1198 #ifdef TLDEBUG
   1199 		printf("TL_INTR_Stat: ack %d\n", ack);
   1200 #endif
   1201 		tl_read_stats(sc);
   1202 		break;
   1203 	case TL_INTR_Adc:
   1204 		if (int_reg & TL_INTVec_MASK) {
   1205 			/* adapter check conditions */
   1206 			printf("%s: check condition, intvect=0x%x, "
   1207 			    "ch_param=0x%x\n", sc->sc_dev.dv_xname,
   1208 			    int_reg & TL_INTVec_MASK,
   1209 			    TL_HR_READ(sc, TL_HOST_CH_PARM));
   1210 			tl_reset(sc);
   1211 			/* shedule reinit of the board */
   1212 			callout_reset(&sc->tl_restart_ch, 1, tl_restart, sc);
   1213 			return(1);
   1214 		} else {
   1215 			u_int8_t netstat;
   1216 			/* Network status */
   1217 			netstat =
   1218 			    tl_intreg_read_byte(sc, TL_INT_NET+TL_INT_NetSts);
   1219 			printf("%s: network status, NetSts=%x\n",
   1220 			    sc->sc_dev.dv_xname, netstat);
   1221 			/* Ack interrupts */
   1222 			tl_intreg_write_byte(sc, TL_INT_NET+TL_INT_NetSts,
   1223 			    netstat);
   1224 			ack++;
   1225 		}
   1226 		break;
   1227 	default:
   1228 		printf("%s: unhandled interrupt code %x!\n",
   1229 		    sc->sc_dev.dv_xname, int_type);
   1230 		ack++;
   1231 	}
   1232 
   1233 	if (ack) {
   1234 		/* Ack the interrupt and enable interrupts */
   1235 		TL_HR_WRITE(sc, TL_HOST_CMD, ack | int_type | HOST_CMD_ACK |
   1236 		    HOST_CMD_IntOn);
   1237 #if NRND > 0
   1238 		if (RND_ENABLED(&sc->rnd_source))
   1239 			rnd_add_uint32(&sc->rnd_source, int_reg);
   1240 #endif
   1241 		return 1;
   1242 	}
   1243 	/* ack = 0 ; interrupt was perhaps not our. Just enable interrupts */
   1244 	TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_IntOn);
   1245 	return 0;
   1246 }
   1247 
   1248 static int
   1249 tl_ifioctl(ifp, cmd, data)
   1250 	struct ifnet *ifp;
   1251 	ioctl_cmd_t cmd;
   1252 	caddr_t data;
   1253 {
   1254 	struct tl_softc *sc = ifp->if_softc;
   1255 	struct ifreq *ifr = (struct ifreq *)data;
   1256 	int s, error;
   1257 
   1258 	s = splnet();
   1259 	switch(cmd) {
   1260 	case SIOCSIFMEDIA:
   1261 	case SIOCGIFMEDIA:
   1262 		error = ifmedia_ioctl(ifp, ifr, &sc->tl_mii.mii_media, cmd);
   1263 		break;
   1264 	default:
   1265 		error = ether_ioctl(ifp, cmd, data);
   1266 		if (error == ENETRESET) {
   1267 			if (ifp->if_flags & IFF_RUNNING)
   1268 				tl_addr_filter(sc);
   1269 			error = 0;
   1270 		}
   1271 	}
   1272 	splx(s);
   1273 	return error;
   1274 }
   1275 
   1276 static void
   1277 tl_ifstart(ifp)
   1278 	struct ifnet *ifp;
   1279 {
   1280 	tl_softc_t *sc = ifp->if_softc;
   1281 	struct mbuf *mb_head;
   1282 	struct Tx_list *Tx;
   1283 	int segment, size;
   1284 	int again, error;
   1285 
   1286 	if ((sc->tl_if.if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)
   1287 		return;
   1288 txloop:
   1289 	/* If we don't have more space ... */
   1290 	if (sc->Free_Tx == NULL) {
   1291 #ifdef TLDEBUG
   1292 		printf("tl_ifstart: No free TX list\n");
   1293 #endif
   1294 		sc->tl_if.if_flags |= IFF_OACTIVE;
   1295 		return;
   1296 	}
   1297 	/* Grab a paquet for output */
   1298 	IFQ_DEQUEUE(&ifp->if_snd, mb_head);
   1299 	if (mb_head == NULL) {
   1300 #ifdef TLDEBUG_TX
   1301 		printf("tl_ifstart: nothing to send\n");
   1302 #endif
   1303 		return;
   1304 	}
   1305 	Tx = sc->Free_Tx;
   1306 	sc->Free_Tx = Tx->next;
   1307 	Tx->next = NULL;
   1308 	again = 0;
   1309 	/*
   1310 	 * Go through each of the mbufs in the chain and initialize
   1311 	 * the transmit list descriptors with the physical address
   1312 	 * and size of the mbuf.
   1313 	 */
   1314 tbdinit:
   1315 	memset(Tx->hw_list, 0, sizeof(struct tl_Tx_list));
   1316 	Tx->m = mb_head;
   1317 	size = mb_head->m_pkthdr.len;
   1318 	if ((error = bus_dmamap_load_mbuf(sc->tl_dmatag, Tx->m_dmamap, mb_head,
   1319 	    BUS_DMA_NOWAIT)) || (size < ETHER_MIN_TX &&
   1320 	    Tx->m_dmamap->dm_nsegs == TL_NSEG)) {
   1321 		struct mbuf *mn;
   1322 		/*
   1323 		 * We ran out of segments, or we will. We have to recopy this
   1324 		 * mbuf chain first.
   1325 		 */
   1326 		 if (error == 0)
   1327 			bus_dmamap_unload(sc->tl_dmatag, Tx->m_dmamap);
   1328 		 if (again) {
   1329 			/* already copyed, can't do much more */
   1330 			m_freem(mb_head);
   1331 			goto bad;
   1332 		}
   1333 		again = 1;
   1334 #ifdef TLDEBUG_TX
   1335 		printf("tl_ifstart: need to copy mbuf\n");
   1336 #endif
   1337 #ifdef TL_PRIV_STATS
   1338 		sc->oerr_mcopy++;
   1339 #endif
   1340 		MGETHDR(mn, M_DONTWAIT, MT_DATA);
   1341 		if (mn == NULL) {
   1342 			m_freem(mb_head);
   1343 			goto bad;
   1344 		}
   1345 		if (mb_head->m_pkthdr.len > MHLEN) {
   1346 			MCLGET(mn, M_DONTWAIT);
   1347 			if ((mn->m_flags & M_EXT) == 0) {
   1348 				m_freem(mn);
   1349 				m_freem(mb_head);
   1350 				goto bad;
   1351 			}
   1352 		}
   1353 		m_copydata(mb_head, 0, mb_head->m_pkthdr.len,
   1354 		    mtod(mn, caddr_t));
   1355 		mn->m_pkthdr.len = mn->m_len = mb_head->m_pkthdr.len;
   1356 		m_freem(mb_head);
   1357 		mb_head = mn;
   1358 		goto tbdinit;
   1359 	}
   1360 	for (segment = 0; segment < Tx->m_dmamap->dm_nsegs; segment++) {
   1361 		Tx->hw_list->seg[segment].data_addr =
   1362 		    htole32(Tx->m_dmamap->dm_segs[segment].ds_addr);
   1363 		Tx->hw_list->seg[segment].data_count =
   1364 		    htole32(Tx->m_dmamap->dm_segs[segment].ds_len);
   1365 	}
   1366 	bus_dmamap_sync(sc->tl_dmatag, Tx->m_dmamap, 0,
   1367 	    Tx->m_dmamap->dm_mapsize,
   1368 	    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
   1369 	/* We are at end of mbuf chain. check the size and
   1370 	 * see if it needs to be extended
   1371 	 */
   1372 	if (size < ETHER_MIN_TX) {
   1373 #ifdef DIAGNOSTIC
   1374 		if (segment >= TL_NSEG) {
   1375 			panic("tl_ifstart: to much segmets (%d)", segment);
   1376 		}
   1377 #endif
   1378 		/*
   1379 	 	 * add the nullbuf in the seg
   1380 	 	 */
   1381 		Tx->hw_list->seg[segment].data_count =
   1382 		    htole32(ETHER_MIN_TX - size);
   1383 		Tx->hw_list->seg[segment].data_addr =
   1384 		    htole32(sc->null_dmamap->dm_segs[0].ds_addr);
   1385 		size = ETHER_MIN_TX;
   1386 		segment++;
   1387 	}
   1388 	/* The list is done, finish the list init */
   1389 	Tx->hw_list->seg[segment - 1].data_count |=
   1390 	    htole32(TL_LAST_SEG);
   1391 	Tx->hw_list->stat = htole32((size << 16) | 0x3000);
   1392 #ifdef TLDEBUG_TX
   1393 	printf("%s: sending, Tx : stat = 0x%x\n", sc->sc_dev.dv_xname,
   1394 	    le32toh(Tx->hw_list->stat));
   1395 #if 0
   1396 	for(segment = 0; segment < TL_NSEG; segment++) {
   1397 		printf("    seg %d addr 0x%x len 0x%x\n",
   1398 		    segment,
   1399 		    le32toh(Tx->hw_list->seg[segment].data_addr),
   1400 		    le32toh(Tx->hw_list->seg[segment].data_count));
   1401 	}
   1402 #endif
   1403 #endif
   1404 	if (sc->active_Tx == NULL) {
   1405 		sc->active_Tx = sc->last_Tx = Tx;
   1406 #ifdef TLDEBUG_TX
   1407 		printf("%s: Tx GO, addr=0x%ux\n", sc->sc_dev.dv_xname,
   1408 		    (int)Tx->hw_listaddr);
   1409 #endif
   1410 		bus_dmamap_sync(sc->tl_dmatag, sc->Tx_dmamap, 0,
   1411 		    sizeof(struct tl_Tx_list) * TL_NBUF,
   1412 		    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
   1413 		TL_HR_WRITE(sc, TL_HOST_CH_PARM, Tx->hw_listaddr);
   1414 		TL_HR_WRITE(sc, TL_HOST_CMD, HOST_CMD_GO);
   1415 	} else {
   1416 #ifdef TLDEBUG_TX
   1417 		printf("%s: Tx addr=0x%ux queued\n", sc->sc_dev.dv_xname,
   1418 		    (int)Tx->hw_listaddr);
   1419 #endif
   1420 		sc->last_Tx->hw_list->fwd = htole32(Tx->hw_listaddr);
   1421 		bus_dmamap_sync(sc->tl_dmatag, sc->Tx_dmamap, 0,
   1422 		    sizeof(struct tl_Tx_list) * TL_NBUF,
   1423 		    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
   1424 		sc->last_Tx->next = Tx;
   1425 		sc->last_Tx = Tx;
   1426 #ifdef DIAGNOSTIC
   1427 		if (sc->last_Tx->hw_list->fwd & 0x7)
   1428 			printf("%s: physical addr 0x%x of list not properly "
   1429 			   "aligned\n",
   1430 			   sc->sc_dev.dv_xname, sc->last_Rx->hw_list->fwd);
   1431 #endif
   1432 	}
   1433 #if NBPFILTER > 0
   1434 	/* Pass packet to bpf if there is a listener */
   1435 	if (ifp->if_bpf)
   1436 		bpf_mtap(ifp->if_bpf, mb_head);
   1437 #endif
   1438 	/*
   1439 	 * Set a 5 second timer just in case we don't hear from the card again.
   1440 	 */
   1441 	ifp->if_timer = 5;
   1442 	goto txloop;
   1443 bad:
   1444 #ifdef TLDEBUG
   1445 	printf("tl_ifstart: Out of mbuf, Tx pkt lost\n");
   1446 #endif
   1447 	Tx->next = sc->Free_Tx;
   1448 	sc->Free_Tx = Tx;
   1449 	return;
   1450 }
   1451 
   1452 static void
   1453 tl_ifwatchdog(ifp)
   1454 	struct ifnet *ifp;
   1455 {
   1456 	tl_softc_t *sc = ifp->if_softc;
   1457 
   1458 	if ((ifp->if_flags & IFF_RUNNING) == 0)
   1459 		return;
   1460 	printf("%s: device timeout\n", sc->sc_dev.dv_xname);
   1461 	ifp->if_oerrors++;
   1462 	tl_init(ifp);
   1463 }
   1464 
   1465 static int
   1466 tl_mediachange(ifp)
   1467 	struct ifnet *ifp;
   1468 {
   1469 
   1470 	if (ifp->if_flags & IFF_UP)
   1471 		tl_init(ifp);
   1472 	return (0);
   1473 }
   1474 
   1475 static void
   1476 tl_mediastatus(ifp, ifmr)
   1477 	struct ifnet *ifp;
   1478 	struct ifmediareq *ifmr;
   1479 {
   1480 	tl_softc_t *sc = ifp->if_softc;
   1481 
   1482 	mii_pollstat(&sc->tl_mii);
   1483 	ifmr->ifm_active = sc->tl_mii.mii_media_active;
   1484 	ifmr->ifm_status = sc->tl_mii.mii_media_status;
   1485 }
   1486 
   1487 static int tl_add_RxBuff(sc, Rx, oldm)
   1488 	tl_softc_t *sc;
   1489 	struct Rx_list *Rx;
   1490 	struct mbuf *oldm;
   1491 {
   1492 	struct mbuf *m;
   1493 	int error;
   1494 
   1495 	MGETHDR(m, M_DONTWAIT, MT_DATA);
   1496 	if (m != NULL) {
   1497 		MCLGET(m, M_DONTWAIT);
   1498 		if ((m->m_flags & M_EXT) == 0) {
   1499 			m_freem(m);
   1500 			if (oldm == NULL)
   1501 				return 0;
   1502 			m = oldm;
   1503 			m->m_data = m->m_ext.ext_buf;
   1504 		}
   1505 	} else {
   1506 		if (oldm == NULL)
   1507 			return 0;
   1508 		m = oldm;
   1509 		m->m_data = m->m_ext.ext_buf;
   1510 	}
   1511 
   1512 	/* (re)init the Rx_list struct */
   1513 
   1514 	Rx->m = m;
   1515 	if ((error = bus_dmamap_load(sc->tl_dmatag, Rx->m_dmamap,
   1516 	    m->m_ext.ext_buf, m->m_ext.ext_size, NULL, BUS_DMA_NOWAIT)) != 0) {
   1517 		printf("%s: bus_dmamap_load() failed (error %d) for "
   1518 		    "tl_add_RxBuff\n", sc->sc_dev.dv_xname, error);
   1519 		printf("size %d (%d)\n", m->m_pkthdr.len, MCLBYTES);
   1520 		m_freem(m);
   1521 		Rx->m = NULL;
   1522 		return 0;
   1523 	}
   1524 	bus_dmamap_sync(sc->tl_dmatag, Rx->m_dmamap, 0,
   1525 	    Rx->m_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD);
   1526 	/*
   1527 	 * Move the data pointer up so that the incoming data packet
   1528 	 * will be 32-bit aligned.
   1529 	 */
   1530 	m->m_data += 2;
   1531 
   1532 	Rx->hw_list->stat =
   1533 	    htole32(((Rx->m_dmamap->dm_segs[0].ds_len - 2) << 16) | 0x3000);
   1534 	Rx->hw_list->seg.data_count =
   1535 	    htole32(Rx->m_dmamap->dm_segs[0].ds_len - 2);
   1536 	Rx->hw_list->seg.data_addr =
   1537 	    htole32(Rx->m_dmamap->dm_segs[0].ds_addr + 2);
   1538 	return (m != oldm);
   1539 }
   1540 
   1541 static void tl_ticks(v)
   1542 	void *v;
   1543 {
   1544 	tl_softc_t *sc = v;
   1545 
   1546 	tl_read_stats(sc);
   1547 
   1548 	/* Tick the MII. */
   1549 	mii_tick(&sc->tl_mii);
   1550 
   1551 	/* read statistics every seconds */
   1552 	callout_reset(&sc->tl_tick_ch, hz, tl_ticks, sc);
   1553 }
   1554 
   1555 static void
   1556 tl_read_stats(sc)
   1557 	tl_softc_t *sc;
   1558 {
   1559 	u_int32_t reg;
   1560 	int ierr_overr;
   1561 	int ierr_code;
   1562 	int ierr_crc;
   1563 	int oerr_underr;
   1564 	int oerr_deferred;
   1565 	int oerr_coll;
   1566 	int oerr_multicoll;
   1567 	int oerr_exesscoll;
   1568 	int oerr_latecoll;
   1569 	int oerr_carrloss;
   1570 	struct ifnet *ifp = &sc->tl_if;
   1571 
   1572 	reg =  tl_intreg_read(sc, TL_INT_STATS_TX);
   1573 	ifp->if_opackets += reg & 0x00ffffff;
   1574 	oerr_underr = reg >> 24;
   1575 
   1576 	reg =  tl_intreg_read(sc, TL_INT_STATS_RX);
   1577 	ifp->if_ipackets += reg & 0x00ffffff;
   1578 	ierr_overr = reg >> 24;
   1579 
   1580 	reg =  tl_intreg_read(sc, TL_INT_STATS_FERR);
   1581 	ierr_crc = (reg & TL_FERR_CRC) >> 16;
   1582 	ierr_code = (reg & TL_FERR_CODE) >> 24;
   1583 	oerr_deferred = (reg & TL_FERR_DEF);
   1584 
   1585 	reg =  tl_intreg_read(sc, TL_INT_STATS_COLL);
   1586 	oerr_multicoll = (reg & TL_COL_MULTI);
   1587 	oerr_coll = (reg & TL_COL_SINGLE) >> 16;
   1588 
   1589 	reg =  tl_intreg_read(sc, TL_INT_LERR);
   1590 	oerr_exesscoll = (reg & TL_LERR_ECOLL);
   1591 	oerr_latecoll = (reg & TL_LERR_LCOLL) >> 8;
   1592 	oerr_carrloss = (reg & TL_LERR_CL) >> 16;
   1593 
   1594 
   1595 	ifp->if_oerrors += oerr_underr + oerr_exesscoll + oerr_latecoll +
   1596 	   oerr_carrloss;
   1597 	ifp->if_collisions += oerr_coll + oerr_multicoll;
   1598 	ifp->if_ierrors += ierr_overr + ierr_code + ierr_crc;
   1599 
   1600 	if (ierr_overr)
   1601 		printf("%s: receiver ring buffer overrun\n",
   1602 		    sc->sc_dev.dv_xname);
   1603 	if (oerr_underr)
   1604 		printf("%s: transmit buffer underrun\n",
   1605 		    sc->sc_dev.dv_xname);
   1606 #ifdef TL_PRIV_STATS
   1607 	sc->ierr_overr		+= ierr_overr;
   1608 	sc->ierr_code		+= ierr_code;
   1609 	sc->ierr_crc		+= ierr_crc;
   1610 	sc->oerr_underr		+= oerr_underr;
   1611 	sc->oerr_deferred	+= oerr_deferred;
   1612 	sc->oerr_coll		+= oerr_coll;
   1613 	sc->oerr_multicoll	+= oerr_multicoll;
   1614 	sc->oerr_exesscoll	+= oerr_exesscoll;
   1615 	sc->oerr_latecoll	+= oerr_latecoll;
   1616 	sc->oerr_carrloss	+= oerr_carrloss;
   1617 #endif
   1618 }
   1619 
   1620 static void tl_addr_filter(sc)
   1621 	tl_softc_t *sc;
   1622 {
   1623 	struct ether_multistep step;
   1624 	struct ether_multi *enm;
   1625 	u_int32_t hash[2] = {0, 0};
   1626 	int i;
   1627 
   1628 	sc->tl_if.if_flags &= ~IFF_ALLMULTI;
   1629 	ETHER_FIRST_MULTI(step, &sc->tl_ec, enm);
   1630 	while (enm != NULL) {
   1631 #ifdef TLDEBUG
   1632 		printf("tl_addr_filter: addrs %s %s\n",
   1633 		   ether_sprintf(enm->enm_addrlo),
   1634 		   ether_sprintf(enm->enm_addrhi));
   1635 #endif
   1636 		if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) == 0) {
   1637 			i = tl_multicast_hash(enm->enm_addrlo);
   1638 			hash[i/32] |= 1 << (i%32);
   1639 		} else {
   1640 			hash[0] = hash[1] = 0xffffffff;
   1641 			sc->tl_if.if_flags |= IFF_ALLMULTI;
   1642 			break;
   1643 		}
   1644 		ETHER_NEXT_MULTI(step, enm);
   1645 	}
   1646 #ifdef TLDEBUG
   1647 	printf("tl_addr_filer: hash1 %x has2 %x\n", hash[0], hash[1]);
   1648 #endif
   1649 	tl_intreg_write(sc, TL_INT_HASH1, hash[0]);
   1650 	tl_intreg_write(sc, TL_INT_HASH2, hash[1]);
   1651 }
   1652 
   1653 static int tl_multicast_hash(a)
   1654 	u_int8_t *a;
   1655 {
   1656 	int hash;
   1657 
   1658 #define DA(addr,bit) (addr[5 - (bit/8)] & (1 << bit%8))
   1659 #define xor8(a,b,c,d,e,f,g,h) (((a != 0) + (b != 0) + (c != 0) + (d != 0) + (e != 0) + (f != 0) + (g != 0) + (h != 0)) & 1)
   1660 
   1661 	hash  = xor8( DA(a,0), DA(a, 6), DA(a,12), DA(a,18), DA(a,24), DA(a,30),
   1662 	    DA(a,36), DA(a,42));
   1663 	hash |= xor8( DA(a,1), DA(a, 7), DA(a,13), DA(a,19), DA(a,25), DA(a,31),
   1664 	    DA(a,37), DA(a,43)) << 1;
   1665 	hash |= xor8( DA(a,2), DA(a, 8), DA(a,14), DA(a,20), DA(a,26), DA(a,32),
   1666 	    DA(a,38), DA(a,44)) << 2;
   1667 	hash |= xor8( DA(a,3), DA(a, 9), DA(a,15), DA(a,21), DA(a,27), DA(a,33),
   1668 	    DA(a,39), DA(a,45)) << 3;
   1669 	hash |= xor8( DA(a,4), DA(a,10), DA(a,16), DA(a,22), DA(a,28), DA(a,34),
   1670 	    DA(a,40), DA(a,46)) << 4;
   1671 	hash |= xor8( DA(a,5), DA(a,11), DA(a,17), DA(a,23), DA(a,29), DA(a,35),
   1672 	    DA(a,41), DA(a,47)) << 5;
   1673 
   1674 	return hash;
   1675 }
   1676 
   1677 #if defined(TLDEBUG_RX)
   1678 void
   1679 ether_printheader(eh)
   1680 	struct ether_header *eh;
   1681 {
   1682 	u_char *c = (char*)eh;
   1683 	int i;
   1684 	for (i=0; i<sizeof(struct ether_header); i++)
   1685 		printf("%x ", (u_int)c[i]);
   1686 		printf("\n");
   1687 }
   1688 #endif
   1689