sys/net/i4b/layer1/ifpnp/i4b_ifpnp_avm.c

   1 /*
   2  *   Copyright (c) 1999, 2000 Udo Schweigert. All rights reserved.
   3  *
   4  *   Redistribution and use in source and binary forms, with or without
   5  *   modification, are permitted provided that the following conditions
   6  *   are met:
   7  *
   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  *   3. Neither the name of the author nor the names of any co-contributors
  14  *      may be used to endorse or promote products derived from this software
  15  *      without specific prior written permission.
  16  *   4. Altered versions must be plainly marked as such, and must not be
  17  *      misrepresented as being the original software and/or documentation.
  18  *
  19  *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  *   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  *   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  *   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  *   SUCH DAMAGE.
  30  *
  31  *---------------------------------------------------------------------------
  32  *
  33  *      i4b_ifpnp_avm.c: AVM Fritz!Card PnP hardware driver
  34  *      ---------------------------------------------------
  35  *
  36  * $FreeBSD: src/sys/i4b/layer1/ifpnp/i4b_ifpnp_avm.c,v 1.5.2.1 2001/08/10 14:08:37 obrien Exp $
  37  * $DragonFly: src/sys/net/i4b/layer1/ifpnp/i4b_ifpnp_avm.c,v 1.4 2003/08/07 21:17:26 dillon Exp $
  38  *
  39  *      last edit-date: [Fri Jan 12 17:05:28 2001]
  40  *
  41  *---------------------------------------------------------------------------*/
  42
  43 #include "use_ifpnp.h"
  44 #include "opt_i4b.h"
  45
  46 #if (NIFPNP > 0)
  47
  48 #include <sys/param.h>
  49 #include <sys/kernel.h>
  50 #include <sys/systm.h>
  51 #include <sys/mbuf.h>
  52
  53 #include <machine/bus.h>
  54 #include <sys/bus.h>
  55 #include <sys/rman.h>
  56
  57 #include <bus/isa/isavar.h>
  58
  59 #include <sys/socket.h>
  60 #include <net/if.h>
  61
  62 #include <net/i4b/include/machine/i4b_debug.h>
  63 #include <net/i4b/include/machine/i4b_ioctl.h>
  64 #include <net/i4b/include/machine/i4b_trace.h>
  65
  66 #include "../../include/i4b_global.h"
  67 #include "../../include/i4b_mbuf.h"
  68
  69 #include "../i4b_l1.h"
  70 #include "../isic/i4b_isic.h"
  71 #include "../isic/i4b_isac.h"
  72 #include "../isic/i4b_hscx.h"
  73
  74 #include "i4b_ifpnp_ext.h"
  75
  76 /* prototypes */
  77 static void avm_pnp_intr(void *);
  78 static void hscx_write_reg(int, u_int, struct l1_softc *, u_int);
  79 static void hscx_write_reg_val(int, u_int, u_int8_t, struct l1_softc *);
  80 static u_int hscx_read_reg(int, u_int, struct l1_softc *);
  81 static void hscx_read_fifo(int, void *, size_t, struct l1_softc *);
  82 static void hscx_write_fifo(int, void *, size_t, struct l1_softc *);
  83 static void avm_pnp_hscx_int_handler(struct l1_softc *);
  84 static void avm_pnp_hscx_intr(int, u_int, u_int, struct l1_softc *);
  85 static void avm_pnp_init_linktab(struct l1_softc *);
  86 static void avm_pnp_bchannel_setup(int, int, int, int);
  87 static void avm_pnp_bchannel_start(int, int);
  88 static void avm_pnp_hscx_init(struct l1_softc *, int, int);
  89 static void avm_pnp_bchannel_stat(int, int, bchan_statistics_t *);
  90 static void avm_pnp_set_linktab(int, int, drvr_link_t *);
  91 static isdn_link_t * avm_pnp_ret_linktab(int, int);
  92 static int avm_pnp_probe(device_t);
  93 static int avm_pnp_hscx_fifo(l1_bchan_state_t *, struct l1_softc *);
  94 int avm_pnp_attach(device_t);
  95 static void ifpnp_isac_intr(struct l1_softc *sc);
  96
  97 static device_method_t avm_pnp_methods[] = {
  98         /* Device interface */
  99         DEVMETHOD(device_probe,         avm_pnp_probe),
 100         DEVMETHOD(device_attach,        avm_pnp_attach),
 101         { 0, 0 }
 102 };
 103
 104 static driver_t avm_pnp_driver = {
 105         "ifpnp",
 106         avm_pnp_methods,
 107         sizeof(struct l1_softc)
 108 };
 109
 110 static devclass_t avm_pnp_devclass;
 111
 112 DRIVER_MODULE(avm_pnp, isa, avm_pnp_driver, avm_pnp_devclass, 0, 0);
 113
 114 /* jump table for multiplex routines */
 115
 116 struct i4b_l1mux_func avm_pnp_l1mux_func = {
 117         avm_pnp_ret_linktab,
 118         avm_pnp_set_linktab,
 119         ifpnp_mph_command_req,
 120         ifpnp_ph_data_req,
 121         ifpnp_ph_activate_req,
 122 };
 123
 124 struct l1_softc *ifpnp_scp[IFPNP_MAXUNIT];
 125
 126 /*---------------------------------------------------------------------------*
 127  *      AVM PnP Fritz!Card special registers
 128  *---------------------------------------------------------------------------*/
 129
 130 /*
 131  *      register offsets from i/o base
 132  */
 133 #define CLASS_OFFSET            0x00
 134 #define REVISION_OFFSET         0x01
 135 #define STAT0_OFFSET            0x02
 136 #define STAT1_OFFSET            0x03
 137 #define ADDR_REG_OFFSET         0x04
 138 /*#define MODREG_OFFSET         0x06
 139 #define VERREG_OFFSET           0x07*/
 140
 141 /* these 2 are used to select an ISAC register set */
 142 #define ISAC_LO_REG_OFFSET      0x04
 143 #define ISAC_HI_REG_OFFSET      0x06
 144
 145 /* offset higher than this goes to the HI register set */
 146 #define MAX_LO_REG_OFFSET       0x2f
 147
 148 /* mask for the offset */
 149 #define ISAC_REGSET_MASK        0x0f
 150
 151 /* the offset from the base to the ISAC registers */
 152 #define ISAC_REG_OFFSET         0x10
 153
 154 /* the offset from the base to the ISAC FIFO */
 155 #define ISAC_FIFO               0x02
 156
 157 /* not really the HSCX, but sort of */
 158 #define HSCX_FIFO               0x00
 159 #define HSCX_STAT               0x04
 160
 161 /*
 162  *      AVM PnP Status Latch 0 read only bits
 163  */
 164 #define ASL_IRQ_ISAC            0x01    /* ISAC  interrupt, active low */
 165 #define ASL_IRQ_HSCX            0x02    /* HSX   interrupt, active low */
 166 #define ASL_IRQ_TIMER           0x04    /* Timer interrupt, active low */
 167 #define ASL_IRQ_BCHAN           ASL_IRQ_HSCX
 168 /* actually active LOW */
 169 #define ASL_IRQ_Pending         (ASL_IRQ_ISAC | ASL_IRQ_HSCX | ASL_IRQ_TIMER)
 170
 171 /*
 172  *      AVM Status Latch 0 write only bits
 173  */
 174 #define ASL_RESET_ALL           0x01  /* reset siemens IC's, active 1 */
 175 #define ASL_TIMERDISABLE        0x02  /* active high */
 176 #define ASL_TIMERRESET          0x04  /* active high */
 177 #define ASL_ENABLE_INT          0x08  /* active high */
 178 #define ASL_TESTBIT             0x10  /* active high */
 179
 180 /*
 181  *      AVM Status Latch 1 write only bits
 182  */
 183 #define ASL1_INTSEL              0x0f  /* active high */
 184 #define ASL1_ENABLE_IOM          0x80  /* active high */
 185
 186 /*
 187  * "HSCX" mode bits
 188  */
 189 #define  HSCX_MODE_ITF_FLG      0x01
 190 #define  HSCX_MODE_TRANS        0x02
 191 #define  HSCX_MODE_CCR_7        0x04
 192 #define  HSCX_MODE_CCR_16       0x08
 193 #define  HSCX_MODE_TESTLOOP     0x80
 194
 195 /*
 196  * "HSCX" status bits
 197  */
 198 #define  HSCX_STAT_RME          0x01
 199 #define  HSCX_STAT_RDO          0x10
 200 #define  HSCX_STAT_CRCVFRRAB    0x0E
 201 #define  HSCX_STAT_CRCVFR       0x06
 202 #define  HSCX_STAT_RML_MASK     0x3f00
 203
 204 /*
 205  * "HSCX" interrupt bits
 206  */
 207 #define  HSCX_INT_XPR           0x80
 208 #define  HSCX_INT_XDU           0x40
 209 #define  HSCX_INT_RPR           0x20
 210 #define  HSCX_INT_MASK          0xE0
 211
 212 /*
 213  * "HSCX" command bits
 214  */
 215 #define  HSCX_CMD_XRS           0x80
 216 #define  HSCX_CMD_XME           0x01
 217 #define  HSCX_CMD_RRS           0x20
 218 #define  HSCX_CMD_XML_MASK      0x3f00
 219
 220 /*
 221  * to prevent deactivating the "HSCX" when both channels are active we
 222  * define an HSCX_ACTIVE flag which is or'd into the channel's state
 223  * flag in avm_pnp_bchannel_setup upon active and cleared upon deactivation.
 224  * It is set high to allow room for new flags.
 225  */
 226 #define HSCX_AVMA1PP_ACTIVE     0x1000
 227
 228 /*---------------------------------------------------------------------------*
 229  *      AVM read fifo routines
 230  *---------------------------------------------------------------------------*/
 231
 232 static void
 233 avm_pnp_read_fifo(struct l1_softc *sc, int what, void *buf, size_t size)
 234 {
 235         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 236         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 237
 238         switch (what) {
 239                 case ISIC_WHAT_ISAC:
 240                         bus_space_write_1(btag, bhandle,  ADDR_REG_OFFSET, ISAC_FIFO);
 241                         bus_space_read_multi_1(btag, bhandle,  ISAC_REG_OFFSET, buf, size);
 242                         break;
 243                 case ISIC_WHAT_HSCXA:
 244                         hscx_read_fifo(0, buf, size, sc);
 245                         break;
 246                 case ISIC_WHAT_HSCXB:
 247                         hscx_read_fifo(1, buf, size, sc);
 248                         break;
 249         }
 250 }
 251
 252 static void
 253 hscx_read_fifo(int chan, void *buf, size_t len, struct l1_softc *sc)
 254 {
 255         u_int8_t *ip;
 256         size_t cnt;
 257         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 258         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 259
 260         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, chan);
 261         ip = (u_int8_t *)buf;
 262         cnt = 0;
 263         while (cnt++ < len)
 264         {
 265                 *ip++ = bus_space_read_1(btag, bhandle, ISAC_REG_OFFSET);
 266         }
 267 }
 268
 269 /*---------------------------------------------------------------------------*
 270  *      AVM write fifo routines
 271  *---------------------------------------------------------------------------*/
 272 static void
 273 avm_pnp_write_fifo(struct l1_softc *sc, int what, void *buf, size_t size)
 274 {
 275         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 276         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 277
 278         switch (what) {
 279                 case ISIC_WHAT_ISAC:
 280                         bus_space_write_1(btag, bhandle,  ADDR_REG_OFFSET, ISAC_FIFO);
 281                         bus_space_write_multi_1(btag, bhandle,  ISAC_REG_OFFSET, (u_int8_t*)buf, size);
 282                         break;
 283                 case ISIC_WHAT_HSCXA:
 284                         hscx_write_fifo(0, buf, size, sc);
 285                         break;
 286                 case ISIC_WHAT_HSCXB:
 287                         hscx_write_fifo(1, buf, size, sc);
 288                         break;
 289         }
 290 }
 291
 292 static void
 293 hscx_write_fifo(int chan, void *buf, size_t len, struct l1_softc *sc)
 294 {
 295         u_int8_t *ip;
 296         size_t cnt;
 297         l1_bchan_state_t *Bchan = &sc->sc_chan[chan];
 298         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 299         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 300
 301         sc->avma1pp_cmd &= ~HSCX_CMD_XME;
 302         sc->avma1pp_txl = 0;
 303
 304         if (Bchan->out_mbuf_cur == NULL)
 305         {
 306           if (Bchan->bprot != BPROT_NONE)
 307                  sc->avma1pp_cmd |= HSCX_CMD_XME;
 308         }
 309         if (len != sc->sc_bfifolen)
 310                 sc->avma1pp_txl = len;
 311
 312         hscx_write_reg(chan, HSCX_STAT, sc, 3);
 313
 314         ip = (u_int8_t *)buf;
 315         cnt = 0;
 316         while (cnt++ < len)
 317         {
 318                 bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET, *ip++);
 319         }
 320 }
 321
 322 /*---------------------------------------------------------------------------*
 323  *      AVM write register routines
 324  *---------------------------------------------------------------------------*/
 325
 326 static void
 327 avm_pnp_write_reg(struct l1_softc *sc, int what, bus_size_t offs, u_int8_t data)
 328 {
 329         u_char reg_bank;
 330         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 331         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 332
 333         switch (what) {
 334                 case ISIC_WHAT_ISAC:
 335                         reg_bank = (offs > MAX_LO_REG_OFFSET) ? ISAC_HI_REG_OFFSET:ISAC_LO_REG_OFFSET;
 336                         /* set the register bank */
 337                         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, reg_bank);
 338                         bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET + (offs & ISAC_REGSET_MASK), data);
 339                         break;
 340                 case ISIC_WHAT_HSCXA:
 341                         hscx_write_reg_val(0, offs, data, sc);
 342                         break;
 343                 case ISIC_WHAT_HSCXB:
 344                         hscx_write_reg_val(1, offs, data, sc);
 345                         break;
 346         }
 347 }
 348
 349 static void
 350 hscx_write_reg(int chan, u_int off, struct l1_softc *sc, u_int which)
 351 {
 352         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 353         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 354
 355         /* point at the correct channel */
 356         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, chan);
 357         if (which & 4)
 358                 bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET + off + 2, sc->avma1pp_prot);
 359         if (which & 2)
 360                 bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET + off + 1, sc->avma1pp_txl);
 361         if (which & 1)
 362                 bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET + off, sc->avma1pp_cmd);
 363 }
 364
 365 static void
 366 hscx_write_reg_val(int chan, u_int off, u_int8_t val, struct l1_softc *sc)
 367 {
 368         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 369         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 370
 371         /* point at the correct channel */
 372         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, chan);
 373         bus_space_write_1(btag, bhandle, ISAC_REG_OFFSET + off, val);
 374 }
 375
 376 /*---------------------------------------------------------------------------*
 377  *      AVM read register routines
 378  *---------------------------------------------------------------------------*/
 379 static u_int8_t
 380 avm_pnp_read_reg(struct l1_softc *sc, int what, bus_size_t offs)
 381 {
 382         u_char reg_bank;
 383         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 384         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 385
 386         switch (what) {
 387                 case ISIC_WHAT_ISAC:
 388                         reg_bank = (offs > MAX_LO_REG_OFFSET) ? ISAC_HI_REG_OFFSET:ISAC_LO_REG_OFFSET;
 389                         /* set the register bank */
 390                         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, reg_bank);
 391                         return(bus_space_read_1(btag, bhandle, ISAC_REG_OFFSET +
 392                                 (offs & ISAC_REGSET_MASK)));
 393                 case ISIC_WHAT_HSCXA:
 394                         return hscx_read_reg(0, offs, sc);
 395                 case ISIC_WHAT_HSCXB:
 396                         return hscx_read_reg(1, offs, sc);
 397         }
 398         return 0;
 399 }
 400
 401 static u_int
 402 hscx_read_reg(int chan, u_int off, struct l1_softc *sc)
 403 {
 404         bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 405         bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 406
 407         /* point at the correct channel */
 408         bus_space_write_1(btag, bhandle, ADDR_REG_OFFSET, chan);
 409         return(bus_space_read_1(btag, bhandle, ISAC_REG_OFFSET + off));
 410 }
 411
 412
 413 static struct ifpnp_ids {
 414         u_long vend_id;
 415         char *id_str;
 416 } ifpnp_ids[] = {
 417         { 0x0009cd06,           "AVM Fritz!Card PnP"            },
 418         { 0, 0 }
 419 };
 420
 421 /*---------------------------------------------------------------------------*
 422  *      avm_pnp_probe - probe for a card
 423  *---------------------------------------------------------------------------*/
 424 static int
 425 avm_pnp_probe(dev)
 426         device_t                dev;
 427 {
 428         struct ifpnp_ids *ids;                  /* pnp id's */
 429         char *string = NULL;                            /* the name */
 430         u_int32_t vend_id = isa_get_vendorid(dev);      /* vendor id */
 431
 432         /* search table of knowd id's */
 433
 434         for(ids = ifpnp_ids; ids->vend_id != 0; ids++)
 435         {
 436                 if(vend_id == ids->vend_id)
 437                 {
 438                         string = ids->id_str;
 439                         break;
 440                 }
 441         }
 442
 443         if(string)              /* set name if we have one */
 444         {
 445                 device_set_desc(dev, string);   /* set description */
 446                 return 0;
 447         }
 448         else
 449         {
 450                 return ENXIO;
 451         }
 452 }
 453
 454 /*---------------------------------------------------------------------------*
 455  *      avm_pnp_attach - attach Fritz!Card PnP
 456  *---------------------------------------------------------------------------*/
 457 int
 458 avm_pnp_attach(device_t dev)
 459 {
 460         struct l1_softc *sc;
 461         u_int v;
 462         int unit, error = 0;
 463         int s;
 464         u_int16_t vid;
 465         void *ih = 0;
 466         bus_space_handle_t bhandle;
 467         bus_space_tag_t btag;
 468
 469         s = splimp();
 470
 471         vid = isa_get_vendorid(dev);
 472         sc = device_get_softc(dev);
 473         unit = device_get_unit(dev);
 474         bzero(sc, sizeof(struct l1_softc));
 475
 476         /* probably not really required */
 477         if(unit > IFPNP_MAXUNIT) {
 478                 printf("avm_pnp%d: Error, unit > IFPNP_MAXUNIT!\n", unit);
 479                 splx(s);
 480                 return(ENXIO);
 481         }
 482
 483         ifpnp_scp[unit] = sc;
 484
 485
 486         /* get io_base */
 487         if(!(sc->sc_resources.io_base[0] =
 488                         bus_alloc_resource(dev, SYS_RES_IOPORT,
 489                                                 &sc->sc_resources.io_rid[0],
 490                                                 0UL, ~0UL, 1, RF_ACTIVE ) ))
 491         {
 492                 printf("avm_pnp_attach: Couldn't get my io_base.\n");
 493                 return ENXIO;
 494         }
 495         if (sc->sc_resources.io_base[0] == NULL) {
 496                 printf("avm_pnp%d: couldn't map IO port\n", unit);
 497                 error = ENXIO;
 498                 goto fail;
 499         }
 500
 501         bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 502         btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 503
 504         /* will not be used for pnp devices */
 505         sc->sc_port = rman_get_start(sc->sc_resources.io_base[0]);
 506
 507         /* get irq, release io_base if we don't get it */
 508
 509         if(!(sc->sc_resources.irq =
 510                         bus_alloc_resource(dev, SYS_RES_IRQ,
 511                                            &sc->sc_resources.irq_rid,
 512                                            0UL, ~0UL, 1, RF_ACTIVE)))
 513         {
 514                 printf("avm_pnp%d: Could not get irq.\n",unit);
 515                 error = ENXIO;
 516                 goto fail;
 517         }
 518
 519         /* not needed */
 520         sc->sc_irq = rman_get_start(sc->sc_resources.irq);
 521         bus_setup_intr(dev,sc->sc_resources.irq,INTR_TYPE_NET,
 522                                 (void(*)(void*))avm_pnp_intr, sc,&ih);
 523         sc->sc_unit = unit;
 524
 525         /* end of new-bus stuff */
 526
 527         ISAC_BASE = (caddr_t)ISIC_WHAT_ISAC;
 528
 529         HSCX_A_BASE = (caddr_t)ISIC_WHAT_HSCXA;
 530         HSCX_B_BASE = (caddr_t)ISIC_WHAT_HSCXB;
 531
 532         /* setup access routines */
 533
 534         sc->clearirq = NULL;
 535         sc->readreg = avm_pnp_read_reg;
 536         sc->writereg = avm_pnp_write_reg;
 537
 538         sc->readfifo = avm_pnp_read_fifo;
 539         sc->writefifo = avm_pnp_write_fifo;
 540
 541         /* setup card type */
 542
 543         sc->sc_cardtyp = CARD_TYPEP_AVM_PNP;
 544
 545         /* setup IOM bus type */
 546
 547         sc->sc_bustyp = BUS_TYPE_IOM2;
 548
 549         /* set up some other miscellaneous things */
 550         sc->sc_ipac = 0;
 551         sc->sc_bfifolen = HSCX_FIFO_LEN;
 552
 553         /* reset the card */
 554         /* the Linux driver does this to clear any pending ISAC interrupts */
 555         v = 0;
 556         v = ISAC_READ(I_STAR);
 557         v = ISAC_READ(I_MODE);
 558         v = ISAC_READ(I_ADF2);
 559         v = ISAC_READ(I_ISTA);
 560         if (v & ISAC_ISTA_EXI)
 561         {
 562                  v = ISAC_READ(I_EXIR);
 563         }
 564         v = ISAC_READ(I_CIRR);
 565         ISAC_WRITE(I_MASK, 0xff);
 566         /* the Linux driver does this to clear any pending HSCX interrupts */
 567         v = hscx_read_reg(0, HSCX_STAT, sc);
 568         v = hscx_read_reg(1, HSCX_STAT, sc);
 569
 570         bus_space_write_1(btag, bhandle, STAT0_OFFSET, ASL_RESET_ALL|ASL_TIMERDISABLE);
 571         DELAY(SEC_DELAY/100); /* 10 ms */
 572         bus_space_write_1(btag, bhandle, STAT1_OFFSET, ASL1_ENABLE_IOM|sc->sc_irq);
 573         DELAY(SEC_DELAY/100); /* 10 ms */
 574         bus_space_write_1(btag, bhandle, STAT0_OFFSET, ASL_TIMERRESET|ASL_ENABLE_INT|ASL_TIMERDISABLE);
 575         DELAY(SEC_DELAY/100); /* 10 ms */
 576
 577          printf("ifpnp%d: AVM Fritz!Card PnP Class %#x Revision %d \n", unit,
 578                         bus_space_read_1(btag, bhandle, CLASS_OFFSET),
 579                         bus_space_read_1(btag, bhandle, REVISION_OFFSET));
 580
 581          printf("ifpnp%d: ISAC %s (IOM-%c)\n", unit,
 582                 "2085 Version A1/A2 or 2086/2186 Version 1.1",
 583                  sc->sc_bustyp == BUS_TYPE_IOM1 ? '1' : '2');
 584
 585
 586         /* init the ISAC */
 587         ifpnp_isac_init(sc);
 588
 589         /* init the "HSCX" */
 590         avm_pnp_bchannel_setup(sc->sc_unit, HSCX_CH_A, BPROT_NONE, 0);
 591
 592         avm_pnp_bchannel_setup(sc->sc_unit, HSCX_CH_B, BPROT_NONE, 0);
 593
 594         /* can't use the normal B-Channel stuff */
 595         avm_pnp_init_linktab(sc);
 596
 597         /* set trace level */
 598
 599         sc->sc_trace = TRACE_OFF;
 600
 601         sc->sc_state = ISAC_IDLE;
 602
 603         sc->sc_ibuf = NULL;
 604         sc->sc_ib = NULL;
 605         sc->sc_ilen = 0;
 606
 607         sc->sc_obuf = NULL;
 608         sc->sc_op = NULL;
 609         sc->sc_ol = 0;
 610         sc->sc_freeflag = 0;
 611
 612         sc->sc_obuf2 = NULL;
 613         sc->sc_freeflag2 = 0;
 614
 615         callout_handle_init(&sc->sc_T3_callout);
 616         callout_handle_init(&sc->sc_T4_callout);
 617
 618         /* init higher protocol layers */
 619
 620         i4b_l1_mph_status_ind(L0IFPNPUNIT(sc->sc_unit), STI_ATTACH, sc->sc_cardtyp, &avm_pnp_l1mux_func);
 621
 622   fail:
 623         splx(s);
 624         return(error);
 625 }
 626
 627 /*
 628  * this is the real interrupt routine
 629  */
 630 static void
 631 avm_pnp_hscx_intr(int h_chan, u_int stat, u_int cnt, struct l1_softc *sc)
 632 {
 633         l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
 634         int activity = -1;
 635
 636         NDBGL1(L1_H_IRQ, "%#x", stat);
 637
 638         if((stat & HSCX_INT_XDU) && (chan->bprot != BPROT_NONE))/* xmit data underrun */
 639         {
 640                 chan->stat_XDU++;
 641                 NDBGL1(L1_H_XFRERR, "xmit data underrun");
 642                 /* abort the transmission */
 643                 sc->avma1pp_txl = 0;
 644                 sc->avma1pp_cmd |= HSCX_CMD_XRS;
 645                 hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
 646                 sc->avma1pp_cmd &= ~HSCX_CMD_XRS;
 647                 hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
 648
 649                 if (chan->out_mbuf_head != NULL)  /* don't continue to transmit this buffer */
 650                 {
 651                         i4b_Bfreembuf(chan->out_mbuf_head);
 652                         chan->out_mbuf_cur = chan->out_mbuf_head = NULL;
 653                 }
 654         }
 655
 656         /*
 657          * The following is based on examination of the Linux driver.
 658          *
 659          * The logic here is different than with a "real" HSCX; all kinds
 660          * of information (interrupt/status bits) are in stat.
 661          *              HSCX_INT_RPR indicates a receive interrupt
 662          *                      HSCX_STAT_RDO indicates an overrun condition, abort -
 663          *                      otherwise read the bytes ((stat & HSCX_STZT_RML_MASK) >> 8)
 664          *                      HSCX_STAT_RME indicates end-of-frame and apparently any
 665          *                      CRC/framing errors are only reported in this state.
 666          *                              if ((stat & HSCX_STAT_CRCVFRRAB) != HSCX_STAT_CRCVFR)
 667          *                                      CRC/framing error
 668          */
 669
 670         if(stat & HSCX_INT_RPR)
 671         {
 672                 int fifo_data_len;
 673                 int error = 0;
 674                 /* always have to read the FIFO, so use a scratch buffer */
 675                 u_char scrbuf[HSCX_FIFO_LEN];
 676
 677                 if(stat & HSCX_STAT_RDO)
 678                 {
 679                         chan->stat_RDO++;
 680                         NDBGL1(L1_H_XFRERR, "receive data overflow");
 681                         error++;
 682                 }
 683
 684                 /*
 685                  * check whether we're receiving data for an inactive B-channel
 686                  * and discard it. This appears to happen for telephony when
 687                  * both B-channels are active and one is deactivated. Since
 688                  * it is not really possible to deactivate the channel in that
 689                  * case (the ASIC seems to deactivate _both_ channels), the
 690                  * "deactivated" channel keeps receiving data which can lead
 691                  * to exhaustion of mbufs and a kernel panic.
 692                  *
 693                  * This is a hack, but it's the only solution I can think of
 694                  * without having the documentation for the ASIC.
 695                  * GJ - 28 Nov 1999
 696                  */
 697                  if (chan->state == HSCX_IDLE)
 698                  {
 699                         NDBGL1(L1_H_XFRERR, "toss data from %d", h_chan);
 700                         error++;
 701                  }
 702
 703                 fifo_data_len = cnt;
 704
 705                 if(fifo_data_len == 0)
 706                         fifo_data_len = sc->sc_bfifolen;
 707
 708                 /* ALWAYS read data from HSCX fifo */
 709
 710                 HSCX_RDFIFO(h_chan, scrbuf, fifo_data_len);
 711                 chan->rxcount += fifo_data_len;
 712
 713                 /* all error conditions checked, now decide and take action */
 714
 715                 if(error == 0)
 716                 {
 717                         if(chan->in_mbuf == NULL)
 718                         {
 719                                 if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
 720                                         panic("L1 avm_pnp_hscx_intr: RME, cannot allocate mbuf!\n");
 721                                 chan->in_cbptr = chan->in_mbuf->m_data;
 722                                 chan->in_len = 0;
 723                         }
 724
 725                         if((chan->in_len + fifo_data_len) <= BCH_MAX_DATALEN)
 726                         {
 727                                 /* OK to copy the data */
 728                                 bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
 729                                 chan->in_cbptr += fifo_data_len;
 730                                 chan->in_len += fifo_data_len;
 731
 732                                 /* setup mbuf data length */
 733
 734                                 chan->in_mbuf->m_len = chan->in_len;
 735                                 chan->in_mbuf->m_pkthdr.len = chan->in_len;
 736
 737                                 if(sc->sc_trace & TRACE_B_RX)
 738                                 {
 739                                         i4b_trace_hdr_t hdr;
 740                                         hdr.unit = L0IFPNPUNIT(sc->sc_unit);
 741                                         hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
 742                                         hdr.dir = FROM_NT;
 743                                         hdr.count = ++sc->sc_trace_bcount;
 744                                         MICROTIME(hdr.time);
 745                                         i4b_l1_trace_ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
 746                                 }
 747
 748                                 if (stat & HSCX_STAT_RME)
 749                                 {
 750                                   if((stat & HSCX_STAT_CRCVFRRAB) == HSCX_STAT_CRCVFR)
 751                                   {
 752                                          (*chan->isic_drvr_linktab->bch_rx_data_ready)(chan->isic_drvr_linktab->unit);
 753                                          activity = ACT_RX;
 754
 755                                          /* mark buffer ptr as unused */
 756
 757                                          chan->in_mbuf = NULL;
 758                                          chan->in_cbptr = NULL;
 759                                          chan->in_len = 0;
 760                                   }
 761                                   else
 762                                   {
 763                                                 chan->stat_CRC++;
 764                                                 NDBGL1(L1_H_XFRERR, "CRC/RAB");
 765                                           if (chan->in_mbuf != NULL)
 766                                           {
 767                                                   i4b_Bfreembuf(chan->in_mbuf);
 768                                                   chan->in_mbuf = NULL;
 769                                                   chan->in_cbptr = NULL;
 770                                                   chan->in_len = 0;
 771                                           }
 772                                   }
 773                                 }
 774                         } /* END enough space in mbuf */
 775                         else
 776                         {
 777                                  if(chan->bprot == BPROT_NONE)
 778                                  {
 779                                           /* setup mbuf data length */
 780
 781                                           chan->in_mbuf->m_len = chan->in_len;
 782                                           chan->in_mbuf->m_pkthdr.len = chan->in_len;
 783
 784                                           if(sc->sc_trace & TRACE_B_RX)
 785                                           {
 786                                                         i4b_trace_hdr_t hdr;
 787                                                         hdr.unit = L0IFPNPUNIT(sc->sc_unit);
 788                                                         hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
 789                                                         hdr.dir = FROM_NT;
 790                                                         hdr.count = ++sc->sc_trace_bcount;
 791                                                         MICROTIME(hdr.time);
 792                                                         i4b_l1_trace_ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
 793                                                 }
 794
 795                                           if(!(i4b_l1_bchan_tel_silence(chan->in_mbuf->m_data, chan->in_mbuf->m_len)))
 796                                                  activity = ACT_RX;
 797
 798                                           /* move rx'd data to rx queue */
 799 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 800                                           (void) IF_HANDOFF(&chan->rx_queue, chan->in_mbuf, NULL);
 801 #else
 802                                           if(!(IF_QFULL(&chan->rx_queue)))
 803                                           {
 804                                                 IF_ENQUEUE(&chan->rx_queue, chan->in_mbuf);
 805                                           }
 806                                           else
 807                                           {
 808                                                 i4b_Bfreembuf(chan->in_mbuf);
 809                                           }
 810 #endif
 811                                           /* signal upper layer that data are available */
 812                                           (*chan->isic_drvr_linktab->bch_rx_data_ready)(chan->isic_drvr_linktab->unit);
 813
 814                                           /* alloc new buffer */
 815
 816                                           if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
 817                                                  panic("L1 avm_pnp_hscx_intr: RPF, cannot allocate new mbuf!\n");
 818
 819                                           /* setup new data ptr */
 820
 821                                           chan->in_cbptr = chan->in_mbuf->m_data;
 822
 823                                           /* OK to copy the data */
 824                                           bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
 825
 826                                           chan->in_cbptr += fifo_data_len;
 827                                           chan->in_len = fifo_data_len;
 828
 829                                           chan->rxcount += fifo_data_len;
 830                                         }
 831                                  else
 832                                         {
 833                                           NDBGL1(L1_H_XFRERR, "RAWHDLC rx buffer overflow in RPF, in_len=%d", chan->in_len);
 834                                           chan->in_cbptr = chan->in_mbuf->m_data;
 835                                           chan->in_len = 0;
 836                                         }
 837                           }
 838                 } /* if(error == 0) */
 839                 else
 840                 {
 841                         /* land here for RDO */
 842                         if (chan->in_mbuf != NULL)
 843                         {
 844                                 i4b_Bfreembuf(chan->in_mbuf);
 845                                 chan->in_mbuf = NULL;
 846                                 chan->in_cbptr = NULL;
 847                                 chan->in_len = 0;
 848                         }
 849                         sc->avma1pp_txl = 0;
 850                         sc->avma1pp_cmd |= HSCX_CMD_RRS;
 851                         hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
 852                         sc->avma1pp_cmd &= ~HSCX_CMD_RRS;
 853                         hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
 854                 }
 855         }
 856
 857
 858         /* transmit fifo empty, new data can be written to fifo */
 859
 860         if(stat & HSCX_INT_XPR)
 861         {
 862                 /*
 863                  * for a description what is going on here, please have
 864                  * a look at isic_bchannel_start() in i4b_bchan.c !
 865                  */
 866
 867                 NDBGL1(L1_H_IRQ, "unit %d, chan %d - XPR, Tx Fifo Empty!", sc->sc_unit, h_chan);
 868
 869                 if(chan->out_mbuf_cur == NULL)  /* last frame is transmitted */
 870                 {
 871                         IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
 872
 873                         if(chan->out_mbuf_head == NULL)
 874                         {
 875                                 chan->state &= ~HSCX_TX_ACTIVE;
 876                                 (*chan->isic_drvr_linktab->bch_tx_queue_empty)(chan->isic_drvr_linktab->unit);
 877                         }
 878                         else
 879                         {
 880                                 chan->state |= HSCX_TX_ACTIVE;
 881                                 chan->out_mbuf_cur = chan->out_mbuf_head;
 882                                 chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
 883                                 chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
 884
 885                                 if(sc->sc_trace & TRACE_B_TX)
 886                                 {
 887                                         i4b_trace_hdr_t hdr;
 888                                         hdr.unit = L0IFPNPUNIT(sc->sc_unit);
 889                                         hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
 890                                         hdr.dir = FROM_TE;
 891                                         hdr.count = ++sc->sc_trace_bcount;
 892                                         MICROTIME(hdr.time);
 893                                         i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
 894                                 }
 895
 896                                 if(chan->bprot == BPROT_NONE)
 897                                 {
 898                                         if(!(i4b_l1_bchan_tel_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
 899                                                 activity = ACT_TX;
 900                                 }
 901                                 else
 902                                 {
 903                                         activity = ACT_TX;
 904                                 }
 905                         }
 906                 }
 907
 908                 avm_pnp_hscx_fifo(chan, sc);
 909         }
 910
 911         /* call timeout handling routine */
 912
 913         if(activity == ACT_RX || activity == ACT_TX)
 914                 (*chan->isic_drvr_linktab->bch_activity)(chan->isic_drvr_linktab->unit, activity);
 915 }
 916
 917 /*
 918  * this is the main routine which checks each channel and then calls
 919  * the real interrupt routine as appropriate
 920  */
 921 static void
 922 avm_pnp_hscx_int_handler(struct l1_softc *sc)
 923 {
 924         u_char stat = 0;
 925         u_char cnt = 0;
 926
 927         stat = hscx_read_reg(0, HSCX_STAT, sc);
 928         if (stat & HSCX_INT_RPR)
 929           cnt = hscx_read_reg(0, HSCX_STAT+1, sc);
 930         if (stat & HSCX_INT_MASK)
 931           avm_pnp_hscx_intr(0, stat, cnt, sc);
 932
 933         cnt = 0;
 934         stat = hscx_read_reg(1, HSCX_STAT, sc);
 935         if (stat & HSCX_INT_RPR)
 936           cnt = hscx_read_reg(1, HSCX_STAT+1, sc);
 937         if (stat & HSCX_INT_MASK)
 938           avm_pnp_hscx_intr(1, stat, cnt, sc);
 939 }
 940
 941 static void
 942 avm_pnp_intr(void *xsc)
 943 {
 944         u_char stat;
 945         struct l1_softc *sc;
 946         bus_space_handle_t bhandle;
 947         bus_space_tag_t btag;
 948
 949         sc = xsc;
 950         bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
 951         btag = rman_get_bustag(sc->sc_resources.io_base[0]);
 952
 953         stat = bus_space_read_1(btag, bhandle, STAT0_OFFSET);
 954         NDBGL1(L1_H_IRQ, "stat %x", stat);
 955         /* was there an interrupt from this card ? */
 956         if ((stat & ASL_IRQ_Pending) == ASL_IRQ_Pending)
 957                 return; /* no */
 958         /* interrupts are low active */
 959         if (!(stat & ASL_IRQ_TIMER))
 960           NDBGL1(L1_H_IRQ, "timer interrupt ???");
 961         if (!(stat & ASL_IRQ_HSCX))
 962         {
 963           NDBGL1(L1_H_IRQ, "HSCX");
 964                 avm_pnp_hscx_int_handler(sc);
 965         }
 966         if (!(stat & ASL_IRQ_ISAC))
 967         {
 968           NDBGL1(L1_H_IRQ, "ISAC");
 969                 ifpnp_isac_intr(sc);
 970         }
 971 }
 972
 973 static void
 974 avm_pnp_hscx_init(struct l1_softc *sc, int h_chan, int activate)
 975 {
 976         l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
 977
 978         NDBGL1(L1_BCHAN, "unit=%d, channel=%d, %s",
 979                 sc->sc_unit, h_chan, activate ? "activate" : "deactivate");
 980
 981         if (activate == 0)
 982         {
 983                 /* only deactivate if both channels are idle */
 984                 if (sc->sc_chan[HSCX_CH_A].state != HSCX_IDLE ||
 985                         sc->sc_chan[HSCX_CH_B].state != HSCX_IDLE)
 986                 {
 987                         return;
 988                 }
 989                 sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
 990                 sc->avma1pp_prot = HSCX_MODE_TRANS;
 991                 hscx_write_reg(h_chan, HSCX_STAT, sc, 5);
 992                 return;
 993         }
 994         if(chan->bprot == BPROT_RHDLC)
 995         {
 996                   NDBGL1(L1_BCHAN, "BPROT_RHDLC");
 997
 998                 /* HDLC Frames, transparent mode 0 */
 999                 sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
1000                 sc->avma1pp_prot = HSCX_MODE_ITF_FLG;
1001                 hscx_write_reg(h_chan, HSCX_STAT, sc, 5);
1002                 sc->avma1pp_cmd = HSCX_CMD_XRS;
1003                 hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
1004                 sc->avma1pp_cmd = 0;
1005         }
1006         else
1007         {
1008                   NDBGL1(L1_BCHAN, "BPROT_NONE??");
1009
1010                 /* Raw Telephony, extended transparent mode 1 */
1011                 sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
1012                 sc->avma1pp_prot = HSCX_MODE_TRANS;
1013                 hscx_write_reg(h_chan, HSCX_STAT, sc, 5);
1014                 sc->avma1pp_cmd = HSCX_CMD_XRS;
1015                 hscx_write_reg(h_chan, HSCX_STAT, sc, 1);
1016                 sc->avma1pp_cmd = 0;
1017         }
1018 }
1019
1020 static void
1021 avm_pnp_bchannel_setup(int unit, int h_chan, int bprot, int activate)
1022 {
1023         struct l1_softc *sc = ifpnp_scp[unit];
1024         l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
1025
1026         int s = SPLI4B();
1027
1028         if(activate == 0)
1029         {
1030                 /* deactivation */
1031                 chan->state = HSCX_IDLE;
1032                 avm_pnp_hscx_init(sc, h_chan, activate);
1033         }
1034
1035         NDBGL1(L1_BCHAN, "unit=%d, channel=%d, %s",
1036                 sc->sc_unit, h_chan, activate ? "activate" : "deactivate");
1037
1038         /* general part */
1039
1040         chan->unit = sc->sc_unit;       /* unit number */
1041         chan->channel = h_chan;         /* B channel */
1042         chan->bprot = bprot;            /* B channel protocol */
1043         chan->state = HSCX_IDLE;        /* B channel state */
1044
1045         /* receiver part */
1046
1047         chan->rx_queue.ifq_maxlen = IFQ_MAXLEN;
1048
1049 #if defined (__FreeBSD__) && __FreeBSD__ > 4
1050         mtx_init(&chan->rx_queue.ifq_mtx, "i4b_avm_pnp_rx", MTX_DEF);
1051 #endif
1052
1053         i4b_Bcleanifq(&chan->rx_queue); /* clean rx queue */
1054
1055         chan->rxcount = 0;              /* reset rx counter */
1056
1057         i4b_Bfreembuf(chan->in_mbuf);   /* clean rx mbuf */
1058
1059         chan->in_mbuf = NULL;           /* reset mbuf ptr */
1060         chan->in_cbptr = NULL;          /* reset mbuf curr ptr */
1061         chan->in_len = 0;               /* reset mbuf data len */
1062
1063         /* transmitter part */
1064
1065         chan->tx_queue.ifq_maxlen = IFQ_MAXLEN;
1066
1067 #if defined (__FreeBSD__) && __FreeBSD__ > 4
1068         mtx_init(&chan->tx_queue.ifq_mtx, "i4b_avm_pnp_tx", MTX_DEF);
1069 #endif
1070         i4b_Bcleanifq(&chan->tx_queue); /* clean tx queue */
1071
1072         chan->txcount = 0;              /* reset tx counter */
1073
1074         i4b_Bfreembuf(chan->out_mbuf_head);     /* clean tx mbuf */
1075
1076         chan->out_mbuf_head = NULL;     /* reset head mbuf ptr */
1077         chan->out_mbuf_cur = NULL;      /* reset current mbuf ptr */
1078         chan->out_mbuf_cur_ptr = NULL;  /* reset current mbuf data ptr */
1079         chan->out_mbuf_cur_len = 0;     /* reset current mbuf data cnt */
1080
1081         if(activate != 0)
1082         {
1083                 /* activation */
1084                 avm_pnp_hscx_init(sc, h_chan, activate);
1085                 chan->state |= HSCX_AVMA1PP_ACTIVE;
1086         }
1087
1088         splx(s);
1089 }
1090
1091 static void
1092 avm_pnp_bchannel_start(int unit, int h_chan)
1093 {
1094         struct l1_softc *sc = ifpnp_scp[unit];
1095         l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
1096         int s;
1097         int activity = -1;
1098
1099         s = SPLI4B();                           /* enter critical section */
1100         if(chan->state & HSCX_TX_ACTIVE)        /* already running ? */
1101         {
1102                 splx(s);
1103                 return;                         /* yes, leave */
1104         }
1105
1106         /* get next mbuf from queue */
1107
1108         IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
1109
1110         if(chan->out_mbuf_head == NULL)         /* queue empty ? */
1111         {
1112                 splx(s);                        /* leave critical section */
1113                 return;                         /* yes, exit */
1114         }
1115
1116         /* init current mbuf values */
1117
1118         chan->out_mbuf_cur = chan->out_mbuf_head;
1119         chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
1120         chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
1121
1122         /* activity indicator for timeout handling */
1123
1124         if(chan->bprot == BPROT_NONE)
1125         {
1126                 if(!(i4b_l1_bchan_tel_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
1127                         activity = ACT_TX;
1128         }
1129         else
1130         {
1131                 activity = ACT_TX;
1132         }
1133
1134         chan->state |= HSCX_TX_ACTIVE;          /* we start transmitting */
1135
1136         if(sc->sc_trace & TRACE_B_TX)   /* if trace, send mbuf to trace dev */
1137         {
1138                 i4b_trace_hdr_t hdr;
1139                 hdr.unit = L0IFPNPUNIT(sc->sc_unit);
1140                 hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
1141                 hdr.dir = FROM_TE;
1142                 hdr.count = ++sc->sc_trace_bcount;
1143                 MICROTIME(hdr.time);
1144                 i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
1145         }
1146
1147         avm_pnp_hscx_fifo(chan, sc);
1148
1149         /* call timeout handling routine */
1150
1151         if(activity == ACT_RX || activity == ACT_TX)
1152                 (*chan->isic_drvr_linktab->bch_activity)(chan->isic_drvr_linktab->unit, activity);
1153
1154         splx(s);
1155 }
1156
1157 /*---------------------------------------------------------------------------*
1158  *      return the address of isic drivers linktab
1159  *---------------------------------------------------------------------------*/
1160 static isdn_link_t *
1161 avm_pnp_ret_linktab(int unit, int channel)
1162 {
1163         struct l1_softc *sc = ifpnp_scp[unit];
1164         l1_bchan_state_t *chan = &sc->sc_chan[channel];
1165
1166         return(&chan->isic_isdn_linktab);
1167 }
1168
1169 /*---------------------------------------------------------------------------*
1170  *      set the driver linktab in the b channel softc
1171  *---------------------------------------------------------------------------*/
1172 static void
1173 avm_pnp_set_linktab(int unit, int channel, drvr_link_t *dlt)
1174 {
1175         struct l1_softc *sc = ifpnp_scp[unit];
1176         l1_bchan_state_t *chan = &sc->sc_chan[channel];
1177
1178         chan->isic_drvr_linktab = dlt;
1179 }
1180
1181
1182 /*---------------------------------------------------------------------------*
1183  *      initialize our local linktab
1184  *---------------------------------------------------------------------------*/
1185 static void
1186 avm_pnp_init_linktab(struct l1_softc *sc)
1187 {
1188         l1_bchan_state_t *chan = &sc->sc_chan[HSCX_CH_A];
1189         isdn_link_t *lt = &chan->isic_isdn_linktab;
1190
1191         /* make sure the hardware driver is known to layer 4 */
1192         /* avoid overwriting if already set */
1193         if (ctrl_types[CTRL_PASSIVE].set_linktab == NULL)
1194         {
1195                 ctrl_types[CTRL_PASSIVE].set_linktab = avm_pnp_set_linktab;
1196                 ctrl_types[CTRL_PASSIVE].get_linktab = avm_pnp_ret_linktab;
1197         }
1198
1199         /* local setup */
1200         lt->unit = sc->sc_unit;
1201         lt->channel = HSCX_CH_A;
1202         lt->bch_config = avm_pnp_bchannel_setup;
1203         lt->bch_tx_start = avm_pnp_bchannel_start;
1204         lt->bch_stat = avm_pnp_bchannel_stat;
1205         lt->tx_queue = &chan->tx_queue;
1206
1207         /* used by non-HDLC data transfers, i.e. telephony drivers */
1208         lt->rx_queue = &chan->rx_queue;
1209
1210         /* used by HDLC data transfers, i.e. ipr and isp drivers */
1211         lt->rx_mbuf = &chan->in_mbuf;
1212
1213         chan = &sc->sc_chan[HSCX_CH_B];
1214         lt = &chan->isic_isdn_linktab;
1215
1216         lt->unit = sc->sc_unit;
1217         lt->channel = HSCX_CH_B;
1218         lt->bch_config = avm_pnp_bchannel_setup;
1219         lt->bch_tx_start = avm_pnp_bchannel_start;
1220         lt->bch_stat = avm_pnp_bchannel_stat;
1221         lt->tx_queue = &chan->tx_queue;
1222
1223         /* used by non-HDLC data transfers, i.e. telephony drivers */
1224         lt->rx_queue = &chan->rx_queue;
1225
1226         /* used by HDLC data transfers, i.e. ipr and isp drivers */
1227         lt->rx_mbuf = &chan->in_mbuf;
1228 }
1229
1230 /*
1231  * use this instead of isic_bchannel_stat in i4b_bchan.c because it's static
1232  */
1233 static void
1234 avm_pnp_bchannel_stat(int unit, int h_chan, bchan_statistics_t *bsp)
1235 {
1236         struct l1_softc *sc = ifpnp_scp[unit];
1237         l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
1238         int s;
1239
1240         s = SPLI4B();
1241
1242         bsp->outbytes = chan->txcount;
1243         bsp->inbytes = chan->rxcount;
1244
1245         chan->txcount = 0;
1246         chan->rxcount = 0;
1247
1248         splx(s);
1249 }
1250
1251 /*---------------------------------------------------------------------------*
1252  *      fill HSCX fifo with data from the current mbuf
1253  *      Put this here until it can go into i4b_hscx.c
1254  *---------------------------------------------------------------------------*/
1255 static int
1256 avm_pnp_hscx_fifo(l1_bchan_state_t *chan, struct l1_softc *sc)
1257 {
1258         int len;
1259         int nextlen;
1260         int i;
1261         int cmd = 0;
1262         /* using a scratch buffer simplifies writing to the FIFO */
1263         u_char scrbuf[HSCX_FIFO_LEN];
1264
1265         len = 0;
1266
1267         /*
1268          * fill the HSCX tx fifo with data from the current mbuf. if
1269          * current mbuf holds less data than HSCX fifo length, try to
1270          * get the next mbuf from (a possible) mbuf chain. if there is
1271          * not enough data in a single mbuf or in a chain, then this
1272          * is the last mbuf and we tell the HSCX that it has to send
1273          * CRC and closing flag
1274          */
1275
1276         while(chan->out_mbuf_cur && len != sc->sc_bfifolen)
1277         {
1278                 nextlen = min(chan->out_mbuf_cur_len, sc->sc_bfifolen - len);
1279
1280 #ifdef NOTDEF
1281                 printf("i:mh=%p, mc=%p, mcp=%p, mcl=%d l=%d nl=%d # ",
1282                         chan->out_mbuf_head,
1283                         chan->out_mbuf_cur,
1284                         chan->out_mbuf_cur_ptr,
1285                         chan->out_mbuf_cur_len,
1286                         len,
1287                         nextlen);
1288 #endif
1289
1290                 cmd |= HSCX_CMDR_XTF;
1291                 /* collect the data in the scratch buffer */
1292                 for (i = 0; i < nextlen; i++)
1293                         scrbuf[i + len] = chan->out_mbuf_cur_ptr[i];
1294
1295                 len += nextlen;
1296                 chan->txcount += nextlen;
1297
1298                 chan->out_mbuf_cur_ptr += nextlen;
1299                 chan->out_mbuf_cur_len -= nextlen;
1300
1301                 if(chan->out_mbuf_cur_len == 0)
1302                 {
1303                         if((chan->out_mbuf_cur = chan->out_mbuf_cur->m_next) != NULL)
1304                         {
1305                                 chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
1306                                 chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
1307
1308                                 if(sc->sc_trace & TRACE_B_TX)
1309                                 {
1310                                         i4b_trace_hdr_t hdr;
1311                                         hdr.unit = L0IFPNPUNIT(sc->sc_unit);
1312                                         hdr.type = (chan->channel == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
1313                                         hdr.dir = FROM_TE;
1314                                         hdr.count = ++sc->sc_trace_bcount;
1315                                         MICROTIME(hdr.time);
1316                                         i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
1317                                 }
1318                         }
1319                         else
1320                         {
1321                                 if (chan->bprot != BPROT_NONE)
1322                                         cmd |= HSCX_CMDR_XME;
1323                                 i4b_Bfreembuf(chan->out_mbuf_head);
1324                                 chan->out_mbuf_head = NULL;
1325                         }
1326                 }
1327         }
1328         /* write what we have from the scratch buf to the HSCX fifo */
1329         if (len != 0)
1330                 HSCX_WRFIFO(chan->channel, scrbuf, len);
1331         return(cmd);
1332 }
1333
1334 /*---------------------------------------------------------------------------*
1335  *      ifpnp - ISAC interrupt routine
1336  *---------------------------------------------------------------------------*/
1337 static void
1338 ifpnp_isac_intr(struct l1_softc *sc)
1339 {
1340         u_char isac_irq_stat;
1341
1342         for(;;)
1343         {
1344                 /* get isac irq status */
1345                 isac_irq_stat = ISAC_READ(I_ISTA);
1346
1347                 if(isac_irq_stat)
1348                         ifpnp_isac_irq(sc, isac_irq_stat); /* isac handler */
1349                 else
1350                         break;
1351         }
1352
1353         ISAC_WRITE(I_MASK, 0xff);
1354
1355         DELAY(100);
1356
1357         ISAC_WRITE(I_MASK, ISAC_IMASK);
1358 }
1359
1360 /*---------------------------------------------------------------------------*
1361  *      ifpnp_recover - try to recover from irq lockup
1362  *---------------------------------------------------------------------------*/
1363 void
1364 ifpnp_recover(struct l1_softc *sc)
1365 {
1366         u_char byte;
1367
1368         /* get isac irq status */
1369
1370         byte = ISAC_READ(I_ISTA);
1371
1372         NDBGL1(L1_ERROR, "  ISAC: ISTA = 0x%x", byte);
1373
1374         if(byte & ISAC_ISTA_EXI)
1375                 NDBGL1(L1_ERROR, "  ISAC: EXIR = 0x%x", (u_char)ISAC_READ(I_EXIR));
1376
1377         if(byte & ISAC_ISTA_CISQ)
1378         {
1379                 byte = ISAC_READ(I_CIRR);
1380
1381                 NDBGL1(L1_ERROR, "  ISAC: CISQ = 0x%x", byte);
1382
1383                 if(byte & ISAC_CIRR_SQC)
1384                         NDBGL1(L1_ERROR, "  ISAC: SQRR = 0x%x", (u_char)ISAC_READ(I_SQRR));
1385         }
1386
1387         NDBGL1(L1_ERROR, "  ISAC: IMASK = 0x%x", ISAC_IMASK);
1388
1389         ISAC_WRITE(I_MASK, 0xff);
1390         DELAY(100);
1391         ISAC_WRITE(I_MASK, ISAC_IMASK);
1392 }
1393
1394 #endif /* NIFPNP > 0 */