drivers/isdn/hisax/st5481_d.c

   1 /*
   2  * Driver for ST5481 USB ISDN modem
   3  *
   4  * Author       Frode Isaksen
   5  * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
   6  *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/usb.h>
  15 #include <linux/slab.h>
  16 #include <linux/netdevice.h>
  17 #include "st5481.h"
  18
  19 static void ph_connect(struct st5481_adapter *adapter);
  20 static void ph_disconnect(struct st5481_adapter *adapter);
  21
  22 static struct Fsm l1fsm;
  23
  24 static char *strL1State[] =
  25 {
  26         "ST_L1_F3",
  27         "ST_L1_F4",
  28         "ST_L1_F6",
  29         "ST_L1_F7",
  30         "ST_L1_F8",
  31 };
  32
  33 static char *strL1Event[] =
  34 {
  35         "EV_IND_DP",
  36         "EV_IND_1",
  37         "EV_IND_2",
  38         "EV_IND_3",
  39         "EV_IND_RSY",
  40         "EV_IND_5",
  41         "EV_IND_6",
  42         "EV_IND_7",
  43         "EV_IND_AP",
  44         "EV_IND_9",
  45         "EV_IND_10",
  46         "EV_IND_11",
  47         "EV_IND_AI8",
  48         "EV_IND_AI10",
  49         "EV_IND_AIL",
  50         "EV_IND_DI",
  51         "EV_PH_ACTIVATE_REQ",
  52         "EV_PH_DEACTIVATE_REQ",
  53         "EV_TIMER3",
  54 };
  55
  56 static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg)
  57 {
  58         struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if;
  59
  60         ifc->l1l2(ifc, pr, arg);
  61 }
  62
  63 static void
  64 l1_go_f3(struct FsmInst *fi, int event, void *arg)
  65 {
  66         struct st5481_adapter *adapter = fi->userdata;
  67
  68         if (fi->state == ST_L1_F7)
  69                 ph_disconnect(adapter);
  70
  71         FsmChangeState(fi, ST_L1_F3);
  72         D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
  73 }
  74
  75 static void
  76 l1_go_f6(struct FsmInst *fi, int event, void *arg)
  77 {
  78         struct st5481_adapter *adapter = fi->userdata;
  79
  80         if (fi->state == ST_L1_F7)
  81                 ph_disconnect(adapter);
  82
  83         FsmChangeState(fi, ST_L1_F6);
  84 }
  85
  86 static void
  87 l1_go_f7(struct FsmInst *fi, int event, void *arg)
  88 {
  89         struct st5481_adapter *adapter = fi->userdata;
  90
  91         FsmDelTimer(&adapter->timer, 0);
  92         ph_connect(adapter);
  93         FsmChangeState(fi, ST_L1_F7);
  94         D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL);
  95 }
  96
  97 static void
  98 l1_go_f8(struct FsmInst *fi, int event, void *arg)
  99 {
 100         struct st5481_adapter *adapter = fi->userdata;
 101
 102         if (fi->state == ST_L1_F7)
 103                 ph_disconnect(adapter);
 104
 105         FsmChangeState(fi, ST_L1_F8);
 106 }
 107
 108 static void
 109 l1_timer3(struct FsmInst *fi, int event, void *arg)
 110 {
 111         struct st5481_adapter *adapter = fi->userdata;
 112
 113         st5481_ph_command(adapter, ST5481_CMD_DR);
 114         FsmChangeState(fi, ST_L1_F3);
 115         D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
 116 }
 117
 118 static void
 119 l1_ignore(struct FsmInst *fi, int event, void *arg)
 120 {
 121 }
 122
 123 static void
 124 l1_activate(struct FsmInst *fi, int event, void *arg)
 125 {
 126         struct st5481_adapter *adapter = fi->userdata;
 127
 128         st5481_ph_command(adapter, ST5481_CMD_DR);
 129         st5481_ph_command(adapter, ST5481_CMD_PUP);
 130         FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
 131         st5481_ph_command(adapter, ST5481_CMD_AR8);
 132         FsmChangeState(fi, ST_L1_F4);
 133 }
 134
 135 static struct FsmNode L1FnList[] __initdata =
 136 {
 137         {ST_L1_F3, EV_IND_DP,            l1_ignore},
 138         {ST_L1_F3, EV_IND_AP,            l1_go_f6},
 139         {ST_L1_F3, EV_IND_AI8,           l1_go_f7},
 140         {ST_L1_F3, EV_IND_AI10,          l1_go_f7},
 141         {ST_L1_F3, EV_PH_ACTIVATE_REQ,   l1_activate},
 142
 143         {ST_L1_F4, EV_TIMER3,            l1_timer3},
 144         {ST_L1_F4, EV_IND_DP,            l1_go_f3},
 145         {ST_L1_F4, EV_IND_AP,            l1_go_f6},
 146         {ST_L1_F4, EV_IND_AI8,           l1_go_f7},
 147         {ST_L1_F4, EV_IND_AI10,          l1_go_f7},
 148
 149         {ST_L1_F6, EV_TIMER3,            l1_timer3},
 150         {ST_L1_F6, EV_IND_DP,            l1_go_f3},
 151         {ST_L1_F6, EV_IND_AP,            l1_ignore},
 152         {ST_L1_F6, EV_IND_AI8,           l1_go_f7},
 153         {ST_L1_F6, EV_IND_AI10,          l1_go_f7},
 154         {ST_L1_F7, EV_IND_RSY,           l1_go_f8},
 155
 156         {ST_L1_F7, EV_IND_DP,            l1_go_f3},
 157         {ST_L1_F7, EV_IND_AP,            l1_go_f6},
 158         {ST_L1_F7, EV_IND_AI8,           l1_ignore},
 159         {ST_L1_F7, EV_IND_AI10,          l1_ignore},
 160         {ST_L1_F7, EV_IND_RSY,           l1_go_f8},
 161
 162         {ST_L1_F8, EV_TIMER3,            l1_timer3},
 163         {ST_L1_F8, EV_IND_DP,            l1_go_f3},
 164         {ST_L1_F8, EV_IND_AP,            l1_go_f6},
 165         {ST_L1_F8, EV_IND_AI8,           l1_go_f8},
 166         {ST_L1_F8, EV_IND_AI10,          l1_go_f8},
 167         {ST_L1_F8, EV_IND_RSY,           l1_ignore},
 168 };
 169
 170 static void l1m_debug(struct FsmInst *fi, char *fmt, ...)
 171 {
 172         va_list args;
 173         char buf[256];
 174
 175         va_start(args, fmt);
 176         vsnprintf(buf, sizeof(buf), fmt, args);
 177         DBG(8, "%s", buf);
 178         va_end(args);
 179 }
 180
 181 /* ======================================================================
 182  * D-Channel out
 183  */
 184
 185 /*
 186   D OUT state machine:
 187   ====================
 188
 189   Transmit short frame (< 16 bytes of encoded data):
 190
 191   L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
 192   --------    -----------           ---                  ---------
 193
 194               FIXME
 195
 196  -> [xx..xx]  SHORT_INIT            -> [7Exx..xxC1C27EFF]
 197               SHORT_WAIT_DEN        <> OUT_D_COUNTER=16
 198
 199               END_OF_SHORT          <- DEN_EVENT         -> 7Exx
 200                                                           xxxx
 201                                                           xxxx
 202                                                           xxxx
 203                                                           xxxx
 204                                                           xxxx
 205                                                           C1C1
 206                                                           7EFF
 207               WAIT_FOR_RESET_IDLE   <- D_UNDERRUN        <- (8ms)
 208               IDLE                  <> Reset pipe
 209
 210
 211
 212   Transmit long frame (>= 16 bytes of encoded data):
 213
 214   L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
 215   --------    -----------           ---                  ---------
 216
 217  -> [xx...xx] IDLE
 218               WAIT_FOR_STOP         <> OUT_D_COUNTER=0
 219               WAIT_FOR_RESET        <> Reset pipe
 220               STOP
 221               INIT_LONG_FRAME       -> [7Exx..xx]
 222               WAIT_DEN              <> OUT_D_COUNTER=16
 223               OUT_NORMAL            <- DEN_EVENT       -> 7Exx
 224               END_OF_FRAME_BUSY     -> [xxxx]             xxxx
 225               END_OF_FRAME_NOT_BUSY -> [xxxx]             xxxx
 226                                     -> [xxxx]             xxxx
 227                                     -> [C1C2]             xxxx
 228                                     -> [7EFF]             xxxx
 229                                                           xxxx
 230                                                           xxxx
 231                                                           ....
 232                                                           xxxx
 233                                                           C1C2
 234                                                           7EFF
 235                                     <- D_UNDERRUN      <- (> 8ms)
 236               WAIT_FOR_STOP         <> OUT_D_COUNTER=0
 237               WAIT_FOR_RESET        <> Reset pipe
 238               STOP
 239
 240 */
 241
 242 static struct Fsm dout_fsm;
 243
 244 static char *strDoutState[] =
 245 {
 246         "ST_DOUT_NONE",
 247
 248         "ST_DOUT_SHORT_INIT",
 249         "ST_DOUT_SHORT_WAIT_DEN",
 250
 251         "ST_DOUT_LONG_INIT",
 252         "ST_DOUT_LONG_WAIT_DEN",
 253         "ST_DOUT_NORMAL",
 254
 255         "ST_DOUT_WAIT_FOR_UNDERRUN",
 256         "ST_DOUT_WAIT_FOR_NOT_BUSY",
 257         "ST_DOUT_WAIT_FOR_STOP",
 258         "ST_DOUT_WAIT_FOR_RESET",
 259 };
 260
 261 static char *strDoutEvent[] =
 262 {
 263         "EV_DOUT_START_XMIT",
 264         "EV_DOUT_COMPLETE",
 265         "EV_DOUT_DEN",
 266         "EV_DOUT_RESETED",
 267         "EV_DOUT_STOPPED",
 268         "EV_DOUT_COLL",
 269         "EV_DOUT_UNDERRUN",
 270 };
 271
 272 static void dout_debug(struct FsmInst *fi, char *fmt, ...)
 273 {
 274         va_list args;
 275         char buf[256];
 276
 277         va_start(args, fmt);
 278         vsnprintf(buf, sizeof(buf), fmt, args);
 279         DBG(0x2, "%s", buf);
 280         va_end(args);
 281 }
 282
 283 static void dout_stop_event(void *context)
 284 {
 285         struct st5481_adapter *adapter = context;
 286
 287         FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL);
 288 }
 289
 290 /*
 291  * Start the transfer of a D channel frame.
 292  */
 293 static void usb_d_out(struct st5481_adapter *adapter, int buf_nr)
 294 {
 295         struct st5481_d_out *d_out = &adapter->d_out;
 296         struct urb *urb;
 297         unsigned int num_packets, packet_offset;
 298         int len, buf_size, bytes_sent;
 299         struct sk_buff *skb;
 300         struct usb_iso_packet_descriptor *desc;
 301
 302         if (d_out->fsm.state != ST_DOUT_NORMAL)
 303                 return;
 304
 305         if (test_and_set_bit(buf_nr, &d_out->busy)) {
 306                 DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
 307                 return;
 308         }
 309         urb = d_out->urb[buf_nr];
 310
 311         skb = d_out->tx_skb;
 312
 313         buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT;
 314
 315         if (skb) {
 316                 len = isdnhdlc_encode(&d_out->hdlc_state,
 317                                       skb->data, skb->len, &bytes_sent,
 318                                       urb->transfer_buffer, buf_size);
 319                 skb_pull(skb,bytes_sent);
 320         } else {
 321                 // Send flags or idle
 322                 len = isdnhdlc_encode(&d_out->hdlc_state,
 323                                       NULL, 0, &bytes_sent,
 324                                       urb->transfer_buffer, buf_size);
 325         }
 326
 327         if (len < buf_size) {
 328                 FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
 329         }
 330         if (skb && !skb->len) {
 331                 d_out->tx_skb = NULL;
 332                 D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
 333                 dev_kfree_skb_any(skb);
 334         }
 335
 336         // Prepare the URB
 337         urb->transfer_buffer_length = len;
 338         num_packets = 0;
 339         packet_offset = 0;
 340         while (packet_offset < len) {
 341                 desc = &urb->iso_frame_desc[num_packets];
 342                 desc->offset = packet_offset;
 343                 desc->length = SIZE_ISO_PACKETS_D_OUT;
 344                 if (len - packet_offset < desc->length)
 345                         desc->length = len - packet_offset;
 346                 num_packets++;
 347                 packet_offset += desc->length;
 348         }
 349         urb->number_of_packets = num_packets;
 350
 351         // Prepare the URB
 352         urb->dev = adapter->usb_dev;
 353         // Need to transmit the next buffer 2ms after the DEN_EVENT
 354         urb->transfer_flags = 0;
 355         urb->start_frame = usb_get_current_frame_number(adapter->usb_dev)+2;
 356
 357         DBG_ISO_PACKET(0x20,urb);
 358
 359         if (usb_submit_urb(urb, GFP_KERNEL) < 0) {
 360                 // There is another URB queued up
 361                 urb->transfer_flags = URB_ISO_ASAP;
 362                 SUBMIT_URB(urb, GFP_KERNEL);
 363         }
 364 }
 365
 366 static void fifo_reseted(void *context)
 367 {
 368         struct st5481_adapter *adapter = context;
 369
 370         FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL);
 371 }
 372
 373 static void usb_d_out_complete(struct urb *urb)
 374 {
 375         struct st5481_adapter *adapter = urb->context;
 376         struct st5481_d_out *d_out = &adapter->d_out;
 377         long buf_nr;
 378
 379         DBG(2, "");
 380
 381         buf_nr = get_buf_nr(d_out->urb, urb);
 382         test_and_clear_bit(buf_nr, &d_out->busy);
 383
 384         if (unlikely(urb->status < 0)) {
 385                 switch (urb->status) {
 386                         case -ENOENT:
 387                         case -ESHUTDOWN:
 388                         case -ECONNRESET:
 389                                 DBG(1,"urb killed status %d", urb->status);
 390                                 break;
 391                         default:
 392                                 WARN("urb status %d",urb->status);
 393                                 if (d_out->busy == 0) {
 394                                         st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
 395                                 }
 396                                 break;
 397                 }
 398                 return; // Give up
 399         }
 400
 401         FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr);
 402 }
 403
 404 /* ====================================================================== */
 405
 406 static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg)
 407 {
 408         // FIXME unify?
 409         struct st5481_adapter *adapter = fsm->userdata;
 410         struct st5481_d_out *d_out = &adapter->d_out;
 411         struct urb *urb;
 412         int len, bytes_sent;
 413         struct sk_buff *skb;
 414         int buf_nr = 0;
 415
 416         skb = d_out->tx_skb;
 417
 418         DBG(2,"len=%d",skb->len);
 419
 420         isdnhdlc_out_init(&d_out->hdlc_state, 1, 0);
 421
 422         if (test_and_set_bit(buf_nr, &d_out->busy)) {
 423                 WARN("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
 424                 return;
 425         }
 426         urb = d_out->urb[buf_nr];
 427
 428         DBG_SKB(0x10, skb);
 429         len = isdnhdlc_encode(&d_out->hdlc_state,
 430                               skb->data, skb->len, &bytes_sent,
 431                               urb->transfer_buffer, 16);
 432         skb_pull(skb, bytes_sent);
 433
 434         if(len < 16)
 435                 FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT);
 436         else
 437                 FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT);
 438
 439         if (skb->len == 0) {
 440                 d_out->tx_skb = NULL;
 441                 D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
 442                 dev_kfree_skb_any(skb);
 443         }
 444
 445 // Prepare the URB
 446         urb->transfer_buffer_length = len;
 447
 448         urb->iso_frame_desc[0].offset = 0;
 449         urb->iso_frame_desc[0].length = len;
 450         urb->number_of_packets = 1;
 451
 452         // Prepare the URB
 453         urb->dev = adapter->usb_dev;
 454         urb->transfer_flags = URB_ISO_ASAP;
 455
 456         DBG_ISO_PACKET(0x20,urb);
 457         SUBMIT_URB(urb, GFP_KERNEL);
 458 }
 459
 460 static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg)
 461 {
 462         struct st5481_adapter *adapter = fsm->userdata;
 463         struct st5481_d_out *d_out = &adapter->d_out;
 464
 465         FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN);
 466         st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
 467 }
 468
 469 static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg)
 470 {
 471         struct st5481_adapter *adapter = fsm->userdata;
 472         struct st5481_d_out *d_out = &adapter->d_out;
 473
 474         FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
 475 }
 476
 477 static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg)
 478 {
 479         struct st5481_adapter *adapter = fsm->userdata;
 480         struct st5481_d_out *d_out = &adapter->d_out;
 481
 482         st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
 483         FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN);
 484 }
 485
 486 static void dout_long_den(struct FsmInst *fsm, int event, void *arg)
 487 {
 488         struct st5481_adapter *adapter = fsm->userdata;
 489         struct st5481_d_out *d_out = &adapter->d_out;
 490
 491         FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL);
 492         usb_d_out(adapter, 0);
 493         usb_d_out(adapter, 1);
 494 }
 495
 496 static void dout_reset(struct FsmInst *fsm, int event, void *arg)
 497 {
 498         struct st5481_adapter *adapter = fsm->userdata;
 499         struct st5481_d_out *d_out = &adapter->d_out;
 500
 501         FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET);
 502         st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
 503 }
 504
 505 static void dout_stop(struct FsmInst *fsm, int event, void *arg)
 506 {
 507         struct st5481_adapter *adapter = fsm->userdata;
 508         struct st5481_d_out *d_out = &adapter->d_out;
 509
 510         FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP);
 511         st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter);
 512 }
 513
 514 static void dout_underrun(struct FsmInst *fsm, int event, void *arg)
 515 {
 516         struct st5481_adapter *adapter = fsm->userdata;
 517         struct st5481_d_out *d_out = &adapter->d_out;
 518
 519         if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) {
 520                 FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY);
 521         }  else {
 522                 dout_stop(fsm, event, arg);
 523         }
 524 }
 525
 526 static void dout_check_busy(struct FsmInst *fsm, int event, void *arg)
 527 {
 528         struct st5481_adapter *adapter = fsm->userdata;
 529         struct st5481_d_out *d_out = &adapter->d_out;
 530
 531         if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy))
 532                 dout_stop(fsm, event, arg);
 533 }
 534
 535 static void dout_reseted(struct FsmInst *fsm, int event, void *arg)
 536 {
 537         struct st5481_adapter *adapter = fsm->userdata;
 538         struct st5481_d_out *d_out = &adapter->d_out;
 539
 540         FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
 541         // FIXME locking
 542         if (d_out->tx_skb)
 543                 FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL);
 544 }
 545
 546 static void dout_complete(struct FsmInst *fsm, int event, void *arg)
 547 {
 548         struct st5481_adapter *adapter = fsm->userdata;
 549         long buf_nr = (long) arg;
 550
 551         usb_d_out(adapter, buf_nr);
 552 }
 553
 554 static void dout_ignore(struct FsmInst *fsm, int event, void *arg)
 555 {
 556 }
 557
 558 static struct FsmNode DoutFnList[] __initdata =
 559 {
 560         {ST_DOUT_NONE,                   EV_DOUT_START_XMIT,   dout_start_xmit},
 561
 562         {ST_DOUT_SHORT_INIT,             EV_DOUT_COMPLETE,     dout_short_fifo},
 563
 564         {ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_DEN,          dout_end_short_frame},
 565         {ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_UNDERRUN,     dout_underrun},
 566
 567         {ST_DOUT_LONG_INIT,              EV_DOUT_COMPLETE,     dout_long_enable_fifo},
 568
 569         {ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_DEN,          dout_long_den},
 570         {ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_UNDERRUN,     dout_underrun},
 571
 572         {ST_DOUT_NORMAL,                 EV_DOUT_UNDERRUN,     dout_underrun},
 573         {ST_DOUT_NORMAL,                 EV_DOUT_COMPLETE,     dout_complete},
 574
 575         {ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_UNDERRUN,     dout_underrun},
 576         {ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_COMPLETE,     dout_ignore},
 577
 578         {ST_DOUT_WAIT_FOR_NOT_BUSY,      EV_DOUT_COMPLETE,     dout_check_busy},
 579
 580         {ST_DOUT_WAIT_FOR_STOP,          EV_DOUT_STOPPED,      dout_reset},
 581
 582         {ST_DOUT_WAIT_FOR_RESET,         EV_DOUT_RESETED,      dout_reseted},
 583 };
 584
 585 void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg)
 586 {
 587         struct st5481_adapter *adapter = hisax_d_if->priv;
 588         struct sk_buff *skb = arg;
 589
 590         switch (pr) {
 591         case PH_ACTIVATE | REQUEST:
 592                 FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL);
 593                 break;
 594         case PH_DEACTIVATE | REQUEST:
 595                 FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL);
 596                 break;
 597         case PH_DATA | REQUEST:
 598                 DBG(2, "PH_DATA REQUEST len %d", skb->len);
 599                 BUG_ON(adapter->d_out.tx_skb);
 600                 adapter->d_out.tx_skb = skb;
 601                 FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL);
 602                 break;
 603         default:
 604                 WARN("pr %#x\n", pr);
 605                 break;
 606         }
 607 }
 608
 609 /* ======================================================================
 610  */
 611
 612 /*
 613  * Start receiving on the D channel since entered state F7.
 614  */
 615 static void ph_connect(struct st5481_adapter *adapter)
 616 {
 617         struct st5481_d_out *d_out = &adapter->d_out;
 618         struct st5481_in *d_in = &adapter->d_in;
 619
 620         DBG(8,"");
 621
 622         FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
 623
 624         //      st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL);
 625         st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL);
 626         st5481_in_mode(d_in, L1_MODE_HDLC);
 627
 628 #ifdef LOOPBACK
 629         // Turn loopback on (data sent on B and D looped back)
 630         st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL);
 631 #endif
 632
 633         st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL);
 634
 635         // Turn on the green LED to tell that we are in state F7
 636         adapter->leds |= GREEN_LED;
 637         st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
 638 }
 639
 640 /*
 641  * Stop receiving on the D channel since not in state F7.
 642  */
 643 static void ph_disconnect(struct st5481_adapter *adapter)
 644 {
 645         DBG(8,"");
 646
 647         st5481_in_mode(&adapter->d_in, L1_MODE_NULL);
 648
 649         // Turn off the green LED to tell that we left state F7
 650         adapter->leds &= ~GREEN_LED;
 651         st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
 652 }
 653
 654 static int st5481_setup_d_out(struct st5481_adapter *adapter)
 655 {
 656         struct usb_device *dev = adapter->usb_dev;
 657         struct usb_interface *intf;
 658         struct usb_host_interface *altsetting = NULL;
 659         struct usb_host_endpoint *endpoint;
 660         struct st5481_d_out *d_out = &adapter->d_out;
 661
 662         DBG(2,"");
 663
 664         intf = usb_ifnum_to_if(dev, 0);
 665         if (intf)
 666                 altsetting = usb_altnum_to_altsetting(intf, 3);
 667         if (!altsetting)
 668                 return -ENXIO;
 669
 670         // Allocate URBs and buffers for the D channel out
 671         endpoint = &altsetting->endpoint[EP_D_OUT-1];
 672
 673         DBG(2,"endpoint address=%02x,packet size=%d",
 674             endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
 675
 676         return st5481_setup_isocpipes(d_out->urb, dev,
 677                                       usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
 678                                       NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT,
 679                                       NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT,
 680                                       usb_d_out_complete, adapter);
 681 }
 682
 683 static void st5481_release_d_out(struct st5481_adapter *adapter)
 684 {
 685         struct st5481_d_out *d_out = &adapter->d_out;
 686
 687         DBG(2,"");
 688
 689         st5481_release_isocpipes(d_out->urb);
 690 }
 691
 692 int st5481_setup_d(struct st5481_adapter *adapter)
 693 {
 694         int retval;
 695
 696         DBG(2,"");
 697
 698         retval = st5481_setup_d_out(adapter);
 699         if (retval)
 700                 goto err;
 701         adapter->d_in.bufsize = MAX_DFRAME_LEN_L1;
 702         adapter->d_in.num_packets = NUM_ISO_PACKETS_D;
 703         adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN;
 704         adapter->d_in.ep = EP_D_IN | USB_DIR_IN;
 705         adapter->d_in.counter = IN_D_COUNTER;
 706         adapter->d_in.adapter = adapter;
 707         adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc;
 708         retval = st5481_setup_in(&adapter->d_in);
 709         if (retval)
 710                 goto err_d_out;
 711
 712         adapter->l1m.fsm = &l1fsm;
 713         adapter->l1m.state = ST_L1_F3;
 714         adapter->l1m.debug = st5481_debug & 0x100;
 715         adapter->l1m.userdata = adapter;
 716         adapter->l1m.printdebug = l1m_debug;
 717         FsmInitTimer(&adapter->l1m, &adapter->timer);
 718
 719         adapter->d_out.fsm.fsm = &dout_fsm;
 720         adapter->d_out.fsm.state = ST_DOUT_NONE;
 721         adapter->d_out.fsm.debug = st5481_debug & 0x100;
 722         adapter->d_out.fsm.userdata = adapter;
 723         adapter->d_out.fsm.printdebug = dout_debug;
 724
 725         return 0;
 726
 727  err_d_out:
 728         st5481_release_d_out(adapter);
 729  err:
 730         return retval;
 731 }
 732
 733 void st5481_release_d(struct st5481_adapter *adapter)
 734 {
 735         DBG(2,"");
 736
 737         st5481_release_in(&adapter->d_in);
 738         st5481_release_d_out(adapter);
 739 }
 740
 741 /* ======================================================================
 742  * init / exit
 743  */
 744
 745 int __init st5481_d_init(void)
 746 {
 747         int retval;
 748
 749         l1fsm.state_count = L1_STATE_COUNT;
 750         l1fsm.event_count = L1_EVENT_COUNT;
 751         l1fsm.strEvent = strL1Event;
 752         l1fsm.strState = strL1State;
 753         retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList));
 754         if (retval)
 755                 goto err;
 756
 757         dout_fsm.state_count = DOUT_STATE_COUNT;
 758         dout_fsm.event_count = DOUT_EVENT_COUNT;
 759         dout_fsm.strEvent = strDoutEvent;
 760         dout_fsm.strState = strDoutState;
 761         retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList));
 762         if (retval)
 763                 goto err_l1;
 764
 765         return 0;
 766
 767  err_l1:
 768         FsmFree(&l1fsm);
 769  err:
 770         return retval;
 771 }
 772
 773 // can't be __exit
 774 void st5481_d_exit(void)
 775 {
 776         FsmFree(&l1fsm);
 777         FsmFree(&dout_fsm);
 778 }