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   1 /* hfcsusb.c
   2  * mISDN driver for Colognechip HFC-S USB chip
   3  *
   4  * Copyright 2001 by Peter Sprenger (sprenger@moving-bytes.de)
   5  * Copyright 2008 by Martin Bachem (info@bachem-it.com)
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  *
  22  * module params
  23  *   debug=<n>, default=0, with n=0xHHHHGGGG
  24  *      H - l1 driver flags described in hfcsusb.h
  25  *      G - common mISDN debug flags described at mISDNhw.h
  26  *
  27  *   poll=<n>, default 128
  28  *     n : burst size of PH_DATA_IND at transparent rx data
  29  *
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/delay.h>
  34 #include <linux/usb.h>
  35 #include <linux/mISDNhw.h>
  36 #include "hfcsusb.h"
  37
  38 static const char *hfcsusb_rev = "Revision: 0.3.3 (socket), 2008-11-05";
  39
  40 static unsigned int debug;
  41 static int poll = DEFAULT_TRANSP_BURST_SZ;
  42
  43 static LIST_HEAD(HFClist);
  44 static DEFINE_RWLOCK(HFClock);
  45
  46
  47 MODULE_AUTHOR("Martin Bachem");
  48 MODULE_LICENSE("GPL");
  49 module_param(debug, uint, S_IRUGO | S_IWUSR);
  50 module_param(poll, int, 0);
  51
  52 static int hfcsusb_cnt;
  53
  54 /* some function prototypes */
  55 static void hfcsusb_ph_command(struct hfcsusb *hw, u_char command);
  56 static void release_hw(struct hfcsusb *hw);
  57 static void reset_hfcsusb(struct hfcsusb *hw);
  58 static void setPortMode(struct hfcsusb *hw);
  59 static void hfcsusb_start_endpoint(struct hfcsusb *hw, int channel);
  60 static void hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel);
  61 static int  hfcsusb_setup_bch(struct bchannel *bch, int protocol);
  62 static void deactivate_bchannel(struct bchannel *bch);
  63 static void hfcsusb_ph_info(struct hfcsusb *hw);
  64
  65 /* start next background transfer for control channel */
  66 static void
  67 ctrl_start_transfer(struct hfcsusb *hw)
  68 {
  69         if (debug & DBG_HFC_CALL_TRACE)
  70                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
  71
  72         if (hw->ctrl_cnt) {
  73                 hw->ctrl_urb->pipe = hw->ctrl_out_pipe;
  74                 hw->ctrl_urb->setup_packet = (u_char *)&hw->ctrl_write;
  75                 hw->ctrl_urb->transfer_buffer = NULL;
  76                 hw->ctrl_urb->transfer_buffer_length = 0;
  77                 hw->ctrl_write.wIndex =
  78                     cpu_to_le16(hw->ctrl_buff[hw->ctrl_out_idx].hfcs_reg);
  79                 hw->ctrl_write.wValue =
  80                     cpu_to_le16(hw->ctrl_buff[hw->ctrl_out_idx].reg_val);
  81
  82                 usb_submit_urb(hw->ctrl_urb, GFP_ATOMIC);
  83         }
  84 }
  85
  86 /*
  87  * queue a control transfer request to write HFC-S USB
  88  * chip register using CTRL resuest queue
  89  */
  90 static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val)
  91 {
  92         struct ctrl_buf *buf;
  93
  94         if (debug & DBG_HFC_CALL_TRACE)
  95                 printk(KERN_DEBUG "%s: %s reg(0x%02x) val(0x%02x)\n",
  96                         hw->name, __func__, reg, val);
  97
  98         spin_lock(&hw->ctrl_lock);
  99         if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 100                 return 1;
 101         buf = &hw->ctrl_buff[hw->ctrl_in_idx];
 102         buf->hfcs_reg = reg;
 103         buf->reg_val = val;
 104         if (++hw->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 105                 hw->ctrl_in_idx = 0;
 106         if (++hw->ctrl_cnt == 1)
 107                 ctrl_start_transfer(hw);
 108         spin_unlock(&hw->ctrl_lock);
 109
 110         return 0;
 111 }
 112
 113 /* control completion routine handling background control cmds */
 114 static void
 115 ctrl_complete(struct urb *urb)
 116 {
 117         struct hfcsusb *hw = (struct hfcsusb *) urb->context;
 118         struct ctrl_buf *buf;
 119
 120         if (debug & DBG_HFC_CALL_TRACE)
 121                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
 122
 123         urb->dev = hw->dev;
 124         if (hw->ctrl_cnt) {
 125                 buf = &hw->ctrl_buff[hw->ctrl_out_idx];
 126                 hw->ctrl_cnt--; /* decrement actual count */
 127                 if (++hw->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 128                         hw->ctrl_out_idx = 0;   /* pointer wrap */
 129
 130                 ctrl_start_transfer(hw); /* start next transfer */
 131         }
 132 }
 133
 134 /* handle LED bits   */
 135 static void
 136 set_led_bit(struct hfcsusb *hw, signed short led_bits, int set_on)
 137 {
 138         if (set_on) {
 139                 if (led_bits < 0)
 140                         hw->led_state &= ~abs(led_bits);
 141                 else
 142                         hw->led_state |= led_bits;
 143         } else {
 144                 if (led_bits < 0)
 145                         hw->led_state |= abs(led_bits);
 146                 else
 147                         hw->led_state &= ~led_bits;
 148         }
 149 }
 150
 151 /* handle LED requests  */
 152 static void
 153 handle_led(struct hfcsusb *hw, int event)
 154 {
 155         struct hfcsusb_vdata *driver_info = (struct hfcsusb_vdata *)
 156                 hfcsusb_idtab[hw->vend_idx].driver_info;
 157         __u8 tmpled;
 158
 159         if (driver_info->led_scheme == LED_OFF)
 160                 return;
 161         tmpled = hw->led_state;
 162
 163         switch (event) {
 164         case LED_POWER_ON:
 165                 set_led_bit(hw, driver_info->led_bits[0], 1);
 166                 set_led_bit(hw, driver_info->led_bits[1], 0);
 167                 set_led_bit(hw, driver_info->led_bits[2], 0);
 168                 set_led_bit(hw, driver_info->led_bits[3], 0);
 169                 break;
 170         case LED_POWER_OFF:
 171                 set_led_bit(hw, driver_info->led_bits[0], 0);
 172                 set_led_bit(hw, driver_info->led_bits[1], 0);
 173                 set_led_bit(hw, driver_info->led_bits[2], 0);
 174                 set_led_bit(hw, driver_info->led_bits[3], 0);
 175                 break;
 176         case LED_S0_ON:
 177                 set_led_bit(hw, driver_info->led_bits[1], 1);
 178                 break;
 179         case LED_S0_OFF:
 180                 set_led_bit(hw, driver_info->led_bits[1], 0);
 181                 break;
 182         case LED_B1_ON:
 183                 set_led_bit(hw, driver_info->led_bits[2], 1);
 184                 break;
 185         case LED_B1_OFF:
 186                 set_led_bit(hw, driver_info->led_bits[2], 0);
 187                 break;
 188         case LED_B2_ON:
 189                 set_led_bit(hw, driver_info->led_bits[3], 1);
 190                 break;
 191         case LED_B2_OFF:
 192                 set_led_bit(hw, driver_info->led_bits[3], 0);
 193                 break;
 194         }
 195
 196         if (hw->led_state != tmpled) {
 197                 if (debug & DBG_HFC_CALL_TRACE)
 198                         printk(KERN_DEBUG "%s: %s reg(0x%02x) val(x%02x)\n",
 199                             hw->name, __func__,
 200                             HFCUSB_P_DATA, hw->led_state);
 201
 202                 write_reg(hw, HFCUSB_P_DATA, hw->led_state);
 203         }
 204 }
 205
 206 /*
 207  * Layer2 -> Layer 1 Bchannel data
 208  */
 209 static int
 210 hfcusb_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
 211 {
 212         struct bchannel         *bch = container_of(ch, struct bchannel, ch);
 213         struct hfcsusb          *hw = bch->hw;
 214         int                     ret = -EINVAL;
 215         struct mISDNhead        *hh = mISDN_HEAD_P(skb);
 216         u_long                  flags;
 217
 218         if (debug & DBG_HFC_CALL_TRACE)
 219                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
 220
 221         switch (hh->prim) {
 222         case PH_DATA_REQ:
 223                 spin_lock_irqsave(&hw->lock, flags);
 224                 ret = bchannel_senddata(bch, skb);
 225                 spin_unlock_irqrestore(&hw->lock, flags);
 226                 if (debug & DBG_HFC_CALL_TRACE)
 227                         printk(KERN_DEBUG "%s: %s PH_DATA_REQ ret(%i)\n",
 228                                 hw->name, __func__, ret);
 229                 if (ret > 0) {
 230                         /*
 231                          * other l1 drivers don't send early confirms on
 232                          * transp data, but hfcsusb does because tx_next
 233                          * skb is needed in tx_iso_complete()
 234                          */
 235                         queue_ch_frame(ch, PH_DATA_CNF, hh->id, NULL);
 236                         ret = 0;
 237                 }
 238                 return ret;
 239         case PH_ACTIVATE_REQ:
 240                 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) {
 241                         hfcsusb_start_endpoint(hw, bch->nr);
 242                         ret = hfcsusb_setup_bch(bch, ch->protocol);
 243                 } else
 244                         ret = 0;
 245                 if (!ret)
 246                         _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
 247                                 0, NULL, GFP_KERNEL);
 248                 break;
 249         case PH_DEACTIVATE_REQ:
 250                 deactivate_bchannel(bch);
 251                 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY,
 252                         0, NULL, GFP_KERNEL);
 253                 ret = 0;
 254                 break;
 255         }
 256         if (!ret)
 257                 dev_kfree_skb(skb);
 258         return ret;
 259 }
 260
 261 /*
 262  * send full D/B channel status information
 263  * as MPH_INFORMATION_IND
 264  */
 265 static void
 266 hfcsusb_ph_info(struct hfcsusb *hw)
 267 {
 268         struct ph_info *phi;
 269         struct dchannel *dch = &hw->dch;
 270         int i;
 271
 272         phi = kzalloc(sizeof(struct ph_info) +
 273                 dch->dev.nrbchan * sizeof(struct ph_info_ch), GFP_ATOMIC);
 274         phi->dch.ch.protocol = hw->protocol;
 275         phi->dch.ch.Flags = dch->Flags;
 276         phi->dch.state = dch->state;
 277         phi->dch.num_bch = dch->dev.nrbchan;
 278         for (i = 0; i < dch->dev.nrbchan; i++) {
 279                 phi->bch[i].protocol = hw->bch[i].ch.protocol;
 280                 phi->bch[i].Flags = hw->bch[i].Flags;
 281         }
 282         _queue_data(&dch->dev.D, MPH_INFORMATION_IND, MISDN_ID_ANY,
 283                 sizeof(struct ph_info_dch) + dch->dev.nrbchan *
 284                 sizeof(struct ph_info_ch), phi, GFP_ATOMIC);
 285 }
 286
 287 /*
 288  * Layer2 -> Layer 1 Dchannel data
 289  */
 290 static int
 291 hfcusb_l2l1D(struct mISDNchannel *ch, struct sk_buff *skb)
 292 {
 293         struct mISDNdevice      *dev = container_of(ch, struct mISDNdevice, D);
 294         struct dchannel         *dch = container_of(dev, struct dchannel, dev);
 295         struct mISDNhead        *hh = mISDN_HEAD_P(skb);
 296         struct hfcsusb          *hw = dch->hw;
 297         int                     ret = -EINVAL;
 298         u_long                  flags;
 299
 300         switch (hh->prim) {
 301         case PH_DATA_REQ:
 302                 if (debug & DBG_HFC_CALL_TRACE)
 303                         printk(KERN_DEBUG "%s: %s: PH_DATA_REQ\n",
 304                                 hw->name, __func__);
 305
 306                 spin_lock_irqsave(&hw->lock, flags);
 307                 ret = dchannel_senddata(dch, skb);
 308                 spin_unlock_irqrestore(&hw->lock, flags);
 309                 if (ret > 0) {
 310                         ret = 0;
 311                         queue_ch_frame(ch, PH_DATA_CNF, hh->id, NULL);
 312                 }
 313                 break;
 314
 315         case PH_ACTIVATE_REQ:
 316                 if (debug & DBG_HFC_CALL_TRACE)
 317                         printk(KERN_DEBUG "%s: %s: PH_ACTIVATE_REQ %s\n",
 318                                 hw->name, __func__,
 319                                 (hw->protocol == ISDN_P_NT_S0) ? "NT" : "TE");
 320
 321                 if (hw->protocol == ISDN_P_NT_S0) {
 322                         ret = 0;
 323                         if (test_bit(FLG_ACTIVE, &dch->Flags)) {
 324                                 _queue_data(&dch->dev.D,
 325                                         PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
 326                                         NULL, GFP_ATOMIC);
 327                         } else {
 328                                 hfcsusb_ph_command(hw,
 329                                         HFC_L1_ACTIVATE_NT);
 330                                 test_and_set_bit(FLG_L2_ACTIVATED,
 331                                         &dch->Flags);
 332                         }
 333                 } else {
 334                         hfcsusb_ph_command(hw, HFC_L1_ACTIVATE_TE);
 335                         ret = l1_event(dch->l1, hh->prim);
 336                 }
 337                 break;
 338
 339         case PH_DEACTIVATE_REQ:
 340                 if (debug & DBG_HFC_CALL_TRACE)
 341                         printk(KERN_DEBUG "%s: %s: PH_DEACTIVATE_REQ\n",
 342                                 hw->name, __func__);
 343                 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
 344
 345                 if (hw->protocol == ISDN_P_NT_S0) {
 346                         hfcsusb_ph_command(hw, HFC_L1_DEACTIVATE_NT);
 347                         spin_lock_irqsave(&hw->lock, flags);
 348                         skb_queue_purge(&dch->squeue);
 349                         if (dch->tx_skb) {
 350                                 dev_kfree_skb(dch->tx_skb);
 351                                 dch->tx_skb = NULL;
 352                         }
 353                         dch->tx_idx = 0;
 354                         if (dch->rx_skb) {
 355                                 dev_kfree_skb(dch->rx_skb);
 356                                 dch->rx_skb = NULL;
 357                         }
 358                         test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
 359                         spin_unlock_irqrestore(&hw->lock, flags);
 360 #ifdef FIXME
 361                         if (test_and_clear_bit(FLG_L1_BUSY, &dch->Flags))
 362                                 dchannel_sched_event(&hc->dch, D_CLEARBUSY);
 363 #endif
 364                         ret = 0;
 365                 } else
 366                         ret = l1_event(dch->l1, hh->prim);
 367                 break;
 368         case MPH_INFORMATION_REQ:
 369                 hfcsusb_ph_info(hw);
 370                 ret = 0;
 371                 break;
 372         }
 373
 374         return ret;
 375 }
 376
 377 /*
 378  * Layer 1 callback function
 379  */
 380 static int
 381 hfc_l1callback(struct dchannel *dch, u_int cmd)
 382 {
 383         struct hfcsusb *hw = dch->hw;
 384
 385         if (debug & DBG_HFC_CALL_TRACE)
 386                 printk(KERN_DEBUG "%s: %s cmd 0x%x\n",
 387                         hw->name, __func__, cmd);
 388
 389         switch (cmd) {
 390         case INFO3_P8:
 391         case INFO3_P10:
 392         case HW_RESET_REQ:
 393         case HW_POWERUP_REQ:
 394                 break;
 395
 396         case HW_DEACT_REQ:
 397                 skb_queue_purge(&dch->squeue);
 398                 if (dch->tx_skb) {
 399                         dev_kfree_skb(dch->tx_skb);
 400                         dch->tx_skb = NULL;
 401                 }
 402                 dch->tx_idx = 0;
 403                 if (dch->rx_skb) {
 404                         dev_kfree_skb(dch->rx_skb);
 405                         dch->rx_skb = NULL;
 406                 }
 407                 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
 408                 break;
 409         case PH_ACTIVATE_IND:
 410                 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
 411                 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
 412                         GFP_ATOMIC);
 413                 break;
 414         case PH_DEACTIVATE_IND:
 415                 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
 416                 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
 417                         GFP_ATOMIC);
 418                 break;
 419         default:
 420                 if (dch->debug & DEBUG_HW)
 421                         printk(KERN_DEBUG "%s: %s: unknown cmd %x\n",
 422                         hw->name, __func__, cmd);
 423                 return -1;
 424         }
 425         hfcsusb_ph_info(hw);
 426         return 0;
 427 }
 428
 429 static int
 430 open_dchannel(struct hfcsusb *hw, struct mISDNchannel *ch,
 431     struct channel_req *rq)
 432 {
 433         int err = 0;
 434
 435         if (debug & DEBUG_HW_OPEN)
 436                 printk(KERN_DEBUG "%s: %s: dev(%d) open addr(%i) from %p\n",
 437                     hw->name, __func__, hw->dch.dev.id, rq->adr.channel,
 438                     __builtin_return_address(0));
 439         if (rq->protocol == ISDN_P_NONE)
 440                 return -EINVAL;
 441
 442         test_and_clear_bit(FLG_ACTIVE, &hw->dch.Flags);
 443         test_and_clear_bit(FLG_ACTIVE, &hw->ech.Flags);
 444         hfcsusb_start_endpoint(hw, HFC_CHAN_D);
 445
 446         /* E-Channel logging */
 447         if (rq->adr.channel == 1) {
 448                 if (hw->fifos[HFCUSB_PCM_RX].pipe) {
 449                         hfcsusb_start_endpoint(hw, HFC_CHAN_E);
 450                         set_bit(FLG_ACTIVE, &hw->ech.Flags);
 451                         _queue_data(&hw->ech.dev.D, PH_ACTIVATE_IND,
 452                                      MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
 453                 } else
 454                         return -EINVAL;
 455         }
 456
 457         if (!hw->initdone) {
 458                 hw->protocol = rq->protocol;
 459                 if (rq->protocol == ISDN_P_TE_S0) {
 460                         err = create_l1(&hw->dch, hfc_l1callback);
 461                         if (err)
 462                                 return err;
 463                 }
 464                 setPortMode(hw);
 465                 ch->protocol = rq->protocol;
 466                 hw->initdone = 1;
 467         } else {
 468                 if (rq->protocol != ch->protocol)
 469                         return -EPROTONOSUPPORT;
 470         }
 471
 472         if (((ch->protocol == ISDN_P_NT_S0) && (hw->dch.state == 3)) ||
 473             ((ch->protocol == ISDN_P_TE_S0) && (hw->dch.state == 7)))
 474                 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
 475                     0, NULL, GFP_KERNEL);
 476         rq->ch = ch;
 477         if (!try_module_get(THIS_MODULE))
 478                 printk(KERN_WARNING "%s: %s: cannot get module\n",
 479                     hw->name, __func__);
 480         return 0;
 481 }
 482
 483 static int
 484 open_bchannel(struct hfcsusb *hw, struct channel_req *rq)
 485 {
 486         struct bchannel         *bch;
 487
 488         if (rq->adr.channel > 2)
 489                 return -EINVAL;
 490         if (rq->protocol == ISDN_P_NONE)
 491                 return -EINVAL;
 492
 493         if (debug & DBG_HFC_CALL_TRACE)
 494                 printk(KERN_DEBUG "%s: %s B%i\n",
 495                         hw->name, __func__, rq->adr.channel);
 496
 497         bch = &hw->bch[rq->adr.channel - 1];
 498         if (test_and_set_bit(FLG_OPEN, &bch->Flags))
 499                 return -EBUSY; /* b-channel can be only open once */
 500         test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags);
 501         bch->ch.protocol = rq->protocol;
 502         rq->ch = &bch->ch;
 503
 504         /* start USB endpoint for bchannel */
 505         if (rq->adr.channel  == 1)
 506                 hfcsusb_start_endpoint(hw, HFC_CHAN_B1);
 507         else
 508                 hfcsusb_start_endpoint(hw, HFC_CHAN_B2);
 509
 510         if (!try_module_get(THIS_MODULE))
 511                 printk(KERN_WARNING "%s: %s:cannot get module\n",
 512                     hw->name, __func__);
 513         return 0;
 514 }
 515
 516 static int
 517 channel_ctrl(struct hfcsusb *hw, struct mISDN_ctrl_req *cq)
 518 {
 519         int ret = 0;
 520
 521         if (debug & DBG_HFC_CALL_TRACE)
 522                 printk(KERN_DEBUG "%s: %s op(0x%x) channel(0x%x)\n",
 523                     hw->name, __func__, (cq->op), (cq->channel));
 524
 525         switch (cq->op) {
 526         case MISDN_CTRL_GETOP:
 527                 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_CONNECT |
 528                          MISDN_CTRL_DISCONNECT;
 529                 break;
 530         default:
 531                 printk(KERN_WARNING "%s: %s: unknown Op %x\n",
 532                         hw->name, __func__, cq->op);
 533                 ret = -EINVAL;
 534                 break;
 535         }
 536         return ret;
 537 }
 538
 539 /*
 540  * device control function
 541  */
 542 static int
 543 hfc_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
 544 {
 545         struct mISDNdevice      *dev = container_of(ch, struct mISDNdevice, D);
 546         struct dchannel         *dch = container_of(dev, struct dchannel, dev);
 547         struct hfcsusb          *hw = dch->hw;
 548         struct channel_req      *rq;
 549         int                     err = 0;
 550
 551         if (dch->debug & DEBUG_HW)
 552                 printk(KERN_DEBUG "%s: %s: cmd:%x %p\n",
 553                     hw->name, __func__, cmd, arg);
 554         switch (cmd) {
 555         case OPEN_CHANNEL:
 556                 rq = arg;
 557                 if ((rq->protocol == ISDN_P_TE_S0) ||
 558                     (rq->protocol == ISDN_P_NT_S0))
 559                         err = open_dchannel(hw, ch, rq);
 560                 else
 561                         err = open_bchannel(hw, rq);
 562                 if (!err)
 563                         hw->open++;
 564                 break;
 565         case CLOSE_CHANNEL:
 566                 hw->open--;
 567                 if (debug & DEBUG_HW_OPEN)
 568                         printk(KERN_DEBUG
 569                                 "%s: %s: dev(%d) close from %p (open %d)\n",
 570                                 hw->name, __func__, hw->dch.dev.id,
 571                                 __builtin_return_address(0), hw->open);
 572                 if (!hw->open) {
 573                         hfcsusb_stop_endpoint(hw, HFC_CHAN_D);
 574                         if (hw->fifos[HFCUSB_PCM_RX].pipe)
 575                                 hfcsusb_stop_endpoint(hw, HFC_CHAN_E);
 576                         handle_led(hw, LED_POWER_ON);
 577                 }
 578                 module_put(THIS_MODULE);
 579                 break;
 580         case CONTROL_CHANNEL:
 581                 err = channel_ctrl(hw, arg);
 582                 break;
 583         default:
 584                 if (dch->debug & DEBUG_HW)
 585                         printk(KERN_DEBUG "%s: %s: unknown command %x\n",
 586                                 hw->name, __func__, cmd);
 587                 return -EINVAL;
 588         }
 589         return err;
 590 }
 591
 592 /*
 593  * S0 TE state change event handler
 594  */
 595 static void
 596 ph_state_te(struct dchannel *dch)
 597 {
 598         struct hfcsusb *hw = dch->hw;
 599
 600         if (debug & DEBUG_HW) {
 601                 if (dch->state <= HFC_MAX_TE_LAYER1_STATE)
 602                         printk(KERN_DEBUG "%s: %s: %s\n", hw->name, __func__,
 603                             HFC_TE_LAYER1_STATES[dch->state]);
 604                 else
 605                         printk(KERN_DEBUG "%s: %s: TE F%d\n",
 606                             hw->name, __func__, dch->state);
 607         }
 608
 609         switch (dch->state) {
 610         case 0:
 611                 l1_event(dch->l1, HW_RESET_IND);
 612                 break;
 613         case 3:
 614                 l1_event(dch->l1, HW_DEACT_IND);
 615                 break;
 616         case 5:
 617         case 8:
 618                 l1_event(dch->l1, ANYSIGNAL);
 619                 break;
 620         case 6:
 621                 l1_event(dch->l1, INFO2);
 622                 break;
 623         case 7:
 624                 l1_event(dch->l1, INFO4_P8);
 625                 break;
 626         }
 627         if (dch->state == 7)
 628                 handle_led(hw, LED_S0_ON);
 629         else
 630                 handle_led(hw, LED_S0_OFF);
 631 }
 632
 633 /*
 634  * S0 NT state change event handler
 635  */
 636 static void
 637 ph_state_nt(struct dchannel *dch)
 638 {
 639         struct hfcsusb *hw = dch->hw;
 640
 641         if (debug & DEBUG_HW) {
 642                 if (dch->state <= HFC_MAX_NT_LAYER1_STATE)
 643                         printk(KERN_DEBUG "%s: %s: %s\n",
 644                             hw->name, __func__,
 645                             HFC_NT_LAYER1_STATES[dch->state]);
 646
 647                 else
 648                         printk(KERN_INFO DRIVER_NAME "%s: %s: NT G%d\n",
 649                             hw->name, __func__, dch->state);
 650         }
 651
 652         switch (dch->state) {
 653         case (1):
 654                 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
 655                 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
 656                 hw->nt_timer = 0;
 657                 hw->timers &= ~NT_ACTIVATION_TIMER;
 658                 handle_led(hw, LED_S0_OFF);
 659                 break;
 660
 661         case (2):
 662                 if (hw->nt_timer < 0) {
 663                         hw->nt_timer = 0;
 664                         hw->timers &= ~NT_ACTIVATION_TIMER;
 665                         hfcsusb_ph_command(dch->hw, HFC_L1_DEACTIVATE_NT);
 666                 } else {
 667                         hw->timers |= NT_ACTIVATION_TIMER;
 668                         hw->nt_timer = NT_T1_COUNT;
 669                         /* allow G2 -> G3 transition */
 670                         write_reg(hw, HFCUSB_STATES, 2 | HFCUSB_NT_G2_G3);
 671                 }
 672                 break;
 673         case (3):
 674                 hw->nt_timer = 0;
 675                 hw->timers &= ~NT_ACTIVATION_TIMER;
 676                 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
 677                 _queue_data(&dch->dev.D, PH_ACTIVATE_IND,
 678                         MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
 679                 handle_led(hw, LED_S0_ON);
 680                 break;
 681         case (4):
 682                 hw->nt_timer = 0;
 683                 hw->timers &= ~NT_ACTIVATION_TIMER;
 684                 break;
 685         default:
 686                 break;
 687         }
 688         hfcsusb_ph_info(hw);
 689 }
 690
 691 static void
 692 ph_state(struct dchannel *dch)
 693 {
 694         struct hfcsusb *hw = dch->hw;
 695
 696         if (hw->protocol == ISDN_P_NT_S0)
 697                 ph_state_nt(dch);
 698         else if (hw->protocol == ISDN_P_TE_S0)
 699                 ph_state_te(dch);
 700 }
 701
 702 /*
 703  * disable/enable BChannel for desired protocoll
 704  */
 705 static int
 706 hfcsusb_setup_bch(struct bchannel *bch, int protocol)
 707 {
 708         struct hfcsusb *hw = bch->hw;
 709         __u8 conhdlc, sctrl, sctrl_r;
 710
 711         if (debug & DEBUG_HW)
 712                 printk(KERN_DEBUG "%s: %s: protocol %x-->%x B%d\n",
 713                     hw->name, __func__, bch->state, protocol,
 714                     bch->nr);
 715
 716         /* setup val for CON_HDLC */
 717         conhdlc = 0;
 718         if (protocol > ISDN_P_NONE)
 719                 conhdlc = 8;    /* enable FIFO */
 720
 721         switch (protocol) {
 722         case (-1):      /* used for init */
 723                 bch->state = -1;
 724                 /* fall trough */
 725         case (ISDN_P_NONE):
 726                 if (bch->state == ISDN_P_NONE)
 727                         return 0; /* already in idle state */
 728                 bch->state = ISDN_P_NONE;
 729                 clear_bit(FLG_HDLC, &bch->Flags);
 730                 clear_bit(FLG_TRANSPARENT, &bch->Flags);
 731                 break;
 732         case (ISDN_P_B_RAW):
 733                 conhdlc |= 2;
 734                 bch->state = protocol;
 735                 set_bit(FLG_TRANSPARENT, &bch->Flags);
 736                 break;
 737         case (ISDN_P_B_HDLC):
 738                 bch->state = protocol;
 739                 set_bit(FLG_HDLC, &bch->Flags);
 740                 break;
 741         default:
 742                 if (debug & DEBUG_HW)
 743                         printk(KERN_DEBUG "%s: %s: prot not known %x\n",
 744                                 hw->name, __func__, protocol);
 745                 return -ENOPROTOOPT;
 746         }
 747
 748         if (protocol >= ISDN_P_NONE) {
 749                 write_reg(hw, HFCUSB_FIFO, (bch->nr == 1) ? 0 : 2);
 750                 write_reg(hw, HFCUSB_CON_HDLC, conhdlc);
 751                 write_reg(hw, HFCUSB_INC_RES_F, 2);
 752                 write_reg(hw, HFCUSB_FIFO, (bch->nr == 1) ? 1 : 3);
 753                 write_reg(hw, HFCUSB_CON_HDLC, conhdlc);
 754                 write_reg(hw, HFCUSB_INC_RES_F, 2);
 755
 756                 sctrl = 0x40 + ((hw->protocol == ISDN_P_TE_S0) ? 0x00 : 0x04);
 757                 sctrl_r = 0x0;
 758                 if (test_bit(FLG_ACTIVE, &hw->bch[0].Flags)) {
 759                         sctrl |= 1;
 760                         sctrl_r |= 1;
 761                 }
 762                 if (test_bit(FLG_ACTIVE, &hw->bch[1].Flags)) {
 763                         sctrl |= 2;
 764                         sctrl_r |= 2;
 765                 }
 766                 write_reg(hw, HFCUSB_SCTRL, sctrl);
 767                 write_reg(hw, HFCUSB_SCTRL_R, sctrl_r);
 768
 769                 if (protocol > ISDN_P_NONE)
 770                         handle_led(hw, (bch->nr == 1) ? LED_B1_ON : LED_B2_ON);
 771                 else
 772                         handle_led(hw, (bch->nr == 1) ? LED_B1_OFF :
 773                                 LED_B2_OFF);
 774         }
 775         hfcsusb_ph_info(hw);
 776         return 0;
 777 }
 778
 779 static void
 780 hfcsusb_ph_command(struct hfcsusb *hw, u_char command)
 781 {
 782         if (debug & DEBUG_HW)
 783                 printk(KERN_DEBUG "%s: %s: %x\n",
 784                    hw->name, __func__, command);
 785
 786         switch (command) {
 787         case HFC_L1_ACTIVATE_TE:
 788                 /* force sending sending INFO1 */
 789                 write_reg(hw, HFCUSB_STATES, 0x14);
 790                 /* start l1 activation */
 791                 write_reg(hw, HFCUSB_STATES, 0x04);
 792                 break;
 793
 794         case HFC_L1_FORCE_DEACTIVATE_TE:
 795                 write_reg(hw, HFCUSB_STATES, 0x10);
 796                 write_reg(hw, HFCUSB_STATES, 0x03);
 797                 break;
 798
 799         case HFC_L1_ACTIVATE_NT:
 800                 if (hw->dch.state == 3)
 801                         _queue_data(&hw->dch.dev.D, PH_ACTIVATE_IND,
 802                                 MISDN_ID_ANY, 0, NULL, GFP_ATOMIC);
 803                 else
 804                         write_reg(hw, HFCUSB_STATES, HFCUSB_ACTIVATE |
 805                                 HFCUSB_DO_ACTION | HFCUSB_NT_G2_G3);
 806                 break;
 807
 808         case HFC_L1_DEACTIVATE_NT:
 809                 write_reg(hw, HFCUSB_STATES,
 810                         HFCUSB_DO_ACTION);
 811                 break;
 812         }
 813 }
 814
 815 /*
 816  * Layer 1 B-channel hardware access
 817  */
 818 static int
 819 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
 820 {
 821         int     ret = 0;
 822
 823         switch (cq->op) {
 824         case MISDN_CTRL_GETOP:
 825                 cq->op = MISDN_CTRL_FILL_EMPTY;
 826                 break;
 827         case MISDN_CTRL_FILL_EMPTY: /* fill fifo, if empty */
 828                 test_and_set_bit(FLG_FILLEMPTY, &bch->Flags);
 829                 if (debug & DEBUG_HW_OPEN)
 830                         printk(KERN_DEBUG "%s: FILL_EMPTY request (nr=%d "
 831                                 "off=%d)\n", __func__, bch->nr, !!cq->p1);
 832                 break;
 833         default:
 834                 printk(KERN_WARNING "%s: unknown Op %x\n", __func__, cq->op);
 835                 ret = -EINVAL;
 836                 break;
 837         }
 838         return ret;
 839 }
 840
 841 /* collect data from incoming interrupt or isochron USB data */
 842 static void
 843 hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
 844         int finish)
 845 {
 846         struct hfcsusb  *hw = fifo->hw;
 847         struct sk_buff  *rx_skb = NULL;
 848         int             maxlen = 0;
 849         int             fifon = fifo->fifonum;
 850         int             i;
 851         int             hdlc = 0;
 852
 853         if (debug & DBG_HFC_CALL_TRACE)
 854                 printk(KERN_DEBUG "%s: %s: fifo(%i) len(%i) "
 855                     "dch(%p) bch(%p) ech(%p)\n",
 856                     hw->name, __func__, fifon, len,
 857                     fifo->dch, fifo->bch, fifo->ech);
 858
 859         if (!len)
 860                 return;
 861
 862         if ((!!fifo->dch + !!fifo->bch + !!fifo->ech) != 1) {
 863                 printk(KERN_DEBUG "%s: %s: undefined channel\n",
 864                        hw->name, __func__);
 865                 return;
 866         }
 867
 868         spin_lock(&hw->lock);
 869         if (fifo->dch) {
 870                 rx_skb = fifo->dch->rx_skb;
 871                 maxlen = fifo->dch->maxlen;
 872                 hdlc = 1;
 873         }
 874         if (fifo->bch) {
 875                 rx_skb = fifo->bch->rx_skb;
 876                 maxlen = fifo->bch->maxlen;
 877                 hdlc = test_bit(FLG_HDLC, &fifo->bch->Flags);
 878         }
 879         if (fifo->ech) {
 880                 rx_skb = fifo->ech->rx_skb;
 881                 maxlen = fifo->ech->maxlen;
 882                 hdlc = 1;
 883         }
 884
 885         if (!rx_skb) {
 886                 rx_skb = mI_alloc_skb(maxlen, GFP_ATOMIC);
 887                 if (rx_skb) {
 888                         if (fifo->dch)
 889                                 fifo->dch->rx_skb = rx_skb;
 890                         if (fifo->bch)
 891                                 fifo->bch->rx_skb = rx_skb;
 892                         if (fifo->ech)
 893                                 fifo->ech->rx_skb = rx_skb;
 894                         skb_trim(rx_skb, 0);
 895                 } else {
 896                         printk(KERN_DEBUG "%s: %s: No mem for rx_skb\n",
 897                             hw->name, __func__);
 898                         spin_unlock(&hw->lock);
 899                         return;
 900                 }
 901         }
 902
 903         if (fifo->dch || fifo->ech) {
 904                 /* D/E-Channel SKB range check */
 905                 if ((rx_skb->len + len) >= MAX_DFRAME_LEN_L1) {
 906                         printk(KERN_DEBUG "%s: %s: sbk mem exceeded "
 907                             "for fifo(%d) HFCUSB_D_RX\n",
 908                             hw->name, __func__, fifon);
 909                         skb_trim(rx_skb, 0);
 910                         spin_unlock(&hw->lock);
 911                         return;
 912                 }
 913         } else if (fifo->bch) {
 914                 /* B-Channel SKB range check */
 915                 if ((rx_skb->len + len) >= (MAX_BCH_SIZE + 3)) {
 916                         printk(KERN_DEBUG "%s: %s: sbk mem exceeded "
 917                             "for fifo(%d) HFCUSB_B_RX\n",
 918                             hw->name, __func__, fifon);
 919                         skb_trim(rx_skb, 0);
 920                         spin_unlock(&hw->lock);
 921                         return;
 922                 }
 923         }
 924
 925         memcpy(skb_put(rx_skb, len), data, len);
 926
 927         if (hdlc) {
 928                 /* we have a complete hdlc packet */
 929                 if (finish) {
 930                         if ((rx_skb->len > 3) &&
 931                            (!(rx_skb->data[rx_skb->len - 1]))) {
 932                                 if (debug & DBG_HFC_FIFO_VERBOSE) {
 933                                         printk(KERN_DEBUG "%s: %s: fifon(%i)"
 934                                             " new RX len(%i): ",
 935                                             hw->name, __func__, fifon,
 936                                             rx_skb->len);
 937                                         i = 0;
 938                                         while (i < rx_skb->len)
 939                                                 printk("%02x ",
 940                                                     rx_skb->data[i++]);
 941                                         printk("\n");
 942                                 }
 943
 944                                 /* remove CRC & status */
 945                                 skb_trim(rx_skb, rx_skb->len - 3);
 946
 947                                 if (fifo->dch)
 948                                         recv_Dchannel(fifo->dch);
 949                                 if (fifo->bch)
 950                                         recv_Bchannel(fifo->bch, MISDN_ID_ANY);
 951                                 if (fifo->ech)
 952                                         recv_Echannel(fifo->ech,
 953                                                      &hw->dch);
 954                         } else {
 955                                 if (debug & DBG_HFC_FIFO_VERBOSE) {
 956                                         printk(KERN_DEBUG
 957                                             "%s: CRC or minlen ERROR fifon(%i) "
 958                                             "RX len(%i): ",
 959                                             hw->name, fifon, rx_skb->len);
 960                                         i = 0;
 961                                         while (i < rx_skb->len)
 962                                                 printk("%02x ",
 963                                                     rx_skb->data[i++]);
 964                                         printk("\n");
 965                                 }
 966                                 skb_trim(rx_skb, 0);
 967                         }
 968                 }
 969         } else {
 970                 /* deliver transparent data to layer2 */
 971                 if (rx_skb->len >= poll)
 972                         recv_Bchannel(fifo->bch, MISDN_ID_ANY);
 973         }
 974         spin_unlock(&hw->lock);
 975 }
 976
 977 static void
 978 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 979               void *buf, int num_packets, int packet_size, int interval,
 980               usb_complete_t complete, void *context)
 981 {
 982         int k;
 983
 984         usb_fill_bulk_urb(urb, dev, pipe, buf, packet_size * num_packets,
 985             complete, context);
 986
 987         urb->number_of_packets = num_packets;
 988         urb->transfer_flags = URB_ISO_ASAP;
 989         urb->actual_length = 0;
 990         urb->interval = interval;
 991
 992         for (k = 0; k < num_packets; k++) {
 993                 urb->iso_frame_desc[k].offset = packet_size * k;
 994                 urb->iso_frame_desc[k].length = packet_size;
 995                 urb->iso_frame_desc[k].actual_length = 0;
 996         }
 997 }
 998
 999 /* receive completion routine for all ISO tx fifos   */
1000 static void
1001 rx_iso_complete(struct urb *urb)
1002 {
1003         struct iso_urb *context_iso_urb = (struct iso_urb *) urb->context;
1004         struct usb_fifo *fifo = context_iso_urb->owner_fifo;
1005         struct hfcsusb *hw = fifo->hw;
1006         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
1007             status, iso_status, i;
1008         __u8 *buf;
1009         static __u8 eof[8];
1010         __u8 s0_state;
1011
1012         fifon = fifo->fifonum;
1013         status = urb->status;
1014
1015         spin_lock(&hw->lock);
1016         if (fifo->stop_gracefull) {
1017                 fifo->stop_gracefull = 0;
1018                 fifo->active = 0;
1019                 spin_unlock(&hw->lock);
1020                 return;
1021         }
1022         spin_unlock(&hw->lock);
1023
1024         /*
1025          * ISO transfer only partially completed,
1026          * look at individual frame status for details
1027          */
1028         if (status == -EXDEV) {
1029                 if (debug & DEBUG_HW)
1030                         printk(KERN_DEBUG "%s: %s: with -EXDEV "
1031                             "urb->status %d, fifonum %d\n",
1032                             hw->name, __func__,  status, fifon);
1033
1034                 /* clear status, so go on with ISO transfers */
1035                 status = 0;
1036         }
1037
1038         s0_state = 0;
1039         if (fifo->active && !status) {
1040                 num_isoc_packets = iso_packets[fifon];
1041                 maxlen = fifo->usb_packet_maxlen;
1042
1043                 for (k = 0; k < num_isoc_packets; ++k) {
1044                         len = urb->iso_frame_desc[k].actual_length;
1045                         offset = urb->iso_frame_desc[k].offset;
1046                         buf = context_iso_urb->buffer + offset;
1047                         iso_status = urb->iso_frame_desc[k].status;
1048
1049                         if (iso_status && (debug & DBG_HFC_FIFO_VERBOSE)) {
1050                                 printk(KERN_DEBUG "%s: %s: "
1051                                     "ISO packet %i, status: %i\n",
1052                                     hw->name, __func__, k, iso_status);
1053                         }
1054
1055                         /* USB data log for every D ISO in */
1056                         if ((fifon == HFCUSB_D_RX) &&
1057                             (debug & DBG_HFC_USB_VERBOSE)) {
1058                                 printk(KERN_DEBUG
1059                                     "%s: %s: %d (%d/%d) len(%d) ",
1060                                     hw->name, __func__, urb->start_frame,
1061                                     k, num_isoc_packets-1,
1062                                     len);
1063                                 for (i = 0; i < len; i++)
1064                                         printk("%x ", buf[i]);
1065                                 printk("\n");
1066                         }
1067
1068                         if (!iso_status) {
1069                                 if (fifo->last_urblen != maxlen) {
1070                                         /*
1071                                          * save fifo fill-level threshold bits
1072                                          * to use them later in TX ISO URB
1073                                          * completions
1074                                          */
1075                                         hw->threshold_mask = buf[1];
1076
1077                                         if (fifon == HFCUSB_D_RX)
1078                                                 s0_state = (buf[0] >> 4);
1079
1080                                         eof[fifon] = buf[0] & 1;
1081                                         if (len > 2)
1082                                                 hfcsusb_rx_frame(fifo, buf + 2,
1083                                                         len - 2, (len < maxlen)
1084                                                         ? eof[fifon] : 0);
1085                                 } else
1086                                         hfcsusb_rx_frame(fifo, buf, len,
1087                                                 (len < maxlen) ?
1088                                                 eof[fifon] : 0);
1089                                 fifo->last_urblen = len;
1090                         }
1091                 }
1092
1093                 /* signal S0 layer1 state change */
1094                 if ((s0_state) && (hw->initdone) &&
1095                     (s0_state != hw->dch.state)) {
1096                         hw->dch.state = s0_state;
1097                         schedule_event(&hw->dch, FLG_PHCHANGE);
1098                 }
1099
1100                 fill_isoc_urb(urb, fifo->hw->dev, fifo->pipe,
1101                               context_iso_urb->buffer, num_isoc_packets,
1102                               fifo->usb_packet_maxlen, fifo->intervall,
1103                               (usb_complete_t)rx_iso_complete, urb->context);
1104                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
1105                 if (errcode < 0) {
1106                         if (debug & DEBUG_HW)
1107                                 printk(KERN_DEBUG "%s: %s: error submitting "
1108                                     "ISO URB: %d\n",
1109                                     hw->name, __func__, errcode);
1110                 }
1111         } else {
1112                 if (status && (debug & DBG_HFC_URB_INFO))
1113                         printk(KERN_DEBUG "%s: %s: rx_iso_complete : "
1114                             "urb->status %d, fifonum %d\n",
1115                             hw->name, __func__, status, fifon);
1116         }
1117 }
1118
1119 /* receive completion routine for all interrupt rx fifos */
1120 static void
1121 rx_int_complete(struct urb *urb)
1122 {
1123         int len, status, i;
1124         __u8 *buf, maxlen, fifon;
1125         struct usb_fifo *fifo = (struct usb_fifo *) urb->context;
1126         struct hfcsusb *hw = fifo->hw;
1127         static __u8 eof[8];
1128
1129         spin_lock(&hw->lock);
1130         if (fifo->stop_gracefull) {
1131                 fifo->stop_gracefull = 0;
1132                 fifo->active = 0;
1133                 spin_unlock(&hw->lock);
1134                 return;
1135         }
1136         spin_unlock(&hw->lock);
1137
1138         fifon = fifo->fifonum;
1139         if ((!fifo->active) || (urb->status)) {
1140                 if (debug & DBG_HFC_URB_ERROR)
1141                         printk(KERN_DEBUG
1142                             "%s: %s: RX-Fifo %i is going down (%i)\n",
1143                             hw->name, __func__, fifon, urb->status);
1144
1145                 fifo->urb->interval = 0; /* cancel automatic rescheduling */
1146                 return;
1147         }
1148         len = urb->actual_length;
1149         buf = fifo->buffer;
1150         maxlen = fifo->usb_packet_maxlen;
1151
1152         /* USB data log for every D INT in */
1153         if ((fifon == HFCUSB_D_RX) && (debug & DBG_HFC_USB_VERBOSE)) {
1154                 printk(KERN_DEBUG "%s: %s: D RX INT len(%d) ",
1155                     hw->name, __func__, len);
1156                 for (i = 0; i < len; i++)
1157                         printk("%02x ", buf[i]);
1158                 printk("\n");
1159         }
1160
1161         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
1162                 /* the threshold mask is in the 2nd status byte */
1163                 hw->threshold_mask = buf[1];
1164
1165                 /* signal S0 layer1 state change */
1166                 if (hw->initdone && ((buf[0] >> 4) != hw->dch.state)) {
1167                         hw->dch.state = (buf[0] >> 4);
1168                         schedule_event(&hw->dch, FLG_PHCHANGE);
1169                 }
1170
1171                 eof[fifon] = buf[0] & 1;
1172                 /* if we have more than the 2 status bytes -> collect data */
1173                 if (len > 2)
1174                         hfcsusb_rx_frame(fifo, buf + 2,
1175                            urb->actual_length - 2,
1176                            (len < maxlen) ? eof[fifon] : 0);
1177         } else {
1178                 hfcsusb_rx_frame(fifo, buf, urb->actual_length,
1179                                  (len < maxlen) ? eof[fifon] : 0);
1180         }
1181         fifo->last_urblen = urb->actual_length;
1182
1183         status = usb_submit_urb(urb, GFP_ATOMIC);
1184         if (status) {
1185                 if (debug & DEBUG_HW)
1186                         printk(KERN_DEBUG "%s: %s: error resubmitting USB\n",
1187                             hw->name, __func__);
1188         }
1189 }
1190
1191 /* transmit completion routine for all ISO tx fifos */
1192 static void
1193 tx_iso_complete(struct urb *urb)
1194 {
1195         struct iso_urb *context_iso_urb = (struct iso_urb *) urb->context;
1196         struct usb_fifo *fifo = context_iso_urb->owner_fifo;
1197         struct hfcsusb *hw = fifo->hw;
1198         struct sk_buff *tx_skb;
1199         int k, tx_offset, num_isoc_packets, sink, remain, current_len,
1200             errcode, hdlc, i;
1201         int *tx_idx;
1202         int frame_complete, fifon, status;
1203         __u8 threshbit;
1204
1205         spin_lock(&hw->lock);
1206         if (fifo->stop_gracefull) {
1207                 fifo->stop_gracefull = 0;
1208                 fifo->active = 0;
1209                 spin_unlock(&hw->lock);
1210                 return;
1211         }
1212
1213         if (fifo->dch) {
1214                 tx_skb = fifo->dch->tx_skb;
1215                 tx_idx = &fifo->dch->tx_idx;
1216                 hdlc = 1;
1217         } else if (fifo->bch) {
1218                 tx_skb = fifo->bch->tx_skb;
1219                 tx_idx = &fifo->bch->tx_idx;
1220                 hdlc = test_bit(FLG_HDLC, &fifo->bch->Flags);
1221         } else {
1222                 printk(KERN_DEBUG "%s: %s: neither BCH nor DCH\n",
1223                     hw->name, __func__);
1224                 spin_unlock(&hw->lock);
1225                 return;
1226         }
1227
1228         fifon = fifo->fifonum;
1229         status = urb->status;
1230
1231         tx_offset = 0;
1232
1233         /*
1234          * ISO transfer only partially completed,
1235          * look at individual frame status for details
1236          */
1237         if (status == -EXDEV) {
1238                 if (debug & DBG_HFC_URB_ERROR)
1239                         printk(KERN_DEBUG "%s: %s: "
1240                             "-EXDEV (%i) fifon (%d)\n",
1241                             hw->name, __func__, status, fifon);
1242
1243                 /* clear status, so go on with ISO transfers */
1244                 status = 0;
1245         }
1246
1247         if (fifo->active && !status) {
1248                 /* is FifoFull-threshold set for our channel? */
1249                 threshbit = (hw->threshold_mask & (1 << fifon));
1250                 num_isoc_packets = iso_packets[fifon];
1251
1252                 /* predict dataflow to avoid fifo overflow */
1253                 if (fifon >= HFCUSB_D_TX)
1254                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
1255                 else
1256                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
1257                 fill_isoc_urb(urb, fifo->hw->dev, fifo->pipe,
1258                               context_iso_urb->buffer, num_isoc_packets,
1259                               fifo->usb_packet_maxlen, fifo->intervall,
1260                               (usb_complete_t)tx_iso_complete, urb->context);
1261                 memset(context_iso_urb->buffer, 0,
1262                        sizeof(context_iso_urb->buffer));
1263                 frame_complete = 0;
1264
1265                 for (k = 0; k < num_isoc_packets; ++k) {
1266                         /* analyze tx success of previous ISO packets */
1267                         if (debug & DBG_HFC_URB_ERROR) {
1268                                 errcode = urb->iso_frame_desc[k].status;
1269                                 if (errcode) {
1270                                         printk(KERN_DEBUG "%s: %s: "
1271                                             "ISO packet %i, status: %i\n",
1272                                              hw->name, __func__, k, errcode);
1273                                 }
1274                         }
1275
1276                         /* Generate next ISO Packets */
1277                         if (tx_skb)
1278                                 remain = tx_skb->len - *tx_idx;
1279                         else
1280                                 remain = 0;
1281
1282                         if (remain > 0) {
1283                                 fifo->bit_line -= sink;
1284                                 current_len = (0 - fifo->bit_line) / 8;
1285                                 if (current_len > 14)
1286                                         current_len = 14;
1287                                 if (current_len < 0)
1288                                         current_len = 0;
1289                                 if (remain < current_len)
1290                                         current_len = remain;
1291
1292                                 /* how much bit do we put on the line? */
1293                                 fifo->bit_line += current_len * 8;
1294
1295                                 context_iso_urb->buffer[tx_offset] = 0;
1296                                 if (current_len == remain) {
1297                                         if (hdlc) {
1298                                                 /* signal frame completion */
1299                                                 context_iso_urb->
1300                                                     buffer[tx_offset] = 1;
1301                                                 /* add 2 byte flags and 16bit
1302                                                  * CRC at end of ISDN frame */
1303                                                 fifo->bit_line += 32;
1304                                         }
1305                                         frame_complete = 1;
1306                                 }
1307
1308                                 /* copy tx data to iso-urb buffer */
1309                                 memcpy(context_iso_urb->buffer + tx_offset + 1,
1310                                        (tx_skb->data + *tx_idx), current_len);
1311                                 *tx_idx += current_len;
1312
1313                                 urb->iso_frame_desc[k].offset = tx_offset;
1314                                 urb->iso_frame_desc[k].length = current_len + 1;
1315
1316                                 /* USB data log for every D ISO out */
1317                                 if ((fifon == HFCUSB_D_RX) &&
1318                                     (debug & DBG_HFC_USB_VERBOSE)) {
1319                                         printk(KERN_DEBUG
1320                                             "%s: %s (%d/%d) offs(%d) len(%d) ",
1321                                             hw->name, __func__,
1322                                             k, num_isoc_packets-1,
1323                                             urb->iso_frame_desc[k].offset,
1324                                             urb->iso_frame_desc[k].length);
1325
1326                                         for (i = urb->iso_frame_desc[k].offset;
1327                                              i < (urb->iso_frame_desc[k].offset
1328                                              + urb->iso_frame_desc[k].length);
1329                                              i++)
1330                                                 printk("%x ",
1331                                                     context_iso_urb->buffer[i]);
1332
1333                                         printk(" skb->len(%i) tx-idx(%d)\n",
1334                                             tx_skb->len, *tx_idx);
1335                                 }
1336
1337                                 tx_offset += (current_len + 1);
1338                         } else {
1339                                 urb->iso_frame_desc[k].offset = tx_offset++;
1340                                 urb->iso_frame_desc[k].length = 1;
1341                                 /* we lower data margin every msec */
1342                                 fifo->bit_line -= sink;
1343                                 if (fifo->bit_line < BITLINE_INF)
1344                                         fifo->bit_line = BITLINE_INF;
1345                         }
1346
1347                         if (frame_complete) {
1348                                 frame_complete = 0;
1349
1350                                 if (debug & DBG_HFC_FIFO_VERBOSE) {
1351                                         printk(KERN_DEBUG  "%s: %s: "
1352                                             "fifon(%i) new TX len(%i): ",
1353                                             hw->name, __func__,
1354                                             fifon, tx_skb->len);
1355                                         i = 0;
1356                                         while (i < tx_skb->len)
1357                                                 printk("%02x ",
1358                                                     tx_skb->data[i++]);
1359                                         printk("\n");
1360                                 }
1361
1362                                 dev_kfree_skb(tx_skb);
1363                                 tx_skb = NULL;
1364                                 if (fifo->dch && get_next_dframe(fifo->dch))
1365                                         tx_skb = fifo->dch->tx_skb;
1366                                 else if (fifo->bch &&
1367                                     get_next_bframe(fifo->bch)) {
1368                                         if (test_bit(FLG_TRANSPARENT,
1369                                             &fifo->bch->Flags))
1370                                                 confirm_Bsend(fifo->bch);
1371                                         tx_skb = fifo->bch->tx_skb;
1372                                 }
1373                         }
1374                 }
1375                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
1376                 if (errcode < 0) {
1377                         if (debug & DEBUG_HW)
1378                                 printk(KERN_DEBUG
1379                                     "%s: %s: error submitting ISO URB: %d \n",
1380                                     hw->name, __func__, errcode);
1381                 }
1382
1383                 /*
1384                  * abuse DChannel tx iso completion to trigger NT mode state
1385                  * changes tx_iso_complete is assumed to be called every
1386                  * fifo->intervall (ms)
1387                  */
1388                 if ((fifon == HFCUSB_D_TX) && (hw->protocol == ISDN_P_NT_S0)
1389                     && (hw->timers & NT_ACTIVATION_TIMER)) {
1390                         if ((--hw->nt_timer) < 0)
1391                                 schedule_event(&hw->dch, FLG_PHCHANGE);
1392                 }
1393
1394         } else {
1395                 if (status && (debug & DBG_HFC_URB_ERROR))
1396                         printk(KERN_DEBUG  "%s: %s: urb->status %s (%i)"
1397                             "fifonum=%d\n",
1398                             hw->name, __func__,
1399                             symbolic(urb_errlist, status), status, fifon);
1400         }
1401         spin_unlock(&hw->lock);
1402 }
1403
1404 /*
1405  * allocs urbs and start isoc transfer with two pending urbs to avoid
1406  * gaps in the transfer chain
1407  */
1408 static int
1409 start_isoc_chain(struct usb_fifo *fifo, int num_packets_per_urb,
1410                  usb_complete_t complete, int packet_size)
1411 {
1412         struct hfcsusb *hw = fifo->hw;
1413         int i, k, errcode;
1414
1415         if (debug)
1416                 printk(KERN_DEBUG "%s: %s: fifo %i\n",
1417                     hw->name, __func__, fifo->fifonum);
1418
1419         /* allocate Memory for Iso out Urbs */
1420         for (i = 0; i < 2; i++) {
1421                 if (!(fifo->iso[i].urb)) {
1422                         fifo->iso[i].urb =
1423                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
1424                         if (!(fifo->iso[i].urb)) {
1425                                 printk(KERN_DEBUG
1426                                     "%s: %s: alloc urb for fifo %i failed",
1427                                     hw->name, __func__, fifo->fifonum);
1428                         }
1429                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
1430                         fifo->iso[i].indx = i;
1431
1432                         /* Init the first iso */
1433                         if (ISO_BUFFER_SIZE >=
1434                             (fifo->usb_packet_maxlen *
1435                              num_packets_per_urb)) {
1436                                 fill_isoc_urb(fifo->iso[i].urb,
1437                                     fifo->hw->dev, fifo->pipe,
1438                                     fifo->iso[i].buffer,
1439                                     num_packets_per_urb,
1440                                     fifo->usb_packet_maxlen,
1441                                     fifo->intervall, complete,
1442                                     &fifo->iso[i]);
1443                                 memset(fifo->iso[i].buffer, 0,
1444                                        sizeof(fifo->iso[i].buffer));
1445
1446                                 for (k = 0; k < num_packets_per_urb; k++) {
1447                                         fifo->iso[i].urb->
1448                                             iso_frame_desc[k].offset =
1449                                             k * packet_size;
1450                                         fifo->iso[i].urb->
1451                                             iso_frame_desc[k].length =
1452                                             packet_size;
1453                                 }
1454                         } else {
1455                                 printk(KERN_DEBUG
1456                                     "%s: %s: ISO Buffer size to small!\n",
1457                                     hw->name, __func__);
1458                         }
1459                 }
1460                 fifo->bit_line = BITLINE_INF;
1461
1462                 errcode = usb_submit_urb(fifo->iso[i].urb, GFP_KERNEL);
1463                 fifo->active = (errcode >= 0) ? 1 : 0;
1464                 fifo->stop_gracefull = 0;
1465                 if (errcode < 0) {
1466                         printk(KERN_DEBUG "%s: %s: %s URB nr:%d\n",
1467                             hw->name, __func__,
1468                             symbolic(urb_errlist, errcode), i);
1469                 }
1470         }
1471         return fifo->active;
1472 }
1473
1474 static void
1475 stop_iso_gracefull(struct usb_fifo *fifo)
1476 {
1477         struct hfcsusb *hw = fifo->hw;
1478         int i, timeout;
1479         u_long flags;
1480
1481         for (i = 0; i < 2; i++) {
1482                 spin_lock_irqsave(&hw->lock, flags);
1483                 if (debug)
1484                         printk(KERN_DEBUG "%s: %s for fifo %i.%i\n",
1485                                hw->name, __func__, fifo->fifonum, i);
1486                 fifo->stop_gracefull = 1;
1487                 spin_unlock_irqrestore(&hw->lock, flags);
1488         }
1489
1490         for (i = 0; i < 2; i++) {
1491                 timeout = 3;
1492                 while (fifo->stop_gracefull && timeout--)
1493                         schedule_timeout_interruptible((HZ/1000)*16);
1494                 if (debug && fifo->stop_gracefull)
1495                         printk(KERN_DEBUG "%s: ERROR %s for fifo %i.%i\n",
1496                                 hw->name, __func__, fifo->fifonum, i);
1497         }
1498 }
1499
1500 static void
1501 stop_int_gracefull(struct usb_fifo *fifo)
1502 {
1503         struct hfcsusb *hw = fifo->hw;
1504         int timeout;
1505         u_long flags;
1506
1507         spin_lock_irqsave(&hw->lock, flags);
1508         if (debug)
1509                 printk(KERN_DEBUG "%s: %s for fifo %i\n",
1510                        hw->name, __func__, fifo->fifonum);
1511         fifo->stop_gracefull = 1;
1512         spin_unlock_irqrestore(&hw->lock, flags);
1513
1514         timeout = 3;
1515         while (fifo->stop_gracefull && timeout--)
1516                 schedule_timeout_interruptible((HZ/1000)*3);
1517         if (debug && fifo->stop_gracefull)
1518                 printk(KERN_DEBUG "%s: ERROR %s for fifo %i\n",
1519                        hw->name, __func__, fifo->fifonum);
1520 }
1521
1522 /* start the interrupt transfer for the given fifo */
1523 static void
1524 start_int_fifo(struct usb_fifo *fifo)
1525 {
1526         struct hfcsusb *hw = fifo->hw;
1527         int errcode;
1528
1529         if (debug)
1530                 printk(KERN_DEBUG "%s: %s: INT IN fifo:%d\n",
1531                     hw->name, __func__, fifo->fifonum);
1532
1533         if (!fifo->urb) {
1534                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
1535                 if (!fifo->urb)
1536                         return;
1537         }
1538         usb_fill_int_urb(fifo->urb, fifo->hw->dev, fifo->pipe,
1539             fifo->buffer, fifo->usb_packet_maxlen,
1540             (usb_complete_t)rx_int_complete, fifo, fifo->intervall);
1541         fifo->active = 1;
1542         fifo->stop_gracefull = 0;
1543         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
1544         if (errcode) {
1545                 printk(KERN_DEBUG "%s: %s: submit URB: status:%i\n",
1546                     hw->name, __func__, errcode);
1547                 fifo->active = 0;
1548         }
1549 }
1550
1551 static void
1552 setPortMode(struct hfcsusb *hw)
1553 {
1554         if (debug & DEBUG_HW)
1555                 printk(KERN_DEBUG "%s: %s %s\n", hw->name, __func__,
1556                    (hw->protocol == ISDN_P_TE_S0) ? "TE" : "NT");
1557
1558         if (hw->protocol == ISDN_P_TE_S0) {
1559                 write_reg(hw, HFCUSB_SCTRL, 0x40);
1560                 write_reg(hw, HFCUSB_SCTRL_E, 0x00);
1561                 write_reg(hw, HFCUSB_CLKDEL, CLKDEL_TE);
1562                 write_reg(hw, HFCUSB_STATES, 3 | 0x10);
1563                 write_reg(hw, HFCUSB_STATES, 3);
1564         } else {
1565                 write_reg(hw, HFCUSB_SCTRL, 0x44);
1566                 write_reg(hw, HFCUSB_SCTRL_E, 0x09);
1567                 write_reg(hw, HFCUSB_CLKDEL, CLKDEL_NT);
1568                 write_reg(hw, HFCUSB_STATES, 1 | 0x10);
1569                 write_reg(hw, HFCUSB_STATES, 1);
1570         }
1571 }
1572
1573 static void
1574 reset_hfcsusb(struct hfcsusb *hw)
1575 {
1576         struct usb_fifo *fifo;
1577         int i;
1578
1579         if (debug & DEBUG_HW)
1580                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1581
1582         /* do Chip reset */
1583         write_reg(hw, HFCUSB_CIRM, 8);
1584
1585         /* aux = output, reset off */
1586         write_reg(hw, HFCUSB_CIRM, 0x10);
1587
1588         /* set USB_SIZE to match the wMaxPacketSize for INT or BULK transfers */
1589         write_reg(hw, HFCUSB_USB_SIZE, (hw->packet_size / 8) |
1590             ((hw->packet_size / 8) << 4));
1591
1592         /* set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers */
1593         write_reg(hw, HFCUSB_USB_SIZE_I, hw->iso_packet_size);
1594
1595         /* enable PCM/GCI master mode */
1596         write_reg(hw, HFCUSB_MST_MODE1, 0);     /* set default values */
1597         write_reg(hw, HFCUSB_MST_MODE0, 1);     /* enable master mode */
1598
1599         /* init the fifos */
1600         write_reg(hw, HFCUSB_F_THRES,
1601             (HFCUSB_TX_THRESHOLD / 8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1602
1603         fifo = hw->fifos;
1604         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1605                 write_reg(hw, HFCUSB_FIFO, i);  /* select the desired fifo */
1606                 fifo[i].max_size =
1607                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1608                 fifo[i].last_urblen = 0;
1609
1610                 /* set 2 bit for D- & E-channel */
1611                 write_reg(hw, HFCUSB_HDLC_PAR, ((i <= HFCUSB_B2_RX) ? 0 : 2));
1612
1613                 /* enable all fifos */
1614                 if (i == HFCUSB_D_TX)
1615                         write_reg(hw, HFCUSB_CON_HDLC,
1616                             (hw->protocol == ISDN_P_NT_S0) ? 0x08 : 0x09);
1617                 else
1618                         write_reg(hw, HFCUSB_CON_HDLC, 0x08);
1619                 write_reg(hw, HFCUSB_INC_RES_F, 2); /* reset the fifo */
1620         }
1621
1622         write_reg(hw, HFCUSB_SCTRL_R, 0); /* disable both B receivers */
1623         handle_led(hw, LED_POWER_ON);
1624 }
1625
1626 /* start USB data pipes dependand on device's endpoint configuration */
1627 static void
1628 hfcsusb_start_endpoint(struct hfcsusb *hw, int channel)
1629 {
1630         /* quick check if endpoint already running */
1631         if ((channel == HFC_CHAN_D) && (hw->fifos[HFCUSB_D_RX].active))
1632                 return;
1633         if ((channel == HFC_CHAN_B1) && (hw->fifos[HFCUSB_B1_RX].active))
1634                 return;
1635         if ((channel == HFC_CHAN_B2) && (hw->fifos[HFCUSB_B2_RX].active))
1636                 return;
1637         if ((channel == HFC_CHAN_E) && (hw->fifos[HFCUSB_PCM_RX].active))
1638                 return;
1639
1640         /* start rx endpoints using USB INT IN method */
1641         if (hw->cfg_used == CNF_3INT3ISO || hw->cfg_used == CNF_4INT3ISO)
1642                 start_int_fifo(hw->fifos + channel*2 + 1);
1643
1644         /* start rx endpoints using USB ISO IN method */
1645         if (hw->cfg_used == CNF_3ISO3ISO || hw->cfg_used == CNF_4ISO3ISO) {
1646                 switch (channel) {
1647                 case HFC_CHAN_D:
1648                         start_isoc_chain(hw->fifos + HFCUSB_D_RX,
1649                                 ISOC_PACKETS_D,
1650                                 (usb_complete_t)rx_iso_complete,
1651                                 16);
1652                         break;
1653                 case HFC_CHAN_E:
1654                         start_isoc_chain(hw->fifos + HFCUSB_PCM_RX,
1655                                 ISOC_PACKETS_D,
1656                                 (usb_complete_t)rx_iso_complete,
1657                                 16);
1658                         break;
1659                 case HFC_CHAN_B1:
1660                         start_isoc_chain(hw->fifos + HFCUSB_B1_RX,
1661                                 ISOC_PACKETS_B,
1662                                 (usb_complete_t)rx_iso_complete,
1663                                 16);
1664                         break;
1665                 case HFC_CHAN_B2:
1666                         start_isoc_chain(hw->fifos + HFCUSB_B2_RX,
1667                                 ISOC_PACKETS_B,
1668                                 (usb_complete_t)rx_iso_complete,
1669                                 16);
1670                         break;
1671                 }
1672         }
1673
1674         /* start tx endpoints using USB ISO OUT method */
1675         switch (channel) {
1676         case HFC_CHAN_D:
1677                 start_isoc_chain(hw->fifos + HFCUSB_D_TX,
1678                         ISOC_PACKETS_B,
1679                         (usb_complete_t)tx_iso_complete, 1);
1680                 break;
1681         case HFC_CHAN_B1:
1682                 start_isoc_chain(hw->fifos + HFCUSB_B1_TX,
1683                         ISOC_PACKETS_D,
1684                         (usb_complete_t)tx_iso_complete, 1);
1685                 break;
1686         case HFC_CHAN_B2:
1687                 start_isoc_chain(hw->fifos + HFCUSB_B2_TX,
1688                         ISOC_PACKETS_B,
1689                         (usb_complete_t)tx_iso_complete, 1);
1690                 break;
1691         }
1692 }
1693
1694 /* stop USB data pipes dependand on device's endpoint configuration */
1695 static void
1696 hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel)
1697 {
1698         /* quick check if endpoint currently running */
1699         if ((channel == HFC_CHAN_D) && (!hw->fifos[HFCUSB_D_RX].active))
1700                 return;
1701         if ((channel == HFC_CHAN_B1) && (!hw->fifos[HFCUSB_B1_RX].active))
1702                 return;
1703         if ((channel == HFC_CHAN_B2) && (!hw->fifos[HFCUSB_B2_RX].active))
1704                 return;
1705         if ((channel == HFC_CHAN_E) && (!hw->fifos[HFCUSB_PCM_RX].active))
1706                 return;
1707
1708         /* rx endpoints using USB INT IN method */
1709         if (hw->cfg_used == CNF_3INT3ISO || hw->cfg_used == CNF_4INT3ISO)
1710                 stop_int_gracefull(hw->fifos + channel*2 + 1);
1711
1712         /* rx endpoints using USB ISO IN method */
1713         if (hw->cfg_used == CNF_3ISO3ISO || hw->cfg_used == CNF_4ISO3ISO)
1714                 stop_iso_gracefull(hw->fifos + channel*2 + 1);
1715
1716         /* tx endpoints using USB ISO OUT method */
1717         if (channel != HFC_CHAN_E)
1718                 stop_iso_gracefull(hw->fifos + channel*2);
1719 }
1720
1721
1722 /* Hardware Initialization */
1723 static int
1724 setup_hfcsusb(struct hfcsusb *hw)
1725 {
1726         int err;
1727         u_char b;
1728
1729         if (debug & DBG_HFC_CALL_TRACE)
1730                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1731
1732         /* check the chip id */
1733         if (read_reg_atomic(hw, HFCUSB_CHIP_ID, &b) != 1) {
1734                 printk(KERN_DEBUG "%s: %s: cannot read chip id\n",
1735                     hw->name, __func__);
1736                 return 1;
1737         }
1738         if (b != HFCUSB_CHIPID) {
1739                 printk(KERN_DEBUG "%s: %s: Invalid chip id 0x%02x\n",
1740                     hw->name, __func__, b);
1741                 return 1;
1742         }
1743
1744         /* first set the needed config, interface and alternate */
1745         err = usb_set_interface(hw->dev, hw->if_used, hw->alt_used);
1746
1747         hw->led_state = 0;
1748
1749         /* init the background machinery for control requests */
1750         hw->ctrl_read.bRequestType = 0xc0;
1751         hw->ctrl_read.bRequest = 1;
1752         hw->ctrl_read.wLength = cpu_to_le16(1);
1753         hw->ctrl_write.bRequestType = 0x40;
1754         hw->ctrl_write.bRequest = 0;
1755         hw->ctrl_write.wLength = 0;
1756         usb_fill_control_urb(hw->ctrl_urb, hw->dev, hw->ctrl_out_pipe,
1757             (u_char *)&hw->ctrl_write, NULL, 0,
1758             (usb_complete_t)ctrl_complete, hw);
1759
1760         reset_hfcsusb(hw);
1761         return 0;
1762 }
1763
1764 static void
1765 release_hw(struct hfcsusb *hw)
1766 {
1767         if (debug & DBG_HFC_CALL_TRACE)
1768                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1769
1770         /*
1771          * stop all endpoints gracefully
1772          * TODO: mISDN_core should generate CLOSE_CHANNEL
1773          *       signals after calling mISDN_unregister_device()
1774          */
1775         hfcsusb_stop_endpoint(hw, HFC_CHAN_D);
1776         hfcsusb_stop_endpoint(hw, HFC_CHAN_B1);
1777         hfcsusb_stop_endpoint(hw, HFC_CHAN_B2);
1778         if (hw->fifos[HFCUSB_PCM_RX].pipe)
1779                 hfcsusb_stop_endpoint(hw, HFC_CHAN_E);
1780         if (hw->protocol == ISDN_P_TE_S0)
1781                 l1_event(hw->dch.l1, CLOSE_CHANNEL);
1782
1783         mISDN_unregister_device(&hw->dch.dev);
1784         mISDN_freebchannel(&hw->bch[1]);
1785         mISDN_freebchannel(&hw->bch[0]);
1786         mISDN_freedchannel(&hw->dch);
1787
1788         if (hw->ctrl_urb) {
1789                 usb_kill_urb(hw->ctrl_urb);
1790                 usb_free_urb(hw->ctrl_urb);
1791                 hw->ctrl_urb = NULL;
1792         }
1793
1794         if (hw->intf)
1795                 usb_set_intfdata(hw->intf, NULL);
1796         list_del(&hw->list);
1797         kfree(hw);
1798         hw = NULL;
1799 }
1800
1801 static void
1802 deactivate_bchannel(struct bchannel *bch)
1803 {
1804         struct hfcsusb *hw = bch->hw;
1805         u_long flags;
1806
1807         if (bch->debug & DEBUG_HW)
1808                 printk(KERN_DEBUG "%s: %s: bch->nr(%i)\n",
1809                     hw->name, __func__, bch->nr);
1810
1811         spin_lock_irqsave(&hw->lock, flags);
1812         mISDN_clear_bchannel(bch);
1813         spin_unlock_irqrestore(&hw->lock, flags);
1814         hfcsusb_setup_bch(bch, ISDN_P_NONE);
1815         hfcsusb_stop_endpoint(hw, bch->nr);
1816 }
1817
1818 /*
1819  * Layer 1 B-channel hardware access
1820  */
1821 static int
1822 hfc_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1823 {
1824         struct bchannel *bch = container_of(ch, struct bchannel, ch);
1825         int             ret = -EINVAL;
1826
1827         if (bch->debug & DEBUG_HW)
1828                 printk(KERN_DEBUG "%s: cmd:%x %p\n", __func__, cmd, arg);
1829
1830         switch (cmd) {
1831         case HW_TESTRX_RAW:
1832         case HW_TESTRX_HDLC:
1833         case HW_TESTRX_OFF:
1834                 ret = -EINVAL;
1835                 break;
1836
1837         case CLOSE_CHANNEL:
1838                 test_and_clear_bit(FLG_OPEN, &bch->Flags);
1839                 if (test_bit(FLG_ACTIVE, &bch->Flags))
1840                         deactivate_bchannel(bch);
1841                 ch->protocol = ISDN_P_NONE;
1842                 ch->peer = NULL;
1843                 module_put(THIS_MODULE);
1844                 ret = 0;
1845                 break;
1846         case CONTROL_CHANNEL:
1847                 ret = channel_bctrl(bch, arg);
1848                 break;
1849         default:
1850                 printk(KERN_WARNING "%s: unknown prim(%x)\n",
1851                         __func__, cmd);
1852         }
1853         return ret;
1854 }
1855
1856 static int
1857 setup_instance(struct hfcsusb *hw, struct device *parent)
1858 {
1859         u_long  flags;
1860         int     err, i;
1861
1862         if (debug & DBG_HFC_CALL_TRACE)
1863                 printk(KERN_DEBUG "%s: %s\n", hw->name, __func__);
1864
1865         spin_lock_init(&hw->ctrl_lock);
1866         spin_lock_init(&hw->lock);
1867
1868         mISDN_initdchannel(&hw->dch, MAX_DFRAME_LEN_L1, ph_state);
1869         hw->dch.debug = debug & 0xFFFF;
1870         hw->dch.hw = hw;
1871         hw->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0);
1872         hw->dch.dev.D.send = hfcusb_l2l1D;
1873         hw->dch.dev.D.ctrl = hfc_dctrl;
1874
1875         /* enable E-Channel logging */
1876         if (hw->fifos[HFCUSB_PCM_RX].pipe)
1877                 mISDN_initdchannel(&hw->ech, MAX_DFRAME_LEN_L1, NULL);
1878
1879         hw->dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
1880             (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
1881         hw->dch.dev.nrbchan = 2;
1882         for (i = 0; i < 2; i++) {
1883                 hw->bch[i].nr = i + 1;
1884                 set_channelmap(i + 1, hw->dch.dev.channelmap);
1885                 hw->bch[i].debug = debug;
1886                 mISDN_initbchannel(&hw->bch[i], MAX_DATA_MEM);
1887                 hw->bch[i].hw = hw;
1888                 hw->bch[i].ch.send = hfcusb_l2l1B;
1889                 hw->bch[i].ch.ctrl = hfc_bctrl;
1890                 hw->bch[i].ch.nr = i + 1;
1891                 list_add(&hw->bch[i].ch.list, &hw->dch.dev.bchannels);
1892         }
1893
1894         hw->fifos[HFCUSB_B1_TX].bch = &hw->bch[0];
1895         hw->fifos[HFCUSB_B1_RX].bch = &hw->bch[0];
1896         hw->fifos[HFCUSB_B2_TX].bch = &hw->bch[1];
1897         hw->fifos[HFCUSB_B2_RX].bch = &hw->bch[1];
1898         hw->fifos[HFCUSB_D_TX].dch = &hw->dch;
1899         hw->fifos[HFCUSB_D_RX].dch = &hw->dch;
1900         hw->fifos[HFCUSB_PCM_RX].ech = &hw->ech;
1901         hw->fifos[HFCUSB_PCM_TX].ech = &hw->ech;
1902
1903         err = setup_hfcsusb(hw);
1904         if (err)
1905                 goto out;
1906
1907         snprintf(hw->name, MISDN_MAX_IDLEN - 1, "%s.%d", DRIVER_NAME,
1908             hfcsusb_cnt + 1);
1909         printk(KERN_INFO "%s: registered as '%s'\n",
1910             DRIVER_NAME, hw->name);
1911
1912         err = mISDN_register_device(&hw->dch.dev, parent, hw->name);
1913         if (err)
1914                 goto out;
1915
1916         hfcsusb_cnt++;
1917         write_lock_irqsave(&HFClock, flags);
1918         list_add_tail(&hw->list, &HFClist);
1919         write_unlock_irqrestore(&HFClock, flags);
1920         return 0;
1921
1922 out:
1923         mISDN_freebchannel(&hw->bch[1]);
1924         mISDN_freebchannel(&hw->bch[0]);
1925         mISDN_freedchannel(&hw->dch);
1926         kfree(hw);
1927         return err;
1928 }
1929
1930 static int
1931 hfcsusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1932 {
1933         struct hfcsusb                  *hw;
1934         struct usb_device               *dev = interface_to_usbdev(intf);
1935         struct usb_host_interface       *iface = intf->cur_altsetting;
1936         struct usb_host_interface       *iface_used = NULL;
1937         struct usb_host_endpoint        *ep;
1938         struct hfcsusb_vdata            *driver_info;
1939         int ifnum = iface->desc.bInterfaceNumber, i, idx, alt_idx,
1940             probe_alt_setting, vend_idx, cfg_used, *vcf, attr, cfg_found,
1941             ep_addr, cmptbl[16], small_match, iso_packet_size, packet_size,
1942             alt_used = 0;
1943
1944         vend_idx = 0xffff;
1945         for (i = 0; hfcsusb_idtab[i].idVendor; i++) {
1946                 if ((le16_to_cpu(dev->descriptor.idVendor)
1947                        == hfcsusb_idtab[i].idVendor) &&
1948                     (le16_to_cpu(dev->descriptor.idProduct)
1949                        == hfcsusb_idtab[i].idProduct)) {
1950                         vend_idx = i;
1951                         continue;
1952                 }
1953         }
1954
1955         printk(KERN_DEBUG
1956             "%s: interface(%d) actalt(%d) minor(%d) vend_idx(%d)\n",
1957             __func__, ifnum, iface->desc.bAlternateSetting,
1958             intf->minor, vend_idx);
1959
1960         if (vend_idx == 0xffff) {
1961                 printk(KERN_WARNING
1962                     "%s: no valid vendor found in USB descriptor\n",
1963                     __func__);
1964                 return -EIO;
1965         }
1966         /* if vendor and product ID is OK, start probing alternate settings */
1967         alt_idx = 0;
1968         small_match = -1;
1969
1970         /* default settings */
1971         iso_packet_size = 16;
1972         packet_size = 64;
1973
1974         while (alt_idx < intf->num_altsetting) {
1975                 iface = intf->altsetting + alt_idx;
1976                 probe_alt_setting = iface->desc.bAlternateSetting;
1977                 cfg_used = 0;
1978
1979                 while (validconf[cfg_used][0]) {
1980                         cfg_found = 1;
1981                         vcf = validconf[cfg_used];
1982                         ep = iface->endpoint;
1983                         memcpy(cmptbl, vcf, 16 * sizeof(int));
1984
1985                         /* check for all endpoints in this alternate setting */
1986                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1987                                 ep_addr = ep->desc.bEndpointAddress;
1988
1989                                 /* get endpoint base */
1990                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1991                                 if (ep_addr & 0x80)
1992                                         idx++;
1993                                 attr = ep->desc.bmAttributes;
1994
1995                                 if (cmptbl[idx] != EP_NOP) {
1996                                         if (cmptbl[idx] == EP_NUL)
1997                                                 cfg_found = 0;
1998                                         if (attr == USB_ENDPOINT_XFER_INT
1999                                                 && cmptbl[idx] == EP_INT)
2000                                                 cmptbl[idx] = EP_NUL;
2001                                         if (attr == USB_ENDPOINT_XFER_BULK
2002                                                 && cmptbl[idx] == EP_BLK)
2003                                                 cmptbl[idx] = EP_NUL;
2004                                         if (attr == USB_ENDPOINT_XFER_ISOC
2005                                                 && cmptbl[idx] == EP_ISO)
2006                                                 cmptbl[idx] = EP_NUL;
2007
2008                                         if (attr == USB_ENDPOINT_XFER_INT &&
2009                                                 ep->desc.bInterval < vcf[17]) {
2010                                                 cfg_found = 0;
2011                                         }
2012                                 }
2013                                 ep++;
2014                         }
2015
2016                         for (i = 0; i < 16; i++)
2017                                 if (cmptbl[i] != EP_NOP && cmptbl[i] != EP_NUL)
2018                                         cfg_found = 0;
2019
2020                         if (cfg_found) {
2021                                 if (small_match < cfg_used) {
2022                                         small_match = cfg_used;
2023                                         alt_used = probe_alt_setting;
2024                                         iface_used = iface;
2025                                 }
2026                         }
2027                         cfg_used++;
2028                 }
2029                 alt_idx++;
2030         }       /* (alt_idx < intf->num_altsetting) */
2031
2032         /* not found a valid USB Ta Endpoint config */
2033         if (small_match == -1)
2034                 return -EIO;
2035
2036         iface = iface_used;
2037         hw = kzalloc(sizeof(struct hfcsusb), GFP_KERNEL);
2038         if (!hw)
2039                 return -ENOMEM; /* got no mem */
2040         snprintf(hw->name, MISDN_MAX_IDLEN - 1, "%s", DRIVER_NAME);
2041
2042         ep = iface->endpoint;
2043         vcf = validconf[small_match];
2044
2045         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2046                 struct usb_fifo *f;
2047
2048                 ep_addr = ep->desc.bEndpointAddress;
2049                 /* get endpoint base */
2050                 idx = ((ep_addr & 0x7f) - 1) * 2;
2051                 if (ep_addr & 0x80)
2052                         idx++;
2053                 f = &hw->fifos[idx & 7];
2054
2055                 /* init Endpoints */
2056                 if (vcf[idx] == EP_NOP || vcf[idx] == EP_NUL) {
2057                         ep++;
2058                         continue;
2059                 }
2060                 switch (ep->desc.bmAttributes) {
2061                 case USB_ENDPOINT_XFER_INT:
2062                         f->pipe = usb_rcvintpipe(dev,
2063                                 ep->desc.bEndpointAddress);
2064                         f->usb_transfer_mode = USB_INT;
2065                         packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2066                         break;
2067                 case USB_ENDPOINT_XFER_BULK:
2068                         if (ep_addr & 0x80)
2069                                 f->pipe = usb_rcvbulkpipe(dev,
2070                                         ep->desc.bEndpointAddress);
2071                         else
2072                                 f->pipe = usb_sndbulkpipe(dev,
2073                                         ep->desc.bEndpointAddress);
2074                         f->usb_transfer_mode = USB_BULK;
2075                         packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2076                         break;
2077                 case USB_ENDPOINT_XFER_ISOC:
2078                         if (ep_addr & 0x80)
2079                                 f->pipe = usb_rcvisocpipe(dev,
2080                                         ep->desc.bEndpointAddress);
2081                         else
2082                                 f->pipe = usb_sndisocpipe(dev,
2083                                         ep->desc.bEndpointAddress);
2084                         f->usb_transfer_mode = USB_ISOC;
2085                         iso_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
2086                         break;
2087                 default:
2088                         f->pipe = 0;
2089                 }
2090
2091                 if (f->pipe) {
2092                         f->fifonum = idx & 7;
2093                         f->hw = hw;
2094                         f->usb_packet_maxlen =
2095                             le16_to_cpu(ep->desc.wMaxPacketSize);
2096                         f->intervall = ep->desc.bInterval;
2097                 }
2098                 ep++;
2099         }
2100         hw->dev = dev; /* save device */
2101         hw->if_used = ifnum; /* save used interface */
2102         hw->alt_used = alt_used; /* and alternate config */
2103         hw->ctrl_paksize = dev->descriptor.bMaxPacketSize0; /* control size */
2104         hw->cfg_used = vcf[16]; /* store used config */
2105         hw->vend_idx = vend_idx; /* store found vendor */
2106         hw->packet_size = packet_size;
2107         hw->iso_packet_size = iso_packet_size;
2108
2109         /* create the control pipes needed for register access */
2110         hw->ctrl_in_pipe = usb_rcvctrlpipe(hw->dev, 0);
2111         hw->ctrl_out_pipe = usb_sndctrlpipe(hw->dev, 0);
2112         hw->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
2113
2114         driver_info =
2115                 (struct hfcsusb_vdata *)hfcsusb_idtab[vend_idx].driver_info;
2116         printk(KERN_DEBUG "%s: %s: detected \"%s\" (%s, if=%d alt=%d)\n",
2117             hw->name, __func__, driver_info->vend_name,
2118             conf_str[small_match], ifnum, alt_used);
2119
2120         if (setup_instance(hw, dev->dev.parent))
2121                 return -EIO;
2122
2123         hw->intf = intf;
2124         usb_set_intfdata(hw->intf, hw);
2125         return 0;
2126 }
2127
2128 /* function called when an active device is removed */
2129 static void
2130 hfcsusb_disconnect(struct usb_interface *intf)
2131 {
2132         struct hfcsusb *hw = usb_get_intfdata(intf);
2133         struct hfcsusb *next;
2134         int cnt = 0;
2135
2136         printk(KERN_INFO "%s: device disconnected\n", hw->name);
2137
2138         handle_led(hw, LED_POWER_OFF);
2139         release_hw(hw);
2140
2141         list_for_each_entry_safe(hw, next, &HFClist, list)
2142                 cnt++;
2143         if (!cnt)
2144                 hfcsusb_cnt = 0;
2145
2146         usb_set_intfdata(intf, NULL);
2147 }
2148
2149 static struct usb_driver hfcsusb_drv = {
2150         .name = DRIVER_NAME,
2151         .id_table = hfcsusb_idtab,
2152         .probe = hfcsusb_probe,
2153         .disconnect = hfcsusb_disconnect,
2154 };
2155
2156 static int __init
2157 hfcsusb_init(void)
2158 {
2159         printk(KERN_INFO DRIVER_NAME " driver Rev. %s debug(0x%x) poll(%i)\n",
2160             hfcsusb_rev, debug, poll);
2161
2162         if (usb_register(&hfcsusb_drv)) {
2163                 printk(KERN_INFO DRIVER_NAME
2164                     ": Unable to register hfcsusb module at usb stack\n");
2165                 return -ENODEV;
2166         }
2167
2168         return 0;
2169 }
2170
2171 static void __exit
2172 hfcsusb_cleanup(void)
2173 {
2174         if (debug & DBG_HFC_CALL_TRACE)
2175                 printk(KERN_INFO DRIVER_NAME ": %s\n", __func__);
2176
2177         /* unregister Hardware */
2178         usb_deregister(&hfcsusb_drv);   /* release our driver */
2179 }
2180
2181 module_init(hfcsusb_init);
2182 module_exit(hfcsusb_cleanup);