kernel/drivers/isdn/hardware/mISDN/hfcsusb.c

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