git.oblomov.eu Git - linux-2.6/blob - drivers/isdn/hisax/hfc_usb.c

   1 /*
   2  * hfc_usb.c
   3  *
   4  * $Id: hfc_usb.c,v 4.36 2005/04/08 09:55:13 martinb1 Exp $
   5  *
   6  * modular HiSax ISDN driver for Colognechip HFC-S USB chip
   7  *
   8  * Authors : Peter Sprenger  (sprenger@moving-bytes.de)
   9  *           Martin Bachem   (info@colognechip.com)
  10  *
  11  *           based on the first hfc_usb driver of
  12  *           Werner Cornelius (werner@isdn-development.de)
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  * See Version Histroy at the bottom of this file
  29  *
  30 */
  31
  32 #include <linux/types.h>
  33 #include <linux/stddef.h>
  34 #include <linux/timer.h>
  35 #include <linux/config.h>
  36 #include <linux/init.h>
  37 #include <linux/module.h>
  38 #include <linux/kernel_stat.h>
  39 #include <linux/usb.h>
  40 #include <linux/kernel.h>
  41 #include <linux/smp_lock.h>
  42 #include <linux/sched.h>
  43 #include "hisax.h"
  44 #include "hisax_if.h"
  45 #include "hfc_usb.h"
  46
  47 static const char *hfcusb_revision =
  48     "$Revision: 4.36 $ $Date: 2005/04/08 09:55:13 $ ";
  49
  50 /* Hisax debug support
  51 * use "modprobe debug=x" where x is bitfield of USB_DBG & ISDN_DBG
  52 */
  53 #ifdef CONFIG_HISAX_DEBUG
  54 #include <linux/moduleparam.h>
  55 #define __debug_variable hfc_debug
  56 #include "hisax_debug.h"
  57 static u_int debug;
  58 module_param(debug, uint, 0);
  59 static int hfc_debug;
  60 #endif
  61
  62 /* private vendor specific data */
  63 typedef struct {
  64         __u8 led_scheme;        // led display scheme
  65         signed short led_bits[8];       // array of 8 possible LED bitmask settings
  66         char *vend_name;        // device name
  67 } hfcsusb_vdata;
  68
  69 /****************************************/
  70 /* data defining the devices to be used */
  71 /****************************************/
  72 static struct usb_device_id hfcusb_idtab[] = {
  73         {
  74          USB_DEVICE(0x0959, 0x2bd0),
  75          .driver_info = (unsigned long) &((hfcsusb_vdata)
  76                           {LED_OFF, {4, 0, 2, 1},
  77                            "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
  78         },
  79         {
  80          USB_DEVICE(0x0675, 0x1688),
  81          .driver_info = (unsigned long) &((hfcsusb_vdata)
  82                           {LED_SCHEME1, {1, 2, 0, 0},
  83                            "DrayTek miniVigor 128 USB ISDN TA"}),
  84         },
  85         {
  86          USB_DEVICE(0x07b0, 0x0007),
  87          .driver_info = (unsigned long) &((hfcsusb_vdata)
  88                           {LED_SCHEME1, {0x80, -64, -32, -16},
  89                            "Billion tiny USB ISDN TA 128"}),
  90         },
  91         {
  92          USB_DEVICE(0x0742, 0x2008),
  93          .driver_info = (unsigned long) &((hfcsusb_vdata)
  94                           {LED_SCHEME1, {4, 0, 2, 1},
  95                            "Stollmann USB TA"}),
  96          },
  97         {
  98          USB_DEVICE(0x0742, 0x2009),
  99          .driver_info = (unsigned long) &((hfcsusb_vdata)
 100                           {LED_SCHEME1, {4, 0, 2, 1},
 101                            "Aceex USB ISDN TA"}),
 102          },
 103         {
 104          USB_DEVICE(0x0742, 0x200A),
 105          .driver_info = (unsigned long) &((hfcsusb_vdata)
 106                           {LED_SCHEME1, {4, 0, 2, 1},
 107                            "OEM USB ISDN TA"}),
 108          },
 109         {
 110          USB_DEVICE(0x08e3, 0x0301),
 111          .driver_info = (unsigned long) &((hfcsusb_vdata)
 112                           {LED_SCHEME1, {2, 0, 1, 4},
 113                            "Olitec USB RNIS"}),
 114          },
 115         {
 116          USB_DEVICE(0x07fa, 0x0846),
 117          .driver_info = (unsigned long) &((hfcsusb_vdata)
 118                           {LED_SCHEME1, {0x80, -64, -32, -16},
 119                            "Bewan Modem RNIS USB"}),
 120          },
 121         {
 122          USB_DEVICE(0x07fa, 0x0847),
 123          .driver_info = (unsigned long) &((hfcsusb_vdata)
 124                           {LED_SCHEME1, {0x80, -64, -32, -16},
 125                            "Djinn Numeris USB"}),
 126          },
 127         {
 128          USB_DEVICE(0x07b0, 0x0006),
 129          .driver_info = (unsigned long) &((hfcsusb_vdata)
 130                           {LED_SCHEME1, {0x80, -64, -32, -16},
 131                            "Twister ISDN TA"}),
 132          },
 133         { }
 134 };
 135
 136 /***************************************************************/
 137 /* structure defining input+output fifos (interrupt/bulk mode) */
 138 /***************************************************************/
 139 struct usb_fifo;                /* forward definition */
 140 typedef struct iso_urb_struct {
 141         struct urb *purb;
 142         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
 143         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
 144 } iso_urb_struct;
 145
 146
 147 struct hfcusb_data;             /* forward definition */
 148 typedef struct usb_fifo {
 149         int fifonum;            /* fifo index attached to this structure */
 150         int active;             /* fifo is currently active */
 151         struct hfcusb_data *hfc;        /* pointer to main structure */
 152         int pipe;               /* address of endpoint */
 153         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
 154         unsigned int max_size;  /* maximum size of receive/send packet */
 155         __u8 intervall;         /* interrupt interval */
 156         struct sk_buff *skbuff; /* actual used buffer */
 157         struct urb *urb;        /* transfer structure for usb routines */
 158         __u8 buffer[128];       /* buffer incoming/outgoing data */
 159         int bit_line;           /* how much bits are in the fifo? */
 160
 161         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
 162         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
 163         struct hisax_if *hif;   /* hisax interface */
 164         int delete_flg;         /* only delete skbuff once */
 165         int last_urblen;        /* remember length of last packet */
 166
 167 } usb_fifo;
 168
 169 /*********************************************/
 170 /* structure holding all data for one device */
 171 /*********************************************/
 172 typedef struct hfcusb_data {
 173         /* HiSax Interface for loadable Layer1 drivers */
 174         struct hisax_d_if d_if; /* see hisax_if.h */
 175         struct hisax_b_if b_if[2];      /* see hisax_if.h */
 176         int protocol;
 177
 178         struct usb_device *dev; /* our device */
 179         int if_used;            /* used interface number */
 180         int alt_used;           /* used alternate config */
 181         int ctrl_paksize;       /* control pipe packet size */
 182         int ctrl_in_pipe, ctrl_out_pipe;        /* handles for control pipe */
 183         int cfg_used;           /* configuration index used */
 184         int vend_idx;           /* vendor found */
 185         int b_mode[2];          /* B-channel mode */
 186         int l1_activated;       /* layer 1 activated */
 187         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
 188         int packet_size, iso_packet_size;
 189
 190         /* control pipe background handling */
 191         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
 192         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
 193         struct urb *ctrl_urb;   /* transfer structure for control channel */
 194
 195         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
 196         struct usb_ctrlrequest ctrl_read;       /* same for read request */
 197
 198         __u8 old_led_state, led_state, led_new_data, led_b_active;
 199
 200         volatile __u8 threshold_mask;   /* threshold actually reported */
 201         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
 202
 203         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
 204
 205         volatile __u8 l1_state; /* actual l1 state */
 206         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
 207         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
 208 } hfcusb_data;
 209
 210
 211 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
 212                              int finish);
 213
 214
 215 static inline const char *
 216 symbolic(struct hfcusb_symbolic_list list[], const int num)
 217 {
 218         int i;
 219         for (i = 0; list[i].name != NULL; i++)
 220                 if (list[i].num == num)
 221                         return (list[i].name);
 222         return "<unkown ERROR>";
 223 }
 224
 225
 226 /******************************************************/
 227 /* start next background transfer for control channel */
 228 /******************************************************/
 229 static void
 230 ctrl_start_transfer(hfcusb_data * hfc)
 231 {
 232         if (hfc->ctrl_cnt) {
 233                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
 234                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
 235                 hfc->ctrl_urb->transfer_buffer = NULL;
 236                 hfc->ctrl_urb->transfer_buffer_length = 0;
 237                 hfc->ctrl_write.wIndex =
 238                     hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg;
 239                 hfc->ctrl_write.wValue =
 240                     hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val;
 241
 242                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
 243         }
 244 }                               /* ctrl_start_transfer */
 245
 246 /************************************/
 247 /* queue a control transfer request */
 248 /* return 0 on success.             */
 249 /************************************/
 250 static int
 251 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
 252 {
 253         ctrl_buft *buf;
 254
 255         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 256                 return (1);     /* no space left */
 257         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
 258         buf->hfc_reg = reg;
 259         buf->reg_val = val;
 260         buf->action = action;
 261         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 262                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
 263         if (++hfc->ctrl_cnt == 1)
 264                 ctrl_start_transfer(hfc);
 265         return (0);
 266 }                               /* queue_control_request */
 267
 268 static int
 269 control_action_handler(hfcusb_data * hfc, int reg, int val, int action)
 270 {
 271         if (!action)
 272                 return (1);     /* no action defined */
 273         return (0);
 274 }
 275
 276 /***************************************************************/
 277 /* control completion routine handling background control cmds */
 278 /***************************************************************/
 279 static void
 280 ctrl_complete(struct urb *urb, struct pt_regs *regs)
 281 {
 282         hfcusb_data *hfc = (hfcusb_data *) urb->context;
 283         ctrl_buft *buf;
 284
 285         urb->dev = hfc->dev;
 286         if (hfc->ctrl_cnt) {
 287                 buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
 288                 control_action_handler(hfc, buf->hfc_reg, buf->reg_val,
 289                                        buf->action);
 290
 291                 hfc->ctrl_cnt--;        /* decrement actual count */
 292                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 293                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
 294
 295                 ctrl_start_transfer(hfc);       /* start next transfer */
 296         }
 297 }                               /* ctrl_complete */
 298
 299 /***************************************************/
 300 /* write led data to auxport & invert if necessary */
 301 /***************************************************/
 302 static void
 303 write_led(hfcusb_data * hfc, __u8 led_state)
 304 {
 305         if (led_state != hfc->old_led_state) {
 306                 hfc->old_led_state = led_state;
 307                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
 308         }
 309 }
 310
 311 /**************************/
 312 /* handle LED bits        */
 313 /**************************/
 314 static void
 315 set_led_bit(hfcusb_data * hfc, signed short led_bits, int unset)
 316 {
 317         if (unset) {
 318                 if (led_bits < 0)
 319                         hfc->led_state |= abs(led_bits);
 320                 else
 321                         hfc->led_state &= ~led_bits;
 322         } else {
 323                 if (led_bits < 0)
 324                         hfc->led_state &= ~abs(led_bits);
 325                 else
 326                         hfc->led_state |= led_bits;
 327         }
 328 }
 329
 330 /**************************/
 331 /* handle LED requests    */
 332 /**************************/
 333 static void
 334 handle_led(hfcusb_data * hfc, int event)
 335 {
 336         hfcsusb_vdata *driver_info =
 337             (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;
 338
 339         /* if no scheme -> no LED action */
 340         if (driver_info->led_scheme == LED_OFF)
 341                 return;
 342
 343         switch (event) {
 344                 case LED_POWER_ON:
 345                         set_led_bit(hfc, driver_info->led_bits[0],
 346                                     0);
 347                         set_led_bit(hfc, driver_info->led_bits[1],
 348                                     1);
 349                         set_led_bit(hfc, driver_info->led_bits[2],
 350                                     1);
 351                         set_led_bit(hfc, driver_info->led_bits[3],
 352                                     1);
 353                         break;
 354                 case LED_POWER_OFF:     /* no Power off handling */
 355                         break;
 356                 case LED_S0_ON:
 357                         set_led_bit(hfc, driver_info->led_bits[1],
 358                                     0);
 359                         break;
 360                 case LED_S0_OFF:
 361                         set_led_bit(hfc, driver_info->led_bits[1],
 362                                     1);
 363                         break;
 364                 case LED_B1_ON:
 365                         set_led_bit(hfc, driver_info->led_bits[2],
 366                                     0);
 367                         break;
 368                 case LED_B1_OFF:
 369                         set_led_bit(hfc, driver_info->led_bits[2],
 370                                     1);
 371                         break;
 372                 case LED_B2_ON:
 373                         set_led_bit(hfc, driver_info->led_bits[3],
 374                                     0);
 375                         break;
 376                 case LED_B2_OFF:
 377                         set_led_bit(hfc, driver_info->led_bits[3],
 378                                     1);
 379                         break;
 380         }
 381         write_led(hfc, hfc->led_state);
 382 }
 383
 384 /********************************/
 385 /* called when timer t3 expires */
 386 /********************************/
 387 static void
 388 l1_timer_expire_t3(hfcusb_data * hfc)
 389 {
 390         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 391                            NULL);
 392 #ifdef CONFIG_HISAX_DEBUG
 393         DBG(ISDN_DBG,
 394             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 395 #endif
 396         hfc->l1_activated = FALSE;
 397         handle_led(hfc, LED_S0_OFF);
 398         /* deactivate : */
 399         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 400         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 401 }
 402
 403 /********************************/
 404 /* called when timer t4 expires */
 405 /********************************/
 406 static void
 407 l1_timer_expire_t4(hfcusb_data * hfc)
 408 {
 409         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 410                            NULL);
 411 #ifdef CONFIG_HISAX_DEBUG
 412         DBG(ISDN_DBG,
 413             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 414 #endif
 415         hfc->l1_activated = FALSE;
 416         handle_led(hfc, LED_S0_OFF);
 417 }
 418
 419 /*****************************/
 420 /* handle S0 state changes   */
 421 /*****************************/
 422 static void
 423 state_handler(hfcusb_data * hfc, __u8 state)
 424 {
 425         __u8 old_state;
 426
 427         old_state = hfc->l1_state;
 428         if (state == old_state || state < 1 || state > 8)
 429                 return;
 430
 431 #ifdef CONFIG_HISAX_DEBUG
 432         DBG(ISDN_DBG, "HFC-S USB: new S0 state:%d old_state:%d", state,
 433             old_state);
 434 #endif
 435         if (state < 4 || state == 7 || state == 8) {
 436                 if (timer_pending(&hfc->t3_timer))
 437                         del_timer(&hfc->t3_timer);
 438 #ifdef CONFIG_HISAX_DEBUG
 439                 DBG(ISDN_DBG, "HFC-S USB: T3 deactivated");
 440 #endif
 441         }
 442         if (state >= 7) {
 443                 if (timer_pending(&hfc->t4_timer))
 444                         del_timer(&hfc->t4_timer);
 445 #ifdef CONFIG_HISAX_DEBUG
 446                 DBG(ISDN_DBG, "HFC-S USB: T4 deactivated");
 447 #endif
 448         }
 449
 450         if (state == 7 && !hfc->l1_activated) {
 451                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 452                                    PH_ACTIVATE | INDICATION, NULL);
 453 #ifdef CONFIG_HISAX_DEBUG
 454                 DBG(ISDN_DBG, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 455 #endif
 456                 hfc->l1_activated = TRUE;
 457                 handle_led(hfc, LED_S0_ON);
 458         } else if (state <= 3 /* && activated */ ) {
 459                 if (old_state == 7 || old_state == 8) {
 460 #ifdef CONFIG_HISAX_DEBUG
 461                         DBG(ISDN_DBG, "HFC-S USB: T4 activated");
 462 #endif
 463                         if (!timer_pending(&hfc->t4_timer)) {
 464                                 hfc->t4_timer.expires =
 465                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 466                                 add_timer(&hfc->t4_timer);
 467                         }
 468                 } else {
 469                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 470                                            PH_DEACTIVATE | INDICATION,
 471                                            NULL);
 472 #ifdef CONFIG_HISAX_DEBUG
 473                         DBG(ISDN_DBG,
 474                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 475 #endif
 476                         hfc->l1_activated = FALSE;
 477                         handle_led(hfc, LED_S0_OFF);
 478                 }
 479         }
 480         hfc->l1_state = state;
 481 }
 482
 483 /* prepare iso urb */
 484 static void
 485 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 486               void *buf, int num_packets, int packet_size, int interval,
 487               usb_complete_t complete, void *context)
 488 {
 489         int k;
 490
 491         spin_lock_init(&urb->lock);
 492         urb->dev = dev;
 493         urb->pipe = pipe;
 494         urb->complete = complete;
 495         urb->number_of_packets = num_packets;
 496         urb->transfer_buffer_length = packet_size * num_packets;
 497         urb->context = context;
 498         urb->transfer_buffer = buf;
 499         urb->transfer_flags = URB_ISO_ASAP;
 500         urb->actual_length = 0;
 501         urb->interval = interval;
 502         for (k = 0; k < num_packets; k++) {
 503                 urb->iso_frame_desc[k].offset = packet_size * k;
 504                 urb->iso_frame_desc[k].length = packet_size;
 505                 urb->iso_frame_desc[k].actual_length = 0;
 506         }
 507 }
 508
 509 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 510    gaps in the transfer chain */
 511 static int
 512 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
 513                  usb_complete_t complete, int packet_size)
 514 {
 515         int i, k, errcode;
 516
 517         printk(KERN_INFO "HFC-S USB: starting ISO-chain for Fifo %i\n",
 518                fifo->fifonum);
 519
 520         /* allocate Memory for Iso out Urbs */
 521         for (i = 0; i < 2; i++) {
 522                 if (!(fifo->iso[i].purb)) {
 523                         fifo->iso[i].purb =
 524                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 525                         if (!(fifo->iso[i].purb)) {
 526                                 printk(KERN_INFO
 527                                        "alloc urb for fifo %i failed!!!",
 528                                        fifo->fifonum);
 529                         }
 530                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 531
 532                         /* Init the first iso */
 533                         if (ISO_BUFFER_SIZE >=
 534                             (fifo->usb_packet_maxlen *
 535                              num_packets_per_urb)) {
 536                                 fill_isoc_urb(fifo->iso[i].purb,
 537                                               fifo->hfc->dev, fifo->pipe,
 538                                               fifo->iso[i].buffer,
 539                                               num_packets_per_urb,
 540                                               fifo->usb_packet_maxlen,
 541                                               fifo->intervall, complete,
 542                                               &fifo->iso[i]);
 543                                 memset(fifo->iso[i].buffer, 0,
 544                                        sizeof(fifo->iso[i].buffer));
 545                                 /* defining packet delimeters in fifo->buffer */
 546                                 for (k = 0; k < num_packets_per_urb; k++) {
 547                                         fifo->iso[i].purb->
 548                                             iso_frame_desc[k].offset =
 549                                             k * packet_size;
 550                                         fifo->iso[i].purb->
 551                                             iso_frame_desc[k].length =
 552                                             packet_size;
 553                                 }
 554                         } else {
 555                                 printk(KERN_INFO
 556                                        "HFC-S USB: ISO Buffer size to small!\n");
 557                         }
 558                 }
 559                 fifo->bit_line = BITLINE_INF;
 560
 561                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 562                 fifo->active = (errcode >= 0) ? 1 : 0;
 563                 if (errcode < 0) {
 564                         printk(KERN_INFO "HFC-S USB: %s  URB nr:%d\n",
 565                                symbolic(urb_errlist, errcode), i);
 566                 };
 567         }
 568         return (fifo->active);
 569 }
 570
 571 /* stops running iso chain and frees their pending urbs */
 572 static void
 573 stop_isoc_chain(usb_fifo * fifo)
 574 {
 575         int i;
 576
 577         for (i = 0; i < 2; i++) {
 578                 if (fifo->iso[i].purb) {
 579 #ifdef CONFIG_HISAX_DEBUG
 580                         DBG(USB_DBG,
 581                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 582                             fifo->fifonum, i);
 583 #endif
 584                         usb_unlink_urb(fifo->iso[i].purb);
 585                         usb_free_urb(fifo->iso[i].purb);
 586                         fifo->iso[i].purb = NULL;
 587                 }
 588         }
 589         if (fifo->urb) {
 590                 usb_unlink_urb(fifo->urb);
 591                 usb_free_urb(fifo->urb);
 592                 fifo->urb = NULL;
 593         }
 594         fifo->active = 0;
 595 }
 596
 597 /* defines how much ISO packets are handled in one URB */
 598 static int iso_packets[8] =
 599     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 600         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 601 };
 602
 603 /*****************************************************/
 604 /* transmit completion routine for all ISO tx fifos */
 605 /*****************************************************/
 606 static void
 607 tx_iso_complete(struct urb *urb, struct pt_regs *regs)
 608 {
 609         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 610         usb_fifo *fifo = context_iso_urb->owner_fifo;
 611         hfcusb_data *hfc = fifo->hfc;
 612         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 613             errcode;
 614         int frame_complete, transp_mode, fifon, status;
 615         __u8 threshbit;
 616         __u8 threshtable[8] = { 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80 };
 617
 618         fifon = fifo->fifonum;
 619         status = urb->status;
 620
 621         tx_offset = 0;
 622
 623         if (fifo->active && !status) {
 624                 transp_mode = 0;
 625                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 626                         transp_mode = TRUE;
 627
 628                 /* is FifoFull-threshold set for our channel? */
 629                 threshbit = threshtable[fifon] & hfc->threshold_mask;
 630                 num_isoc_packets = iso_packets[fifon];
 631
 632                 /* predict dataflow to avoid fifo overflow */
 633                 if (fifon >= HFCUSB_D_TX) {
 634                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 635                 } else {
 636                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 637                 }
 638                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 639                               context_iso_urb->buffer, num_isoc_packets,
 640                               fifo->usb_packet_maxlen, fifo->intervall,
 641                               tx_iso_complete, urb->context);
 642                 memset(context_iso_urb->buffer, 0,
 643                        sizeof(context_iso_urb->buffer));
 644                 frame_complete = FALSE;
 645                 /* Generate next Iso Packets */
 646                 for (k = 0; k < num_isoc_packets; ++k) {
 647                         if (fifo->skbuff) {
 648                                 len = fifo->skbuff->len;
 649                                 /* we lower data margin every msec */
 650                                 fifo->bit_line -= sink;
 651                                 current_len = (0 - fifo->bit_line) / 8;
 652                                 /* maximum 15 byte for every ISO packet makes our life easier */
 653                                 if (current_len > 14)
 654                                         current_len = 14;
 655                                 current_len =
 656                                     (len <=
 657                                      current_len) ? len : current_len;
 658                                 /* how much bit do we put on the line? */
 659                                 fifo->bit_line += current_len * 8;
 660
 661                                 context_iso_urb->buffer[tx_offset] = 0;
 662                                 if (current_len == len) {
 663                                         if (!transp_mode) {
 664                                                 /* here frame completion */
 665                                                 context_iso_urb->
 666                                                     buffer[tx_offset] = 1;
 667                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 668                                                 fifo->bit_line += 32;
 669                                         }
 670                                         frame_complete = TRUE;
 671                                 }
 672
 673                                 memcpy(context_iso_urb->buffer +
 674                                        tx_offset + 1, fifo->skbuff->data,
 675                                        current_len);
 676                                 skb_pull(fifo->skbuff, current_len);
 677
 678                                 /* define packet delimeters within the URB buffer */
 679                                 urb->iso_frame_desc[k].offset = tx_offset;
 680                                 urb->iso_frame_desc[k].length =
 681                                     current_len + 1;
 682
 683                                 tx_offset += (current_len + 1);
 684                         } else {
 685                                 urb->iso_frame_desc[k].offset =
 686                                     tx_offset++;
 687
 688                                 urb->iso_frame_desc[k].length = 1;
 689                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 690
 691                                 if (fifo->bit_line < BITLINE_INF) {
 692                                         fifo->bit_line = BITLINE_INF;
 693                                 }
 694                         }
 695
 696                         if (frame_complete) {
 697                                 fifo->delete_flg = TRUE;
 698                                 fifo->hif->l1l2(fifo->hif,
 699                                                 PH_DATA | CONFIRM,
 700                                                 (void *) fifo->skbuff->
 701                                                 truesize);
 702                                 if (fifo->skbuff && fifo->delete_flg) {
 703                                         dev_kfree_skb_any(fifo->skbuff);
 704                                         fifo->skbuff = NULL;
 705                                         fifo->delete_flg = FALSE;
 706                                 }
 707                                 frame_complete = FALSE;
 708                         }
 709                 }
 710                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 711                 if (errcode < 0) {
 712                         printk(KERN_INFO
 713                                "HFC-S USB: error submitting ISO URB: %d \n",
 714                                errcode);
 715                 }
 716         } else {
 717                 if (status && !hfc->disc_flag) {
 718                         printk(KERN_INFO
 719                                "HFC-S USB: tx_iso_complete : urb->status %s (%i), fifonum=%d\n",
 720                                symbolic(urb_errlist, status), status,
 721                                fifon);
 722                 }
 723         }
 724 }                               /* tx_iso_complete */
 725
 726 /*****************************************************/
 727 /* receive completion routine for all ISO tx fifos   */
 728 /*****************************************************/
 729 static void
 730 rx_iso_complete(struct urb *urb, struct pt_regs *regs)
 731 {
 732         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 733         usb_fifo *fifo = context_iso_urb->owner_fifo;
 734         hfcusb_data *hfc = fifo->hfc;
 735         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 736             status;
 737         unsigned int iso_status;
 738         __u8 *buf;
 739         static __u8 eof[8];
 740 #ifdef CONFIG_HISAX_DEBUG
 741         __u8 i;
 742 #endif
 743
 744         fifon = fifo->fifonum;
 745         status = urb->status;
 746
 747         if (urb->status == -EOVERFLOW) {
 748 #ifdef CONFIG_HISAX_DEBUG
 749                 DBG(USB_DBG,
 750                     "HFC-USB: ignoring USB DATAOVERRUN  for fifo  %i \n",
 751                     fifon);
 752 #endif
 753                 status = 0;
 754         }
 755         if (fifo->active && !status) {
 756                 num_isoc_packets = iso_packets[fifon];
 757                 maxlen = fifo->usb_packet_maxlen;
 758                 for (k = 0; k < num_isoc_packets; ++k) {
 759                         len = urb->iso_frame_desc[k].actual_length;
 760                         offset = urb->iso_frame_desc[k].offset;
 761                         buf = context_iso_urb->buffer + offset;
 762                         iso_status = urb->iso_frame_desc[k].status;
 763 #ifdef CONFIG_HISAX_DEBUG
 764                         if (iso_status && !hfc->disc_flag)
 765                                 DBG(USB_DBG,
 766                                     "HFC-S USB: ISO packet failure - status:%x",
 767                                     iso_status);
 768
 769                         if ((fifon == 5) && (debug > 1)) {
 770                                 printk(KERN_INFO
 771                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 772                                        "act_urblen:%2d max-urblen:%2d "
 773                                        "EOF:0x%0x DATA: ",
 774                                        fifo->last_urblen, len, maxlen,
 775                                        eof[5]);
 776                                 for (i = 0; i < len; i++)
 777                                         printk("%.2x ", buf[i]);
 778                                 printk("\n");
 779                         }
 780 #endif
 781                         if (fifo->last_urblen != maxlen) {
 782                                 /* the threshold mask is in the 2nd status byte */
 783                                 hfc->threshold_mask = buf[1];
 784                                 /* care for L1 state only for D-Channel
 785                                    to avoid overlapped iso completions */
 786                                 if (fifon == 5) {
 787                                         /* the S0 state is in the upper half
 788                                            of the 1st status byte */
 789                                         state_handler(hfc, buf[0] >> 4);
 790                                 }
 791                                 eof[fifon] = buf[0] & 1;
 792                                 if (len > 2)
 793                                         collect_rx_frame(fifo, buf + 2,
 794                                                          len - 2,
 795                                                          (len <
 796                                                           maxlen) ?
 797                                                          eof[fifon] : 0);
 798                         } else {
 799                                 collect_rx_frame(fifo, buf, len,
 800                                                  (len <
 801                                                   maxlen) ? eof[fifon] :
 802                                                  0);
 803                         }
 804                         fifo->last_urblen = len;
 805                 }
 806
 807                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 808                               context_iso_urb->buffer, num_isoc_packets,
 809                               fifo->usb_packet_maxlen, fifo->intervall,
 810                               rx_iso_complete, urb->context);
 811                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 812                 if (errcode < 0) {
 813                         printk(KERN_INFO
 814                                "HFC-S USB: error submitting ISO URB: %d \n",
 815                                errcode);
 816                 }
 817         } else {
 818                 if (status && !hfc->disc_flag) {
 819                         printk(KERN_INFO
 820                                "HFC-S USB: rx_iso_complete : "
 821                                "urb->status %d, fifonum %d\n",
 822                                status, fifon);
 823                 }
 824         }
 825 }                               /* rx_iso_complete */
 826
 827 /*****************************************************/
 828 /* collect data from interrupt or isochron in        */
 829 /*****************************************************/
 830 static void
 831 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 832 {
 833         hfcusb_data *hfc = fifo->hfc;
 834         int transp_mode, fifon;
 835 #ifdef CONFIG_HISAX_DEBUG
 836         int i;
 837 #endif
 838         fifon = fifo->fifonum;
 839         transp_mode = 0;
 840         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 841                 transp_mode = TRUE;
 842
 843         if (!fifo->skbuff) {
 844                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 845                 if (!fifo->skbuff) {
 846                         printk(KERN_INFO
 847                                "HFC-S USB: cannot allocate buffer (dev_alloc_skb) fifo:%d\n",
 848                                fifon);
 849                         return;
 850                 }
 851         }
 852         if (len) {
 853                 if (fifo->skbuff->len + len < fifo->max_size) {
 854                         memcpy(skb_put(fifo->skbuff, len), data, len);
 855                 } else {
 856 #ifdef CONFIG_HISAX_DEBUG
 857                         printk(KERN_INFO "HFC-S USB: ");
 858                         for (i = 0; i < 15; i++)
 859                                 printk("%.2x ",
 860                                        fifo->skbuff->data[fifo->skbuff->
 861                                                           len - 15 + i]);
 862                         printk("\n");
 863 #endif
 864                         printk(KERN_INFO
 865                                "HCF-USB: got frame exceeded fifo->max_size:%d on fifo:%d\n",
 866                                fifo->max_size, fifon);
 867                 }
 868         }
 869         if (transp_mode && fifo->skbuff->len >= 128) {
 870                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 871                                 fifo->skbuff);
 872                 fifo->skbuff = NULL;
 873                 return;
 874         }
 875         /* we have a complete hdlc packet */
 876         if (finish) {
 877                 if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
 878                     && (fifo->skbuff->len > 3)) {
 879                         /* remove CRC & status */
 880                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 881                         if (fifon == HFCUSB_PCM_RX) {
 882                                 fifo->hif->l1l2(fifo->hif,
 883                                                 PH_DATA_E | INDICATION,
 884                                                 fifo->skbuff);
 885                         } else
 886                                 fifo->hif->l1l2(fifo->hif,
 887                                                 PH_DATA | INDICATION,
 888                                                 fifo->skbuff);
 889                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 890                 } else {
 891                         if (fifo->skbuff->len > 3) {
 892                                 printk(KERN_INFO
 893                                        "HFC-S USB: got frame %d bytes but CRC ERROR on fifo:%d!!!\n",
 894                                        fifo->skbuff->len, fifon);
 895 #ifdef CONFIG_HISAX_DEBUG
 896                                 if (debug > 1) {
 897                                         printk(KERN_INFO "HFC-S USB: ");
 898                                         for (i = 0; i < 15; i++)
 899                                                 printk("%.2x ",
 900                                                        fifo->skbuff->
 901                                                        data[fifo->skbuff->
 902                                                             len - 15 + i]);
 903                                         printk("\n");
 904                                 }
 905 #endif
 906                         }
 907 #ifdef CONFIG_HISAX_DEBUG
 908                         else {
 909                                 printk(KERN_INFO
 910                                        "HFC-S USB: frame to small (%d bytes)!!!\n",
 911                                        fifo->skbuff->len);
 912                         }
 913 #endif
 914                         skb_trim(fifo->skbuff, 0);
 915                 }
 916         }
 917 }
 918
 919 /***********************************************/
 920 /* receive completion routine for all rx fifos */
 921 /***********************************************/
 922 static void
 923 rx_complete(struct urb *urb, struct pt_regs *regs)
 924 {
 925         int len;
 926         int status;
 927         __u8 *buf, maxlen, fifon;
 928         usb_fifo *fifo = (usb_fifo *) urb->context;
 929         hfcusb_data *hfc = fifo->hfc;
 930         static __u8 eof[8];
 931 #ifdef CONFIG_HISAX_DEBUG
 932         __u8 i;
 933 #endif
 934
 935         urb->dev = hfc->dev;    /* security init */
 936
 937         fifon = fifo->fifonum;
 938         if ((!fifo->active) || (urb->status)) {
 939 #ifdef CONFIG_HISAX_DEBUG
 940                 DBG(USB_DBG, "HFC-S USB: RX-Fifo %i is going down (%i)",
 941                     fifon, urb->status);
 942 #endif
 943                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 944                 if (fifo->skbuff) {
 945                         dev_kfree_skb_any(fifo->skbuff);
 946                         fifo->skbuff = NULL;
 947                 }
 948                 return;
 949         }
 950         len = urb->actual_length;
 951         buf = fifo->buffer;
 952         maxlen = fifo->usb_packet_maxlen;
 953
 954 #ifdef CONFIG_HISAX_DEBUG
 955         if ((fifon == 5) && (debug > 1)) {
 956                 printk(KERN_INFO
 957                        "HFC-S USB: INT-D-RX lst_urblen:%2d act_urblen:%2d max-urblen:%2d EOF:0x%0x DATA: ",
 958                        fifo->last_urblen, len, maxlen, eof[5]);
 959                 for (i = 0; i < len; i++)
 960                         printk("%.2x ", buf[i]);
 961                 printk("\n");
 962         }
 963 #endif
 964
 965         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 966                 /* the threshold mask is in the 2nd status byte */
 967                 hfc->threshold_mask = buf[1];
 968                 /* the S0 state is in the upper half of the 1st status byte */
 969                 state_handler(hfc, buf[0] >> 4);
 970                 eof[fifon] = buf[0] & 1;
 971                 /* if we have more than the 2 status bytes -> collect data */
 972                 if (len > 2)
 973                         collect_rx_frame(fifo, buf + 2,
 974                                          urb->actual_length - 2,
 975                                          (len < maxlen) ? eof[fifon] : 0);
 976         } else {
 977                 collect_rx_frame(fifo, buf, urb->actual_length,
 978                                  (len < maxlen) ? eof[fifon] : 0);
 979         }
 980         fifo->last_urblen = urb->actual_length;
 981         status = usb_submit_urb(urb, GFP_ATOMIC);
 982         if (status) {
 983                 printk(KERN_INFO
 984                        "HFC-S USB: error resubmitting URN at rx_complete...\n");
 985         }
 986 }                               /* rx_complete */
 987
 988 /***************************************************/
 989 /* start the interrupt transfer for the given fifo */
 990 /***************************************************/
 991 static void
 992 start_int_fifo(usb_fifo * fifo)
 993 {
 994         int errcode;
 995
 996         printk(KERN_INFO "HFC-S USB: starting intr IN fifo:%d\n",
 997                fifo->fifonum);
 998
 999         if (!fifo->urb) {
1000                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
1001                 if (!fifo->urb)
1002                         return;
1003         }
1004         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
1005                          fifo->buffer, fifo->usb_packet_maxlen,
1006                          rx_complete, fifo, fifo->intervall);
1007         fifo->active = 1;       /* must be marked active */
1008         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
1009         if (errcode) {
1010                 printk(KERN_INFO
1011                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
1012                        errcode);
1013                 fifo->active = 0;
1014                 fifo->skbuff = NULL;
1015         }
1016 }                               /* start_int_fifo */
1017
1018 /*****************************/
1019 /* set the B-channel mode    */
1020 /*****************************/
1021 static void
1022 set_hfcmode(hfcusb_data * hfc, int channel, int mode)
1023 {
1024         __u8 val, idx_table[2] = { 0, 2 };
1025
1026         if (hfc->disc_flag) {
1027                 return;
1028         }
1029 #ifdef CONFIG_HISAX_DEBUG
1030         DBG(ISDN_DBG, "HFC-S USB: setting channel %d to mode %d", channel,
1031             mode);
1032 #endif
1033         hfc->b_mode[channel] = mode;
1034
1035         /* setup CON_HDLC */
1036         val = 0;
1037         if (mode != L1_MODE_NULL)
1038                 val = 8;        /* enable fifo? */
1039         if (mode == L1_MODE_TRANS)
1040                 val |= 2;       /* set transparent bit */
1041
1042         /* set FIFO to transmit register */
1043         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
1044         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1045         /* reset fifo */
1046         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1047         /* set FIFO to receive register */
1048         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
1049         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1050         /* reset fifo */
1051         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1052
1053         val = 0x40;
1054         if (hfc->b_mode[0])
1055                 val |= 1;
1056         if (hfc->b_mode[1])
1057                 val |= 2;
1058         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
1059
1060         val = 0;
1061         if (hfc->b_mode[0])
1062                 val |= 1;
1063         if (hfc->b_mode[1])
1064                 val |= 2;
1065         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
1066
1067         if (mode == L1_MODE_NULL) {
1068                 if (channel)
1069                         handle_led(hfc, LED_B2_OFF);
1070                 else
1071                         handle_led(hfc, LED_B1_OFF);
1072         } else {
1073                 if (channel)
1074                         handle_led(hfc, LED_B2_ON);
1075                 else
1076                         handle_led(hfc, LED_B1_ON);
1077         }
1078 }
1079
1080 static void
1081 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
1082 {
1083         usb_fifo *fifo = my_hisax_if->priv;
1084         hfcusb_data *hfc = fifo->hfc;
1085
1086         switch (pr) {
1087                 case PH_ACTIVATE | REQUEST:
1088                         if (fifo->fifonum == HFCUSB_D_TX) {
1089 #ifdef CONFIG_HISAX_DEBUG
1090                                 DBG(ISDN_DBG,
1091                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1092 #endif
1093                                 if (hfc->l1_state != 3
1094                                     && hfc->l1_state != 7) {
1095                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1096                                                            PH_DEACTIVATE |
1097                                                            INDICATION,
1098                                                            NULL);
1099 #ifdef CONFIG_HISAX_DEBUG
1100                                         DBG(ISDN_DBG,
1101                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1102 #endif
1103                                 } else {
1104                                         if (hfc->l1_state == 7) {       /* l1 already active */
1105                                                 hfc->d_if.ifc.l1l2(&hfc->
1106                                                                    d_if.
1107                                                                    ifc,
1108                                                                    PH_ACTIVATE
1109                                                                    |
1110                                                                    INDICATION,
1111                                                                    NULL);
1112 #ifdef CONFIG_HISAX_DEBUG
1113                                                 DBG(ISDN_DBG,
1114                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1115 #endif
1116                                         } else {
1117                                                 /* force sending sending INFO1 */
1118                                                 queue_control_request(hfc,
1119                                                                       HFCUSB_STATES,
1120                                                                       0x14,
1121                                                                       1);
1122                                                 mdelay(1);
1123                                                 /* start l1 activation */
1124                                                 queue_control_request(hfc,
1125                                                                       HFCUSB_STATES,
1126                                                                       0x04,
1127                                                                       1);
1128                                                 if (!timer_pending
1129                                                     (&hfc->t3_timer)) {
1130                                                         hfc->t3_timer.
1131                                                             expires =
1132                                                             jiffies +
1133                                                             (HFC_TIMER_T3 *
1134                                                              HZ) / 1000;
1135                                                         add_timer(&hfc->
1136                                                                   t3_timer);
1137                                                 }
1138                                         }
1139                                 }
1140                         } else {
1141 #ifdef CONFIG_HISAX_DEBUG
1142                                 DBG(ISDN_DBG,
1143                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_ACTIVATE | REQUEST");
1144 #endif
1145                                 set_hfcmode(hfc,
1146                                             (fifo->fifonum ==
1147                                              HFCUSB_B1_TX) ? 0 : 1,
1148                                             (int) arg);
1149                                 fifo->hif->l1l2(fifo->hif,
1150                                                 PH_ACTIVATE | INDICATION,
1151                                                 NULL);
1152                         }
1153                         break;
1154                 case PH_DEACTIVATE | REQUEST:
1155                         if (fifo->fifonum == HFCUSB_D_TX) {
1156 #ifdef CONFIG_HISAX_DEBUG
1157                                 DBG(ISDN_DBG,
1158                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1159 #endif
1160                                 printk(KERN_INFO
1161                                        "HFC-S USB: ISDN TE device should not deativate...\n");
1162                         } else {
1163 #ifdef CONFIG_HISAX_DEBUG
1164                                 DBG(ISDN_DBG,
1165                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1166 #endif
1167                                 set_hfcmode(hfc,
1168                                             (fifo->fifonum ==
1169                                              HFCUSB_B1_TX) ? 0 : 1,
1170                                             (int) L1_MODE_NULL);
1171                                 fifo->hif->l1l2(fifo->hif,
1172                                                 PH_DEACTIVATE | INDICATION,
1173                                                 NULL);
1174                         }
1175                         break;
1176                 case PH_DATA | REQUEST:
1177                         if (fifo->skbuff && fifo->delete_flg) {
1178                                 dev_kfree_skb_any(fifo->skbuff);
1179                                 fifo->skbuff = NULL;
1180                                 fifo->delete_flg = FALSE;
1181                         }
1182                         fifo->skbuff = arg;     /* we have a new buffer */
1183                         break;
1184                 default:
1185                         printk(KERN_INFO
1186                                "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x\n",
1187                                pr);
1188                         break;
1189         }
1190 }
1191
1192 /***************************************************************************/
1193 /* usb_init is called once when a new matching device is detected to setup */
1194 /* main parameters. It registers the driver at the main hisax module.      */
1195 /* on success 0 is returned.                                               */
1196 /***************************************************************************/
1197 static int
1198 usb_init(hfcusb_data * hfc)
1199 {
1200         usb_fifo *fifo;
1201         int i, err;
1202         u_char b;
1203         struct hisax_b_if *p_b_if[2];
1204
1205         /* check the chip id */
1206         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1207                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1208                 return (1);
1209         }
1210         if (b != HFCUSB_CHIPID) {
1211                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1212                 return (1);
1213         }
1214
1215         /* first set the needed config, interface and alternate */
1216         err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1217
1218         /* do Chip reset */
1219         write_usb(hfc, HFCUSB_CIRM, 8);
1220         /* aux = output, reset off */
1221         write_usb(hfc, HFCUSB_CIRM, 0x10);
1222
1223         /* set USB_SIZE to match the the wMaxPacketSize for INT or BULK transfers */
1224         write_usb(hfc, HFCUSB_USB_SIZE,
1225                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1226
1227         /* set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers */
1228         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1229
1230         /* enable PCM/GCI master mode */
1231         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1232         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1233
1234         /* init the fifos */
1235         write_usb(hfc, HFCUSB_F_THRES,
1236                   (HFCUSB_TX_THRESHOLD /
1237                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1238
1239         fifo = hfc->fifos;
1240         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1241                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1242                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1243                 fifo[i].max_size =
1244                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1245                 fifo[i].last_urblen = 0;
1246                 /* set 2 bit for D- & E-channel */
1247                 write_usb(hfc, HFCUSB_HDLC_PAR,
1248                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1249                 /* rx hdlc, enable IFF for D-channel */
1250                 write_usb(hfc, HFCUSB_CON_HDLC,
1251                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1252                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1253         }
1254
1255         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1256         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1257         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1258
1259         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1260         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1261
1262         /* set both B-channel to not connected */
1263         hfc->b_mode[0] = L1_MODE_NULL;
1264         hfc->b_mode[1] = L1_MODE_NULL;
1265
1266         hfc->l1_activated = FALSE;
1267         hfc->disc_flag = FALSE;
1268         hfc->led_state = 0;
1269         hfc->led_new_data = 0;
1270         hfc->old_led_state = 0;
1271
1272         /* init the t3 timer */
1273         init_timer(&hfc->t3_timer);
1274         hfc->t3_timer.data = (long) hfc;
1275         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1276
1277         /* init the t4 timer */
1278         init_timer(&hfc->t4_timer);
1279         hfc->t4_timer.data = (long) hfc;
1280         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1281
1282         /* init the background machinery for control requests */
1283         hfc->ctrl_read.bRequestType = 0xc0;
1284         hfc->ctrl_read.bRequest = 1;
1285         hfc->ctrl_read.wLength = 1;
1286         hfc->ctrl_write.bRequestType = 0x40;
1287         hfc->ctrl_write.bRequest = 0;
1288         hfc->ctrl_write.wLength = 0;
1289         usb_fill_control_urb(hfc->ctrl_urb,
1290                              hfc->dev,
1291                              hfc->ctrl_out_pipe,
1292                              (u_char *) & hfc->ctrl_write,
1293                              NULL, 0, ctrl_complete, hfc);
1294         /* Init All Fifos */
1295         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1296                 hfc->fifos[i].iso[0].purb = NULL;
1297                 hfc->fifos[i].iso[1].purb = NULL;
1298                 hfc->fifos[i].active = 0;
1299         }
1300         /* register Modul to upper Hisax Layers */
1301         hfc->d_if.owner = THIS_MODULE;
1302         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1303         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1304         for (i = 0; i < 2; i++) {
1305                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1306                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1307                 p_b_if[i] = &hfc->b_if[i];
1308         }
1309         /* default Prot: EURO ISDN, should be a module_param */
1310         hfc->protocol = 2;
1311         hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1312
1313 #ifdef CONFIG_HISAX_DEBUG
1314         hfc_debug = debug;
1315 #endif
1316
1317         for (i = 0; i < 4; i++)
1318                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1319         for (i = 4; i < 8; i++)
1320                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1321
1322         /* 3 (+1) INT IN + 3 ISO OUT */
1323         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1324                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1325                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1326                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1327                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1328                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1329         }
1330         /* 3 (+1) ISO IN + 3 ISO OUT */
1331         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1332                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1333                                  rx_iso_complete, 16);
1334                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1335                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1336                                          ISOC_PACKETS_D, rx_iso_complete,
1337                                          16);
1338                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1339                                  rx_iso_complete, 16);
1340                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1341                                  rx_iso_complete, 16);
1342         }
1343
1344         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1345                          tx_iso_complete, 1);
1346         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1347                          tx_iso_complete, 1);
1348         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1349                          tx_iso_complete, 1);
1350
1351         handle_led(hfc, LED_POWER_ON);
1352
1353         return (0);
1354 }                               /* usb_init */
1355
1356 /*************************************************/
1357 /* function called to probe a new plugged device */
1358 /*************************************************/
1359 static int
1360 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1361 {
1362         struct usb_device *dev = interface_to_usbdev(intf);
1363         hfcusb_data *context;
1364         struct usb_host_interface *iface = intf->cur_altsetting;
1365         struct usb_host_interface *iface_used = NULL;
1366         struct usb_host_endpoint *ep;
1367         int ifnum = iface->desc.bInterfaceNumber;
1368         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1369             attr, cfg_found, cidx, ep_addr;
1370         int cmptbl[16], small_match, iso_packet_size, packet_size,
1371             alt_used = 0;
1372         hfcsusb_vdata *driver_info;
1373
1374         vend_idx = 0xffff;
1375         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1376                 if (dev->descriptor.idVendor == hfcusb_idtab[i].idVendor
1377                     && dev->descriptor.idProduct ==
1378                     hfcusb_idtab[i].idProduct) {
1379                         vend_idx = i;
1380                         continue;
1381                 }
1382         }
1383
1384 #ifdef CONFIG_HISAX_DEBUG
1385         DBG(USB_DBG,
1386             "HFC-USB: probing interface(%d) actalt(%d) minor(%d)\n", ifnum,
1387             iface->desc.bAlternateSetting, intf->minor);
1388 #endif
1389         printk(KERN_INFO
1390                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1391                ifnum, iface->desc.bAlternateSetting, intf->minor);
1392
1393         if (vend_idx != 0xffff) {
1394                 /* if vendor and product ID is OK, start probing alternate settings */
1395                 alt_idx = 0;
1396                 small_match = 0xffff;
1397
1398                 /* default settings */
1399                 iso_packet_size = 16;
1400                 packet_size = 64;
1401
1402                 while (alt_idx < intf->num_altsetting) {
1403                         iface = intf->altsetting + alt_idx;
1404                         probe_alt_setting = iface->desc.bAlternateSetting;
1405                         cfg_used = 0;
1406
1407                         /* check for config EOL element */
1408                         while (validconf[cfg_used][0]) {
1409                                 cfg_found = TRUE;
1410                                 vcf = validconf[cfg_used];
1411                                 /* first endpoint descriptor */
1412                                 ep = iface->endpoint;
1413 #ifdef CONFIG_HISAX_DEBUG
1414                                 DBG(USB_DBG,
1415                                     "HFC-S USB: (if=%d alt=%d cfg_used=%d)\n",
1416                                     ifnum, probe_alt_setting, cfg_used);
1417 #endif
1418                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1419
1420                                 /* check for all endpoints in this alternate setting */
1421                                 for (i = 0; i < iface->desc.bNumEndpoints;
1422                                      i++) {
1423                                         ep_addr =
1424                                             ep->desc.bEndpointAddress;
1425                                         /* get endpoint base */
1426                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1427                                         if (ep_addr & 0x80)
1428                                                 idx++;
1429                                         attr = ep->desc.bmAttributes;
1430                                         if (cmptbl[idx] == EP_NUL) {
1431                                                 cfg_found = FALSE;
1432                                         }
1433                                         if (attr == USB_ENDPOINT_XFER_INT
1434                                             && cmptbl[idx] == EP_INT)
1435                                                 cmptbl[idx] = EP_NUL;
1436                                         if (attr == USB_ENDPOINT_XFER_BULK
1437                                             && cmptbl[idx] == EP_BLK)
1438                                                 cmptbl[idx] = EP_NUL;
1439                                         if (attr == USB_ENDPOINT_XFER_ISOC
1440                                             && cmptbl[idx] == EP_ISO)
1441                                                 cmptbl[idx] = EP_NUL;
1442
1443                                         /* check if all INT endpoints match minimum interval */
1444                                         if (attr == USB_ENDPOINT_XFER_INT
1445                                             && ep->desc.bInterval <
1446                                             vcf[17]) {
1447 #ifdef CONFIG_HISAX_DEBUG
1448                                                 if (cfg_found)
1449                                                         DBG(USB_DBG,
1450                                                             "HFC-S USB: Interrupt Endpoint interval < %d found - skipping config",
1451                                                             vcf[17]);
1452 #endif
1453                                                 cfg_found = FALSE;
1454                                         }
1455                                         ep++;
1456                                 }
1457                                 for (i = 0; i < 16; i++) {
1458                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1459                                         if (cmptbl[i] != EP_NOP
1460                                             && cmptbl[i] != EP_NUL)
1461                                                 cfg_found = FALSE;
1462                                 }
1463                                 if (cfg_found) {
1464                                         if (cfg_used < small_match) {
1465                                                 small_match = cfg_used;
1466                                                 alt_used =
1467                                                     probe_alt_setting;
1468                                                 iface_used = iface;
1469                                         }
1470 #ifdef CONFIG_HISAX_DEBUG
1471                                         DBG(USB_DBG,
1472                                             "HFC-USB: small_match=%x %x\n",
1473                                             small_match, alt_used);
1474 #endif
1475                                 }
1476                                 cfg_used++;
1477                         }
1478                         alt_idx++;
1479                 }               /* (alt_idx < intf->num_altsetting) */
1480
1481                 /* found a valid USB Ta Endpint config */
1482                 if (small_match != 0xffff) {
1483                         iface = iface_used;
1484                         if (!
1485                             (context =
1486                              kmalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1487                                 return (-ENOMEM);       /* got no mem */
1488                         memset(context, 0, sizeof(hfcusb_data));
1489
1490                         ep = iface->endpoint;
1491                         vcf = validconf[small_match];
1492
1493                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1494                                 ep_addr = ep->desc.bEndpointAddress;
1495                                 /* get endpoint base */
1496                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1497                                 if (ep_addr & 0x80)
1498                                         idx++;
1499                                 cidx = idx & 7;
1500                                 attr = ep->desc.bmAttributes;
1501
1502                                 /* init Endpoints */
1503                                 if (vcf[idx] != EP_NOP
1504                                     && vcf[idx] != EP_NUL) {
1505                                         switch (attr) {
1506                                                 case USB_ENDPOINT_XFER_INT:
1507                                                         context->
1508                                                             fifos[cidx].
1509                                                             pipe =
1510                                                             usb_rcvintpipe
1511                                                             (dev,
1512                                                              ep->desc.
1513                                                              bEndpointAddress);
1514                                                         context->
1515                                                             fifos[cidx].
1516                                                             usb_transfer_mode
1517                                                             = USB_INT;
1518                                                         packet_size =
1519                                                             ep->desc.
1520                                                             wMaxPacketSize;
1521                                                         break;
1522                                                 case USB_ENDPOINT_XFER_BULK:
1523                                                         if (ep_addr & 0x80)
1524                                                                 context->
1525                                                                     fifos
1526                                                                     [cidx].
1527                                                                     pipe =
1528                                                                     usb_rcvbulkpipe
1529                                                                     (dev,
1530                                                                      ep->
1531                                                                      desc.
1532                                                                      bEndpointAddress);
1533                                                         else
1534                                                                 context->
1535                                                                     fifos
1536                                                                     [cidx].
1537                                                                     pipe =
1538                                                                     usb_sndbulkpipe
1539                                                                     (dev,
1540                                                                      ep->
1541                                                                      desc.
1542                                                                      bEndpointAddress);
1543                                                         context->
1544                                                             fifos[cidx].
1545                                                             usb_transfer_mode
1546                                                             = USB_BULK;
1547                                                         packet_size =
1548                                                             ep->desc.
1549                                                             wMaxPacketSize;
1550                                                         break;
1551                                                 case USB_ENDPOINT_XFER_ISOC:
1552                                                         if (ep_addr & 0x80)
1553                                                                 context->
1554                                                                     fifos
1555                                                                     [cidx].
1556                                                                     pipe =
1557                                                                     usb_rcvisocpipe
1558                                                                     (dev,
1559                                                                      ep->
1560                                                                      desc.
1561                                                                      bEndpointAddress);
1562                                                         else
1563                                                                 context->
1564                                                                     fifos
1565                                                                     [cidx].
1566                                                                     pipe =
1567                                                                     usb_sndisocpipe
1568                                                                     (dev,
1569                                                                      ep->
1570                                                                      desc.
1571                                                                      bEndpointAddress);
1572                                                         context->
1573                                                             fifos[cidx].
1574                                                             usb_transfer_mode
1575                                                             = USB_ISOC;
1576                                                         iso_packet_size =
1577                                                             ep->desc.
1578                                                             wMaxPacketSize;
1579                                                         break;
1580                                                 default:
1581                                                         context->
1582                                                             fifos[cidx].
1583                                                             pipe = 0;
1584                                         }       /* switch attribute */
1585
1586                                         if (context->fifos[cidx].pipe) {
1587                                                 context->fifos[cidx].
1588                                                     fifonum = cidx;
1589                                                 context->fifos[cidx].hfc =
1590                                                     context;
1591                                                 context->fifos[cidx].
1592                                                     usb_packet_maxlen =
1593                                                     ep->desc.
1594                                                     wMaxPacketSize;
1595                                                 context->fifos[cidx].
1596                                                     intervall =
1597                                                     ep->desc.bInterval;
1598                                                 context->fifos[cidx].
1599                                                     skbuff = NULL;
1600                                         }
1601                                 }
1602                                 ep++;
1603                         }
1604                         context->dev = dev;     /* save device */
1605                         context->if_used = ifnum;       /* save used interface */
1606                         context->alt_used = alt_used;   /* and alternate config */
1607                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1608                         context->cfg_used = vcf[16];    /* store used config */
1609                         context->vend_idx = vend_idx;   /* store found vendor */
1610                         context->packet_size = packet_size;
1611                         context->iso_packet_size = iso_packet_size;
1612
1613                         /* create the control pipes needed for register access */
1614                         context->ctrl_in_pipe =
1615                             usb_rcvctrlpipe(context->dev, 0);
1616                         context->ctrl_out_pipe =
1617                             usb_sndctrlpipe(context->dev, 0);
1618                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1619
1620                         driver_info =
1621                             (hfcsusb_vdata *) hfcusb_idtab[vend_idx].
1622                             driver_info;
1623                         printk(KERN_INFO "HFC-S USB: detected \"%s\"\n",
1624                                driver_info->vend_name);
1625 #ifdef CONFIG_HISAX_DEBUG
1626                         DBG(USB_DBG,
1627                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d)\n",
1628                             conf_str[small_match], context->if_used,
1629                             context->alt_used);
1630                         printk(KERN_INFO
1631                                "HFC-S USB: E-channel (\"ECHO:\") logging ");
1632                         if (validconf[small_match][18])
1633                                 printk(" possible\n");
1634                         else
1635                                 printk("NOT possible\n");
1636 #endif
1637                         /* init the chip and register the driver */
1638                         if (usb_init(context)) {
1639                                 if (context->ctrl_urb) {
1640                                         usb_unlink_urb(context->ctrl_urb);
1641                                         usb_free_urb(context->ctrl_urb);
1642                                         context->ctrl_urb = NULL;
1643                                 }
1644                                 kfree(context);
1645                                 return (-EIO);
1646                         }
1647                         usb_set_intfdata(intf, context);
1648                         return (0);
1649                 }
1650         } else {
1651                 printk(KERN_INFO
1652                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1653         }
1654         return (-EIO);
1655 }
1656
1657 /****************************************************/
1658 /* function called when an active device is removed */
1659 /****************************************************/
1660 static void
1661 hfc_usb_disconnect(struct usb_interface
1662                    *intf)
1663 {
1664         hfcusb_data *context = usb_get_intfdata(intf);
1665         int i;
1666         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1667         context->disc_flag = TRUE;
1668         usb_set_intfdata(intf, NULL);
1669         if (!context)
1670                 return;
1671         if (timer_pending(&context->t3_timer))
1672                 del_timer(&context->t3_timer);
1673         if (timer_pending(&context->t4_timer))
1674                 del_timer(&context->t4_timer);
1675         /* tell all fifos to terminate */
1676         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1677                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1678                         if (context->fifos[i].active > 0) {
1679                                 stop_isoc_chain(&context->fifos[i]);
1680 #ifdef CONFIG_HISAX_DEBUG
1681                                 DBG(USB_DBG,
1682                                     "HFC-S USB: hfc_usb_disconnect: stopping ISOC chain Fifo no %i",
1683                                     i);
1684 #endif
1685                         }
1686                 } else {
1687                         if (context->fifos[i].active > 0) {
1688                                 context->fifos[i].active = 0;
1689 #ifdef CONFIG_HISAX_DEBUG
1690                                 DBG(USB_DBG,
1691                                     "HFC-S USB: hfc_usb_disconnect: unlinking URB for Fifo no %i",
1692                                     i);
1693 #endif
1694                         }
1695                         if (context->fifos[i].urb) {
1696                                 usb_unlink_urb(context->fifos[i].urb);
1697                                 usb_free_urb(context->fifos[i].urb);
1698                                 context->fifos[i].urb = NULL;
1699                         }
1700                 }
1701                 context->fifos[i].active = 0;
1702         }
1703         /* wait for all URBS to terminate */
1704         mdelay(10);
1705         if (context->ctrl_urb) {
1706                 usb_unlink_urb(context->ctrl_urb);
1707                 usb_free_urb(context->ctrl_urb);
1708                 context->ctrl_urb = NULL;
1709         }
1710         hisax_unregister(&context->d_if);
1711         kfree(context);         /* free our structure again */
1712 }                               /* hfc_usb_disconnect */
1713
1714 /************************************/
1715 /* our driver information structure */
1716 /************************************/
1717 static struct usb_driver hfc_drv = {
1718         .name  = "hfc_usb",
1719         .id_table = hfcusb_idtab,
1720         .probe = hfc_usb_probe,
1721         .disconnect = hfc_usb_disconnect,
1722 };
1723 static void __exit
1724 hfc_usb_exit(void)
1725 {
1726 #ifdef CONFIG_HISAX_DEBUG
1727         DBG(USB_DBG, "HFC-S USB: calling \"hfc_usb_exit\" ...");
1728 #endif
1729         usb_deregister(&hfc_drv);       /* release our driver */
1730         printk(KERN_INFO "HFC-S USB: module removed\n");
1731 }
1732
1733 static int __init
1734 hfc_usb_init(void)
1735 {
1736 #ifndef CONFIG_HISAX_DEBUG
1737         unsigned int debug = -1;
1738 #endif
1739         char revstr[30], datestr[30], dummy[30];
1740         sscanf(hfcusb_revision,
1741                "%s %s $ %s %s %s $ ", dummy, revstr,
1742                dummy, datestr, dummy);
1743         printk(KERN_INFO
1744                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1745                revstr, datestr, debug);
1746         if (usb_register(&hfc_drv)) {
1747                 printk(KERN_INFO
1748                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1749                 return (-1);    /* unable to register */
1750         }
1751         return (0);
1752 }
1753
1754 module_init(hfc_usb_init);
1755 module_exit(hfc_usb_exit);
1756 MODULE_AUTHOR(DRIVER_AUTHOR);
1757 MODULE_DESCRIPTION(DRIVER_DESC);
1758 MODULE_LICENSE("GPL");
1759 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);