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   1 /*
   2  * hfc_usb.c
   3  *
   4  * $Id: hfc_usb.c,v 4.34 2005/01/26 17:25:53 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 /*
  48 * Version Information
  49 * (do not modify the CVS Makros $Revision: 4.34 $ and $Date: 2005/01/26 17:25:53 $ !)
  50 */
  51 static const char *hfcusb_revision =
  52     "Revision: 4.34 $ Date: 2005/01/26 17:25:53 $ ";
  53
  54 /* Hisax debug support
  55 * use "modprobe debug=x" where x is bitfield of USB_DBG & ISDN_DBG
  56 */
  57 #ifdef CONFIG_HISAX_DEBUG
  58 #include <linux/moduleparam.h>
  59 #define __debug_variable hfc_debug
  60 #include "hisax_debug.h"
  61 static u_int debug;
  62 module_param(debug, uint, 0);
  63 static int hfc_debug;
  64 #endif
  65
  66
  67 /****************************************/
  68 /* data defining the devices to be used */
  69 /****************************************/
  70 static struct usb_device_id hfc_usb_idtab[] = {
  71         {USB_DEVICE(0x0959, 0x2bd0)},   /* Colognechip USB eval TA */
  72         {USB_DEVICE(0x0675, 0x1688)},   /* DrayTek miniVigor 128 USB ISDN TA */
  73         {USB_DEVICE(0x07b0, 0x0007)},   /* Billion USB TA 2 */
  74         {USB_DEVICE(0x0742, 0x2008)},   /* Stollmann USB TA */
  75         {USB_DEVICE(0x0742, 0x2009)},   /* Aceex USB ISDN TA */
  76         {USB_DEVICE(0x0742, 0x200A)},   /* OEM USB ISDN TA */
  77         {USB_DEVICE(0x08e3, 0x0301)},   /* OliTec ISDN USB */
  78         {USB_DEVICE(0x07fa, 0x0846)},   /* Bewan ISDN USB TA */
  79         {USB_DEVICE(0x07fa, 0x0847)},   /* Djinn Numeris USB */
  80         {USB_DEVICE(0x07b0, 0x0006)},   /* Twister ISDN USB TA */
  81         {}                      /* end with an all-zeroes entry */
  82 };
  83
  84 /* driver internal device specific data:
  85 *   VendorID, ProductID, Devicename, LED_SCHEME,
  86 *   LED's BitMask in HFCUSB_P_DATA Register : LED_USB, LED_S0, LED_B1, LED_B2
  87 */
  88 static vendor_data vdata[] = {
  89         /* CologneChip Eval TA */
  90         {0x0959, 0x2bd0, "ISDN USB TA (Cologne Chip HFC-S USB based)",
  91          LED_OFF, {4, 0, 2, 1}
  92          }
  93         ,
  94         /* DrayTek miniVigor 128 USB ISDN TA */
  95         {0x0675, 0x1688, "DrayTek miniVigor 128 USB ISDN TA",
  96          LED_SCHEME1, {1, 2, 0, 0}
  97          }
  98         ,
  99         /* Billion TA */
 100         {0x07b0, 0x0007, "Billion tiny USB ISDN TA 128",
 101          LED_SCHEME1, {0x80, -64, -32, -16}
 102          }
 103         ,
 104         /* Stollmann TA */
 105         {0x0742, 0x2008, "Stollmann USB TA",
 106          LED_SCHEME1, {4, 0, 2, 1}
 107          }
 108         ,
 109         /* Aceex USB ISDN TA */
 110         {0x0742, 0x2009, "Aceex USB ISDN TA",
 111          LED_SCHEME1, {4, 0, 2, 1}
 112          }
 113         ,
 114         /* OEM USB ISDN TA */
 115         {0x0742, 0x200A, "OEM USB ISDN TA",
 116          LED_SCHEME1, {4, 0, 2, 1}
 117          }
 118         ,
 119         /* Olitec TA  */
 120         {0x08e3, 0x0301, "Olitec USB RNIS",
 121          LED_SCHEME1, {2, 0, 1, 4}
 122          }
 123         ,
 124         /* Bewan TA   */
 125         {0x07fa, 0x0846, "Bewan Modem RNIS USB",
 126          LED_SCHEME1, {0x80, -64, -32, -16}
 127          }
 128         ,
 129         /* Bewan TA   */
 130         {0x07fa, 0x0847, "Djinn Numeris USB",
 131          LED_SCHEME1, {0x80, -64, -32, -16}
 132          }
 133         ,
 134         /* Twister ISDN TA   */
 135         {0x07b0, 0x0006, "Twister ISDN TA",
 136          LED_SCHEME1, {0x80, -64, -32, -16}
 137          }
 138         ,
 139         {0, 0, 0}               /* EOL element */
 140 };
 141
 142 /***************************************************************/
 143 /* structure defining input+output fifos (interrupt/bulk mode) */
 144 /***************************************************************/
 145 struct usb_fifo;                /* forward definition */
 146 typedef struct iso_urb_struct {
 147         struct urb *purb;
 148         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
 149         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
 150 } iso_urb_struct;
 151
 152
 153 struct hfcusb_data;             /* forward definition */
 154 typedef struct usb_fifo {
 155         int fifonum;            /* fifo index attached to this structure */
 156         int active;             /* fifo is currently active */
 157         struct hfcusb_data *hfc;        /* pointer to main structure */
 158         int pipe;               /* address of endpoint */
 159         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
 160         unsigned int max_size;  /* maximum size of receive/send packet */
 161         __u8 intervall;         /* interrupt interval */
 162         struct sk_buff *skbuff; /* actual used buffer */
 163         struct urb *urb;        /* transfer structure for usb routines */
 164         __u8 buffer[128];       /* buffer incoming/outgoing data */
 165         int bit_line;           /* how much bits are in the fifo? */
 166
 167         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
 168         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
 169         struct hisax_if *hif;   /* hisax interface */
 170         int delete_flg;         /* only delete skbuff once */
 171         int last_urblen;        /* remember length of last packet */
 172
 173 } usb_fifo;
 174
 175 /*********************************************/
 176 /* structure holding all data for one device */
 177 /*********************************************/
 178 typedef struct hfcusb_data {
 179         /* HiSax Interface for loadable Layer1 drivers */
 180         struct hisax_d_if d_if; /* see hisax_if.h */
 181         struct hisax_b_if b_if[2];      /* see hisax_if.h */
 182         int protocol;
 183
 184         struct usb_device *dev; /* our device */
 185         int if_used;            /* used interface number */
 186         int alt_used;           /* used alternate config */
 187         int ctrl_paksize;       /* control pipe packet size */
 188         int ctrl_in_pipe, ctrl_out_pipe;        /* handles for control pipe */
 189         int cfg_used;           /* configuration index used */
 190         int vend_idx;           /* vendor found */
 191         int b_mode[2];          /* B-channel mode */
 192         int l1_activated;       /* layer 1 activated */
 193         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
 194         int packet_size, iso_packet_size;
 195
 196         /* control pipe background handling */
 197         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
 198         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
 199         struct urb *ctrl_urb;   /* transfer structure for control channel */
 200
 201         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
 202         struct usb_ctrlrequest ctrl_read;       /* same for read request */
 203
 204         __u8 old_led_state, led_state, led_new_data, led_b_active;
 205
 206         volatile __u8 threshold_mask;   /* threshold actually reported */
 207         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
 208
 209         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
 210
 211         volatile __u8 l1_state; /* actual l1 state */
 212         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
 213         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
 214         struct timer_list led_timer;    /* timer flashing leds */
 215
 216 } hfcusb_data;
 217
 218
 219 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
 220                              int finish);
 221
 222
 223 static inline const char *
 224 symbolic(struct hfcusb_symbolic_list list[], const int num)
 225 {
 226         int i;
 227         for (i = 0; list[i].name != NULL; i++)
 228                 if (list[i].num == num)
 229                         return (list[i].name);
 230         return "<unkown>";
 231 }
 232
 233
 234 /******************************************************/
 235 /* start next background transfer for control channel */
 236 /******************************************************/
 237 static void
 238 ctrl_start_transfer(hfcusb_data * hfc)
 239 {
 240         if (hfc->ctrl_cnt) {
 241                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
 242                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
 243                 hfc->ctrl_urb->transfer_buffer = NULL;
 244                 hfc->ctrl_urb->transfer_buffer_length = 0;
 245                 hfc->ctrl_write.wIndex =
 246                     hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg;
 247                 hfc->ctrl_write.wValue =
 248                     hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val;
 249
 250                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
 251         }
 252 }                               /* ctrl_start_transfer */
 253
 254 /************************************/
 255 /* queue a control transfer request */
 256 /* return 0 on success.             */
 257 /************************************/
 258 static int
 259 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
 260 {
 261         ctrl_buft *buf;
 262
 263         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 264                 return (1);     /* no space left */
 265         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
 266         buf->hfc_reg = reg;
 267         buf->reg_val = val;
 268         buf->action = action;
 269         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 270                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
 271         if (++hfc->ctrl_cnt == 1)
 272                 ctrl_start_transfer(hfc);
 273         return (0);
 274 }                               /* queue_control_request */
 275
 276 static int
 277 control_action_handler(hfcusb_data * hfc, int reg, int val, int action)
 278 {
 279         if (!action)
 280                 return (1);     /* no action defined */
 281         return (0);
 282 }
 283
 284 /***************************************************************/
 285 /* control completion routine handling background control cmds */
 286 /***************************************************************/
 287 static void
 288 ctrl_complete(struct urb *urb, struct pt_regs *regs)
 289 {
 290         hfcusb_data *hfc = (hfcusb_data *) urb->context;
 291         ctrl_buft *buf;
 292
 293         urb->dev = hfc->dev;
 294         if (hfc->ctrl_cnt) {
 295                 buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
 296                 control_action_handler(hfc, buf->hfc_reg, buf->reg_val,
 297                                        buf->action);
 298
 299                 hfc->ctrl_cnt--;        /* decrement actual count */
 300                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 301                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
 302
 303                 ctrl_start_transfer(hfc);       /* start next transfer */
 304         }
 305 }                               /* ctrl_complete */
 306
 307 /***************************************************/
 308 /* write led data to auxport & invert if necessary */
 309 /***************************************************/
 310 static void
 311 write_led(hfcusb_data * hfc, __u8 led_state)
 312 {
 313         if (led_state != hfc->old_led_state) {
 314                 hfc->old_led_state = led_state;
 315                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
 316         }
 317 }
 318
 319 /**************************/
 320 /* handle LED bits        */
 321 /**************************/
 322 static void
 323 set_led_bit(hfcusb_data * hfc, signed short led_bits, int unset)
 324 {
 325         if (unset) {
 326                 if (led_bits < 0)
 327                         hfc->led_state |= abs(led_bits);
 328                 else
 329                         hfc->led_state &= ~led_bits;
 330         } else {
 331                 if (led_bits < 0)
 332                         hfc->led_state &= ~abs(led_bits);
 333                 else
 334                         hfc->led_state |= led_bits;
 335         }
 336 }
 337
 338 /******************************************/
 339 /* invert B-channel LEDs if data is sent  */
 340 /******************************************/
 341 static void
 342 led_timer(hfcusb_data * hfc)
 343 {
 344         static int cnt = 0;
 345
 346         if (cnt) {
 347                 if (hfc->led_b_active & 1)
 348                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
 349                                     0);
 350                 if (hfc->led_b_active & 2)
 351                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
 352                                     0);
 353         } else {
 354                 if (!(hfc->led_b_active & 1) || hfc->led_new_data & 1)
 355                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
 356                                     1);
 357                 if (!(hfc->led_b_active & 2) || hfc->led_new_data & 2)
 358                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
 359                                     1);
 360         }
 361
 362         write_led(hfc, hfc->led_state);
 363         hfc->led_new_data = 0;
 364
 365         cnt = !cnt;
 366
 367         /* restart 4 hz timer */
 368         if (!timer_pending(&hfc->led_timer)) {
 369                 add_timer(&hfc->led_timer);
 370                 hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
 371         }
 372 }
 373
 374 /**************************/
 375 /* handle LED requests    */
 376 /**************************/
 377 static void
 378 handle_led(hfcusb_data * hfc, int event)
 379 {
 380         /* if no scheme -> no LED action */
 381         if (vdata[hfc->vend_idx].led_scheme == LED_OFF)
 382                 return;
 383
 384         switch (event) {
 385                 case LED_POWER_ON:
 386                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[0],
 387                                     0);
 388                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
 389                                     1);
 390                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[2],
 391                                     1);
 392                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[3],
 393                                     1);
 394                         break;
 395                 case LED_POWER_OFF:     /* no Power off handling */
 396                         break;
 397                 case LED_S0_ON:
 398                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
 399                                     0);
 400                         break;
 401                 case LED_S0_OFF:
 402                         set_led_bit(hfc, vdata[hfc->vend_idx].led_bits[1],
 403                                     1);
 404                         break;
 405                 case LED_B1_ON:
 406                         hfc->led_b_active |= 1;
 407                         break;
 408                 case LED_B1_OFF:
 409                         hfc->led_b_active &= ~1;
 410                         break;
 411                 case LED_B1_DATA:
 412                         hfc->led_new_data |= 1;
 413                         break;
 414                 case LED_B2_ON:
 415                         hfc->led_b_active |= 2;
 416                         break;
 417                 case LED_B2_OFF:
 418                         hfc->led_b_active &= ~2;
 419                         break;
 420                 case LED_B2_DATA:
 421                         hfc->led_new_data |= 2;
 422                         break;
 423         }
 424
 425         write_led(hfc, hfc->led_state);
 426 }
 427
 428 /********************************/
 429 /* called when timer t3 expires */
 430 /********************************/
 431 static void
 432 l1_timer_expire_t3(hfcusb_data * hfc)
 433 {
 434         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 435                            NULL);
 436 #ifdef CONFIG_HISAX_DEBUG
 437         DBG(ISDN_DBG,
 438             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 439 #endif
 440         hfc->l1_activated = FALSE;
 441         handle_led(hfc, LED_S0_OFF);
 442         /* deactivate : */
 443         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 444         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 445 }
 446
 447 /********************************/
 448 /* called when timer t4 expires */
 449 /********************************/
 450 static void
 451 l1_timer_expire_t4(hfcusb_data * hfc)
 452 {
 453         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 454                            NULL);
 455 #ifdef CONFIG_HISAX_DEBUG
 456         DBG(ISDN_DBG,
 457             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 458 #endif
 459         hfc->l1_activated = FALSE;
 460         handle_led(hfc, LED_S0_OFF);
 461 }
 462
 463 /*****************************/
 464 /* handle S0 state changes   */
 465 /*****************************/
 466 static void
 467 state_handler(hfcusb_data * hfc, __u8 state)
 468 {
 469         __u8 old_state;
 470
 471         old_state = hfc->l1_state;
 472         if (state == old_state || state < 1 || state > 8)
 473                 return;
 474
 475 #ifdef CONFIG_HISAX_DEBUG
 476         DBG(ISDN_DBG, "HFC-S USB: new S0 state:%d old_state:%d", state,
 477             old_state);
 478 #endif
 479         if (state < 4 || state == 7 || state == 8) {
 480                 if (timer_pending(&hfc->t3_timer))
 481                         del_timer(&hfc->t3_timer);
 482 #ifdef CONFIG_HISAX_DEBUG
 483                 DBG(ISDN_DBG, "HFC-S USB: T3 deactivated");
 484 #endif
 485         }
 486         if (state >= 7) {
 487                 if (timer_pending(&hfc->t4_timer))
 488                         del_timer(&hfc->t4_timer);
 489 #ifdef CONFIG_HISAX_DEBUG
 490                 DBG(ISDN_DBG, "HFC-S USB: T4 deactivated");
 491 #endif
 492         }
 493
 494         if (state == 7 && !hfc->l1_activated) {
 495                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 496                                    PH_ACTIVATE | INDICATION, NULL);
 497 #ifdef CONFIG_HISAX_DEBUG
 498                 DBG(ISDN_DBG, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 499 #endif
 500                 hfc->l1_activated = TRUE;
 501                 handle_led(hfc, LED_S0_ON);
 502         } else if (state <= 3 /* && activated */ ) {
 503                 if (old_state == 7 || old_state == 8) {
 504 #ifdef CONFIG_HISAX_DEBUG
 505                         DBG(ISDN_DBG, "HFC-S USB: T4 activated");
 506 #endif
 507                         if (!timer_pending(&hfc->t4_timer)) {
 508                                 hfc->t4_timer.expires =
 509                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 510                                 add_timer(&hfc->t4_timer);
 511                         }
 512                 } else {
 513                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 514                                            PH_DEACTIVATE | INDICATION,
 515                                            NULL);
 516 #ifdef CONFIG_HISAX_DEBUG
 517                         DBG(ISDN_DBG,
 518                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 519 #endif
 520                         hfc->l1_activated = FALSE;
 521                         handle_led(hfc, LED_S0_OFF);
 522                 }
 523         }
 524         hfc->l1_state = state;
 525 }
 526
 527 /* prepare iso urb */
 528 static void
 529 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 530               void *buf, int num_packets, int packet_size, int interval,
 531               usb_complete_t complete, void *context)
 532 {
 533         int k;
 534
 535         spin_lock_init(&urb->lock);
 536         urb->dev = dev;
 537         urb->pipe = pipe;
 538         urb->complete = complete;
 539         urb->number_of_packets = num_packets;
 540         urb->transfer_buffer_length = packet_size * num_packets;
 541         urb->context = context;
 542         urb->transfer_buffer = buf;
 543         urb->transfer_flags = URB_ISO_ASAP;
 544         urb->actual_length = 0;
 545         urb->interval = interval;
 546         for (k = 0; k < num_packets; k++) {
 547                 urb->iso_frame_desc[k].offset = packet_size * k;
 548                 urb->iso_frame_desc[k].length = packet_size;
 549                 urb->iso_frame_desc[k].actual_length = 0;
 550         }
 551 }
 552
 553 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 554    gaps in the transfer chain */
 555 static int
 556 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
 557                  usb_complete_t complete, int packet_size)
 558 {
 559         int i, k, errcode;
 560
 561         printk(KERN_INFO "HFC-S USB: starting ISO-chain for Fifo %i\n",
 562                fifo->fifonum);
 563
 564         /* allocate Memory for Iso out Urbs */
 565         for (i = 0; i < 2; i++) {
 566                 if (!(fifo->iso[i].purb)) {
 567                         fifo->iso[i].purb =
 568                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 569                         if (!(fifo->iso[i].purb)) {
 570                                 printk(KERN_INFO
 571                                        "alloc urb for fifo %i failed!!!",
 572                                        fifo->fifonum);
 573                         }
 574                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 575
 576                         /* Init the first iso */
 577                         if (ISO_BUFFER_SIZE >=
 578                             (fifo->usb_packet_maxlen *
 579                              num_packets_per_urb)) {
 580                                 fill_isoc_urb(fifo->iso[i].purb,
 581                                               fifo->hfc->dev, fifo->pipe,
 582                                               fifo->iso[i].buffer,
 583                                               num_packets_per_urb,
 584                                               fifo->usb_packet_maxlen,
 585                                               fifo->intervall, complete,
 586                                               &fifo->iso[i]);
 587                                 memset(fifo->iso[i].buffer, 0,
 588                                        sizeof(fifo->iso[i].buffer));
 589                                 /* defining packet delimeters in fifo->buffer */
 590                                 for (k = 0; k < num_packets_per_urb; k++) {
 591                                         fifo->iso[i].purb->
 592                                             iso_frame_desc[k].offset =
 593                                             k * packet_size;
 594                                         fifo->iso[i].purb->
 595                                             iso_frame_desc[k].length =
 596                                             packet_size;
 597                                 }
 598                         } else {
 599                                 printk(KERN_INFO
 600                                        "HFC-S USB: ISO Buffer size to small!\n");
 601                         }
 602                 }
 603                 fifo->bit_line = BITLINE_INF;
 604
 605                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 606                 fifo->active = (errcode >= 0) ? 1 : 0;
 607                 if (errcode < 0) {
 608                         printk(KERN_INFO "HFC-S USB: %s  URB nr:%d\n",
 609                                symbolic(urb_errlist, errcode), i);
 610                 };
 611         }
 612         return (fifo->active);
 613 }
 614
 615 /* stops running iso chain and frees their pending urbs */
 616 static void
 617 stop_isoc_chain(usb_fifo * fifo)
 618 {
 619         int i;
 620
 621         for (i = 0; i < 2; i++) {
 622                 if (fifo->iso[i].purb) {
 623 #ifdef CONFIG_HISAX_DEBUG
 624                         DBG(USB_DBG,
 625                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 626                             fifo->fifonum, i);
 627 #endif
 628                         usb_unlink_urb(fifo->iso[i].purb);
 629                         usb_free_urb(fifo->iso[i].purb);
 630                         fifo->iso[i].purb = NULL;
 631                 }
 632         }
 633         if (fifo->urb) {
 634                 usb_unlink_urb(fifo->urb);
 635                 usb_free_urb(fifo->urb);
 636                 fifo->urb = NULL;
 637         }
 638         fifo->active = 0;
 639 }
 640
 641 /* defines how much ISO packets are handled in one URB */
 642 static int iso_packets[8] =
 643     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 644         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 645 };
 646
 647 /*****************************************************/
 648 /* transmit completion routine for all ISO tx fifos */
 649 /*****************************************************/
 650 static void
 651 tx_iso_complete(struct urb *urb, struct pt_regs *regs)
 652 {
 653         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 654         usb_fifo *fifo = context_iso_urb->owner_fifo;
 655         hfcusb_data *hfc = fifo->hfc;
 656         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 657             errcode;
 658         int frame_complete, transp_mode, fifon, status;
 659         __u8 threshbit;
 660         __u8 threshtable[8] = { 1, 2, 4, 8, 0x10, 0x20, 0x40, 0x80 };
 661
 662         fifon = fifo->fifonum;
 663         status = urb->status;
 664
 665         tx_offset = 0;
 666
 667         if (fifo->active && !status) {
 668                 transp_mode = 0;
 669                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 670                         transp_mode = TRUE;
 671
 672                 /* is FifoFull-threshold set for our channel? */
 673                 threshbit = threshtable[fifon] & hfc->threshold_mask;
 674                 num_isoc_packets = iso_packets[fifon];
 675
 676                 /* predict dataflow to avoid fifo overflow */
 677                 if (fifon >= HFCUSB_D_TX) {
 678                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 679                 } else {
 680                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 681                 }
 682                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 683                               context_iso_urb->buffer, num_isoc_packets,
 684                               fifo->usb_packet_maxlen, fifo->intervall,
 685                               tx_iso_complete, urb->context);
 686                 memset(context_iso_urb->buffer, 0,
 687                        sizeof(context_iso_urb->buffer));
 688                 frame_complete = FALSE;
 689                 /* Generate next Iso Packets */
 690                 for (k = 0; k < num_isoc_packets; ++k) {
 691                         if (fifo->skbuff) {
 692                                 len = fifo->skbuff->len;
 693                                 /* we lower data margin every msec */
 694                                 fifo->bit_line -= sink;
 695                                 current_len = (0 - fifo->bit_line) / 8;
 696                                 /* maximum 15 byte for every ISO packet makes our life easier */
 697                                 if (current_len > 14)
 698                                         current_len = 14;
 699                                 current_len =
 700                                     (len <=
 701                                      current_len) ? len : current_len;
 702                                 /* how much bit do we put on the line? */
 703                                 fifo->bit_line += current_len * 8;
 704
 705                                 context_iso_urb->buffer[tx_offset] = 0;
 706                                 if (current_len == len) {
 707                                         if (!transp_mode) {
 708                                                 /* here frame completion */
 709                                                 context_iso_urb->
 710                                                     buffer[tx_offset] = 1;
 711                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 712                                                 fifo->bit_line += 32;
 713                                         }
 714                                         frame_complete = TRUE;
 715                                 }
 716
 717                                 memcpy(context_iso_urb->buffer +
 718                                        tx_offset + 1, fifo->skbuff->data,
 719                                        current_len);
 720                                 skb_pull(fifo->skbuff, current_len);
 721
 722                                 /* define packet delimeters within the URB buffer */
 723                                 urb->iso_frame_desc[k].offset = tx_offset;
 724                                 urb->iso_frame_desc[k].length =
 725                                     current_len + 1;
 726
 727                                 tx_offset += (current_len + 1);
 728                                 if (!transp_mode) {
 729                                         if (fifon == HFCUSB_B1_TX)
 730                                                 handle_led(hfc,
 731                                                            LED_B1_DATA);
 732                                         if (fifon == HFCUSB_B2_TX)
 733                                                 handle_led(hfc,
 734                                                            LED_B2_DATA);
 735                                 }
 736                         } else {
 737                                 urb->iso_frame_desc[k].offset =
 738                                     tx_offset++;
 739
 740                                 urb->iso_frame_desc[k].length = 1;
 741                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 742
 743                                 if (fifo->bit_line < BITLINE_INF) {
 744                                         fifo->bit_line = BITLINE_INF;
 745                                 }
 746                         }
 747
 748                         if (frame_complete) {
 749                                 fifo->delete_flg = TRUE;
 750                                 fifo->hif->l1l2(fifo->hif,
 751                                                 PH_DATA | CONFIRM,
 752                                                 (void *) fifo->skbuff->
 753                                                 truesize);
 754                                 if (fifo->skbuff && fifo->delete_flg) {
 755                                         dev_kfree_skb_any(fifo->skbuff);
 756                                         fifo->skbuff = NULL;
 757                                         fifo->delete_flg = FALSE;
 758                                 }
 759                                 frame_complete = FALSE;
 760                         }
 761                 }
 762                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 763                 if (errcode < 0) {
 764                         printk(KERN_INFO
 765                                "HFC-S USB: error submitting ISO URB: %d \n",
 766                                errcode);
 767                 }
 768         } else {
 769                 if (status && !hfc->disc_flag) {
 770                         printk(KERN_INFO
 771                                "HFC-S USB: tx_iso_complete : urb->status %s (%i), fifonum=%d\n",
 772                                symbolic(urb_errlist, status), status,
 773                                fifon);
 774                 }
 775         }
 776 }                               /* tx_iso_complete */
 777
 778 /*****************************************************/
 779 /* receive completion routine for all ISO tx fifos   */
 780 /*****************************************************/
 781 static void
 782 rx_iso_complete(struct urb *urb, struct pt_regs *regs)
 783 {
 784         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 785         usb_fifo *fifo = context_iso_urb->owner_fifo;
 786         hfcusb_data *hfc = fifo->hfc;
 787         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 788             status;
 789         unsigned int iso_status;
 790         __u8 *buf;
 791         static __u8 eof[8];
 792 #ifdef CONFIG_HISAX_DEBUG
 793         __u8 i;
 794 #endif
 795
 796         fifon = fifo->fifonum;
 797         status = urb->status;
 798
 799         if (urb->status == -EOVERFLOW) {
 800 #ifdef CONFIG_HISAX_DEBUG
 801                 DBG(USB_DBG,
 802                     "HFC-USB: ignoring USB DATAOVERRUN  for fifo  %i \n",
 803                     fifon);
 804 #endif
 805                 status = 0;
 806         }
 807         if (fifo->active && !status) {
 808                 num_isoc_packets = iso_packets[fifon];
 809                 maxlen = fifo->usb_packet_maxlen;
 810                 for (k = 0; k < num_isoc_packets; ++k) {
 811                         len = urb->iso_frame_desc[k].actual_length;
 812                         offset = urb->iso_frame_desc[k].offset;
 813                         buf = context_iso_urb->buffer + offset;
 814                         iso_status = urb->iso_frame_desc[k].status;
 815 #ifdef CONFIG_HISAX_DEBUG
 816                         if (iso_status && !hfc->disc_flag)
 817                                 DBG(USB_DBG,
 818                                     "HFC-S USB: ISO packet failure - status:%x",
 819                                     iso_status);
 820
 821                         if ((fifon == 5) && (debug > 1)) {
 822                                 printk(KERN_INFO
 823                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 824                                        "act_urblen:%2d max-urblen:%2d "
 825                                        "EOF:0x%0x DATA: ",
 826                                        fifo->last_urblen, len, maxlen,
 827                                        eof[5]);
 828                                 for (i = 0; i < len; i++)
 829                                         printk("%.2x ", buf[i]);
 830                                 printk("\n");
 831                         }
 832 #endif
 833                         if (fifo->last_urblen != maxlen) {
 834                                 /* the threshold mask is in the 2nd status byte */
 835                                 hfc->threshold_mask = buf[1];
 836                                 /* care for L1 state only for D-Channel
 837                                    to avoid overlapped iso completions */
 838                                 if (fifon == 5) {
 839                                         /* the S0 state is in the upper half
 840                                            of the 1st status byte */
 841                                         state_handler(hfc, buf[0] >> 4);
 842                                 }
 843                                 eof[fifon] = buf[0] & 1;
 844                                 if (len > 2)
 845                                         collect_rx_frame(fifo, buf + 2,
 846                                                          len - 2,
 847                                                          (len <
 848                                                           maxlen) ?
 849                                                          eof[fifon] : 0);
 850                         } else {
 851                                 collect_rx_frame(fifo, buf, len,
 852                                                  (len <
 853                                                   maxlen) ? eof[fifon] :
 854                                                  0);
 855                         }
 856                         fifo->last_urblen = len;
 857                 }
 858
 859                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 860                               context_iso_urb->buffer, num_isoc_packets,
 861                               fifo->usb_packet_maxlen, fifo->intervall,
 862                               rx_iso_complete, urb->context);
 863                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 864                 if (errcode < 0) {
 865                         printk(KERN_INFO
 866                                "HFC-S USB: error submitting ISO URB: %d \n",
 867                                errcode);
 868                 }
 869         } else {
 870                 if (status && !hfc->disc_flag) {
 871                         printk(KERN_INFO
 872                                "HFC-S USB: rx_iso_complete : "
 873                                "urb->status %d, fifonum %d\n",
 874                                status, fifon);
 875                 }
 876         }
 877 }                               /* rx_iso_complete */
 878
 879 /*****************************************************/
 880 /* collect data from interrupt or isochron in        */
 881 /*****************************************************/
 882 static void
 883 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 884 {
 885         hfcusb_data *hfc = fifo->hfc;
 886         int transp_mode, fifon;
 887 #ifdef CONFIG_HISAX_DEBUG
 888         int i;
 889 #endif
 890         fifon = fifo->fifonum;
 891         transp_mode = 0;
 892         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 893                 transp_mode = TRUE;
 894
 895         if (!fifo->skbuff) {
 896                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 897                 if (!fifo->skbuff) {
 898                         printk(KERN_INFO
 899                                "HFC-S USB: cannot allocate buffer (dev_alloc_skb) fifo:%d\n",
 900                                fifon);
 901                         return;
 902                 }
 903         }
 904         if (len) {
 905                 if (fifo->skbuff->len + len < fifo->max_size) {
 906                         memcpy(skb_put(fifo->skbuff, len), data, len);
 907                 } else {
 908 #ifdef CONFIG_HISAX_DEBUG
 909                         printk(KERN_INFO "HFC-S USB: ");
 910                         for (i = 0; i < 15; i++)
 911                                 printk("%.2x ",
 912                                        fifo->skbuff->data[fifo->skbuff->
 913                                                           len - 15 + i]);
 914                         printk("\n");
 915 #endif
 916                         printk(KERN_INFO
 917                                "HCF-USB: got frame exceeded fifo->max_size:%d on fifo:%d\n",
 918                                fifo->max_size, fifon);
 919                 }
 920         }
 921         if (transp_mode && fifo->skbuff->len >= 128) {
 922                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 923                                 fifo->skbuff);
 924                 fifo->skbuff = NULL;
 925                 return;
 926         }
 927         /* we have a complete hdlc packet */
 928         if (finish) {
 929                 if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
 930                     && (fifo->skbuff->len > 3)) {
 931                         /* remove CRC & status */
 932                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 933                         if (fifon == HFCUSB_PCM_RX) {
 934                                 fifo->hif->l1l2(fifo->hif,
 935                                                 PH_DATA_E | INDICATION,
 936                                                 fifo->skbuff);
 937                         } else
 938                                 fifo->hif->l1l2(fifo->hif,
 939                                                 PH_DATA | INDICATION,
 940                                                 fifo->skbuff);
 941                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 942                 } else {
 943                         if (fifo->skbuff->len > 3) {
 944                                 printk(KERN_INFO
 945                                        "HFC-S USB: got frame %d bytes but CRC ERROR on fifo:%d!!!\n",
 946                                        fifo->skbuff->len, fifon);
 947 #ifdef CONFIG_HISAX_DEBUG
 948                                 if (debug > 1) {
 949                                         printk(KERN_INFO "HFC-S USB: ");
 950                                         for (i = 0; i < 15; i++)
 951                                                 printk("%.2x ",
 952                                                        fifo->skbuff->
 953                                                        data[fifo->skbuff->
 954                                                             len - 15 + i]);
 955                                         printk("\n");
 956                                 }
 957 #endif
 958                         }
 959 #ifdef CONFIG_HISAX_DEBUG
 960                         else {
 961                                 printk(KERN_INFO
 962                                        "HFC-S USB: frame to small (%d bytes)!!!\n",
 963                                        fifo->skbuff->len);
 964                         }
 965 #endif
 966                         skb_trim(fifo->skbuff, 0);
 967                 }
 968         }
 969
 970         /* LED flashing only in HDLC mode */
 971         if (!transp_mode) {
 972                 if (fifon == HFCUSB_B1_RX)
 973                         handle_led(hfc, LED_B1_DATA);
 974                 if (fifon == HFCUSB_B2_RX)
 975                         handle_led(hfc, LED_B2_DATA);
 976         }
 977 }
 978
 979 /***********************************************/
 980 /* receive completion routine for all rx fifos */
 981 /***********************************************/
 982 static void
 983 rx_complete(struct urb *urb, struct pt_regs *regs)
 984 {
 985         int len;
 986         int status;
 987         __u8 *buf, maxlen, fifon;
 988         usb_fifo *fifo = (usb_fifo *) urb->context;
 989         hfcusb_data *hfc = fifo->hfc;
 990         static __u8 eof[8];
 991 #ifdef CONFIG_HISAX_DEBUG
 992         __u8 i;
 993 #endif
 994
 995         urb->dev = hfc->dev;    /* security init */
 996
 997         fifon = fifo->fifonum;
 998         if ((!fifo->active) || (urb->status)) {
 999 #ifdef CONFIG_HISAX_DEBUG
1000                 DBG(USB_DBG, "HFC-S USB: RX-Fifo %i is going down (%i)",
1001                     fifon, urb->status);
1002 #endif
1003                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
1004                 if (fifo->skbuff) {
1005                         dev_kfree_skb_any(fifo->skbuff);
1006                         fifo->skbuff = NULL;
1007                 }
1008                 return;
1009         }
1010         len = urb->actual_length;
1011         buf = fifo->buffer;
1012         maxlen = fifo->usb_packet_maxlen;
1013
1014 #ifdef CONFIG_HISAX_DEBUG
1015         if ((fifon == 5) && (debug > 1)) {
1016                 printk(KERN_INFO
1017                        "HFC-S USB: INT-D-RX lst_urblen:%2d act_urblen:%2d max-urblen:%2d EOF:0x%0x DATA: ",
1018                        fifo->last_urblen, len, maxlen, eof[5]);
1019                 for (i = 0; i < len; i++)
1020                         printk("%.2x ", buf[i]);
1021                 printk("\n");
1022         }
1023 #endif
1024
1025         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
1026                 /* the threshold mask is in the 2nd status byte */
1027                 hfc->threshold_mask = buf[1];
1028                 /* the S0 state is in the upper half of the 1st status byte */
1029                 state_handler(hfc, buf[0] >> 4);
1030                 eof[fifon] = buf[0] & 1;
1031                 /* if we have more than the 2 status bytes -> collect data */
1032                 if (len > 2)
1033                         collect_rx_frame(fifo, buf + 2,
1034                                          urb->actual_length - 2,
1035                                          (len < maxlen) ? eof[fifon] : 0);
1036         } else {
1037                 collect_rx_frame(fifo, buf, urb->actual_length,
1038                                  (len < maxlen) ? eof[fifon] : 0);
1039         }
1040         fifo->last_urblen = urb->actual_length;
1041         status = usb_submit_urb(urb, GFP_ATOMIC);
1042         if (status) {
1043                 printk(KERN_INFO
1044                        "HFC-S USB: error resubmitting URN at rx_complete...\n");
1045         }
1046 }                               /* rx_complete */
1047
1048 /***************************************************/
1049 /* start the interrupt transfer for the given fifo */
1050 /***************************************************/
1051 static void
1052 start_int_fifo(usb_fifo * fifo)
1053 {
1054         int errcode;
1055
1056         printk(KERN_INFO "HFC-S USB: starting intr IN fifo:%d\n",
1057                fifo->fifonum);
1058
1059         if (!fifo->urb) {
1060                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
1061                 if (!fifo->urb)
1062                         return;
1063         }
1064         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
1065                          fifo->buffer, fifo->usb_packet_maxlen,
1066                          rx_complete, fifo, fifo->intervall);
1067         fifo->active = 1;       /* must be marked active */
1068         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
1069         if (errcode) {
1070                 printk(KERN_INFO
1071                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
1072                        errcode);
1073                 fifo->active = 0;
1074                 fifo->skbuff = NULL;
1075         }
1076 }                               /* start_int_fifo */
1077
1078 /*****************************/
1079 /* set the B-channel mode    */
1080 /*****************************/
1081 static void
1082 set_hfcmode(hfcusb_data * hfc, int channel, int mode)
1083 {
1084         __u8 val, idx_table[2] = { 0, 2 };
1085
1086         if (hfc->disc_flag) {
1087                 return;
1088         }
1089 #ifdef CONFIG_HISAX_DEBUG
1090         DBG(ISDN_DBG, "HFC-S USB: setting channel %d to mode %d", channel,
1091             mode);
1092 #endif
1093         hfc->b_mode[channel] = mode;
1094
1095         /* setup CON_HDLC */
1096         val = 0;
1097         if (mode != L1_MODE_NULL)
1098                 val = 8;        /* enable fifo? */
1099         if (mode == L1_MODE_TRANS)
1100                 val |= 2;       /* set transparent bit */
1101
1102         /* set FIFO to transmit register */
1103         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
1104         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1105         /* reset fifo */
1106         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1107         /* set FIFO to receive register */
1108         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
1109         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
1110         /* reset fifo */
1111         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
1112
1113         val = 0x40;
1114         if (hfc->b_mode[0])
1115                 val |= 1;
1116         if (hfc->b_mode[1])
1117                 val |= 2;
1118         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
1119
1120         val = 0;
1121         if (hfc->b_mode[0])
1122                 val |= 1;
1123         if (hfc->b_mode[1])
1124                 val |= 2;
1125         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
1126
1127         if (mode == L1_MODE_NULL) {
1128                 if (channel)
1129                         handle_led(hfc, LED_B2_OFF);
1130                 else
1131                         handle_led(hfc, LED_B1_OFF);
1132         } else {
1133                 if (channel)
1134                         handle_led(hfc, LED_B2_ON);
1135                 else
1136                         handle_led(hfc, LED_B1_ON);
1137         }
1138 }
1139
1140 static void
1141 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
1142 {
1143         usb_fifo *fifo = my_hisax_if->priv;
1144         hfcusb_data *hfc = fifo->hfc;
1145
1146         switch (pr) {
1147                 case PH_ACTIVATE | REQUEST:
1148                         if (fifo->fifonum == HFCUSB_D_TX) {
1149 #ifdef CONFIG_HISAX_DEBUG
1150                                 DBG(ISDN_DBG,
1151                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1152 #endif
1153                                 if (hfc->l1_state != 3
1154                                     && hfc->l1_state != 7) {
1155                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1156                                                            PH_DEACTIVATE |
1157                                                            INDICATION,
1158                                                            NULL);
1159 #ifdef CONFIG_HISAX_DEBUG
1160                                         DBG(ISDN_DBG,
1161                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1162 #endif
1163                                 } else {
1164                                         if (hfc->l1_state == 7) {       /* l1 already active */
1165                                                 hfc->d_if.ifc.l1l2(&hfc->
1166                                                                    d_if.
1167                                                                    ifc,
1168                                                                    PH_ACTIVATE
1169                                                                    |
1170                                                                    INDICATION,
1171                                                                    NULL);
1172 #ifdef CONFIG_HISAX_DEBUG
1173                                                 DBG(ISDN_DBG,
1174                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1175 #endif
1176                                         } else {
1177                                                 /* force sending sending INFO1 */
1178                                                 queue_control_request(hfc,
1179                                                                       HFCUSB_STATES,
1180                                                                       0x14,
1181                                                                       1);
1182                                                 mdelay(1);
1183                                                 /* start l1 activation */
1184                                                 queue_control_request(hfc,
1185                                                                       HFCUSB_STATES,
1186                                                                       0x04,
1187                                                                       1);
1188                                                 if (!timer_pending
1189                                                     (&hfc->t3_timer)) {
1190                                                         hfc->t3_timer.
1191                                                             expires =
1192                                                             jiffies +
1193                                                             (HFC_TIMER_T3 *
1194                                                              HZ) / 1000;
1195                                                         add_timer(&hfc->
1196                                                                   t3_timer);
1197                                                 }
1198                                         }
1199                                 }
1200                         } else {
1201 #ifdef CONFIG_HISAX_DEBUG
1202                                 DBG(ISDN_DBG,
1203                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_ACTIVATE | REQUEST");
1204 #endif
1205                                 set_hfcmode(hfc,
1206                                             (fifo->fifonum ==
1207                                              HFCUSB_B1_TX) ? 0 : 1,
1208                                             (int) arg);
1209                                 fifo->hif->l1l2(fifo->hif,
1210                                                 PH_ACTIVATE | INDICATION,
1211                                                 NULL);
1212                         }
1213                         break;
1214                 case PH_DEACTIVATE | REQUEST:
1215                         if (fifo->fifonum == HFCUSB_D_TX) {
1216 #ifdef CONFIG_HISAX_DEBUG
1217                                 DBG(ISDN_DBG,
1218                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1219 #endif
1220                                 printk(KERN_INFO
1221                                        "HFC-S USB: ISDN TE device should not deativate...\n");
1222                         } else {
1223 #ifdef CONFIG_HISAX_DEBUG
1224                                 DBG(ISDN_DBG,
1225                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1226 #endif
1227                                 set_hfcmode(hfc,
1228                                             (fifo->fifonum ==
1229                                              HFCUSB_B1_TX) ? 0 : 1,
1230                                             (int) L1_MODE_NULL);
1231                                 fifo->hif->l1l2(fifo->hif,
1232                                                 PH_DEACTIVATE | INDICATION,
1233                                                 NULL);
1234                         }
1235                         break;
1236                 case PH_DATA | REQUEST:
1237                         if (fifo->skbuff && fifo->delete_flg) {
1238                                 dev_kfree_skb_any(fifo->skbuff);
1239                                 fifo->skbuff = NULL;
1240                                 fifo->delete_flg = FALSE;
1241                         }
1242                         fifo->skbuff = arg;     /* we have a new buffer */
1243                         break;
1244                 default:
1245                         printk(KERN_INFO
1246                                "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x\n",
1247                                pr);
1248                         break;
1249         }
1250 }
1251
1252 /***************************************************************************/
1253 /* usb_init is called once when a new matching device is detected to setup */
1254 /* main parameters. It registers the driver at the main hisax module.      */
1255 /* on success 0 is returned.                                               */
1256 /***************************************************************************/
1257 static int
1258 usb_init(hfcusb_data * hfc)
1259 {
1260         usb_fifo *fifo;
1261         int i, err;
1262         u_char b;
1263         struct hisax_b_if *p_b_if[2];
1264
1265         /* check the chip id */
1266         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1267                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1268                 return (1);
1269         }
1270         if (b != HFCUSB_CHIPID) {
1271                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1272                 return (1);
1273         }
1274
1275         /* first set the needed config, interface and alternate */
1276         err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1277
1278         /* do Chip reset */
1279         write_usb(hfc, HFCUSB_CIRM, 8);
1280         /* aux = output, reset off */
1281         write_usb(hfc, HFCUSB_CIRM, 0x10);
1282
1283         /* set USB_SIZE to match the the wMaxPacketSize for INT or BULK transfers */
1284         write_usb(hfc, HFCUSB_USB_SIZE,
1285                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1286
1287         /* set USB_SIZE_I to match the the wMaxPacketSize for ISO transfers */
1288         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1289
1290         /* enable PCM/GCI master mode */
1291         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1292         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1293
1294         /* init the fifos */
1295         write_usb(hfc, HFCUSB_F_THRES,
1296                   (HFCUSB_TX_THRESHOLD /
1297                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1298
1299         fifo = hfc->fifos;
1300         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1301                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1302                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1303                 fifo[i].max_size =
1304                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1305                 fifo[i].last_urblen = 0;
1306                 /* set 2 bit for D- & E-channel */
1307                 write_usb(hfc, HFCUSB_HDLC_PAR,
1308                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1309                 /* rx hdlc, enable IFF for D-channel */
1310                 write_usb(hfc, HFCUSB_CON_HDLC,
1311                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1312                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1313         }
1314
1315         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1316         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1317         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1318
1319         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1320         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1321
1322         /* set both B-channel to not connected */
1323         hfc->b_mode[0] = L1_MODE_NULL;
1324         hfc->b_mode[1] = L1_MODE_NULL;
1325
1326         hfc->l1_activated = FALSE;
1327         hfc->disc_flag = FALSE;
1328         hfc->led_state = 0;
1329         hfc->led_new_data = 0;
1330         hfc->old_led_state = 0;
1331
1332         /* init the t3 timer */
1333         init_timer(&hfc->t3_timer);
1334         hfc->t3_timer.data = (long) hfc;
1335         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1336
1337         /* init the t4 timer */
1338         init_timer(&hfc->t4_timer);
1339         hfc->t4_timer.data = (long) hfc;
1340         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1341
1342         /* init the led timer */
1343         init_timer(&hfc->led_timer);
1344         hfc->led_timer.data = (long) hfc;
1345         hfc->led_timer.function = (void *) led_timer;
1346
1347         /* trigger 4 hz led timer */
1348         if (!timer_pending(&hfc->led_timer)) {
1349                 hfc->led_timer.expires = jiffies + (LED_TIME * HZ) / 1000;
1350                 add_timer(&hfc->led_timer);
1351         }
1352
1353         /* init the background machinery for control requests */
1354         hfc->ctrl_read.bRequestType = 0xc0;
1355         hfc->ctrl_read.bRequest = 1;
1356         hfc->ctrl_read.wLength = 1;
1357         hfc->ctrl_write.bRequestType = 0x40;
1358         hfc->ctrl_write.bRequest = 0;
1359         hfc->ctrl_write.wLength = 0;
1360         usb_fill_control_urb(hfc->ctrl_urb,
1361                              hfc->dev,
1362                              hfc->ctrl_out_pipe,
1363                              (u_char *) & hfc->ctrl_write,
1364                              NULL, 0, ctrl_complete, hfc);
1365         /* Init All Fifos */
1366         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1367                 hfc->fifos[i].iso[0].purb = NULL;
1368                 hfc->fifos[i].iso[1].purb = NULL;
1369                 hfc->fifos[i].active = 0;
1370         }
1371         /* register Modul to upper Hisax Layers */
1372         hfc->d_if.owner = THIS_MODULE;
1373         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1374         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1375         for (i = 0; i < 2; i++) {
1376                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1377                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1378                 p_b_if[i] = &hfc->b_if[i];
1379         }
1380         /* default Prot: EURO ISDN, should be a module_param */
1381         hfc->protocol = 2;
1382         hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1383
1384 #ifdef CONFIG_HISAX_DEBUG
1385         hfc_debug = debug;
1386 #endif
1387
1388         for (i = 0; i < 4; i++)
1389                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1390         for (i = 4; i < 8; i++)
1391                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1392
1393         /* 3 (+1) INT IN + 3 ISO OUT */
1394         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1395                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1396                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1397                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1398                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1399                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1400         }
1401         /* 3 (+1) ISO IN + 3 ISO OUT */
1402         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1403                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1404                                  rx_iso_complete, 16);
1405                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1406                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1407                                          ISOC_PACKETS_D, rx_iso_complete,
1408                                          16);
1409                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1410                                  rx_iso_complete, 16);
1411                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1412                                  rx_iso_complete, 16);
1413         }
1414
1415         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1416                          tx_iso_complete, 1);
1417         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1418                          tx_iso_complete, 1);
1419         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1420                          tx_iso_complete, 1);
1421
1422         handle_led(hfc, LED_POWER_ON);
1423
1424         return (0);
1425 }                               /* usb_init */
1426
1427 /*************************************************/
1428 /* function called to probe a new plugged device */
1429 /*************************************************/
1430 static int
1431 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1432 {
1433         struct usb_device *dev = interface_to_usbdev(intf);
1434         hfcusb_data *context;
1435         struct usb_host_interface *iface = intf->cur_altsetting;
1436         struct usb_host_interface *iface_used = NULL;
1437         struct usb_host_endpoint *ep;
1438         int ifnum = iface->desc.bInterfaceNumber;
1439         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1440             attr, cfg_found, cidx, ep_addr;
1441         int cmptbl[16], small_match, iso_packet_size, packet_size,
1442             alt_used = 0;
1443
1444         vend_idx = 0xffff;
1445         for (i = 0; vdata[i].vendor; i++) {
1446                 if (dev->descriptor.idVendor == vdata[i].vendor
1447                     && dev->descriptor.idProduct == vdata[i].prod_id)
1448                         vend_idx = i;
1449         }
1450 #ifdef CONFIG_HISAX_DEBUG
1451         DBG(USB_DBG,
1452             "HFC-USB: probing interface(%d) actalt(%d) minor(%d)\n", ifnum,
1453             iface->desc.bAlternateSetting, intf->minor);
1454 #endif
1455         printk(KERN_INFO
1456                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1457                ifnum, iface->desc.bAlternateSetting, intf->minor);
1458
1459         if (vend_idx != 0xffff) {
1460 #ifdef CONFIG_HISAX_DEBUG
1461                 DBG(USB_DBG, "HFC-S USB: found vendor idx:%d  name:%s",
1462                     vend_idx, vdata[vend_idx].vend_name);
1463 #endif
1464                 /* if vendor and product ID is OK, start probing alternate settings */
1465                 alt_idx = 0;
1466                 small_match = 0xffff;
1467
1468                 /* default settings */
1469                 iso_packet_size = 16;
1470                 packet_size = 64;
1471
1472                 while (alt_idx < intf->num_altsetting) {
1473                         iface = intf->altsetting + alt_idx;
1474                         probe_alt_setting = iface->desc.bAlternateSetting;
1475                         cfg_used = 0;
1476
1477                         /* check for config EOL element */
1478                         while (validconf[cfg_used][0]) {
1479                                 cfg_found = TRUE;
1480                                 vcf = validconf[cfg_used];
1481                                 /* first endpoint descriptor */
1482                                 ep = iface->endpoint;
1483 #ifdef CONFIG_HISAX_DEBUG
1484                                 DBG(USB_DBG,
1485                                     "HFC-S USB: (if=%d alt=%d cfg_used=%d)\n",
1486                                     ifnum, probe_alt_setting, cfg_used);
1487 #endif
1488                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1489
1490                                 /* check for all endpoints in this alternate setting */
1491                                 for (i = 0; i < iface->desc.bNumEndpoints;
1492                                      i++) {
1493                                         ep_addr =
1494                                             ep->desc.bEndpointAddress;
1495                                         /* get endpoint base */
1496                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1497                                         if (ep_addr & 0x80)
1498                                                 idx++;
1499                                         attr = ep->desc.bmAttributes;
1500                                         if (cmptbl[idx] == EP_NUL) {
1501                                                 cfg_found = FALSE;
1502                                         }
1503                                         if (attr == USB_ENDPOINT_XFER_INT
1504                                             && cmptbl[idx] == EP_INT)
1505                                                 cmptbl[idx] = EP_NUL;
1506                                         if (attr == USB_ENDPOINT_XFER_BULK
1507                                             && cmptbl[idx] == EP_BLK)
1508                                                 cmptbl[idx] = EP_NUL;
1509                                         if (attr == USB_ENDPOINT_XFER_ISOC
1510                                             && cmptbl[idx] == EP_ISO)
1511                                                 cmptbl[idx] = EP_NUL;
1512
1513                                         /* check if all INT endpoints match minimum interval */
1514                                         if (attr == USB_ENDPOINT_XFER_INT
1515                                             && ep->desc.bInterval <
1516                                             vcf[17]) {
1517 #ifdef CONFIG_HISAX_DEBUG
1518                                                 if (cfg_found)
1519                                                         DBG(USB_DBG,
1520                                                             "HFC-S USB: Interrupt Endpoint interval < %d found - skipping config",
1521                                                             vcf[17]);
1522 #endif
1523                                                 cfg_found = FALSE;
1524                                         }
1525                                         ep++;
1526                                 }
1527                                 for (i = 0; i < 16; i++) {
1528                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1529                                         if (cmptbl[i] != EP_NOP
1530                                             && cmptbl[i] != EP_NUL)
1531                                                 cfg_found = FALSE;
1532                                 }
1533                                 if (cfg_found) {
1534                                         if (cfg_used < small_match) {
1535                                                 small_match = cfg_used;
1536                                                 alt_used =
1537                                                     probe_alt_setting;
1538                                                 iface_used = iface;
1539                                         }
1540 #ifdef CONFIG_HISAX_DEBUG
1541                                         DBG(USB_DBG,
1542                                             "HFC-USB: small_match=%x %x\n",
1543                                             small_match, alt_used);
1544 #endif
1545                                 }
1546                                 cfg_used++;
1547                         }
1548                         alt_idx++;
1549                 }               /* (alt_idx < intf->num_altsetting) */
1550
1551                 /* found a valid USB Ta Endpint config */
1552                 if (small_match != 0xffff) {
1553                         iface = iface_used;
1554                         if (!
1555                             (context =
1556                              kmalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1557                                 return (-ENOMEM);       /* got no mem */
1558                         memset(context, 0, sizeof(hfcusb_data));
1559
1560                         ep = iface->endpoint;
1561                         vcf = validconf[small_match];
1562
1563                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1564                                 ep_addr = ep->desc.bEndpointAddress;
1565                                 /* get endpoint base */
1566                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1567                                 if (ep_addr & 0x80)
1568                                         idx++;
1569                                 cidx = idx & 7;
1570                                 attr = ep->desc.bmAttributes;
1571
1572                                 /* init Endpoints */
1573                                 if (vcf[idx] != EP_NOP
1574                                     && vcf[idx] != EP_NUL) {
1575                                         switch (attr) {
1576                                                 case USB_ENDPOINT_XFER_INT:
1577                                                         context->
1578                                                             fifos[cidx].
1579                                                             pipe =
1580                                                             usb_rcvintpipe
1581                                                             (dev,
1582                                                              ep->desc.
1583                                                              bEndpointAddress);
1584                                                         context->
1585                                                             fifos[cidx].
1586                                                             usb_transfer_mode
1587                                                             = USB_INT;
1588                                                         packet_size =
1589                                                             ep->desc.
1590                                                             wMaxPacketSize;
1591                                                         break;
1592                                                 case USB_ENDPOINT_XFER_BULK:
1593                                                         if (ep_addr & 0x80)
1594                                                                 context->
1595                                                                     fifos
1596                                                                     [cidx].
1597                                                                     pipe =
1598                                                                     usb_rcvbulkpipe
1599                                                                     (dev,
1600                                                                      ep->
1601                                                                      desc.
1602                                                                      bEndpointAddress);
1603                                                         else
1604                                                                 context->
1605                                                                     fifos
1606                                                                     [cidx].
1607                                                                     pipe =
1608                                                                     usb_sndbulkpipe
1609                                                                     (dev,
1610                                                                      ep->
1611                                                                      desc.
1612                                                                      bEndpointAddress);
1613                                                         context->
1614                                                             fifos[cidx].
1615                                                             usb_transfer_mode
1616                                                             = USB_BULK;
1617                                                         packet_size =
1618                                                             ep->desc.
1619                                                             wMaxPacketSize;
1620                                                         break;
1621                                                 case USB_ENDPOINT_XFER_ISOC:
1622                                                         if (ep_addr & 0x80)
1623                                                                 context->
1624                                                                     fifos
1625                                                                     [cidx].
1626                                                                     pipe =
1627                                                                     usb_rcvisocpipe
1628                                                                     (dev,
1629                                                                      ep->
1630                                                                      desc.
1631                                                                      bEndpointAddress);
1632                                                         else
1633                                                                 context->
1634                                                                     fifos
1635                                                                     [cidx].
1636                                                                     pipe =
1637                                                                     usb_sndisocpipe
1638                                                                     (dev,
1639                                                                      ep->
1640                                                                      desc.
1641                                                                      bEndpointAddress);
1642                                                         context->
1643                                                             fifos[cidx].
1644                                                             usb_transfer_mode
1645                                                             = USB_ISOC;
1646                                                         iso_packet_size =
1647                                                             ep->desc.
1648                                                             wMaxPacketSize;
1649                                                         break;
1650                                                 default:
1651                                                         context->
1652                                                             fifos[cidx].
1653                                                             pipe = 0;
1654                                         }       /* switch attribute */
1655
1656                                         if (context->fifos[cidx].pipe) {
1657                                                 context->fifos[cidx].
1658                                                     fifonum = cidx;
1659                                                 context->fifos[cidx].hfc =
1660                                                     context;
1661                                                 context->fifos[cidx].
1662                                                     usb_packet_maxlen =
1663                                                     ep->desc.
1664                                                     wMaxPacketSize;
1665                                                 context->fifos[cidx].
1666                                                     intervall =
1667                                                     ep->desc.bInterval;
1668                                                 context->fifos[cidx].
1669                                                     skbuff = NULL;
1670                                         }
1671                                 }
1672                                 ep++;
1673                         }
1674                         context->dev = dev;     /* save device */
1675                         context->if_used = ifnum;       /* save used interface */
1676                         context->alt_used = alt_used;   /* and alternate config */
1677                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1678                         context->cfg_used = vcf[16];    /* store used config */
1679                         context->vend_idx = vend_idx;   /* store found vendor */
1680                         context->packet_size = packet_size;
1681                         context->iso_packet_size = iso_packet_size;
1682
1683                         /* create the control pipes needed for register access */
1684                         context->ctrl_in_pipe =
1685                             usb_rcvctrlpipe(context->dev, 0);
1686                         context->ctrl_out_pipe =
1687                             usb_sndctrlpipe(context->dev, 0);
1688                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1689
1690                         printk(KERN_INFO
1691                                "HFC-S USB: detected \"%s\"\n",
1692                                vdata[vend_idx].vend_name);
1693 #ifdef CONFIG_HISAX_DEBUG
1694                         DBG(USB_DBG,
1695                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d)\n",
1696                             conf_str[small_match], context->if_used,
1697                             context->alt_used);
1698                         printk(KERN_INFO
1699                                "HFC-S USB: E-channel (\"ECHO:\") logging ");
1700                         if (validconf[small_match][18])
1701                                 printk(" possible\n");
1702                         else
1703                                 printk("NOT possible\n");
1704 #endif
1705                         /* init the chip and register the driver */
1706                         if (usb_init(context)) {
1707                                 if (context->ctrl_urb) {
1708                                         usb_unlink_urb(context->ctrl_urb);
1709                                         usb_free_urb(context->ctrl_urb);
1710                                         context->ctrl_urb = NULL;
1711                                 }
1712                                 kfree(context);
1713                                 return (-EIO);
1714                         }
1715                         usb_set_intfdata(intf, context);
1716                         return (0);
1717                 }
1718         } else {
1719                 printk(KERN_INFO
1720                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1721         }
1722         return (-EIO);
1723 }
1724
1725 /****************************************************/
1726 /* function called when an active device is removed */
1727 /****************************************************/
1728 static void
1729 hfc_usb_disconnect(struct usb_interface
1730                    *intf)
1731 {
1732         hfcusb_data *context = usb_get_intfdata(intf);
1733         int i;
1734         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1735         context->disc_flag = TRUE;
1736         usb_set_intfdata(intf, NULL);
1737         if (!context)
1738                 return;
1739         if (timer_pending(&context->t3_timer))
1740                 del_timer(&context->t3_timer);
1741         if (timer_pending(&context->t4_timer))
1742                 del_timer(&context->t4_timer);
1743         if (timer_pending(&context->led_timer))
1744                 del_timer(&context->led_timer);
1745         /* tell all fifos to terminate */
1746         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1747                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1748                         if (context->fifos[i].active > 0) {
1749                                 stop_isoc_chain(&context->fifos[i]);
1750 #ifdef CONFIG_HISAX_DEBUG
1751                                 DBG(USB_DBG,
1752                                     "HFC-S USB: hfc_usb_disconnect: stopping ISOC chain Fifo no %i",
1753                                     i);
1754 #endif
1755                         }
1756                 } else {
1757                         if (context->fifos[i].active > 0) {
1758                                 context->fifos[i].active = 0;
1759 #ifdef CONFIG_HISAX_DEBUG
1760                                 DBG(USB_DBG,
1761                                     "HFC-S USB: hfc_usb_disconnect: unlinking URB for Fifo no %i",
1762                                     i);
1763 #endif
1764                         }
1765                         if (context->fifos[i].urb) {
1766                                 usb_unlink_urb(context->fifos[i].urb);
1767                                 usb_free_urb(context->fifos[i].urb);
1768                                 context->fifos[i].urb = NULL;
1769                         }
1770                 }
1771                 context->fifos[i].active = 0;
1772         }
1773         /* wait for all URBS to terminate */
1774         mdelay(10);
1775         if (context->ctrl_urb) {
1776                 usb_unlink_urb(context->ctrl_urb);
1777                 usb_free_urb(context->ctrl_urb);
1778                 context->ctrl_urb = NULL;
1779         }
1780         hisax_unregister(&context->d_if);
1781         kfree(context);         /* free our structure again */
1782 }                               /* hfc_usb_disconnect */
1783
1784 /************************************/
1785 /* our driver information structure */
1786 /************************************/
1787 static struct usb_driver hfc_drv = {
1788         .owner = THIS_MODULE,.name =
1789             "hfc_usb",.id_table = hfc_usb_idtab,.probe =
1790             hfc_usb_probe,.disconnect = hfc_usb_disconnect,
1791 };
1792 static void __exit
1793 hfc_usb_exit(void)
1794 {
1795 #ifdef CONFIG_HISAX_DEBUG
1796         DBG(USB_DBG, "HFC-S USB: calling \"hfc_usb_exit\" ...");
1797 #endif
1798         usb_deregister(&hfc_drv);       /* release our driver */
1799         printk(KERN_INFO "HFC-S USB: module removed\n");
1800 }
1801
1802 static int __init
1803 hfc_usb_init(void)
1804 {
1805 #ifndef CONFIG_HISAX_DEBUG
1806         unsigned int debug = -1;
1807 #endif
1808         char revstr[30], datestr[30], dummy[30];
1809         sscanf(hfcusb_revision,
1810                "%s %s $ %s %s %s $ ", dummy, revstr,
1811                dummy, datestr, dummy);
1812         printk(KERN_INFO
1813                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1814                revstr, datestr, debug);
1815         if (usb_register(&hfc_drv)) {
1816                 printk(KERN_INFO
1817                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1818                 return (-1);    /* unable to register */
1819         }
1820         return (0);
1821 }
1822
1823 module_init(hfc_usb_init);
1824 module_exit(hfc_usb_exit);
1825 MODULE_AUTHOR(DRIVER_AUTHOR);
1826 MODULE_DESCRIPTION(DRIVER_DESC);
1827 MODULE_LICENSE("GPL");
1828 MODULE_DEVICE_TABLE(usb, hfc_usb_idtab);