drivers/isdn/hisax/hfc_usb.c

   1 /*
   2  * hfc_usb.c
   3  *
   4  * $Id: hfc_usb.c,v 2.3.2.20 2007/08/20 14:07:54 mbachem 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 (m.bachem@gmx.de, 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/init.h>
  36 #include <linux/module.h>
  37 #include <linux/kernel_stat.h>
  38 #include <linux/usb.h>
  39 #include <linux/kernel.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/sched.h>
  42 #include <linux/moduleparam.h>
  43 #include "hisax.h"
  44 #include "hisax_if.h"
  45 #include "hfc_usb.h"
  46
  47 static const char *hfcusb_revision =
  48     "$Revision: 2.3.2.20 $ $Date: 2007/08/20 14:07:54 $ ";
  49
  50 /* Hisax debug support
  51 *  debug flags defined in hfc_usb.h as HFCUSB_DBG_[*]
  52 */
  53 #define __debug_variable hfc_debug
  54 #include "hisax_debug.h"
  55 static u_int debug;
  56 module_param(debug, uint, 0);
  57 static int hfc_debug;
  58
  59
  60 /* private vendor specific data */
  61 typedef struct {
  62         __u8 led_scheme;        // led display scheme
  63         signed short led_bits[8];       // array of 8 possible LED bitmask settings
  64         char *vend_name;        // device name
  65 } hfcsusb_vdata;
  66
  67 /* VID/PID device list */
  68 static struct usb_device_id hfcusb_idtab[] = {
  69         {
  70          USB_DEVICE(0x0959, 0x2bd0),
  71          .driver_info = (unsigned long) &((hfcsusb_vdata)
  72                           {LED_OFF, {4, 0, 2, 1},
  73                            "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
  74         },
  75         {
  76          USB_DEVICE(0x0675, 0x1688),
  77          .driver_info = (unsigned long) &((hfcsusb_vdata)
  78                           {LED_SCHEME1, {1, 2, 0, 0},
  79                            "DrayTek miniVigor 128 USB ISDN TA"}),
  80         },
  81         {
  82          USB_DEVICE(0x07b0, 0x0007),
  83          .driver_info = (unsigned long) &((hfcsusb_vdata)
  84                           {LED_SCHEME1, {0x80, -64, -32, -16},
  85                            "Billion tiny USB ISDN TA 128"}),
  86         },
  87         {
  88          USB_DEVICE(0x0742, 0x2008),
  89          .driver_info = (unsigned long) &((hfcsusb_vdata)
  90                           {LED_SCHEME1, {4, 0, 2, 1},
  91                            "Stollmann USB TA"}),
  92         },
  93         {
  94          USB_DEVICE(0x0742, 0x2009),
  95          .driver_info = (unsigned long) &((hfcsusb_vdata)
  96                           {LED_SCHEME1, {4, 0, 2, 1},
  97                            "Aceex USB ISDN TA"}),
  98         },
  99         {
 100          USB_DEVICE(0x0742, 0x200A),
 101          .driver_info = (unsigned long) &((hfcsusb_vdata)
 102                           {LED_SCHEME1, {4, 0, 2, 1},
 103                            "OEM USB ISDN TA"}),
 104         },
 105         {
 106          USB_DEVICE(0x08e3, 0x0301),
 107          .driver_info = (unsigned long) &((hfcsusb_vdata)
 108                           {LED_SCHEME1, {2, 0, 1, 4},
 109                            "Olitec USB RNIS"}),
 110         },
 111         {
 112          USB_DEVICE(0x07fa, 0x0846),
 113          .driver_info = (unsigned long) &((hfcsusb_vdata)
 114                           {LED_SCHEME1, {0x80, -64, -32, -16},
 115                            "Bewan Modem RNIS USB"}),
 116         },
 117         {
 118          USB_DEVICE(0x07fa, 0x0847),
 119          .driver_info = (unsigned long) &((hfcsusb_vdata)
 120                           {LED_SCHEME1, {0x80, -64, -32, -16},
 121                            "Djinn Numeris USB"}),
 122         },
 123         {
 124          USB_DEVICE(0x07b0, 0x0006),
 125          .driver_info = (unsigned long) &((hfcsusb_vdata)
 126                           {LED_SCHEME1, {0x80, -64, -32, -16},
 127                            "Twister ISDN TA"}),
 128         },
 129         { }
 130 };
 131
 132 /* structure defining input+output fifos (interrupt/bulk mode) */
 133 struct usb_fifo;                /* forward definition */
 134 typedef struct iso_urb_struct {
 135         struct urb *purb;
 136         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
 137         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
 138 } iso_urb_struct;
 139
 140 struct hfcusb_data;             /* forward definition */
 141
 142 typedef struct usb_fifo {
 143         int fifonum;            /* fifo index attached to this structure */
 144         int active;             /* fifo is currently active */
 145         struct hfcusb_data *hfc;        /* pointer to main structure */
 146         int pipe;               /* address of endpoint */
 147         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
 148         unsigned int max_size;  /* maximum size of receive/send packet */
 149         __u8 intervall;         /* interrupt interval */
 150         struct sk_buff *skbuff; /* actual used buffer */
 151         struct urb *urb;        /* transfer structure for usb routines */
 152         __u8 buffer[128];       /* buffer incoming/outgoing data */
 153         int bit_line;           /* how much bits are in the fifo? */
 154
 155         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
 156         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
 157         struct hisax_if *hif;   /* hisax interface */
 158         int delete_flg;         /* only delete skbuff once */
 159         int last_urblen;        /* remember length of last packet */
 160 } usb_fifo;
 161
 162 /* structure holding all data for one device */
 163 typedef struct hfcusb_data {
 164         /* HiSax Interface for loadable Layer1 drivers */
 165         struct hisax_d_if d_if;         /* see hisax_if.h */
 166         struct hisax_b_if b_if[2];      /* see hisax_if.h */
 167         int protocol;
 168
 169         struct usb_device *dev; /* our device */
 170         int if_used;            /* used interface number */
 171         int alt_used;           /* used alternate config */
 172         int ctrl_paksize;       /* control pipe packet size */
 173         int ctrl_in_pipe,       /* handles for control pipe */
 174             ctrl_out_pipe;
 175         int cfg_used;           /* configuration index used */
 176         int vend_idx;           /* vendor found */
 177         int b_mode[2];          /* B-channel mode */
 178         int l1_activated;       /* layer 1 activated */
 179         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
 180         int packet_size, iso_packet_size;
 181
 182         /* control pipe background handling */
 183         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
 184         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
 185         struct urb *ctrl_urb;   /* transfer structure for control channel */
 186
 187         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
 188         struct usb_ctrlrequest ctrl_read;       /* same for read request */
 189
 190         __u8 old_led_state, led_state, led_new_data, led_b_active;
 191
 192         volatile __u8 threshold_mask;   /* threshold actually reported */
 193         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
 194
 195         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
 196
 197         volatile __u8 l1_state; /* actual l1 state */
 198         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
 199         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
 200 } hfcusb_data;
 201
 202
 203 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
 204                              int finish);
 205
 206 static inline const char *
 207 symbolic(struct hfcusb_symbolic_list list[], const int num)
 208 {
 209         int i;
 210         for (i = 0; list[i].name != NULL; i++)
 211                 if (list[i].num == num)
 212                         return (list[i].name);
 213         return "<unknown ERROR>";
 214 }
 215
 216 static void
 217 ctrl_start_transfer(hfcusb_data * hfc)
 218 {
 219         if (hfc->ctrl_cnt) {
 220                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
 221                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
 222                 hfc->ctrl_urb->transfer_buffer = NULL;
 223                 hfc->ctrl_urb->transfer_buffer_length = 0;
 224                 hfc->ctrl_write.wIndex =
 225                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg);
 226                 hfc->ctrl_write.wValue =
 227                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val);
 228
 229                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
 230         }
 231 }                               /* ctrl_start_transfer */
 232
 233 static int
 234 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
 235 {
 236         ctrl_buft *buf;
 237
 238         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 239                 return (1);     /* no space left */
 240         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
 241         buf->hfc_reg = reg;
 242         buf->reg_val = val;
 243         buf->action = action;
 244         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 245                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
 246         if (++hfc->ctrl_cnt == 1)
 247                 ctrl_start_transfer(hfc);
 248         return (0);
 249 }
 250
 251 static void
 252 ctrl_complete(struct urb *urb)
 253 {
 254         hfcusb_data *hfc = (hfcusb_data *) urb->context;
 255         ctrl_buft *buf;
 256
 257         urb->dev = hfc->dev;
 258         if (hfc->ctrl_cnt) {
 259                 buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
 260                 hfc->ctrl_cnt--;        /* decrement actual count */
 261                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 262                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
 263
 264                 ctrl_start_transfer(hfc);       /* start next transfer */
 265         }
 266 }                               /* ctrl_complete */
 267
 268 /* write led data to auxport & invert if necessary */
 269 static void
 270 write_led(hfcusb_data * hfc, __u8 led_state)
 271 {
 272         if (led_state != hfc->old_led_state) {
 273                 hfc->old_led_state = led_state;
 274                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
 275         }
 276 }
 277
 278 static void
 279 set_led_bit(hfcusb_data * hfc, signed short led_bits, int unset)
 280 {
 281         if (unset) {
 282                 if (led_bits < 0)
 283                         hfc->led_state |= abs(led_bits);
 284                 else
 285                         hfc->led_state &= ~led_bits;
 286         } else {
 287                 if (led_bits < 0)
 288                         hfc->led_state &= ~abs(led_bits);
 289                 else
 290                         hfc->led_state |= led_bits;
 291         }
 292 }
 293
 294 /* handle LED requests */
 295 static void
 296 handle_led(hfcusb_data * hfc, int event)
 297 {
 298         hfcsusb_vdata *driver_info =
 299             (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;
 300
 301         /* if no scheme -> no LED action */
 302         if (driver_info->led_scheme == LED_OFF)
 303                 return;
 304
 305         switch (event) {
 306                 case LED_POWER_ON:
 307                         set_led_bit(hfc, driver_info->led_bits[0], 0);
 308                         set_led_bit(hfc, driver_info->led_bits[1], 1);
 309                         set_led_bit(hfc, driver_info->led_bits[2], 1);
 310                         set_led_bit(hfc, driver_info->led_bits[3], 1);
 311                         break;
 312                 case LED_POWER_OFF:
 313                         set_led_bit(hfc, driver_info->led_bits[0], 1);
 314                         set_led_bit(hfc, driver_info->led_bits[1], 1);
 315                         set_led_bit(hfc, driver_info->led_bits[2], 1);
 316                         set_led_bit(hfc, driver_info->led_bits[3], 1);
 317                         break;
 318                 case LED_S0_ON:
 319                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 320                         break;
 321                 case LED_S0_OFF:
 322                         set_led_bit(hfc, driver_info->led_bits[1], 1);
 323                         break;
 324                 case LED_B1_ON:
 325                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 326                         break;
 327                 case LED_B1_OFF:
 328                         set_led_bit(hfc, driver_info->led_bits[2], 1);
 329                         break;
 330                 case LED_B2_ON:
 331                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 332                         break;
 333                 case LED_B2_OFF:
 334                         set_led_bit(hfc, driver_info->led_bits[3], 1);
 335                         break;
 336         }
 337         write_led(hfc, hfc->led_state);
 338 }
 339
 340 /* ISDN l1 timer T3 expires */
 341 static void
 342 l1_timer_expire_t3(hfcusb_data * hfc)
 343 {
 344         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 345                            NULL);
 346
 347         DBG(HFCUSB_DBG_STATES,
 348             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 349
 350         hfc->l1_activated = 0;
 351         handle_led(hfc, LED_S0_OFF);
 352         /* deactivate : */
 353         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 354         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 355 }
 356
 357 /* ISDN l1 timer T4 expires */
 358 static void
 359 l1_timer_expire_t4(hfcusb_data * hfc)
 360 {
 361         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 362                            NULL);
 363
 364         DBG(HFCUSB_DBG_STATES,
 365             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 366
 367         hfc->l1_activated = 0;
 368         handle_led(hfc, LED_S0_OFF);
 369 }
 370
 371 /* S0 state changed */
 372 static void
 373 s0_state_handler(hfcusb_data * hfc, __u8 state)
 374 {
 375         __u8 old_state;
 376
 377         old_state = hfc->l1_state;
 378         if (state == old_state || state < 1 || state > 8)
 379                 return;
 380
 381         DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
 382             old_state, state);
 383
 384         if (state < 4 || state == 7 || state == 8) {
 385                 if (timer_pending(&hfc->t3_timer))
 386                         del_timer(&hfc->t3_timer);
 387                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
 388         }
 389         if (state >= 7) {
 390                 if (timer_pending(&hfc->t4_timer))
 391                         del_timer(&hfc->t4_timer);
 392                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
 393         }
 394
 395         if (state == 7 && !hfc->l1_activated) {
 396                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 397                                    PH_ACTIVATE | INDICATION, NULL);
 398                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 399                 hfc->l1_activated = 1;
 400                 handle_led(hfc, LED_S0_ON);
 401         } else if (state <= 3 /* && activated */ ) {
 402                 if (old_state == 7 || old_state == 8) {
 403                         DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
 404                         if (!timer_pending(&hfc->t4_timer)) {
 405                                 hfc->t4_timer.expires =
 406                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 407                                 add_timer(&hfc->t4_timer);
 408                         }
 409                 } else {
 410                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 411                                            PH_DEACTIVATE | INDICATION,
 412                                            NULL);
 413                         DBG(HFCUSB_DBG_STATES,
 414                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 415                         hfc->l1_activated = 0;
 416                         handle_led(hfc, LED_S0_OFF);
 417                 }
 418         }
 419         hfc->l1_state = state;
 420 }
 421
 422 static void
 423 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 424               void *buf, int num_packets, int packet_size, int interval,
 425               usb_complete_t complete, void *context)
 426 {
 427         int k;
 428
 429         urb->dev = dev;
 430         urb->pipe = pipe;
 431         urb->complete = complete;
 432         urb->number_of_packets = num_packets;
 433         urb->transfer_buffer_length = packet_size * num_packets;
 434         urb->context = context;
 435         urb->transfer_buffer = buf;
 436         urb->transfer_flags = URB_ISO_ASAP;
 437         urb->actual_length = 0;
 438         urb->interval = interval;
 439         for (k = 0; k < num_packets; k++) {
 440                 urb->iso_frame_desc[k].offset = packet_size * k;
 441                 urb->iso_frame_desc[k].length = packet_size;
 442                 urb->iso_frame_desc[k].actual_length = 0;
 443         }
 444 }
 445
 446 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 447  * gaps in the transfer chain
 448  */
 449 static int
 450 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
 451                  usb_complete_t complete, int packet_size)
 452 {
 453         int i, k, errcode;
 454
 455         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 456             fifo->fifonum);
 457
 458         /* allocate Memory for Iso out Urbs */
 459         for (i = 0; i < 2; i++) {
 460                 if (!(fifo->iso[i].purb)) {
 461                         fifo->iso[i].purb =
 462                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 463                         if (!(fifo->iso[i].purb)) {
 464                                 printk(KERN_INFO
 465                                        "alloc urb for fifo %i failed!!!",
 466                                        fifo->fifonum);
 467                         }
 468                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 469
 470                         /* Init the first iso */
 471                         if (ISO_BUFFER_SIZE >=
 472                             (fifo->usb_packet_maxlen *
 473                              num_packets_per_urb)) {
 474                                 fill_isoc_urb(fifo->iso[i].purb,
 475                                               fifo->hfc->dev, fifo->pipe,
 476                                               fifo->iso[i].buffer,
 477                                               num_packets_per_urb,
 478                                               fifo->usb_packet_maxlen,
 479                                               fifo->intervall, complete,
 480                                               &fifo->iso[i]);
 481                                 memset(fifo->iso[i].buffer, 0,
 482                                        sizeof(fifo->iso[i].buffer));
 483                                 /* defining packet delimeters in fifo->buffer */
 484                                 for (k = 0; k < num_packets_per_urb; k++) {
 485                                         fifo->iso[i].purb->
 486                                             iso_frame_desc[k].offset =
 487                                             k * packet_size;
 488                                         fifo->iso[i].purb->
 489                                             iso_frame_desc[k].length =
 490                                             packet_size;
 491                                 }
 492                         } else {
 493                                 printk(KERN_INFO
 494                                        "HFC-S USB: ISO Buffer size to small!\n");
 495                         }
 496                 }
 497                 fifo->bit_line = BITLINE_INF;
 498
 499                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 500                 fifo->active = (errcode >= 0) ? 1 : 0;
 501                 if (errcode < 0)
 502                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 503                                i, errcode, symbolic(urb_errlist, errcode));
 504         }
 505         return (fifo->active);
 506 }
 507
 508 /* stops running iso chain and frees their pending urbs */
 509 static void
 510 stop_isoc_chain(usb_fifo * fifo)
 511 {
 512         int i;
 513
 514         for (i = 0; i < 2; i++) {
 515                 if (fifo->iso[i].purb) {
 516                         DBG(HFCUSB_DBG_INIT,
 517                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 518                             fifo->fifonum, i);
 519                         usb_kill_urb(fifo->iso[i].purb);
 520                         usb_free_urb(fifo->iso[i].purb);
 521                         fifo->iso[i].purb = NULL;
 522                 }
 523         }
 524
 525         usb_kill_urb(fifo->urb);
 526         usb_free_urb(fifo->urb);
 527         fifo->urb = NULL;
 528         fifo->active = 0;
 529 }
 530
 531 /* defines how much ISO packets are handled in one URB */
 532 static int iso_packets[8] =
 533     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 534         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 535 };
 536
 537 static void
 538 tx_iso_complete(struct urb *urb)
 539 {
 540         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 541         usb_fifo *fifo = context_iso_urb->owner_fifo;
 542         hfcusb_data *hfc = fifo->hfc;
 543         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 544             errcode;
 545         int frame_complete, transp_mode, fifon, status;
 546         __u8 threshbit;
 547
 548         fifon = fifo->fifonum;
 549         status = urb->status;
 550
 551         tx_offset = 0;
 552
 553         /* ISO transfer only partially completed,
 554            look at individual frame status for details */
 555         if (status == -EXDEV) {
 556                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 557                     ", urb->status %d, fifonum %d\n",
 558                     status, fifon);
 559
 560                 for (k = 0; k < iso_packets[fifon]; ++k) {
 561                         errcode = urb->iso_frame_desc[k].status;
 562                         if (errcode)
 563                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 564                                        "packet %i, status: %i\n",
 565                                        k, errcode);
 566                 }
 567
 568                 // clear status, so go on with ISO transfers
 569                 status = 0;
 570         }
 571
 572         if (fifo->active && !status) {
 573                 transp_mode = 0;
 574                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 575                         transp_mode = 1;
 576
 577                 /* is FifoFull-threshold set for our channel? */
 578                 threshbit = (hfc->threshold_mask & (1 << fifon));
 579                 num_isoc_packets = iso_packets[fifon];
 580
 581                 /* predict dataflow to avoid fifo overflow */
 582                 if (fifon >= HFCUSB_D_TX) {
 583                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 584                 } else {
 585                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 586                 }
 587                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 588                               context_iso_urb->buffer, num_isoc_packets,
 589                               fifo->usb_packet_maxlen, fifo->intervall,
 590                               tx_iso_complete, urb->context);
 591                 memset(context_iso_urb->buffer, 0,
 592                        sizeof(context_iso_urb->buffer));
 593                 frame_complete = 0;
 594
 595                 /* Generate next ISO Packets */
 596                 for (k = 0; k < num_isoc_packets; ++k) {
 597                         if (fifo->skbuff) {
 598                                 len = fifo->skbuff->len;
 599                                 /* we lower data margin every msec */
 600                                 fifo->bit_line -= sink;
 601                                 current_len = (0 - fifo->bit_line) / 8;
 602                                 /* maximum 15 byte for every ISO packet makes our life easier */
 603                                 if (current_len > 14)
 604                                         current_len = 14;
 605                                 current_len =
 606                                     (len <=
 607                                      current_len) ? len : current_len;
 608                                 /* how much bit do we put on the line? */
 609                                 fifo->bit_line += current_len * 8;
 610
 611                                 context_iso_urb->buffer[tx_offset] = 0;
 612                                 if (current_len == len) {
 613                                         if (!transp_mode) {
 614                                                 /* here frame completion */
 615                                                 context_iso_urb->
 616                                                     buffer[tx_offset] = 1;
 617                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 618                                                 fifo->bit_line += 32;
 619                                         }
 620                                         frame_complete = 1;
 621                                 }
 622
 623                                 memcpy(context_iso_urb->buffer +
 624                                        tx_offset + 1, fifo->skbuff->data,
 625                                        current_len);
 626                                 skb_pull(fifo->skbuff, current_len);
 627
 628                                 /* define packet delimeters within the URB buffer */
 629                                 urb->iso_frame_desc[k].offset = tx_offset;
 630                                 urb->iso_frame_desc[k].length =
 631                                     current_len + 1;
 632
 633                                 tx_offset += (current_len + 1);
 634                         } else {
 635                                 urb->iso_frame_desc[k].offset =
 636                                     tx_offset++;
 637
 638                                 urb->iso_frame_desc[k].length = 1;
 639                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 640
 641                                 if (fifo->bit_line < BITLINE_INF) {
 642                                         fifo->bit_line = BITLINE_INF;
 643                                 }
 644                         }
 645
 646                         if (frame_complete) {
 647                                 fifo->delete_flg = 1;
 648                                 fifo->hif->l1l2(fifo->hif,
 649                                                 PH_DATA | CONFIRM,
 650                                                 (void *) (unsigned long) fifo->skbuff->
 651                                                 truesize);
 652                                 if (fifo->skbuff && fifo->delete_flg) {
 653                                         dev_kfree_skb_any(fifo->skbuff);
 654                                         fifo->skbuff = NULL;
 655                                         fifo->delete_flg = 0;
 656                                 }
 657                                 frame_complete = 0;
 658                         }
 659                 }
 660                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 661                 if (errcode < 0) {
 662                         printk(KERN_INFO
 663                                "HFC-S USB: error submitting ISO URB: %d\n",
 664                                errcode);
 665                 }
 666         } else {
 667                 if (status && !hfc->disc_flag) {
 668                         printk(KERN_INFO
 669                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 670                                status, symbolic(urb_errlist, status), fifon);
 671                 }
 672         }
 673 }
 674
 675 static void
 676 rx_iso_complete(struct urb *urb)
 677 {
 678         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 679         usb_fifo *fifo = context_iso_urb->owner_fifo;
 680         hfcusb_data *hfc = fifo->hfc;
 681         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 682             status;
 683         unsigned int iso_status;
 684         __u8 *buf;
 685         static __u8 eof[8];
 686
 687         fifon = fifo->fifonum;
 688         status = urb->status;
 689
 690         if (urb->status == -EOVERFLOW) {
 691                 DBG(HFCUSB_DBG_VERBOSE_USB,
 692                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 693                 status = 0;
 694         }
 695
 696         /* ISO transfer only partially completed,
 697            look at individual frame status for details */
 698         if (status == -EXDEV) {
 699                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 700                     "urb->status %d, fifonum %d\n",
 701                     status, fifon);
 702                 status = 0;
 703         }
 704
 705         if (fifo->active && !status) {
 706                 num_isoc_packets = iso_packets[fifon];
 707                 maxlen = fifo->usb_packet_maxlen;
 708                 for (k = 0; k < num_isoc_packets; ++k) {
 709                         len = urb->iso_frame_desc[k].actual_length;
 710                         offset = urb->iso_frame_desc[k].offset;
 711                         buf = context_iso_urb->buffer + offset;
 712                         iso_status = urb->iso_frame_desc[k].status;
 713
 714                         if (iso_status && !hfc->disc_flag)
 715                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 716                                     "HFC-S USB: rx_iso_complete "
 717                                     "ISO packet %i, status: %i\n",
 718                                     k, iso_status);
 719
 720                         if (fifon == HFCUSB_D_RX) {
 721                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 722                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 723                                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 724                                        fifo->last_urblen, len, maxlen,
 725                                        eof[5]);
 726
 727                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 728                         }
 729
 730                         if (fifo->last_urblen != maxlen) {
 731                                 /* the threshold mask is in the 2nd status byte */
 732                                 hfc->threshold_mask = buf[1];
 733                                 /* care for L1 state only for D-Channel
 734                                    to avoid overlapped iso completions */
 735                                 if (fifon == HFCUSB_D_RX) {
 736                                         /* the S0 state is in the upper half
 737                                            of the 1st status byte */
 738                                         s0_state_handler(hfc, buf[0] >> 4);
 739                                 }
 740                                 eof[fifon] = buf[0] & 1;
 741                                 if (len > 2)
 742                                         collect_rx_frame(fifo, buf + 2,
 743                                                          len - 2,
 744                                                          (len < maxlen) ?
 745                                                          eof[fifon] : 0);
 746                         } else {
 747                                 collect_rx_frame(fifo, buf, len,
 748                                                  (len <
 749                                                   maxlen) ? eof[fifon] :
 750                                                  0);
 751                         }
 752                         fifo->last_urblen = len;
 753                 }
 754
 755                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 756                               context_iso_urb->buffer, num_isoc_packets,
 757                               fifo->usb_packet_maxlen, fifo->intervall,
 758                               rx_iso_complete, urb->context);
 759                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 760                 if (errcode < 0) {
 761                         printk(KERN_ERR
 762                                "HFC-S USB: error submitting ISO URB: %d\n",
 763                                errcode);
 764                 }
 765         } else {
 766                 if (status && !hfc->disc_flag) {
 767                         printk(KERN_ERR
 768                                "HFC-S USB: rx_iso_complete : "
 769                                "urb->status %d, fifonum %d\n",
 770                                status, fifon);
 771                 }
 772         }
 773 }
 774
 775 /* collect rx data from INT- and ISO-URBs  */
 776 static void
 777 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 778 {
 779         hfcusb_data *hfc = fifo->hfc;
 780         int transp_mode, fifon;
 781
 782         fifon = fifo->fifonum;
 783         transp_mode = 0;
 784         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 785                 transp_mode = 1;
 786
 787         if (!fifo->skbuff) {
 788                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 789                 if (!fifo->skbuff) {
 790                         printk(KERN_ERR
 791                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 792                                fifon);
 793                         return;
 794                 }
 795         }
 796         if (len) {
 797                 if (fifo->skbuff->len + len < fifo->max_size) {
 798                         memcpy(skb_put(fifo->skbuff, len), data, len);
 799                 } else {
 800                         DBG(HFCUSB_DBG_FIFO_ERR,
 801                                "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 802                                fifo->max_size, fifon);
 803                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 804                         skb_trim(fifo->skbuff, 0);
 805                 }
 806         }
 807         if (transp_mode && fifo->skbuff->len >= 128) {
 808                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 809                                 fifo->skbuff);
 810                 fifo->skbuff = NULL;
 811                 return;
 812         }
 813         /* we have a complete hdlc packet */
 814         if (finish) {
 815                 if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
 816                     && (fifo->skbuff->len > 3)) {
 817
 818                         if (fifon == HFCUSB_D_RX) {
 819                                 DBG(HFCUSB_DBG_DCHANNEL,
 820                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 821                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 822                         }
 823
 824                         /* remove CRC & status */
 825                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 826                         if (fifon == HFCUSB_PCM_RX) {
 827                                 fifo->hif->l1l2(fifo->hif,
 828                                                 PH_DATA_E | INDICATION,
 829                                                 fifo->skbuff);
 830                         } else
 831                                 fifo->hif->l1l2(fifo->hif,
 832                                                 PH_DATA | INDICATION,
 833                                                 fifo->skbuff);
 834                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 835                 } else {
 836                         DBG(HFCUSB_DBG_FIFO_ERR,
 837                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 838                             fifo->skbuff->len, fifon);
 839                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 840                         skb_trim(fifo->skbuff, 0);
 841                 }
 842         }
 843 }
 844
 845 static void
 846 rx_int_complete(struct urb *urb)
 847 {
 848         int len;
 849         int status;
 850         __u8 *buf, maxlen, fifon;
 851         usb_fifo *fifo = (usb_fifo *) urb->context;
 852         hfcusb_data *hfc = fifo->hfc;
 853         static __u8 eof[8];
 854
 855         urb->dev = hfc->dev;    /* security init */
 856
 857         fifon = fifo->fifonum;
 858         if ((!fifo->active) || (urb->status)) {
 859                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 860                     fifon, urb->status);
 861
 862                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 863                 if (fifo->skbuff) {
 864                         dev_kfree_skb_any(fifo->skbuff);
 865                         fifo->skbuff = NULL;
 866                 }
 867                 return;
 868         }
 869         len = urb->actual_length;
 870         buf = fifo->buffer;
 871         maxlen = fifo->usb_packet_maxlen;
 872
 873         if (fifon == HFCUSB_D_RX) {
 874                 DBG(HFCUSB_DBG_VERBOSE_USB,
 875                        "HFC-S USB: INT-D-RX lst_urblen:%2d "
 876                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 877                        fifo->last_urblen, len, maxlen,
 878                        eof[5]);
 879                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 880         }
 881
 882         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 883                 /* the threshold mask is in the 2nd status byte */
 884                 hfc->threshold_mask = buf[1];
 885                 /* the S0 state is in the upper half of the 1st status byte */
 886                 s0_state_handler(hfc, buf[0] >> 4);
 887                 eof[fifon] = buf[0] & 1;
 888                 /* if we have more than the 2 status bytes -> collect data */
 889                 if (len > 2)
 890                         collect_rx_frame(fifo, buf + 2,
 891                                          urb->actual_length - 2,
 892                                          (len < maxlen) ? eof[fifon] : 0);
 893         } else {
 894                 collect_rx_frame(fifo, buf, urb->actual_length,
 895                                  (len < maxlen) ? eof[fifon] : 0);
 896         }
 897         fifo->last_urblen = urb->actual_length;
 898         status = usb_submit_urb(urb, GFP_ATOMIC);
 899         if (status) {
 900                 printk(KERN_INFO
 901                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 902                        __FUNCTION__, fifon);
 903         }
 904 }
 905
 906 /* start initial INT-URB for certain fifo */
 907 static void
 908 start_int_fifo(usb_fifo * fifo)
 909 {
 910         int errcode;
 911
 912         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 913             fifo->fifonum);
 914
 915         if (!fifo->urb) {
 916                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 917                 if (!fifo->urb)
 918                         return;
 919         }
 920         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 921                          fifo->buffer, fifo->usb_packet_maxlen,
 922                          rx_int_complete, fifo, fifo->intervall);
 923         fifo->active = 1;       /* must be marked active */
 924         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 925         if (errcode) {
 926                 printk(KERN_ERR
 927                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
 928                        errcode);
 929                 fifo->active = 0;
 930                 fifo->skbuff = NULL;
 931         }
 932 }
 933
 934 static void
 935 setup_bchannel(hfcusb_data * hfc, int channel, int mode)
 936 {
 937         __u8 val, idx_table[2] = { 0, 2 };
 938
 939         if (hfc->disc_flag) {
 940                 return;
 941         }
 942         DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
 943             channel, mode);
 944         hfc->b_mode[channel] = mode;
 945
 946         /* setup CON_HDLC */
 947         val = 0;
 948         if (mode != L1_MODE_NULL)
 949                 val = 8;        /* enable fifo? */
 950         if (mode == L1_MODE_TRANS)
 951                 val |= 2;       /* set transparent bit */
 952
 953         /* set FIFO to transmit register */
 954         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
 955         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 956         /* reset fifo */
 957         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 958         /* set FIFO to receive register */
 959         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
 960         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 961         /* reset fifo */
 962         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 963
 964         val = 0x40;
 965         if (hfc->b_mode[0])
 966                 val |= 1;
 967         if (hfc->b_mode[1])
 968                 val |= 2;
 969         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
 970
 971         val = 0;
 972         if (hfc->b_mode[0])
 973                 val |= 1;
 974         if (hfc->b_mode[1])
 975                 val |= 2;
 976         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
 977
 978         if (mode == L1_MODE_NULL) {
 979                 if (channel)
 980                         handle_led(hfc, LED_B2_OFF);
 981                 else
 982                         handle_led(hfc, LED_B1_OFF);
 983         } else {
 984                 if (channel)
 985                         handle_led(hfc, LED_B2_ON);
 986                 else
 987                         handle_led(hfc, LED_B1_ON);
 988         }
 989 }
 990
 991 static void
 992 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
 993 {
 994         usb_fifo *fifo = my_hisax_if->priv;
 995         hfcusb_data *hfc = fifo->hfc;
 996
 997         switch (pr) {
 998                 case PH_ACTIVATE | REQUEST:
 999                         if (fifo->fifonum == HFCUSB_D_TX) {
1000                                 DBG(HFCUSB_DBG_STATES,
1001                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1002
1003                                 if (hfc->l1_state != 3
1004                                     && hfc->l1_state != 7) {
1005                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1006                                                            PH_DEACTIVATE |
1007                                                            INDICATION,
1008                                                            NULL);
1009                                         DBG(HFCUSB_DBG_STATES,
1010                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1011                                 } else {
1012                                         if (hfc->l1_state == 7) {       /* l1 already active */
1013                                                 hfc->d_if.ifc.l1l2(&hfc->
1014                                                                    d_if.
1015                                                                    ifc,
1016                                                                    PH_ACTIVATE
1017                                                                    |
1018                                                                    INDICATION,
1019                                                                    NULL);
1020                                                 DBG(HFCUSB_DBG_STATES,
1021                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1022                                         } else {
1023                                                 /* force sending sending INFO1 */
1024                                                 queue_control_request(hfc,
1025                                                                       HFCUSB_STATES,
1026                                                                       0x14,
1027                                                                       1);
1028                                                 mdelay(1);
1029                                                 /* start l1 activation */
1030                                                 queue_control_request(hfc,
1031                                                                       HFCUSB_STATES,
1032                                                                       0x04,
1033                                                                       1);
1034                                                 if (!timer_pending
1035                                                     (&hfc->t3_timer)) {
1036                                                         hfc->t3_timer.
1037                                                             expires =
1038                                                             jiffies +
1039                                                             (HFC_TIMER_T3 *
1040                                                              HZ) / 1000;
1041                                                         add_timer(&hfc->
1042                                                                   t3_timer);
1043                                                 }
1044                                         }
1045                                 }
1046                         } else {
1047                                 DBG(HFCUSB_DBG_STATES,
1048                                     "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1049                                 setup_bchannel(hfc,
1050                                             (fifo->fifonum ==
1051                                              HFCUSB_B1_TX) ? 0 : 1,
1052                                             (long) arg);
1053                                 fifo->hif->l1l2(fifo->hif,
1054                                                 PH_ACTIVATE | INDICATION,
1055                                                 NULL);
1056                         }
1057                         break;
1058                 case PH_DEACTIVATE | REQUEST:
1059                         if (fifo->fifonum == HFCUSB_D_TX) {
1060                                 DBG(HFCUSB_DBG_STATES,
1061                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1062                         } else {
1063                                 DBG(HFCUSB_DBG_STATES,
1064                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1065                                 setup_bchannel(hfc,
1066                                             (fifo->fifonum ==
1067                                              HFCUSB_B1_TX) ? 0 : 1,
1068                                             (int) L1_MODE_NULL);
1069                                 fifo->hif->l1l2(fifo->hif,
1070                                                 PH_DEACTIVATE | INDICATION,
1071                                                 NULL);
1072                         }
1073                         break;
1074                 case PH_DATA | REQUEST:
1075                         if (fifo->skbuff && fifo->delete_flg) {
1076                                 dev_kfree_skb_any(fifo->skbuff);
1077                                 fifo->skbuff = NULL;
1078                                 fifo->delete_flg = 0;
1079                         }
1080                         fifo->skbuff = arg;     /* we have a new buffer */
1081                         break;
1082                 default:
1083                         DBG(HFCUSB_DBG_STATES,
1084                                "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x", pr);
1085                         break;
1086         }
1087 }
1088
1089 /* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1090 static int
1091 hfc_usb_init(hfcusb_data * hfc)
1092 {
1093         usb_fifo *fifo;
1094         int i, err;
1095         u_char b;
1096         struct hisax_b_if *p_b_if[2];
1097
1098         /* check the chip id */
1099         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1100                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1101                 return (1);
1102         }
1103         if (b != HFCUSB_CHIPID) {
1104                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1105                 return (1);
1106         }
1107
1108         /* first set the needed config, interface and alternate */
1109         err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1110
1111         /* do Chip reset */
1112         write_usb(hfc, HFCUSB_CIRM, 8);
1113         /* aux = output, reset off */
1114         write_usb(hfc, HFCUSB_CIRM, 0x10);
1115
1116         /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1117         write_usb(hfc, HFCUSB_USB_SIZE,
1118                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1119
1120         /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1121         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1122
1123         /* enable PCM/GCI master mode */
1124         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1125         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1126
1127         /* init the fifos */
1128         write_usb(hfc, HFCUSB_F_THRES,
1129                   (HFCUSB_TX_THRESHOLD /
1130                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1131
1132         fifo = hfc->fifos;
1133         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1134                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1135                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1136                 fifo[i].max_size =
1137                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1138                 fifo[i].last_urblen = 0;
1139                 /* set 2 bit for D- & E-channel */
1140                 write_usb(hfc, HFCUSB_HDLC_PAR,
1141                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1142                 /* rx hdlc, enable IFF for D-channel */
1143                 write_usb(hfc, HFCUSB_CON_HDLC,
1144                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1145                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1146         }
1147
1148         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1149         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1150         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1151
1152         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1153         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1154
1155         /* set both B-channel to not connected */
1156         hfc->b_mode[0] = L1_MODE_NULL;
1157         hfc->b_mode[1] = L1_MODE_NULL;
1158
1159         hfc->l1_activated = 0;
1160         hfc->disc_flag = 0;
1161         hfc->led_state = 0;
1162         hfc->led_new_data = 0;
1163         hfc->old_led_state = 0;
1164
1165         /* init the t3 timer */
1166         init_timer(&hfc->t3_timer);
1167         hfc->t3_timer.data = (long) hfc;
1168         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1169
1170         /* init the t4 timer */
1171         init_timer(&hfc->t4_timer);
1172         hfc->t4_timer.data = (long) hfc;
1173         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1174
1175         /* init the background machinery for control requests */
1176         hfc->ctrl_read.bRequestType = 0xc0;
1177         hfc->ctrl_read.bRequest = 1;
1178         hfc->ctrl_read.wLength = cpu_to_le16(1);
1179         hfc->ctrl_write.bRequestType = 0x40;
1180         hfc->ctrl_write.bRequest = 0;
1181         hfc->ctrl_write.wLength = 0;
1182         usb_fill_control_urb(hfc->ctrl_urb,
1183                              hfc->dev,
1184                              hfc->ctrl_out_pipe,
1185                              (u_char *) & hfc->ctrl_write,
1186                              NULL, 0, ctrl_complete, hfc);
1187         /* Init All Fifos */
1188         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1189                 hfc->fifos[i].iso[0].purb = NULL;
1190                 hfc->fifos[i].iso[1].purb = NULL;
1191                 hfc->fifos[i].active = 0;
1192         }
1193         /* register Modul to upper Hisax Layers */
1194         hfc->d_if.owner = THIS_MODULE;
1195         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1196         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1197         for (i = 0; i < 2; i++) {
1198                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1199                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1200                 p_b_if[i] = &hfc->b_if[i];
1201         }
1202         /* default Prot: EURO ISDN, should be a module_param */
1203         hfc->protocol = 2;
1204         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1205         if (i) {
1206                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1207                 return i;
1208         }
1209
1210 #ifdef CONFIG_HISAX_DEBUG
1211         hfc_debug = debug;
1212 #endif
1213
1214         for (i = 0; i < 4; i++)
1215                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1216         for (i = 4; i < 8; i++)
1217                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1218
1219         /* 3 (+1) INT IN + 3 ISO OUT */
1220         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1221                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1222                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1223                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1224                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1225                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1226         }
1227         /* 3 (+1) ISO IN + 3 ISO OUT */
1228         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1229                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1230                                  rx_iso_complete, 16);
1231                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1232                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1233                                          ISOC_PACKETS_D, rx_iso_complete,
1234                                          16);
1235                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1236                                  rx_iso_complete, 16);
1237                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1238                                  rx_iso_complete, 16);
1239         }
1240
1241         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1242                          tx_iso_complete, 1);
1243         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1244                          tx_iso_complete, 1);
1245         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1246                          tx_iso_complete, 1);
1247
1248         handle_led(hfc, LED_POWER_ON);
1249
1250         return (0);
1251 }
1252
1253 /* initial callback for each plugged USB device */
1254 static int
1255 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1256 {
1257         struct usb_device *dev = interface_to_usbdev(intf);
1258         hfcusb_data *context;
1259         struct usb_host_interface *iface = intf->cur_altsetting;
1260         struct usb_host_interface *iface_used = NULL;
1261         struct usb_host_endpoint *ep;
1262         int ifnum = iface->desc.bInterfaceNumber;
1263         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1264             attr, cfg_found, cidx, ep_addr;
1265         int cmptbl[16], small_match, iso_packet_size, packet_size,
1266             alt_used = 0;
1267         hfcsusb_vdata *driver_info;
1268
1269         vend_idx = 0xffff;
1270         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1271                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1272                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1273                         vend_idx = i;
1274                         continue;
1275                 }
1276         }
1277
1278         printk(KERN_INFO
1279                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1280                ifnum, iface->desc.bAlternateSetting, intf->minor);
1281
1282         if (vend_idx != 0xffff) {
1283                 /* if vendor and product ID is OK, start probing alternate settings */
1284                 alt_idx = 0;
1285                 small_match = 0xffff;
1286
1287                 /* default settings */
1288                 iso_packet_size = 16;
1289                 packet_size = 64;
1290
1291                 while (alt_idx < intf->num_altsetting) {
1292                         iface = intf->altsetting + alt_idx;
1293                         probe_alt_setting = iface->desc.bAlternateSetting;
1294                         cfg_used = 0;
1295
1296                         /* check for config EOL element */
1297                         while (validconf[cfg_used][0]) {
1298                                 cfg_found = 1;
1299                                 vcf = validconf[cfg_used];
1300                                 /* first endpoint descriptor */
1301                                 ep = iface->endpoint;
1302
1303                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1304
1305                                 /* check for all endpoints in this alternate setting */
1306                                 for (i = 0; i < iface->desc.bNumEndpoints;
1307                                      i++) {
1308                                         ep_addr =
1309                                             ep->desc.bEndpointAddress;
1310                                         /* get endpoint base */
1311                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1312                                         if (ep_addr & 0x80)
1313                                                 idx++;
1314                                         attr = ep->desc.bmAttributes;
1315                                         if (cmptbl[idx] == EP_NUL) {
1316                                                 cfg_found = 0;
1317                                         }
1318                                         if (attr == USB_ENDPOINT_XFER_INT
1319                                             && cmptbl[idx] == EP_INT)
1320                                                 cmptbl[idx] = EP_NUL;
1321                                         if (attr == USB_ENDPOINT_XFER_BULK
1322                                             && cmptbl[idx] == EP_BLK)
1323                                                 cmptbl[idx] = EP_NUL;
1324                                         if (attr == USB_ENDPOINT_XFER_ISOC
1325                                             && cmptbl[idx] == EP_ISO)
1326                                                 cmptbl[idx] = EP_NUL;
1327
1328                                         /* check if all INT endpoints match minimum interval */
1329                                         if ((attr == USB_ENDPOINT_XFER_INT)
1330                                             && (ep->desc.bInterval < vcf[17])) {
1331                                                 cfg_found = 0;
1332                                         }
1333                                         ep++;
1334                                 }
1335                                 for (i = 0; i < 16; i++) {
1336                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1337                                         if (cmptbl[i] != EP_NOP
1338                                             && cmptbl[i] != EP_NUL)
1339                                                 cfg_found = 0;
1340                                 }
1341                                 if (cfg_found) {
1342                                         if (cfg_used < small_match) {
1343                                                 small_match = cfg_used;
1344                                                 alt_used =
1345                                                     probe_alt_setting;
1346                                                 iface_used = iface;
1347                                         }
1348                                 }
1349                                 cfg_used++;
1350                         }
1351                         alt_idx++;
1352                 } /* (alt_idx < intf->num_altsetting) */
1353
1354                 /* found a valid USB Ta Endpint config */
1355                 if (small_match != 0xffff) {
1356                         iface = iface_used;
1357                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1358                                 return (-ENOMEM);       /* got no mem */
1359
1360                         ep = iface->endpoint;
1361                         vcf = validconf[small_match];
1362
1363                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1364                                 ep_addr = ep->desc.bEndpointAddress;
1365                                 /* get endpoint base */
1366                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1367                                 if (ep_addr & 0x80)
1368                                         idx++;
1369                                 cidx = idx & 7;
1370                                 attr = ep->desc.bmAttributes;
1371
1372                                 /* init Endpoints */
1373                                 if (vcf[idx] != EP_NOP
1374                                     && vcf[idx] != EP_NUL) {
1375                                         switch (attr) {
1376                                                 case USB_ENDPOINT_XFER_INT:
1377                                                         context->
1378                                                             fifos[cidx].
1379                                                             pipe =
1380                                                             usb_rcvintpipe
1381                                                             (dev,
1382                                                              ep->desc.
1383                                                              bEndpointAddress);
1384                                                         context->
1385                                                             fifos[cidx].
1386                                                             usb_transfer_mode
1387                                                             = USB_INT;
1388                                                         packet_size =
1389                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1390                                                         break;
1391                                                 case USB_ENDPOINT_XFER_BULK:
1392                                                         if (ep_addr & 0x80)
1393                                                                 context->
1394                                                                     fifos
1395                                                                     [cidx].
1396                                                                     pipe =
1397                                                                     usb_rcvbulkpipe
1398                                                                     (dev,
1399                                                                      ep->
1400                                                                      desc.
1401                                                                      bEndpointAddress);
1402                                                         else
1403                                                                 context->
1404                                                                     fifos
1405                                                                     [cidx].
1406                                                                     pipe =
1407                                                                     usb_sndbulkpipe
1408                                                                     (dev,
1409                                                                      ep->
1410                                                                      desc.
1411                                                                      bEndpointAddress);
1412                                                         context->
1413                                                             fifos[cidx].
1414                                                             usb_transfer_mode
1415                                                             = USB_BULK;
1416                                                         packet_size =
1417                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1418                                                         break;
1419                                                 case USB_ENDPOINT_XFER_ISOC:
1420                                                         if (ep_addr & 0x80)
1421                                                                 context->
1422                                                                     fifos
1423                                                                     [cidx].
1424                                                                     pipe =
1425                                                                     usb_rcvisocpipe
1426                                                                     (dev,
1427                                                                      ep->
1428                                                                      desc.
1429                                                                      bEndpointAddress);
1430                                                         else
1431                                                                 context->
1432                                                                     fifos
1433                                                                     [cidx].
1434                                                                     pipe =
1435                                                                     usb_sndisocpipe
1436                                                                     (dev,
1437                                                                      ep->
1438                                                                      desc.
1439                                                                      bEndpointAddress);
1440                                                         context->
1441                                                             fifos[cidx].
1442                                                             usb_transfer_mode
1443                                                             = USB_ISOC;
1444                                                         iso_packet_size =
1445                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1446                                                         break;
1447                                                 default:
1448                                                         context->
1449                                                             fifos[cidx].
1450                                                             pipe = 0;
1451                                         }       /* switch attribute */
1452
1453                                         if (context->fifos[cidx].pipe) {
1454                                                 context->fifos[cidx].
1455                                                     fifonum = cidx;
1456                                                 context->fifos[cidx].hfc =
1457                                                     context;
1458                                                 context->fifos[cidx].usb_packet_maxlen =
1459                                                     le16_to_cpu(ep->desc.wMaxPacketSize);
1460                                                 context->fifos[cidx].
1461                                                     intervall =
1462                                                     ep->desc.bInterval;
1463                                                 context->fifos[cidx].
1464                                                     skbuff = NULL;
1465                                         }
1466                                 }
1467                                 ep++;
1468                         }
1469                         context->dev = dev;     /* save device */
1470                         context->if_used = ifnum;       /* save used interface */
1471                         context->alt_used = alt_used;   /* and alternate config */
1472                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1473                         context->cfg_used = vcf[16];    /* store used config */
1474                         context->vend_idx = vend_idx;   /* store found vendor */
1475                         context->packet_size = packet_size;
1476                         context->iso_packet_size = iso_packet_size;
1477
1478                         /* create the control pipes needed for register access */
1479                         context->ctrl_in_pipe =
1480                             usb_rcvctrlpipe(context->dev, 0);
1481                         context->ctrl_out_pipe =
1482                             usb_sndctrlpipe(context->dev, 0);
1483                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1484
1485                         driver_info =
1486                             (hfcsusb_vdata *) hfcusb_idtab[vend_idx].
1487                             driver_info;
1488                         printk(KERN_INFO "HFC-S USB: detected \"%s\"\n",
1489                                driver_info->vend_name);
1490
1491                         DBG(HFCUSB_DBG_INIT,
1492                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1493                             conf_str[small_match], context->if_used,
1494                             context->alt_used,
1495                             validconf[small_match][18]);
1496
1497                         /* init the chip and register the driver */
1498                         if (hfc_usb_init(context)) {
1499                                 usb_kill_urb(context->ctrl_urb);
1500                                 usb_free_urb(context->ctrl_urb);
1501                                 context->ctrl_urb = NULL;
1502                                 kfree(context);
1503                                 return (-EIO);
1504                         }
1505                         usb_set_intfdata(intf, context);
1506                         return (0);
1507                 }
1508         } else {
1509                 printk(KERN_INFO
1510                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1511         }
1512         return (-EIO);
1513 }
1514
1515 /* callback for unplugged USB device */
1516 static void
1517 hfc_usb_disconnect(struct usb_interface
1518                    *intf)
1519 {
1520         hfcusb_data *context = usb_get_intfdata(intf);
1521         int i;
1522
1523         handle_led(context, LED_POWER_OFF);
1524         schedule_timeout((10 * HZ) / 1000);
1525
1526         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1527         context->disc_flag = 1;
1528         usb_set_intfdata(intf, NULL);
1529         if (!context)
1530                 return;
1531         if (timer_pending(&context->t3_timer))
1532                 del_timer(&context->t3_timer);
1533         if (timer_pending(&context->t4_timer))
1534                 del_timer(&context->t4_timer);
1535
1536         /* tell all fifos to terminate */
1537         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1538                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1539                         if (context->fifos[i].active > 0) {
1540                                 stop_isoc_chain(&context->fifos[i]);
1541                                 DBG(HFCUSB_DBG_INIT,
1542                                     "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1543                                     __FUNCTION__, i);
1544                         }
1545                 } else {
1546                         if (context->fifos[i].active > 0) {
1547                                 context->fifos[i].active = 0;
1548                                 DBG(HFCUSB_DBG_INIT,
1549                                     "HFC-S USB: %s unlinking URB for Fifo(%i)",
1550                                     __FUNCTION__, i);
1551                         }
1552                         usb_kill_urb(context->fifos[i].urb);
1553                         usb_free_urb(context->fifos[i].urb);
1554                         context->fifos[i].urb = NULL;
1555                 }
1556                 context->fifos[i].active = 0;
1557         }
1558         usb_kill_urb(context->ctrl_urb);
1559         usb_free_urb(context->ctrl_urb);
1560         context->ctrl_urb = NULL;
1561         hisax_unregister(&context->d_if);
1562         kfree(context);         /* free our structure again */
1563 }
1564
1565 static struct usb_driver hfc_drv = {
1566         .name  = "hfc_usb",
1567         .id_table = hfcusb_idtab,
1568         .probe = hfc_usb_probe,
1569         .disconnect = hfc_usb_disconnect,
1570 };
1571
1572 static void __exit
1573 hfc_usb_mod_exit(void)
1574 {
1575         usb_deregister(&hfc_drv); /* release our driver */
1576         printk(KERN_INFO "HFC-S USB: module removed\n");
1577 }
1578
1579 static int __init
1580 hfc_usb_mod_init(void)
1581 {
1582         char revstr[30], datestr[30], dummy[30];
1583 #ifndef CONFIG_HISAX_DEBUG
1584         hfc_debug = debug;
1585 #endif
1586         sscanf(hfcusb_revision,
1587                "%s %s $ %s %s %s $ ", dummy, revstr,
1588                dummy, datestr, dummy);
1589         printk(KERN_INFO
1590                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1591                revstr, datestr, debug);
1592         if (usb_register(&hfc_drv)) {
1593                 printk(KERN_INFO
1594                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1595                 return (-1);    /* unable to register */
1596         }
1597         return (0);
1598 }
1599
1600 module_init(hfc_usb_mod_init);
1601 module_exit(hfc_usb_mod_exit);
1602 MODULE_AUTHOR(DRIVER_AUTHOR);
1603 MODULE_DESCRIPTION(DRIVER_DESC);
1604 MODULE_LICENSE("GPL");
1605 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);