drivers/isdn/hisax/hfc_usb.c

   1 /*
   2  * hfc_usb.c
   3  *
   4  * $Id: hfc_usb.c,v 2.3.2.24 2007/10/14 08:40:29 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/sched.h>
  41 #include <linux/moduleparam.h>
  42 #include <linux/slab.h>
  43 #include "hisax.h"
  44 #include "hisax_if.h"
  45 #include "hfc_usb.h"
  46
  47 static const char *hfcusb_revision =
  48     "$Revision: 2.3.2.24 $ $Date: 2007/10/14 08:40:29 $ ";
  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          USB_DEVICE(0x071d, 0x1005),
 131          .driver_info = (unsigned long) &((hfcsusb_vdata)
 132                           {LED_SCHEME1, {0x02, 0, 0x01, 0x04},
 133                            "Eicon DIVA USB 4.0"}),
 134         },
 135         { }
 136 };
 137
 138 /* structure defining input+output fifos (interrupt/bulk mode) */
 139 struct usb_fifo;                /* forward definition */
 140 typedef struct iso_urb_struct {
 141         struct urb *purb;
 142         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
 143         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
 144 } iso_urb_struct;
 145
 146 struct hfcusb_data;             /* forward definition */
 147
 148 typedef struct usb_fifo {
 149         int fifonum;            /* fifo index attached to this structure */
 150         int active;             /* fifo is currently active */
 151         struct hfcusb_data *hfc;        /* pointer to main structure */
 152         int pipe;               /* address of endpoint */
 153         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
 154         unsigned int max_size;  /* maximum size of receive/send packet */
 155         __u8 intervall;         /* interrupt interval */
 156         struct sk_buff *skbuff; /* actual used buffer */
 157         struct urb *urb;        /* transfer structure for usb routines */
 158         __u8 buffer[128];       /* buffer incoming/outgoing data */
 159         int bit_line;           /* how much bits are in the fifo? */
 160
 161         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
 162         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
 163         struct hisax_if *hif;   /* hisax interface */
 164         int delete_flg;         /* only delete skbuff once */
 165         int last_urblen;        /* remember length of last packet */
 166 } usb_fifo;
 167
 168 /* structure holding all data for one device */
 169 typedef struct hfcusb_data {
 170         /* HiSax Interface for loadable Layer1 drivers */
 171         struct hisax_d_if d_if;         /* see hisax_if.h */
 172         struct hisax_b_if b_if[2];      /* see hisax_if.h */
 173         int protocol;
 174
 175         struct usb_device *dev; /* our device */
 176         int if_used;            /* used interface number */
 177         int alt_used;           /* used alternate config */
 178         int ctrl_paksize;       /* control pipe packet size */
 179         int ctrl_in_pipe,       /* handles for control pipe */
 180             ctrl_out_pipe;
 181         int cfg_used;           /* configuration index used */
 182         int vend_idx;           /* vendor found */
 183         int b_mode[2];          /* B-channel mode */
 184         int l1_activated;       /* layer 1 activated */
 185         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
 186         int packet_size, iso_packet_size;
 187
 188         /* control pipe background handling */
 189         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
 190         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
 191         struct urb *ctrl_urb;   /* transfer structure for control channel */
 192
 193         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
 194         struct usb_ctrlrequest ctrl_read;       /* same for read request */
 195
 196         __u8 old_led_state, led_state;
 197
 198         volatile __u8 threshold_mask;   /* threshold actually reported */
 199         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
 200
 201         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
 202
 203         volatile __u8 l1_state; /* actual l1 state */
 204         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
 205         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
 206 } hfcusb_data;
 207
 208
 209 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
 210                              int finish);
 211
 212 static inline const char *
 213 symbolic(struct hfcusb_symbolic_list list[], const int num)
 214 {
 215         int i;
 216         for (i = 0; list[i].name != NULL; i++)
 217                 if (list[i].num == num)
 218                         return (list[i].name);
 219         return "<unknown ERROR>";
 220 }
 221
 222 static void
 223 ctrl_start_transfer(hfcusb_data * hfc)
 224 {
 225         if (hfc->ctrl_cnt) {
 226                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
 227                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
 228                 hfc->ctrl_urb->transfer_buffer = NULL;
 229                 hfc->ctrl_urb->transfer_buffer_length = 0;
 230                 hfc->ctrl_write.wIndex =
 231                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg);
 232                 hfc->ctrl_write.wValue =
 233                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val);
 234
 235                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
 236         }
 237 }                               /* ctrl_start_transfer */
 238
 239 static int
 240 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
 241 {
 242         ctrl_buft *buf;
 243
 244         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 245                 return (1);     /* no space left */
 246         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
 247         buf->hfc_reg = reg;
 248         buf->reg_val = val;
 249         buf->action = action;
 250         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 251                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
 252         if (++hfc->ctrl_cnt == 1)
 253                 ctrl_start_transfer(hfc);
 254         return (0);
 255 }
 256
 257 static void
 258 ctrl_complete(struct urb *urb)
 259 {
 260         hfcusb_data *hfc = (hfcusb_data *) urb->context;
 261
 262         urb->dev = hfc->dev;
 263         if (hfc->ctrl_cnt) {
 264                 hfc->ctrl_cnt--;        /* decrement actual count */
 265                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 266                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
 267
 268                 ctrl_start_transfer(hfc);       /* start next transfer */
 269         }
 270 }
 271
 272 /* write led data to auxport & invert if necessary */
 273 static void
 274 write_led(hfcusb_data * hfc, __u8 led_state)
 275 {
 276         if (led_state != hfc->old_led_state) {
 277                 hfc->old_led_state = led_state;
 278                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
 279         }
 280 }
 281
 282 static void
 283 set_led_bit(hfcusb_data * hfc, signed short led_bits, int on)
 284 {
 285         if (on) {
 286                 if (led_bits < 0)
 287                         hfc->led_state &= ~abs(led_bits);
 288                 else
 289                         hfc->led_state |= led_bits;
 290         } else {
 291                 if (led_bits < 0)
 292                         hfc->led_state |= abs(led_bits);
 293                 else
 294                         hfc->led_state &= ~led_bits;
 295         }
 296 }
 297
 298 /* handle LED requests */
 299 static void
 300 handle_led(hfcusb_data * hfc, int event)
 301 {
 302         hfcsusb_vdata *driver_info =
 303             (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;
 304
 305         /* if no scheme -> no LED action */
 306         if (driver_info->led_scheme == LED_OFF)
 307                 return;
 308
 309         switch (event) {
 310                 case LED_POWER_ON:
 311                         set_led_bit(hfc, driver_info->led_bits[0], 1);
 312                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 313                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 314                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 315                         break;
 316                 case LED_POWER_OFF:
 317                         set_led_bit(hfc, driver_info->led_bits[0], 0);
 318                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 319                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 320                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 321                         break;
 322                 case LED_S0_ON:
 323                         set_led_bit(hfc, driver_info->led_bits[1], 1);
 324                         break;
 325                 case LED_S0_OFF:
 326                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 327                         break;
 328                 case LED_B1_ON:
 329                         set_led_bit(hfc, driver_info->led_bits[2], 1);
 330                         break;
 331                 case LED_B1_OFF:
 332                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 333                         break;
 334                 case LED_B2_ON:
 335                         set_led_bit(hfc, driver_info->led_bits[3], 1);
 336                         break;
 337                 case LED_B2_OFF:
 338                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 339                         break;
 340         }
 341         write_led(hfc, hfc->led_state);
 342 }
 343
 344 /* ISDN l1 timer T3 expires */
 345 static void
 346 l1_timer_expire_t3(hfcusb_data * hfc)
 347 {
 348         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 349                            NULL);
 350
 351         DBG(HFCUSB_DBG_STATES,
 352             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 353
 354         hfc->l1_activated = 0;
 355         handle_led(hfc, LED_S0_OFF);
 356         /* deactivate : */
 357         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 358         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 359 }
 360
 361 /* ISDN l1 timer T4 expires */
 362 static void
 363 l1_timer_expire_t4(hfcusb_data * hfc)
 364 {
 365         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 366                            NULL);
 367
 368         DBG(HFCUSB_DBG_STATES,
 369             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 370
 371         hfc->l1_activated = 0;
 372         handle_led(hfc, LED_S0_OFF);
 373 }
 374
 375 /* S0 state changed */
 376 static void
 377 s0_state_handler(hfcusb_data * hfc, __u8 state)
 378 {
 379         __u8 old_state;
 380
 381         old_state = hfc->l1_state;
 382         if (state == old_state || state < 1 || state > 8)
 383                 return;
 384
 385         DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
 386             old_state, state);
 387
 388         if (state < 4 || state == 7 || state == 8) {
 389                 if (timer_pending(&hfc->t3_timer))
 390                         del_timer(&hfc->t3_timer);
 391                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
 392         }
 393         if (state >= 7) {
 394                 if (timer_pending(&hfc->t4_timer))
 395                         del_timer(&hfc->t4_timer);
 396                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
 397         }
 398
 399         if (state == 7 && !hfc->l1_activated) {
 400                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 401                                    PH_ACTIVATE | INDICATION, NULL);
 402                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 403                 hfc->l1_activated = 1;
 404                 handle_led(hfc, LED_S0_ON);
 405         } else if (state <= 3 /* && activated */ ) {
 406                 if (old_state == 7 || old_state == 8) {
 407                         DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
 408                         if (!timer_pending(&hfc->t4_timer)) {
 409                                 hfc->t4_timer.expires =
 410                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 411                                 add_timer(&hfc->t4_timer);
 412                         }
 413                 } else {
 414                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 415                                            PH_DEACTIVATE | INDICATION,
 416                                            NULL);
 417                         DBG(HFCUSB_DBG_STATES,
 418                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 419                         hfc->l1_activated = 0;
 420                         handle_led(hfc, LED_S0_OFF);
 421                 }
 422         }
 423         hfc->l1_state = state;
 424 }
 425
 426 static void
 427 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 428               void *buf, int num_packets, int packet_size, int interval,
 429               usb_complete_t complete, void *context)
 430 {
 431         int k;
 432
 433         urb->dev = dev;
 434         urb->pipe = pipe;
 435         urb->complete = complete;
 436         urb->number_of_packets = num_packets;
 437         urb->transfer_buffer_length = packet_size * num_packets;
 438         urb->context = context;
 439         urb->transfer_buffer = buf;
 440         urb->transfer_flags = URB_ISO_ASAP;
 441         urb->actual_length = 0;
 442         urb->interval = interval;
 443         for (k = 0; k < num_packets; k++) {
 444                 urb->iso_frame_desc[k].offset = packet_size * k;
 445                 urb->iso_frame_desc[k].length = packet_size;
 446                 urb->iso_frame_desc[k].actual_length = 0;
 447         }
 448 }
 449
 450 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 451  * gaps in the transfer chain
 452  */
 453 static int
 454 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
 455                  usb_complete_t complete, int packet_size)
 456 {
 457         int i, k, errcode;
 458
 459         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 460             fifo->fifonum);
 461
 462         /* allocate Memory for Iso out Urbs */
 463         for (i = 0; i < 2; i++) {
 464                 if (!(fifo->iso[i].purb)) {
 465                         fifo->iso[i].purb =
 466                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 467                         if (!(fifo->iso[i].purb)) {
 468                                 printk(KERN_INFO
 469                                        "alloc urb for fifo %i failed!!!",
 470                                        fifo->fifonum);
 471                         }
 472                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 473
 474                         /* Init the first iso */
 475                         if (ISO_BUFFER_SIZE >=
 476                             (fifo->usb_packet_maxlen *
 477                              num_packets_per_urb)) {
 478                                 fill_isoc_urb(fifo->iso[i].purb,
 479                                               fifo->hfc->dev, fifo->pipe,
 480                                               fifo->iso[i].buffer,
 481                                               num_packets_per_urb,
 482                                               fifo->usb_packet_maxlen,
 483                                               fifo->intervall, complete,
 484                                               &fifo->iso[i]);
 485                                 memset(fifo->iso[i].buffer, 0,
 486                                        sizeof(fifo->iso[i].buffer));
 487                                 /* defining packet delimeters in fifo->buffer */
 488                                 for (k = 0; k < num_packets_per_urb; k++) {
 489                                         fifo->iso[i].purb->
 490                                             iso_frame_desc[k].offset =
 491                                             k * packet_size;
 492                                         fifo->iso[i].purb->
 493                                             iso_frame_desc[k].length =
 494                                             packet_size;
 495                                 }
 496                         } else {
 497                                 printk(KERN_INFO
 498                                        "HFC-S USB: ISO Buffer size to small!\n");
 499                         }
 500                 }
 501                 fifo->bit_line = BITLINE_INF;
 502
 503                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 504                 fifo->active = (errcode >= 0) ? 1 : 0;
 505                 if (errcode < 0)
 506                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 507                                i, errcode, symbolic(urb_errlist, errcode));
 508         }
 509         return (fifo->active);
 510 }
 511
 512 /* stops running iso chain and frees their pending urbs */
 513 static void
 514 stop_isoc_chain(usb_fifo * fifo)
 515 {
 516         int i;
 517
 518         for (i = 0; i < 2; i++) {
 519                 if (fifo->iso[i].purb) {
 520                         DBG(HFCUSB_DBG_INIT,
 521                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 522                             fifo->fifonum, i);
 523                         usb_kill_urb(fifo->iso[i].purb);
 524                         usb_free_urb(fifo->iso[i].purb);
 525                         fifo->iso[i].purb = NULL;
 526                 }
 527         }
 528
 529         usb_kill_urb(fifo->urb);
 530         usb_free_urb(fifo->urb);
 531         fifo->urb = NULL;
 532         fifo->active = 0;
 533 }
 534
 535 /* defines how much ISO packets are handled in one URB */
 536 static int iso_packets[8] =
 537     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 538         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 539 };
 540
 541 static void
 542 tx_iso_complete(struct urb *urb)
 543 {
 544         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 545         usb_fifo *fifo = context_iso_urb->owner_fifo;
 546         hfcusb_data *hfc = fifo->hfc;
 547         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 548             errcode;
 549         int frame_complete, transp_mode, fifon, status;
 550         __u8 threshbit;
 551
 552         fifon = fifo->fifonum;
 553         status = urb->status;
 554
 555         tx_offset = 0;
 556
 557         /* ISO transfer only partially completed,
 558            look at individual frame status for details */
 559         if (status == -EXDEV) {
 560                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 561                     ", urb->status %d, fifonum %d\n",
 562                     status, fifon);
 563
 564                 for (k = 0; k < iso_packets[fifon]; ++k) {
 565                         errcode = urb->iso_frame_desc[k].status;
 566                         if (errcode)
 567                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 568                                        "packet %i, status: %i\n",
 569                                        k, errcode);
 570                 }
 571
 572                 // clear status, so go on with ISO transfers
 573                 status = 0;
 574         }
 575
 576         if (fifo->active && !status) {
 577                 transp_mode = 0;
 578                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 579                         transp_mode = 1;
 580
 581                 /* is FifoFull-threshold set for our channel? */
 582                 threshbit = (hfc->threshold_mask & (1 << fifon));
 583                 num_isoc_packets = iso_packets[fifon];
 584
 585                 /* predict dataflow to avoid fifo overflow */
 586                 if (fifon >= HFCUSB_D_TX) {
 587                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 588                 } else {
 589                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 590                 }
 591                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 592                               context_iso_urb->buffer, num_isoc_packets,
 593                               fifo->usb_packet_maxlen, fifo->intervall,
 594                               tx_iso_complete, urb->context);
 595                 memset(context_iso_urb->buffer, 0,
 596                        sizeof(context_iso_urb->buffer));
 597                 frame_complete = 0;
 598
 599                 /* Generate next ISO Packets */
 600                 for (k = 0; k < num_isoc_packets; ++k) {
 601                         if (fifo->skbuff) {
 602                                 len = fifo->skbuff->len;
 603                                 /* we lower data margin every msec */
 604                                 fifo->bit_line -= sink;
 605                                 current_len = (0 - fifo->bit_line) / 8;
 606                                 /* maximum 15 byte for every ISO packet makes our life easier */
 607                                 if (current_len > 14)
 608                                         current_len = 14;
 609                                 current_len =
 610                                     (len <=
 611                                      current_len) ? len : current_len;
 612                                 /* how much bit do we put on the line? */
 613                                 fifo->bit_line += current_len * 8;
 614
 615                                 context_iso_urb->buffer[tx_offset] = 0;
 616                                 if (current_len == len) {
 617                                         if (!transp_mode) {
 618                                                 /* here frame completion */
 619                                                 context_iso_urb->
 620                                                     buffer[tx_offset] = 1;
 621                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 622                                                 fifo->bit_line += 32;
 623                                         }
 624                                         frame_complete = 1;
 625                                 }
 626
 627                                 memcpy(context_iso_urb->buffer +
 628                                        tx_offset + 1, fifo->skbuff->data,
 629                                        current_len);
 630                                 skb_pull(fifo->skbuff, current_len);
 631
 632                                 /* define packet delimeters within the URB buffer */
 633                                 urb->iso_frame_desc[k].offset = tx_offset;
 634                                 urb->iso_frame_desc[k].length =
 635                                     current_len + 1;
 636
 637                                 tx_offset += (current_len + 1);
 638                         } else {
 639                                 urb->iso_frame_desc[k].offset =
 640                                     tx_offset++;
 641
 642                                 urb->iso_frame_desc[k].length = 1;
 643                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 644
 645                                 if (fifo->bit_line < BITLINE_INF) {
 646                                         fifo->bit_line = BITLINE_INF;
 647                                 }
 648                         }
 649
 650                         if (frame_complete) {
 651                                 fifo->delete_flg = 1;
 652                                 fifo->hif->l1l2(fifo->hif,
 653                                                 PH_DATA | CONFIRM,
 654                                                 (void *) (unsigned long) fifo->skbuff->
 655                                                 truesize);
 656                                 if (fifo->skbuff && fifo->delete_flg) {
 657                                         dev_kfree_skb_any(fifo->skbuff);
 658                                         fifo->skbuff = NULL;
 659                                         fifo->delete_flg = 0;
 660                                 }
 661                                 frame_complete = 0;
 662                         }
 663                 }
 664                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 665                 if (errcode < 0) {
 666                         printk(KERN_INFO
 667                                "HFC-S USB: error submitting ISO URB: %d\n",
 668                                errcode);
 669                 }
 670         } else {
 671                 if (status && !hfc->disc_flag) {
 672                         printk(KERN_INFO
 673                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 674                                status, symbolic(urb_errlist, status), fifon);
 675                 }
 676         }
 677 }
 678
 679 static void
 680 rx_iso_complete(struct urb *urb)
 681 {
 682         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 683         usb_fifo *fifo = context_iso_urb->owner_fifo;
 684         hfcusb_data *hfc = fifo->hfc;
 685         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 686             status;
 687         unsigned int iso_status;
 688         __u8 *buf;
 689         static __u8 eof[8];
 690
 691         fifon = fifo->fifonum;
 692         status = urb->status;
 693
 694         if (urb->status == -EOVERFLOW) {
 695                 DBG(HFCUSB_DBG_VERBOSE_USB,
 696                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 697                 status = 0;
 698         }
 699
 700         /* ISO transfer only partially completed,
 701            look at individual frame status for details */
 702         if (status == -EXDEV) {
 703                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 704                     "urb->status %d, fifonum %d\n",
 705                     status, fifon);
 706                 status = 0;
 707         }
 708
 709         if (fifo->active && !status) {
 710                 num_isoc_packets = iso_packets[fifon];
 711                 maxlen = fifo->usb_packet_maxlen;
 712                 for (k = 0; k < num_isoc_packets; ++k) {
 713                         len = urb->iso_frame_desc[k].actual_length;
 714                         offset = urb->iso_frame_desc[k].offset;
 715                         buf = context_iso_urb->buffer + offset;
 716                         iso_status = urb->iso_frame_desc[k].status;
 717
 718                         if (iso_status && !hfc->disc_flag)
 719                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 720                                     "HFC-S USB: rx_iso_complete "
 721                                     "ISO packet %i, status: %i\n",
 722                                     k, iso_status);
 723
 724                         if (fifon == HFCUSB_D_RX) {
 725                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 726                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 727                                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 728                                        fifo->last_urblen, len, maxlen,
 729                                        eof[5]);
 730
 731                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 732                         }
 733
 734                         if (fifo->last_urblen != maxlen) {
 735                                 /* the threshold mask is in the 2nd status byte */
 736                                 hfc->threshold_mask = buf[1];
 737                                 /* care for L1 state only for D-Channel
 738                                    to avoid overlapped iso completions */
 739                                 if (fifon == HFCUSB_D_RX) {
 740                                         /* the S0 state is in the upper half
 741                                            of the 1st status byte */
 742                                         s0_state_handler(hfc, buf[0] >> 4);
 743                                 }
 744                                 eof[fifon] = buf[0] & 1;
 745                                 if (len > 2)
 746                                         collect_rx_frame(fifo, buf + 2,
 747                                                          len - 2,
 748                                                          (len < maxlen) ?
 749                                                          eof[fifon] : 0);
 750                         } else {
 751                                 collect_rx_frame(fifo, buf, len,
 752                                                  (len <
 753                                                   maxlen) ? eof[fifon] :
 754                                                  0);
 755                         }
 756                         fifo->last_urblen = len;
 757                 }
 758
 759                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 760                               context_iso_urb->buffer, num_isoc_packets,
 761                               fifo->usb_packet_maxlen, fifo->intervall,
 762                               rx_iso_complete, urb->context);
 763                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 764                 if (errcode < 0) {
 765                         printk(KERN_ERR
 766                                "HFC-S USB: error submitting ISO URB: %d\n",
 767                                errcode);
 768                 }
 769         } else {
 770                 if (status && !hfc->disc_flag) {
 771                         printk(KERN_ERR
 772                                "HFC-S USB: rx_iso_complete : "
 773                                "urb->status %d, fifonum %d\n",
 774                                status, fifon);
 775                 }
 776         }
 777 }
 778
 779 /* collect rx data from INT- and ISO-URBs  */
 780 static void
 781 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 782 {
 783         hfcusb_data *hfc = fifo->hfc;
 784         int transp_mode, fifon;
 785
 786         fifon = fifo->fifonum;
 787         transp_mode = 0;
 788         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 789                 transp_mode = 1;
 790
 791         if (!fifo->skbuff) {
 792                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 793                 if (!fifo->skbuff) {
 794                         printk(KERN_ERR
 795                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 796                                fifon);
 797                         return;
 798                 }
 799         }
 800         if (len) {
 801                 if (fifo->skbuff->len + len < fifo->max_size) {
 802                         memcpy(skb_put(fifo->skbuff, len), data, len);
 803                 } else {
 804                         DBG(HFCUSB_DBG_FIFO_ERR,
 805                                "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 806                                fifo->max_size, fifon);
 807                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 808                         skb_trim(fifo->skbuff, 0);
 809                 }
 810         }
 811         if (transp_mode && fifo->skbuff->len >= 128) {
 812                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 813                                 fifo->skbuff);
 814                 fifo->skbuff = NULL;
 815                 return;
 816         }
 817         /* we have a complete hdlc packet */
 818         if (finish) {
 819                 if (fifo->skbuff->len > 3 &&
 820                                 !fifo->skbuff->data[fifo->skbuff->len - 1]) {
 821
 822                         if (fifon == HFCUSB_D_RX) {
 823                                 DBG(HFCUSB_DBG_DCHANNEL,
 824                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 825                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 826                         }
 827
 828                         /* remove CRC & status */
 829                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 830                         if (fifon == HFCUSB_PCM_RX) {
 831                                 fifo->hif->l1l2(fifo->hif,
 832                                                 PH_DATA_E | INDICATION,
 833                                                 fifo->skbuff);
 834                         } else
 835                                 fifo->hif->l1l2(fifo->hif,
 836                                                 PH_DATA | INDICATION,
 837                                                 fifo->skbuff);
 838                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 839                 } else {
 840                         DBG(HFCUSB_DBG_FIFO_ERR,
 841                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 842                             fifo->skbuff->len, fifon);
 843                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 844                         skb_trim(fifo->skbuff, 0);
 845                 }
 846         }
 847 }
 848
 849 static void
 850 rx_int_complete(struct urb *urb)
 851 {
 852         int len;
 853         int status;
 854         __u8 *buf, maxlen, fifon;
 855         usb_fifo *fifo = (usb_fifo *) urb->context;
 856         hfcusb_data *hfc = fifo->hfc;
 857         static __u8 eof[8];
 858
 859         urb->dev = hfc->dev;    /* security init */
 860
 861         fifon = fifo->fifonum;
 862         if ((!fifo->active) || (urb->status)) {
 863                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 864                     fifon, urb->status);
 865
 866                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 867                 if (fifo->skbuff) {
 868                         dev_kfree_skb_any(fifo->skbuff);
 869                         fifo->skbuff = NULL;
 870                 }
 871                 return;
 872         }
 873         len = urb->actual_length;
 874         buf = fifo->buffer;
 875         maxlen = fifo->usb_packet_maxlen;
 876
 877         if (fifon == HFCUSB_D_RX) {
 878                 DBG(HFCUSB_DBG_VERBOSE_USB,
 879                        "HFC-S USB: INT-D-RX lst_urblen:%2d "
 880                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 881                        fifo->last_urblen, len, maxlen,
 882                        eof[5]);
 883                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 884         }
 885
 886         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 887                 /* the threshold mask is in the 2nd status byte */
 888                 hfc->threshold_mask = buf[1];
 889                 /* the S0 state is in the upper half of the 1st status byte */
 890                 s0_state_handler(hfc, buf[0] >> 4);
 891                 eof[fifon] = buf[0] & 1;
 892                 /* if we have more than the 2 status bytes -> collect data */
 893                 if (len > 2)
 894                         collect_rx_frame(fifo, buf + 2,
 895                                          urb->actual_length - 2,
 896                                          (len < maxlen) ? eof[fifon] : 0);
 897         } else {
 898                 collect_rx_frame(fifo, buf, urb->actual_length,
 899                                  (len < maxlen) ? eof[fifon] : 0);
 900         }
 901         fifo->last_urblen = urb->actual_length;
 902         status = usb_submit_urb(urb, GFP_ATOMIC);
 903         if (status) {
 904                 printk(KERN_INFO
 905                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 906                        __func__, fifon);
 907         }
 908 }
 909
 910 /* start initial INT-URB for certain fifo */
 911 static void
 912 start_int_fifo(usb_fifo * fifo)
 913 {
 914         int errcode;
 915
 916         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 917             fifo->fifonum);
 918
 919         if (!fifo->urb) {
 920                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 921                 if (!fifo->urb)
 922                         return;
 923         }
 924         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 925                          fifo->buffer, fifo->usb_packet_maxlen,
 926                          rx_int_complete, fifo, fifo->intervall);
 927         fifo->active = 1;       /* must be marked active */
 928         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 929         if (errcode) {
 930                 printk(KERN_ERR
 931                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
 932                        errcode);
 933                 fifo->active = 0;
 934                 fifo->skbuff = NULL;
 935         }
 936 }
 937
 938 static void
 939 setup_bchannel(hfcusb_data * hfc, int channel, int mode)
 940 {
 941         __u8 val, idx_table[2] = { 0, 2 };
 942
 943         if (hfc->disc_flag) {
 944                 return;
 945         }
 946         DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
 947             channel, mode);
 948         hfc->b_mode[channel] = mode;
 949
 950         /* setup CON_HDLC */
 951         val = 0;
 952         if (mode != L1_MODE_NULL)
 953                 val = 8;        /* enable fifo? */
 954         if (mode == L1_MODE_TRANS)
 955                 val |= 2;       /* set transparent bit */
 956
 957         /* set FIFO to transmit register */
 958         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
 959         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 960         /* reset fifo */
 961         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 962         /* set FIFO to receive register */
 963         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
 964         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 965         /* reset fifo */
 966         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 967
 968         val = 0x40;
 969         if (hfc->b_mode[0])
 970                 val |= 1;
 971         if (hfc->b_mode[1])
 972                 val |= 2;
 973         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
 974
 975         val = 0;
 976         if (hfc->b_mode[0])
 977                 val |= 1;
 978         if (hfc->b_mode[1])
 979                 val |= 2;
 980         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
 981
 982         if (mode == L1_MODE_NULL) {
 983                 if (channel)
 984                         handle_led(hfc, LED_B2_OFF);
 985                 else
 986                         handle_led(hfc, LED_B1_OFF);
 987         } else {
 988                 if (channel)
 989                         handle_led(hfc, LED_B2_ON);
 990                 else
 991                         handle_led(hfc, LED_B1_ON);
 992         }
 993 }
 994
 995 static void
 996 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
 997 {
 998         usb_fifo *fifo = my_hisax_if->priv;
 999         hfcusb_data *hfc = fifo->hfc;
1000
1001         switch (pr) {
1002                 case PH_ACTIVATE | REQUEST:
1003                         if (fifo->fifonum == HFCUSB_D_TX) {
1004                                 DBG(HFCUSB_DBG_STATES,
1005                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1006
1007                                 if (hfc->l1_state != 3
1008                                     && hfc->l1_state != 7) {
1009                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1010                                                            PH_DEACTIVATE |
1011                                                            INDICATION,
1012                                                            NULL);
1013                                         DBG(HFCUSB_DBG_STATES,
1014                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1015                                 } else {
1016                                         if (hfc->l1_state == 7) {       /* l1 already active */
1017                                                 hfc->d_if.ifc.l1l2(&hfc->
1018                                                                    d_if.
1019                                                                    ifc,
1020                                                                    PH_ACTIVATE
1021                                                                    |
1022                                                                    INDICATION,
1023                                                                    NULL);
1024                                                 DBG(HFCUSB_DBG_STATES,
1025                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1026                                         } else {
1027                                                 /* force sending sending INFO1 */
1028                                                 queue_control_request(hfc,
1029                                                                       HFCUSB_STATES,
1030                                                                       0x14,
1031                                                                       1);
1032                                                 mdelay(1);
1033                                                 /* start l1 activation */
1034                                                 queue_control_request(hfc,
1035                                                                       HFCUSB_STATES,
1036                                                                       0x04,
1037                                                                       1);
1038                                                 if (!timer_pending
1039                                                     (&hfc->t3_timer)) {
1040                                                         hfc->t3_timer.
1041                                                             expires =
1042                                                             jiffies +
1043                                                             (HFC_TIMER_T3 *
1044                                                              HZ) / 1000;
1045                                                         add_timer(&hfc->
1046                                                                   t3_timer);
1047                                                 }
1048                                         }
1049                                 }
1050                         } else {
1051                                 DBG(HFCUSB_DBG_STATES,
1052                                     "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1053                                 setup_bchannel(hfc,
1054                                             (fifo->fifonum ==
1055                                              HFCUSB_B1_TX) ? 0 : 1,
1056                                             (long) arg);
1057                                 fifo->hif->l1l2(fifo->hif,
1058                                                 PH_ACTIVATE | INDICATION,
1059                                                 NULL);
1060                         }
1061                         break;
1062                 case PH_DEACTIVATE | REQUEST:
1063                         if (fifo->fifonum == HFCUSB_D_TX) {
1064                                 DBG(HFCUSB_DBG_STATES,
1065                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1066                         } else {
1067                                 DBG(HFCUSB_DBG_STATES,
1068                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1069                                 setup_bchannel(hfc,
1070                                             (fifo->fifonum ==
1071                                              HFCUSB_B1_TX) ? 0 : 1,
1072                                             (int) L1_MODE_NULL);
1073                                 fifo->hif->l1l2(fifo->hif,
1074                                                 PH_DEACTIVATE | INDICATION,
1075                                                 NULL);
1076                         }
1077                         break;
1078                 case PH_DATA | REQUEST:
1079                         if (fifo->skbuff && fifo->delete_flg) {
1080                                 dev_kfree_skb_any(fifo->skbuff);
1081                                 fifo->skbuff = NULL;
1082                                 fifo->delete_flg = 0;
1083                         }
1084                         fifo->skbuff = arg;     /* we have a new buffer */
1085                         break;
1086                 default:
1087                         DBG(HFCUSB_DBG_STATES,
1088                                "HFC_USB: hfc_usb_d_l2l1: unknown state : %#x", pr);
1089                         break;
1090         }
1091 }
1092
1093 /* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1094 static int
1095 hfc_usb_init(hfcusb_data * hfc)
1096 {
1097         usb_fifo *fifo;
1098         int i;
1099         u_char b;
1100         struct hisax_b_if *p_b_if[2];
1101
1102         /* check the chip id */
1103         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1104                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1105                 return (1);
1106         }
1107         if (b != HFCUSB_CHIPID) {
1108                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1109                 return (1);
1110         }
1111
1112         /* first set the needed config, interface and alternate */
1113         usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1114
1115         /* do Chip reset */
1116         write_usb(hfc, HFCUSB_CIRM, 8);
1117         /* aux = output, reset off */
1118         write_usb(hfc, HFCUSB_CIRM, 0x10);
1119
1120         /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1121         write_usb(hfc, HFCUSB_USB_SIZE,
1122                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1123
1124         /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1125         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1126
1127         /* enable PCM/GCI master mode */
1128         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1129         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1130
1131         /* init the fifos */
1132         write_usb(hfc, HFCUSB_F_THRES,
1133                   (HFCUSB_TX_THRESHOLD /
1134                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1135
1136         fifo = hfc->fifos;
1137         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1138                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1139                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1140                 fifo[i].max_size =
1141                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1142                 fifo[i].last_urblen = 0;
1143                 /* set 2 bit for D- & E-channel */
1144                 write_usb(hfc, HFCUSB_HDLC_PAR,
1145                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1146                 /* rx hdlc, enable IFF for D-channel */
1147                 write_usb(hfc, HFCUSB_CON_HDLC,
1148                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1149                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1150         }
1151
1152         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1153         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1154         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1155
1156         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1157         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1158
1159         /* set both B-channel to not connected */
1160         hfc->b_mode[0] = L1_MODE_NULL;
1161         hfc->b_mode[1] = L1_MODE_NULL;
1162
1163         hfc->l1_activated = 0;
1164         hfc->disc_flag = 0;
1165         hfc->led_state = 0;
1166         hfc->old_led_state = 0;
1167
1168         /* init the t3 timer */
1169         init_timer(&hfc->t3_timer);
1170         hfc->t3_timer.data = (long) hfc;
1171         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1172
1173         /* init the t4 timer */
1174         init_timer(&hfc->t4_timer);
1175         hfc->t4_timer.data = (long) hfc;
1176         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1177
1178         /* init the background machinery for control requests */
1179         hfc->ctrl_read.bRequestType = 0xc0;
1180         hfc->ctrl_read.bRequest = 1;
1181         hfc->ctrl_read.wLength = cpu_to_le16(1);
1182         hfc->ctrl_write.bRequestType = 0x40;
1183         hfc->ctrl_write.bRequest = 0;
1184         hfc->ctrl_write.wLength = 0;
1185         usb_fill_control_urb(hfc->ctrl_urb,
1186                              hfc->dev,
1187                              hfc->ctrl_out_pipe,
1188                              (u_char *) & hfc->ctrl_write,
1189                              NULL, 0, ctrl_complete, hfc);
1190         /* Init All Fifos */
1191         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1192                 hfc->fifos[i].iso[0].purb = NULL;
1193                 hfc->fifos[i].iso[1].purb = NULL;
1194                 hfc->fifos[i].active = 0;
1195         }
1196         /* register Modul to upper Hisax Layers */
1197         hfc->d_if.owner = THIS_MODULE;
1198         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1199         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1200         for (i = 0; i < 2; i++) {
1201                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1202                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1203                 p_b_if[i] = &hfc->b_if[i];
1204         }
1205         /* default Prot: EURO ISDN, should be a module_param */
1206         hfc->protocol = 2;
1207         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1208         if (i) {
1209                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1210                 return i;
1211         }
1212
1213 #ifdef CONFIG_HISAX_DEBUG
1214         hfc_debug = debug;
1215 #endif
1216
1217         for (i = 0; i < 4; i++)
1218                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1219         for (i = 4; i < 8; i++)
1220                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1221
1222         /* 3 (+1) INT IN + 3 ISO OUT */
1223         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1224                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1225                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1226                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1227                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1228                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1229         }
1230         /* 3 (+1) ISO IN + 3 ISO OUT */
1231         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1232                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1233                                  rx_iso_complete, 16);
1234                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1235                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1236                                          ISOC_PACKETS_D, rx_iso_complete,
1237                                          16);
1238                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1239                                  rx_iso_complete, 16);
1240                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1241                                  rx_iso_complete, 16);
1242         }
1243
1244         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1245                          tx_iso_complete, 1);
1246         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1247                          tx_iso_complete, 1);
1248         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1249                          tx_iso_complete, 1);
1250
1251         handle_led(hfc, LED_POWER_ON);
1252
1253         return (0);
1254 }
1255
1256 /* initial callback for each plugged USB device */
1257 static int
1258 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1259 {
1260         struct usb_device *dev = interface_to_usbdev(intf);
1261         hfcusb_data *context;
1262         struct usb_host_interface *iface = intf->cur_altsetting;
1263         struct usb_host_interface *iface_used = NULL;
1264         struct usb_host_endpoint *ep;
1265         int ifnum = iface->desc.bInterfaceNumber;
1266         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1267             attr, cfg_found, cidx, ep_addr;
1268         int cmptbl[16], small_match, iso_packet_size, packet_size,
1269             alt_used = 0;
1270         hfcsusb_vdata *driver_info;
1271
1272         vend_idx = 0xffff;
1273         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1274                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1275                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1276                         vend_idx = i;
1277                         continue;
1278                 }
1279         }
1280
1281         printk(KERN_INFO
1282                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1283                ifnum, iface->desc.bAlternateSetting, intf->minor);
1284
1285         if (vend_idx != 0xffff) {
1286                 /* if vendor and product ID is OK, start probing alternate settings */
1287                 alt_idx = 0;
1288                 small_match = 0xffff;
1289
1290                 /* default settings */
1291                 iso_packet_size = 16;
1292                 packet_size = 64;
1293
1294                 while (alt_idx < intf->num_altsetting) {
1295                         iface = intf->altsetting + alt_idx;
1296                         probe_alt_setting = iface->desc.bAlternateSetting;
1297                         cfg_used = 0;
1298
1299                         /* check for config EOL element */
1300                         while (validconf[cfg_used][0]) {
1301                                 cfg_found = 1;
1302                                 vcf = validconf[cfg_used];
1303                                 /* first endpoint descriptor */
1304                                 ep = iface->endpoint;
1305
1306                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1307
1308                                 /* check for all endpoints in this alternate setting */
1309                                 for (i = 0; i < iface->desc.bNumEndpoints;
1310                                      i++) {
1311                                         ep_addr =
1312                                             ep->desc.bEndpointAddress;
1313                                         /* get endpoint base */
1314                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1315                                         if (ep_addr & 0x80)
1316                                                 idx++;
1317                                         attr = ep->desc.bmAttributes;
1318                                         if (cmptbl[idx] == EP_NUL) {
1319                                                 cfg_found = 0;
1320                                         }
1321                                         if (attr == USB_ENDPOINT_XFER_INT
1322                                             && cmptbl[idx] == EP_INT)
1323                                                 cmptbl[idx] = EP_NUL;
1324                                         if (attr == USB_ENDPOINT_XFER_BULK
1325                                             && cmptbl[idx] == EP_BLK)
1326                                                 cmptbl[idx] = EP_NUL;
1327                                         if (attr == USB_ENDPOINT_XFER_ISOC
1328                                             && cmptbl[idx] == EP_ISO)
1329                                                 cmptbl[idx] = EP_NUL;
1330
1331                                         /* check if all INT endpoints match minimum interval */
1332                                         if ((attr == USB_ENDPOINT_XFER_INT)
1333                                             && (ep->desc.bInterval < vcf[17])) {
1334                                                 cfg_found = 0;
1335                                         }
1336                                         ep++;
1337                                 }
1338                                 for (i = 0; i < 16; i++) {
1339                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1340                                         if (cmptbl[i] != EP_NOP
1341                                             && cmptbl[i] != EP_NUL)
1342                                                 cfg_found = 0;
1343                                 }
1344                                 if (cfg_found) {
1345                                         if (cfg_used < small_match) {
1346                                                 small_match = cfg_used;
1347                                                 alt_used =
1348                                                     probe_alt_setting;
1349                                                 iface_used = iface;
1350                                         }
1351                                 }
1352                                 cfg_used++;
1353                         }
1354                         alt_idx++;
1355                 } /* (alt_idx < intf->num_altsetting) */
1356
1357                 /* found a valid USB Ta Endpint config */
1358                 if (small_match != 0xffff) {
1359                         iface = iface_used;
1360                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1361                                 return (-ENOMEM);       /* got no mem */
1362
1363                         ep = iface->endpoint;
1364                         vcf = validconf[small_match];
1365
1366                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1367                                 ep_addr = ep->desc.bEndpointAddress;
1368                                 /* get endpoint base */
1369                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1370                                 if (ep_addr & 0x80)
1371                                         idx++;
1372                                 cidx = idx & 7;
1373                                 attr = ep->desc.bmAttributes;
1374
1375                                 /* init Endpoints */
1376                                 if (vcf[idx] != EP_NOP
1377                                     && vcf[idx] != EP_NUL) {
1378                                         switch (attr) {
1379                                                 case USB_ENDPOINT_XFER_INT:
1380                                                         context->
1381                                                             fifos[cidx].
1382                                                             pipe =
1383                                                             usb_rcvintpipe
1384                                                             (dev,
1385                                                              ep->desc.
1386                                                              bEndpointAddress);
1387                                                         context->
1388                                                             fifos[cidx].
1389                                                             usb_transfer_mode
1390                                                             = USB_INT;
1391                                                         packet_size =
1392                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1393                                                         break;
1394                                                 case USB_ENDPOINT_XFER_BULK:
1395                                                         if (ep_addr & 0x80)
1396                                                                 context->
1397                                                                     fifos
1398                                                                     [cidx].
1399                                                                     pipe =
1400                                                                     usb_rcvbulkpipe
1401                                                                     (dev,
1402                                                                      ep->
1403                                                                      desc.
1404                                                                      bEndpointAddress);
1405                                                         else
1406                                                                 context->
1407                                                                     fifos
1408                                                                     [cidx].
1409                                                                     pipe =
1410                                                                     usb_sndbulkpipe
1411                                                                     (dev,
1412                                                                      ep->
1413                                                                      desc.
1414                                                                      bEndpointAddress);
1415                                                         context->
1416                                                             fifos[cidx].
1417                                                             usb_transfer_mode
1418                                                             = USB_BULK;
1419                                                         packet_size =
1420                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1421                                                         break;
1422                                                 case USB_ENDPOINT_XFER_ISOC:
1423                                                         if (ep_addr & 0x80)
1424                                                                 context->
1425                                                                     fifos
1426                                                                     [cidx].
1427                                                                     pipe =
1428                                                                     usb_rcvisocpipe
1429                                                                     (dev,
1430                                                                      ep->
1431                                                                      desc.
1432                                                                      bEndpointAddress);
1433                                                         else
1434                                                                 context->
1435                                                                     fifos
1436                                                                     [cidx].
1437                                                                     pipe =
1438                                                                     usb_sndisocpipe
1439                                                                     (dev,
1440                                                                      ep->
1441                                                                      desc.
1442                                                                      bEndpointAddress);
1443                                                         context->
1444                                                             fifos[cidx].
1445                                                             usb_transfer_mode
1446                                                             = USB_ISOC;
1447                                                         iso_packet_size =
1448                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1449                                                         break;
1450                                                 default:
1451                                                         context->
1452                                                             fifos[cidx].
1453                                                             pipe = 0;
1454                                         }       /* switch attribute */
1455
1456                                         if (context->fifos[cidx].pipe) {
1457                                                 context->fifos[cidx].
1458                                                     fifonum = cidx;
1459                                                 context->fifos[cidx].hfc =
1460                                                     context;
1461                                                 context->fifos[cidx].usb_packet_maxlen =
1462                                                     le16_to_cpu(ep->desc.wMaxPacketSize);
1463                                                 context->fifos[cidx].
1464                                                     intervall =
1465                                                     ep->desc.bInterval;
1466                                                 context->fifos[cidx].
1467                                                     skbuff = NULL;
1468                                         }
1469                                 }
1470                                 ep++;
1471                         }
1472                         context->dev = dev;     /* save device */
1473                         context->if_used = ifnum;       /* save used interface */
1474                         context->alt_used = alt_used;   /* and alternate config */
1475                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1476                         context->cfg_used = vcf[16];    /* store used config */
1477                         context->vend_idx = vend_idx;   /* store found vendor */
1478                         context->packet_size = packet_size;
1479                         context->iso_packet_size = iso_packet_size;
1480
1481                         /* create the control pipes needed for register access */
1482                         context->ctrl_in_pipe =
1483                             usb_rcvctrlpipe(context->dev, 0);
1484                         context->ctrl_out_pipe =
1485                             usb_sndctrlpipe(context->dev, 0);
1486                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1487
1488                         driver_info =
1489                             (hfcsusb_vdata *) hfcusb_idtab[vend_idx].
1490                             driver_info;
1491                         printk(KERN_INFO "HFC-S USB: detected \"%s\"\n",
1492                                driver_info->vend_name);
1493
1494                         DBG(HFCUSB_DBG_INIT,
1495                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1496                             conf_str[small_match], context->if_used,
1497                             context->alt_used,
1498                             validconf[small_match][18]);
1499
1500                         /* init the chip and register the driver */
1501                         if (hfc_usb_init(context)) {
1502                                 usb_kill_urb(context->ctrl_urb);
1503                                 usb_free_urb(context->ctrl_urb);
1504                                 context->ctrl_urb = NULL;
1505                                 kfree(context);
1506                                 return (-EIO);
1507                         }
1508                         usb_set_intfdata(intf, context);
1509                         return (0);
1510                 }
1511         } else {
1512                 printk(KERN_INFO
1513                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1514         }
1515         return (-EIO);
1516 }
1517
1518 /* callback for unplugged USB device */
1519 static void
1520 hfc_usb_disconnect(struct usb_interface *intf)
1521 {
1522         hfcusb_data *context = usb_get_intfdata(intf);
1523         int i;
1524
1525         handle_led(context, LED_POWER_OFF);
1526         schedule_timeout(HZ / 100);
1527
1528         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1529         context->disc_flag = 1;
1530         usb_set_intfdata(intf, NULL);
1531
1532         if (timer_pending(&context->t3_timer))
1533                 del_timer(&context->t3_timer);
1534         if (timer_pending(&context->t4_timer))
1535                 del_timer(&context->t4_timer);
1536
1537         /* tell all fifos to terminate */
1538         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1539                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1540                         if (context->fifos[i].active > 0) {
1541                                 stop_isoc_chain(&context->fifos[i]);
1542                                 DBG(HFCUSB_DBG_INIT,
1543                                     "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1544                                     __func__, i);
1545                         }
1546                 } else {
1547                         if (context->fifos[i].active > 0) {
1548                                 context->fifos[i].active = 0;
1549                                 DBG(HFCUSB_DBG_INIT,
1550                                     "HFC-S USB: %s unlinking URB for Fifo(%i)",
1551                                     __func__, i);
1552                         }
1553                         usb_kill_urb(context->fifos[i].urb);
1554                         usb_free_urb(context->fifos[i].urb);
1555                         context->fifos[i].urb = NULL;
1556                 }
1557                 context->fifos[i].active = 0;
1558         }
1559         usb_kill_urb(context->ctrl_urb);
1560         usb_free_urb(context->ctrl_urb);
1561         context->ctrl_urb = NULL;
1562         hisax_unregister(&context->d_if);
1563         kfree(context);         /* free our structure again */
1564 }
1565
1566 static struct usb_driver hfc_drv = {
1567         .name  = "hfc_usb",
1568         .id_table = hfcusb_idtab,
1569         .probe = hfc_usb_probe,
1570         .disconnect = hfc_usb_disconnect,
1571 };
1572
1573 static void __exit
1574 hfc_usb_mod_exit(void)
1575 {
1576         usb_deregister(&hfc_drv); /* release our driver */
1577         printk(KERN_INFO "HFC-S USB: module removed\n");
1578 }
1579
1580 static int __init
1581 hfc_usb_mod_init(void)
1582 {
1583         char revstr[30], datestr[30], dummy[30];
1584 #ifndef CONFIG_HISAX_DEBUG
1585         hfc_debug = debug;
1586 #endif
1587         sscanf(hfcusb_revision,
1588                "%s %s $ %s %s %s $ ", dummy, revstr,
1589                dummy, datestr, dummy);
1590         printk(KERN_INFO
1591                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1592                revstr, datestr, debug);
1593         if (usb_register(&hfc_drv)) {
1594                 printk(KERN_INFO
1595                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1596                 return (-1);    /* unable to register */
1597         }
1598         return (0);
1599 }
1600
1601 module_init(hfc_usb_mod_init);
1602 module_exit(hfc_usb_mod_exit);
1603 MODULE_AUTHOR(DRIVER_AUTHOR);
1604 MODULE_DESCRIPTION(DRIVER_DESC);
1605 MODULE_LICENSE("GPL");
1606 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);