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 const 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(struct timer_list *t)
 347 {
 348         hfcusb_data *hfc = from_timer(hfc, t, t3_timer);
 349         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 350                            NULL);
 351
 352         DBG(HFCUSB_DBG_STATES,
 353             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 354
 355         hfc->l1_activated = 0;
 356         handle_led(hfc, LED_S0_OFF);
 357         /* deactivate : */
 358         queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 359         queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 360 }
 361
 362 /* ISDN l1 timer T4 expires */
 363 static void
 364 l1_timer_expire_t4(struct timer_list *t)
 365 {
 366         hfcusb_data *hfc = from_timer(hfc, t, t4_timer);
 367         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 368                            NULL);
 369
 370         DBG(HFCUSB_DBG_STATES,
 371             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 372
 373         hfc->l1_activated = 0;
 374         handle_led(hfc, LED_S0_OFF);
 375 }
 376
 377 /* S0 state changed */
 378 static void
 379 s0_state_handler(hfcusb_data *hfc, __u8 state)
 380 {
 381         __u8 old_state;
 382
 383         old_state = hfc->l1_state;
 384         if (state == old_state || state < 1 || state > 8)
 385                 return;
 386
 387         DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
 388             old_state, state);
 389
 390         if (state < 4 || state == 7 || state == 8) {
 391                 if (timer_pending(&hfc->t3_timer))
 392                         del_timer(&hfc->t3_timer);
 393                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
 394         }
 395         if (state >= 7) {
 396                 if (timer_pending(&hfc->t4_timer))
 397                         del_timer(&hfc->t4_timer);
 398                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
 399         }
 400
 401         if (state == 7 && !hfc->l1_activated) {
 402                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 403                                    PH_ACTIVATE | INDICATION, NULL);
 404                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 405                 hfc->l1_activated = 1;
 406                 handle_led(hfc, LED_S0_ON);
 407         } else if (state <= 3 /* && activated */) {
 408                 if (old_state == 7 || old_state == 8) {
 409                         DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
 410                         if (!timer_pending(&hfc->t4_timer)) {
 411                                 hfc->t4_timer.expires =
 412                                         jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 413                                 add_timer(&hfc->t4_timer);
 414                         }
 415                 } else {
 416                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 417                                            PH_DEACTIVATE | INDICATION,
 418                                            NULL);
 419                         DBG(HFCUSB_DBG_STATES,
 420                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 421                         hfc->l1_activated = 0;
 422                         handle_led(hfc, LED_S0_OFF);
 423                 }
 424         }
 425         hfc->l1_state = state;
 426 }
 427
 428 static void
 429 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 430               void *buf, int num_packets, int packet_size, int interval,
 431               usb_complete_t complete, void *context)
 432 {
 433         int k;
 434
 435         usb_fill_int_urb(urb, dev, pipe, buf, packet_size * num_packets,
 436                          complete, context, interval);
 437
 438         urb->number_of_packets = num_packets;
 439         urb->transfer_flags = URB_ISO_ASAP;
 440         urb->actual_length = 0;
 441         for (k = 0; k < num_packets; k++) {
 442                 urb->iso_frame_desc[k].offset = packet_size * k;
 443                 urb->iso_frame_desc[k].length = packet_size;
 444                 urb->iso_frame_desc[k].actual_length = 0;
 445         }
 446 }
 447
 448 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 449  * gaps in the transfer chain
 450  */
 451 static int
 452 start_isoc_chain(usb_fifo *fifo, int num_packets_per_urb,
 453                  usb_complete_t complete, int packet_size)
 454 {
 455         int i, k, errcode;
 456
 457         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 458             fifo->fifonum);
 459
 460         /* allocate Memory for Iso out Urbs */
 461         for (i = 0; i < 2; i++) {
 462                 if (!(fifo->iso[i].purb)) {
 463                         fifo->iso[i].purb =
 464                                 usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 465                         if (!(fifo->iso[i].purb)) {
 466                                 printk(KERN_INFO
 467                                        "alloc urb for fifo %i failed!!!",
 468                                        fifo->fifonum);
 469                         }
 470                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 471
 472                         /* Init the first iso */
 473                         if (ISO_BUFFER_SIZE >=
 474                             (fifo->usb_packet_maxlen *
 475                              num_packets_per_urb)) {
 476                                 fill_isoc_urb(fifo->iso[i].purb,
 477                                               fifo->hfc->dev, fifo->pipe,
 478                                               fifo->iso[i].buffer,
 479                                               num_packets_per_urb,
 480                                               fifo->usb_packet_maxlen,
 481                                               fifo->intervall, complete,
 482                                               &fifo->iso[i]);
 483                                 memset(fifo->iso[i].buffer, 0,
 484                                        sizeof(fifo->iso[i].buffer));
 485                                 /* defining packet delimeters in fifo->buffer */
 486                                 for (k = 0; k < num_packets_per_urb; k++) {
 487                                         fifo->iso[i].purb->
 488                                                 iso_frame_desc[k].offset =
 489                                                 k * packet_size;
 490                                         fifo->iso[i].purb->
 491                                                 iso_frame_desc[k].length =
 492                                                 packet_size;
 493                                 }
 494                         } else {
 495                                 printk(KERN_INFO
 496                                        "HFC-S USB: ISO Buffer size to small!\n");
 497                         }
 498                 }
 499                 fifo->bit_line = BITLINE_INF;
 500
 501                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 502                 fifo->active = (errcode >= 0) ? 1 : 0;
 503                 if (errcode < 0)
 504                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 505                                i, errcode, symbolic(urb_errlist, errcode));
 506         }
 507         return (fifo->active);
 508 }
 509
 510 /* stops running iso chain and frees their pending urbs */
 511 static void
 512 stop_isoc_chain(usb_fifo *fifo)
 513 {
 514         int i;
 515
 516         for (i = 0; i < 2; i++) {
 517                 if (fifo->iso[i].purb) {
 518                         DBG(HFCUSB_DBG_INIT,
 519                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 520                             fifo->fifonum, i);
 521                         usb_kill_urb(fifo->iso[i].purb);
 522                         usb_free_urb(fifo->iso[i].purb);
 523                         fifo->iso[i].purb = NULL;
 524                 }
 525         }
 526
 527         usb_kill_urb(fifo->urb);
 528         usb_free_urb(fifo->urb);
 529         fifo->urb = NULL;
 530         fifo->active = 0;
 531 }
 532
 533 /* defines how much ISO packets are handled in one URB */
 534 static int iso_packets[8] =
 535 { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 536   ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 537 };
 538
 539 static void
 540 tx_iso_complete(struct urb *urb)
 541 {
 542         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 543         usb_fifo *fifo = context_iso_urb->owner_fifo;
 544         hfcusb_data *hfc = fifo->hfc;
 545         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 546                 errcode;
 547         int frame_complete, transp_mode, fifon, status;
 548         __u8 threshbit;
 549
 550         fifon = fifo->fifonum;
 551         status = urb->status;
 552
 553         tx_offset = 0;
 554
 555         /* ISO transfer only partially completed,
 556            look at individual frame status for details */
 557         if (status == -EXDEV) {
 558                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 559                     ", urb->status %d, fifonum %d\n",
 560                     status, fifon);
 561
 562                 for (k = 0; k < iso_packets[fifon]; ++k) {
 563                         errcode = urb->iso_frame_desc[k].status;
 564                         if (errcode)
 565                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 566                                     "packet %i, status: %i\n",
 567                                     k, errcode);
 568                 }
 569
 570                 // clear status, so go on with ISO transfers
 571                 status = 0;
 572         }
 573
 574         if (fifo->active && !status) {
 575                 transp_mode = 0;
 576                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 577                         transp_mode = 1;
 578
 579                 /* is FifoFull-threshold set for our channel? */
 580                 threshbit = (hfc->threshold_mask & (1 << fifon));
 581                 num_isoc_packets = iso_packets[fifon];
 582
 583                 /* predict dataflow to avoid fifo overflow */
 584                 if (fifon >= HFCUSB_D_TX) {
 585                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 586                 } else {
 587                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 588                 }
 589                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 590                               context_iso_urb->buffer, num_isoc_packets,
 591                               fifo->usb_packet_maxlen, fifo->intervall,
 592                               tx_iso_complete, urb->context);
 593                 memset(context_iso_urb->buffer, 0,
 594                        sizeof(context_iso_urb->buffer));
 595                 frame_complete = 0;
 596
 597                 /* Generate next ISO Packets */
 598                 for (k = 0; k < num_isoc_packets; ++k) {
 599                         if (fifo->skbuff) {
 600                                 len = fifo->skbuff->len;
 601                                 /* we lower data margin every msec */
 602                                 fifo->bit_line -= sink;
 603                                 current_len = (0 - fifo->bit_line) / 8;
 604                                 /* maximum 15 byte for every ISO packet makes our life easier */
 605                                 if (current_len > 14)
 606                                         current_len = 14;
 607                                 current_len =
 608                                         (len <=
 609                                          current_len) ? len : current_len;
 610                                 /* how much bit do we put on the line? */
 611                                 fifo->bit_line += current_len * 8;
 612
 613                                 context_iso_urb->buffer[tx_offset] = 0;
 614                                 if (current_len == len) {
 615                                         if (!transp_mode) {
 616                                                 /* here frame completion */
 617                                                 context_iso_urb->
 618                                                         buffer[tx_offset] = 1;
 619                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 620                                                 fifo->bit_line += 32;
 621                                         }
 622                                         frame_complete = 1;
 623                                 }
 624
 625                                 memcpy(context_iso_urb->buffer +
 626                                        tx_offset + 1, fifo->skbuff->data,
 627                                        current_len);
 628                                 skb_pull(fifo->skbuff, current_len);
 629
 630                                 /* define packet delimeters within the URB buffer */
 631                                 urb->iso_frame_desc[k].offset = tx_offset;
 632                                 urb->iso_frame_desc[k].length =
 633                                         current_len + 1;
 634
 635                                 tx_offset += (current_len + 1);
 636                         } else {
 637                                 urb->iso_frame_desc[k].offset =
 638                                         tx_offset++;
 639
 640                                 urb->iso_frame_desc[k].length = 1;
 641                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 642
 643                                 if (fifo->bit_line < BITLINE_INF) {
 644                                         fifo->bit_line = BITLINE_INF;
 645                                 }
 646                         }
 647
 648                         if (frame_complete) {
 649                                 fifo->delete_flg = 1;
 650                                 fifo->hif->l1l2(fifo->hif,
 651                                                 PH_DATA | CONFIRM,
 652                                                 (void *) (unsigned long) fifo->skbuff->
 653                                                 truesize);
 654                                 if (fifo->skbuff && fifo->delete_flg) {
 655                                         dev_kfree_skb_any(fifo->skbuff);
 656                                         fifo->skbuff = NULL;
 657                                         fifo->delete_flg = 0;
 658                                 }
 659                                 frame_complete = 0;
 660                         }
 661                 }
 662                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 663                 if (errcode < 0) {
 664                         printk(KERN_INFO
 665                                "HFC-S USB: error submitting ISO URB: %d\n",
 666                                errcode);
 667                 }
 668         } else {
 669                 if (status && !hfc->disc_flag) {
 670                         printk(KERN_INFO
 671                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 672                                status, symbolic(urb_errlist, status), fifon);
 673                 }
 674         }
 675 }
 676
 677 static void
 678 rx_iso_complete(struct urb *urb)
 679 {
 680         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 681         usb_fifo *fifo = context_iso_urb->owner_fifo;
 682         hfcusb_data *hfc = fifo->hfc;
 683         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 684                 status;
 685         unsigned int iso_status;
 686         __u8 *buf;
 687         static __u8 eof[8];
 688
 689         fifon = fifo->fifonum;
 690         status = urb->status;
 691
 692         if (urb->status == -EOVERFLOW) {
 693                 DBG(HFCUSB_DBG_VERBOSE_USB,
 694                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 695                 status = 0;
 696         }
 697
 698         /* ISO transfer only partially completed,
 699            look at individual frame status for details */
 700         if (status == -EXDEV) {
 701                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 702                     "urb->status %d, fifonum %d\n",
 703                     status, fifon);
 704                 status = 0;
 705         }
 706
 707         if (fifo->active && !status) {
 708                 num_isoc_packets = iso_packets[fifon];
 709                 maxlen = fifo->usb_packet_maxlen;
 710                 for (k = 0; k < num_isoc_packets; ++k) {
 711                         len = urb->iso_frame_desc[k].actual_length;
 712                         offset = urb->iso_frame_desc[k].offset;
 713                         buf = context_iso_urb->buffer + offset;
 714                         iso_status = urb->iso_frame_desc[k].status;
 715
 716                         if (iso_status && !hfc->disc_flag)
 717                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 718                                     "HFC-S USB: rx_iso_complete "
 719                                     "ISO packet %i, status: %i\n",
 720                                     k, iso_status);
 721
 722                         if (fifon == HFCUSB_D_RX) {
 723                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 724                                     "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 725                                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 726                                     fifo->last_urblen, len, maxlen,
 727                                     eof[5]);
 728
 729                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 730                         }
 731
 732                         if (fifo->last_urblen != maxlen) {
 733                                 /* the threshold mask is in the 2nd status byte */
 734                                 hfc->threshold_mask = buf[1];
 735                                 /* care for L1 state only for D-Channel
 736                                    to avoid overlapped iso completions */
 737                                 if (fifon == HFCUSB_D_RX) {
 738                                         /* the S0 state is in the upper half
 739                                            of the 1st status byte */
 740                                         s0_state_handler(hfc, buf[0] >> 4);
 741                                 }
 742                                 eof[fifon] = buf[0] & 1;
 743                                 if (len > 2)
 744                                         collect_rx_frame(fifo, buf + 2,
 745                                                          len - 2,
 746                                                          (len < maxlen) ?
 747                                                          eof[fifon] : 0);
 748                         } else {
 749                                 collect_rx_frame(fifo, buf, len,
 750                                                  (len <
 751                                                   maxlen) ? eof[fifon] :
 752                                                  0);
 753                         }
 754                         fifo->last_urblen = len;
 755                 }
 756
 757                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 758                               context_iso_urb->buffer, num_isoc_packets,
 759                               fifo->usb_packet_maxlen, fifo->intervall,
 760                               rx_iso_complete, urb->context);
 761                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 762                 if (errcode < 0) {
 763                         printk(KERN_ERR
 764                                "HFC-S USB: error submitting ISO URB: %d\n",
 765                                errcode);
 766                 }
 767         } else {
 768                 if (status && !hfc->disc_flag) {
 769                         printk(KERN_ERR
 770                                "HFC-S USB: rx_iso_complete : "
 771                                "urb->status %d, fifonum %d\n",
 772                                status, fifon);
 773                 }
 774         }
 775 }
 776
 777 /* collect rx data from INT- and ISO-URBs  */
 778 static void
 779 collect_rx_frame(usb_fifo *fifo, __u8 *data, int len, int finish)
 780 {
 781         hfcusb_data *hfc = fifo->hfc;
 782         int transp_mode, fifon;
 783
 784         fifon = fifo->fifonum;
 785         transp_mode = 0;
 786         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 787                 transp_mode = 1;
 788
 789         if (!fifo->skbuff) {
 790                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 791                 if (!fifo->skbuff) {
 792                         printk(KERN_ERR
 793                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 794                                fifon);
 795                         return;
 796                 }
 797         }
 798         if (len) {
 799                 if (fifo->skbuff->len + len < fifo->max_size) {
 800                         skb_put_data(fifo->skbuff, data, len);
 801                 } else {
 802                         DBG(HFCUSB_DBG_FIFO_ERR,
 803                             "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 804                             fifo->max_size, fifon);
 805                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 806                         skb_trim(fifo->skbuff, 0);
 807                 }
 808         }
 809         if (transp_mode && fifo->skbuff->len >= 128) {
 810                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 811                                 fifo->skbuff);
 812                 fifo->skbuff = NULL;
 813                 return;
 814         }
 815         /* we have a complete hdlc packet */
 816         if (finish) {
 817                 if (fifo->skbuff->len > 3 &&
 818                     !fifo->skbuff->data[fifo->skbuff->len - 1]) {
 819
 820                         if (fifon == HFCUSB_D_RX) {
 821                                 DBG(HFCUSB_DBG_DCHANNEL,
 822                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 823                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 824                         }
 825
 826                         /* remove CRC & status */
 827                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 828                         if (fifon == HFCUSB_PCM_RX) {
 829                                 fifo->hif->l1l2(fifo->hif,
 830                                                 PH_DATA_E | INDICATION,
 831                                                 fifo->skbuff);
 832                         } else
 833                                 fifo->hif->l1l2(fifo->hif,
 834                                                 PH_DATA | INDICATION,
 835                                                 fifo->skbuff);
 836                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 837                 } else {
 838                         DBG(HFCUSB_DBG_FIFO_ERR,
 839                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 840                             fifo->skbuff->len, fifon);
 841                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 842                         skb_trim(fifo->skbuff, 0);
 843                 }
 844         }
 845 }
 846
 847 static void
 848 rx_int_complete(struct urb *urb)
 849 {
 850         int len;
 851         int status;
 852         __u8 *buf, maxlen, fifon;
 853         usb_fifo *fifo = (usb_fifo *) urb->context;
 854         hfcusb_data *hfc = fifo->hfc;
 855         static __u8 eof[8];
 856
 857         urb->dev = hfc->dev;    /* security init */
 858
 859         fifon = fifo->fifonum;
 860         if ((!fifo->active) || (urb->status)) {
 861                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 862                     fifon, urb->status);
 863
 864                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 865                 if (fifo->skbuff) {
 866                         dev_kfree_skb_any(fifo->skbuff);
 867                         fifo->skbuff = NULL;
 868                 }
 869                 return;
 870         }
 871         len = urb->actual_length;
 872         buf = fifo->buffer;
 873         maxlen = fifo->usb_packet_maxlen;
 874
 875         if (fifon == HFCUSB_D_RX) {
 876                 DBG(HFCUSB_DBG_VERBOSE_USB,
 877                     "HFC-S USB: INT-D-RX lst_urblen:%2d "
 878                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 879                     fifo->last_urblen, len, maxlen,
 880                     eof[5]);
 881                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 882         }
 883
 884         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 885                 /* the threshold mask is in the 2nd status byte */
 886                 hfc->threshold_mask = buf[1];
 887                 /* the S0 state is in the upper half of the 1st status byte */
 888                 s0_state_handler(hfc, buf[0] >> 4);
 889                 eof[fifon] = buf[0] & 1;
 890                 /* if we have more than the 2 status bytes -> collect data */
 891                 if (len > 2)
 892                         collect_rx_frame(fifo, buf + 2,
 893                                          urb->actual_length - 2,
 894                                          (len < maxlen) ? eof[fifon] : 0);
 895         } else {
 896                 collect_rx_frame(fifo, buf, urb->actual_length,
 897                                  (len < maxlen) ? eof[fifon] : 0);
 898         }
 899         fifo->last_urblen = urb->actual_length;
 900         status = usb_submit_urb(urb, GFP_ATOMIC);
 901         if (status) {
 902                 printk(KERN_INFO
 903                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 904                        __func__, fifon);
 905         }
 906 }
 907
 908 /* start initial INT-URB for certain fifo */
 909 static void
 910 start_int_fifo(usb_fifo *fifo)
 911 {
 912         int errcode;
 913
 914         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 915             fifo->fifonum);
 916
 917         if (!fifo->urb) {
 918                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 919                 if (!fifo->urb)
 920                         return;
 921         }
 922         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 923                          fifo->buffer, fifo->usb_packet_maxlen,
 924                          rx_int_complete, fifo, fifo->intervall);
 925         fifo->active = 1;       /* must be marked active */
 926         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 927         if (errcode) {
 928                 printk(KERN_ERR "HFC-S USB: submit URB error(%s): status:%i\n",
 929                        __func__, errcode);
 930                 fifo->active = 0;
 931                 fifo->skbuff = NULL;
 932         }
 933 }
 934
 935 static void
 936 setup_bchannel(hfcusb_data *hfc, int channel, int mode)
 937 {
 938         __u8 val, idx_table[2] = { 0, 2 };
 939
 940         if (hfc->disc_flag) {
 941                 return;
 942         }
 943         DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
 944             channel, mode);
 945         hfc->b_mode[channel] = mode;
 946
 947         /* setup CON_HDLC */
 948         val = 0;
 949         if (mode != L1_MODE_NULL)
 950                 val = 8;        /* enable fifo? */
 951         if (mode == L1_MODE_TRANS)
 952                 val |= 2;       /* set transparent bit */
 953
 954         /* set FIFO to transmit register */
 955         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
 956         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 957         /* reset fifo */
 958         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 959         /* set FIFO to receive register */
 960         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
 961         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 962         /* reset fifo */
 963         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 964
 965         val = 0x40;
 966         if (hfc->b_mode[0])
 967                 val |= 1;
 968         if (hfc->b_mode[1])
 969                 val |= 2;
 970         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
 971
 972         val = 0;
 973         if (hfc->b_mode[0])
 974                 val |= 1;
 975         if (hfc->b_mode[1])
 976                 val |= 2;
 977         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
 978
 979         if (mode == L1_MODE_NULL) {
 980                 if (channel)
 981                         handle_led(hfc, LED_B2_OFF);
 982                 else
 983                         handle_led(hfc, LED_B1_OFF);
 984         } else {
 985                 if (channel)
 986                         handle_led(hfc, LED_B2_ON);
 987                 else
 988                         handle_led(hfc, LED_B1_ON);
 989         }
 990 }
 991
 992 static void
 993 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
 994 {
 995         usb_fifo *fifo = my_hisax_if->priv;
 996         hfcusb_data *hfc = fifo->hfc;
 997
 998         switch (pr) {
 999         case PH_ACTIVATE | REQUEST:
1000                 if (fifo->fifonum == HFCUSB_D_TX) {
1001                         DBG(HFCUSB_DBG_STATES,
1002                             "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1003
1004                         if (hfc->l1_state != 3
1005                             && hfc->l1_state != 7) {
1006                                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1007                                                    PH_DEACTIVATE |
1008                                                    INDICATION,
1009                                                    NULL);
1010                                 DBG(HFCUSB_DBG_STATES,
1011                                     "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1012                         } else {
1013                                 if (hfc->l1_state == 7) {       /* l1 already active */
1014                                         hfc->d_if.ifc.l1l2(&hfc->
1015                                                            d_if.
1016                                                            ifc,
1017                                                            PH_ACTIVATE
1018                                                            |
1019                                                            INDICATION,
1020                                                            NULL);
1021                                         DBG(HFCUSB_DBG_STATES,
1022                                             "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1023                                 } else {
1024                                         /* force sending sending INFO1 */
1025                                         queue_control_request(hfc,
1026                                                               HFCUSB_STATES,
1027                                                               0x14,
1028                                                               1);
1029                                         mdelay(1);
1030                                         /* start l1 activation */
1031                                         queue_control_request(hfc,
1032                                                               HFCUSB_STATES,
1033                                                               0x04,
1034                                                               1);
1035                                         if (!timer_pending
1036                                             (&hfc->t3_timer)) {
1037                                                 hfc->t3_timer.
1038                                                         expires =
1039                                                         jiffies +
1040                                                         (HFC_TIMER_T3 *
1041                                                          HZ) / 1000;
1042                                                 add_timer(&hfc->
1043                                                           t3_timer);
1044                                         }
1045                                 }
1046                         }
1047                 } else {
1048                         DBG(HFCUSB_DBG_STATES,
1049                             "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1050                         setup_bchannel(hfc,
1051                                        (fifo->fifonum ==
1052                                         HFCUSB_B1_TX) ? 0 : 1,
1053                                        (long) arg);
1054                         fifo->hif->l1l2(fifo->hif,
1055                                         PH_ACTIVATE | INDICATION,
1056                                         NULL);
1057                 }
1058                 break;
1059         case PH_DEACTIVATE | REQUEST:
1060                 if (fifo->fifonum == HFCUSB_D_TX) {
1061                         DBG(HFCUSB_DBG_STATES,
1062                             "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1063                 } else {
1064                         DBG(HFCUSB_DBG_STATES,
1065                             "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1066                         setup_bchannel(hfc,
1067                                        (fifo->fifonum ==
1068                                         HFCUSB_B1_TX) ? 0 : 1,
1069                                        (int) L1_MODE_NULL);
1070                         fifo->hif->l1l2(fifo->hif,
1071                                         PH_DEACTIVATE | INDICATION,
1072                                         NULL);
1073                 }
1074                 break;
1075         case PH_DATA | REQUEST:
1076                 if (fifo->skbuff && fifo->delete_flg) {
1077                         dev_kfree_skb_any(fifo->skbuff);
1078                         fifo->skbuff = NULL;
1079                         fifo->delete_flg = 0;
1080                 }
1081                 fifo->skbuff = arg;     /* we have a new buffer */
1082                 break;
1083         default:
1084                 DBG(HFCUSB_DBG_STATES,
1085                     "HFC_USB: hfc_usb_d_l2l1: unknown state : %#x", pr);
1086                 break;
1087         }
1088 }
1089
1090 /* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1091 static int
1092 hfc_usb_init(hfcusb_data *hfc)
1093 {
1094         usb_fifo *fifo;
1095         int i;
1096         u_char b;
1097         struct hisax_b_if *p_b_if[2];
1098
1099         /* check the chip id */
1100         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1101                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1102                 return (1);
1103         }
1104         if (b != HFCUSB_CHIPID) {
1105                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1106                 return (1);
1107         }
1108
1109         /* first set the needed config, interface and alternate */
1110         usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1111
1112         /* do Chip reset */
1113         write_usb(hfc, HFCUSB_CIRM, 8);
1114         /* aux = output, reset off */
1115         write_usb(hfc, HFCUSB_CIRM, 0x10);
1116
1117         /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1118         write_usb(hfc, HFCUSB_USB_SIZE,
1119                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1120
1121         /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1122         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1123
1124         /* enable PCM/GCI master mode */
1125         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1126         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1127
1128         /* init the fifos */
1129         write_usb(hfc, HFCUSB_F_THRES,
1130                   (HFCUSB_TX_THRESHOLD /
1131                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1132
1133         fifo = hfc->fifos;
1134         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1135                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1136                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1137                 fifo[i].max_size =
1138                         (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1139                 fifo[i].last_urblen = 0;
1140                 /* set 2 bit for D- & E-channel */
1141                 write_usb(hfc, HFCUSB_HDLC_PAR,
1142                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1143                 /* rx hdlc, enable IFF for D-channel */
1144                 write_usb(hfc, HFCUSB_CON_HDLC,
1145                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1146                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1147         }
1148
1149         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1150         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1151         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1152
1153         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1154         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1155
1156         /* set both B-channel to not connected */
1157         hfc->b_mode[0] = L1_MODE_NULL;
1158         hfc->b_mode[1] = L1_MODE_NULL;
1159
1160         hfc->l1_activated = 0;
1161         hfc->disc_flag = 0;
1162         hfc->led_state = 0;
1163         hfc->old_led_state = 0;
1164
1165         /* init the t3 timer */
1166         timer_setup(&hfc->t3_timer, l1_timer_expire_t3, 0);
1167
1168         /* init the t4 timer */
1169         timer_setup(&hfc->t4_timer, l1_timer_expire_t4, 0);
1170
1171         /* init the background machinery for control requests */
1172         hfc->ctrl_read.bRequestType = 0xc0;
1173         hfc->ctrl_read.bRequest = 1;
1174         hfc->ctrl_read.wLength = cpu_to_le16(1);
1175         hfc->ctrl_write.bRequestType = 0x40;
1176         hfc->ctrl_write.bRequest = 0;
1177         hfc->ctrl_write.wLength = 0;
1178         usb_fill_control_urb(hfc->ctrl_urb,
1179                              hfc->dev,
1180                              hfc->ctrl_out_pipe,
1181                              (u_char *)&hfc->ctrl_write,
1182                              NULL, 0, ctrl_complete, hfc);
1183         /* Init All Fifos */
1184         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1185                 hfc->fifos[i].iso[0].purb = NULL;
1186                 hfc->fifos[i].iso[1].purb = NULL;
1187                 hfc->fifos[i].active = 0;
1188         }
1189         /* register Modul to upper Hisax Layers */
1190         hfc->d_if.owner = THIS_MODULE;
1191         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1192         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1193         for (i = 0; i < 2; i++) {
1194                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1195                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1196                 p_b_if[i] = &hfc->b_if[i];
1197         }
1198         /* default Prot: EURO ISDN, should be a module_param */
1199         hfc->protocol = 2;
1200         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1201         if (i) {
1202                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1203                 return i;
1204         }
1205
1206 #ifdef CONFIG_HISAX_DEBUG
1207         hfc_debug = debug;
1208 #endif
1209
1210         for (i = 0; i < 4; i++)
1211                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1212         for (i = 4; i < 8; i++)
1213                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1214
1215         /* 3 (+1) INT IN + 3 ISO OUT */
1216         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1217                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1218                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1219                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1220                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1221                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1222         }
1223         /* 3 (+1) ISO IN + 3 ISO OUT */
1224         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1225                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1226                                  rx_iso_complete, 16);
1227                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1228                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1229                                          ISOC_PACKETS_D, rx_iso_complete,
1230                                          16);
1231                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1232                                  rx_iso_complete, 16);
1233                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1234                                  rx_iso_complete, 16);
1235         }
1236
1237         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1238                          tx_iso_complete, 1);
1239         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1240                          tx_iso_complete, 1);
1241         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1242                          tx_iso_complete, 1);
1243
1244         handle_led(hfc, LED_POWER_ON);
1245
1246         return (0);
1247 }
1248
1249 /* initial callback for each plugged USB device */
1250 static int
1251 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1252 {
1253         struct usb_device *dev = interface_to_usbdev(intf);
1254         hfcusb_data *context;
1255         struct usb_host_interface *iface = intf->cur_altsetting;
1256         struct usb_host_interface *iface_used = NULL;
1257         struct usb_host_endpoint *ep;
1258         int ifnum = iface->desc.bInterfaceNumber;
1259         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1260                 attr, cfg_found, cidx, ep_addr;
1261         int cmptbl[16], small_match, iso_packet_size, packet_size,
1262                 alt_used = 0;
1263         hfcsusb_vdata *driver_info;
1264
1265         vend_idx = 0xffff;
1266         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1267                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1268                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1269                         vend_idx = i;
1270                         continue;
1271                 }
1272         }
1273
1274         printk(KERN_INFO
1275                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1276                ifnum, iface->desc.bAlternateSetting, intf->minor);
1277
1278         if (vend_idx != 0xffff) {
1279                 /* if vendor and product ID is OK, start probing alternate settings */
1280                 alt_idx = 0;
1281                 small_match = 0xffff;
1282
1283                 /* default settings */
1284                 iso_packet_size = 16;
1285                 packet_size = 64;
1286
1287                 while (alt_idx < intf->num_altsetting) {
1288                         iface = intf->altsetting + alt_idx;
1289                         probe_alt_setting = iface->desc.bAlternateSetting;
1290                         cfg_used = 0;
1291
1292                         /* check for config EOL element */
1293                         while (validconf[cfg_used][0]) {
1294                                 cfg_found = 1;
1295                                 vcf = validconf[cfg_used];
1296                                 /* first endpoint descriptor */
1297                                 ep = iface->endpoint;
1298
1299                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1300
1301                                 /* check for all endpoints in this alternate setting */
1302                                 for (i = 0; i < iface->desc.bNumEndpoints;
1303                                      i++) {
1304                                         ep_addr =
1305                                                 ep->desc.bEndpointAddress;
1306                                         /* get endpoint base */
1307                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1308                                         if (ep_addr & 0x80)
1309                                                 idx++;
1310                                         attr = ep->desc.bmAttributes;
1311                                         if (cmptbl[idx] == EP_NUL) {
1312                                                 cfg_found = 0;
1313                                         }
1314                                         if (attr == USB_ENDPOINT_XFER_INT
1315                                             && cmptbl[idx] == EP_INT)
1316                                                 cmptbl[idx] = EP_NUL;
1317                                         if (attr == USB_ENDPOINT_XFER_BULK
1318                                             && cmptbl[idx] == EP_BLK)
1319                                                 cmptbl[idx] = EP_NUL;
1320                                         if (attr == USB_ENDPOINT_XFER_ISOC
1321                                             && cmptbl[idx] == EP_ISO)
1322                                                 cmptbl[idx] = EP_NUL;
1323
1324                                         /* check if all INT endpoints match minimum interval */
1325                                         if ((attr == USB_ENDPOINT_XFER_INT)
1326                                             && (ep->desc.bInterval < vcf[17])) {
1327                                                 cfg_found = 0;
1328                                         }
1329                                         ep++;
1330                                 }
1331                                 for (i = 0; i < 16; i++) {
1332                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1333                                         if (cmptbl[i] != EP_NOP
1334                                             && cmptbl[i] != EP_NUL)
1335                                                 cfg_found = 0;
1336                                 }
1337                                 if (cfg_found) {
1338                                         if (cfg_used < small_match) {
1339                                                 small_match = cfg_used;
1340                                                 alt_used =
1341                                                         probe_alt_setting;
1342                                                 iface_used = iface;
1343                                         }
1344                                 }
1345                                 cfg_used++;
1346                         }
1347                         alt_idx++;
1348                 } /* (alt_idx < intf->num_altsetting) */
1349
1350                 /* found a valid USB Ta Endpint config */
1351                 if (small_match != 0xffff) {
1352                         iface = iface_used;
1353                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1354                                 return (-ENOMEM);       /* got no mem */
1355
1356                         ep = iface->endpoint;
1357                         vcf = validconf[small_match];
1358
1359                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1360                                 ep_addr = ep->desc.bEndpointAddress;
1361                                 /* get endpoint base */
1362                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1363                                 if (ep_addr & 0x80)
1364                                         idx++;
1365                                 cidx = idx & 7;
1366                                 attr = ep->desc.bmAttributes;
1367
1368                                 /* init Endpoints */
1369                                 if (vcf[idx] != EP_NOP
1370                                     && vcf[idx] != EP_NUL) {
1371                                         switch (attr) {
1372                                         case USB_ENDPOINT_XFER_INT:
1373                                                 context->
1374                                                         fifos[cidx].
1375                                                         pipe =
1376                                                         usb_rcvintpipe
1377                                                         (dev,
1378                                                          ep->desc.
1379                                                          bEndpointAddress);
1380                                                 context->
1381                                                         fifos[cidx].
1382                                                         usb_transfer_mode
1383                                                         = USB_INT;
1384                                                 packet_size =
1385                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1386                                                 break;
1387                                         case USB_ENDPOINT_XFER_BULK:
1388                                                 if (ep_addr & 0x80)
1389                                                         context->
1390                                                                 fifos
1391                                                                 [cidx].
1392                                                                 pipe =
1393                                                                 usb_rcvbulkpipe
1394                                                                 (dev,
1395                                                                  ep->
1396                                                                  desc.
1397                                                                  bEndpointAddress);
1398                                                 else
1399                                                         context->
1400                                                                 fifos
1401                                                                 [cidx].
1402                                                                 pipe =
1403                                                                 usb_sndbulkpipe
1404                                                                 (dev,
1405                                                                  ep->
1406                                                                  desc.
1407                                                                  bEndpointAddress);
1408                                                 context->
1409                                                         fifos[cidx].
1410                                                         usb_transfer_mode
1411                                                         = USB_BULK;
1412                                                 packet_size =
1413                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1414                                                 break;
1415                                         case USB_ENDPOINT_XFER_ISOC:
1416                                                 if (ep_addr & 0x80)
1417                                                         context->
1418                                                                 fifos
1419                                                                 [cidx].
1420                                                                 pipe =
1421                                                                 usb_rcvisocpipe
1422                                                                 (dev,
1423                                                                  ep->
1424                                                                  desc.
1425                                                                  bEndpointAddress);
1426                                                 else
1427                                                         context->
1428                                                                 fifos
1429                                                                 [cidx].
1430                                                                 pipe =
1431                                                                 usb_sndisocpipe
1432                                                                 (dev,
1433                                                                  ep->
1434                                                                  desc.
1435                                                                  bEndpointAddress);
1436                                                 context->
1437                                                         fifos[cidx].
1438                                                         usb_transfer_mode
1439                                                         = USB_ISOC;
1440                                                 iso_packet_size =
1441                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1442                                                 break;
1443                                         default:
1444                                                 context->
1445                                                         fifos[cidx].
1446                                                         pipe = 0;
1447                                         }       /* switch attribute */
1448
1449                                         if (context->fifos[cidx].pipe) {
1450                                                 context->fifos[cidx].
1451                                                         fifonum = cidx;
1452                                                 context->fifos[cidx].hfc =
1453                                                         context;
1454                                                 context->fifos[cidx].usb_packet_maxlen =
1455                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1456                                                 context->fifos[cidx].
1457                                                         intervall =
1458                                                         ep->desc.bInterval;
1459                                                 context->fifos[cidx].
1460                                                         skbuff = NULL;
1461                                         }
1462                                 }
1463                                 ep++;
1464                         }
1465                         context->dev = dev;     /* save device */
1466                         context->if_used = ifnum;       /* save used interface */
1467                         context->alt_used = alt_used;   /* and alternate config */
1468                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1469                         context->cfg_used = vcf[16];    /* store used config */
1470                         context->vend_idx = vend_idx;   /* store found vendor */
1471                         context->packet_size = packet_size;
1472                         context->iso_packet_size = iso_packet_size;
1473
1474                         /* create the control pipes needed for register access */
1475                         context->ctrl_in_pipe =
1476                                 usb_rcvctrlpipe(context->dev, 0);
1477                         context->ctrl_out_pipe =
1478                                 usb_sndctrlpipe(context->dev, 0);
1479
1480                         driver_info = (hfcsusb_vdata *)
1481                                       hfcusb_idtab[vend_idx].driver_info;
1482
1483                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1484
1485                         if (!context->ctrl_urb) {
1486                                 pr_warn("%s: No memory for control urb\n",
1487                                         driver_info->vend_name);
1488                                 kfree(context);
1489                                 return -ENOMEM;
1490                         }
1491
1492                         pr_info("HFC-S USB: detected \"%s\"\n",
1493                                 driver_info->vend_name);
1494
1495                         DBG(HFCUSB_DBG_INIT,
1496                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1497                             conf_str[small_match], context->if_used,
1498                             context->alt_used,
1499                             validconf[small_match][18]);
1500
1501                         /* init the chip and register the driver */
1502                         if (hfc_usb_init(context)) {
1503                                 usb_kill_urb(context->ctrl_urb);
1504                                 usb_free_urb(context->ctrl_urb);
1505                                 context->ctrl_urb = NULL;
1506                                 kfree(context);
1507                                 return (-EIO);
1508                         }
1509                         usb_set_intfdata(intf, context);
1510                         return (0);
1511                 }
1512         } else {
1513                 printk(KERN_INFO
1514                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1515         }
1516         return (-EIO);
1517 }
1518
1519 /* callback for unplugged USB device */
1520 static void
1521 hfc_usb_disconnect(struct usb_interface *intf)
1522 {
1523         hfcusb_data *context = usb_get_intfdata(intf);
1524         int i;
1525
1526         handle_led(context, LED_POWER_OFF);
1527         schedule_timeout(HZ / 100);
1528
1529         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1530         context->disc_flag = 1;
1531         usb_set_intfdata(intf, NULL);
1532
1533         if (timer_pending(&context->t3_timer))
1534                 del_timer(&context->t3_timer);
1535         if (timer_pending(&context->t4_timer))
1536                 del_timer(&context->t4_timer);
1537
1538         /* tell all fifos to terminate */
1539         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1540                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1541                         if (context->fifos[i].active > 0) {
1542                                 stop_isoc_chain(&context->fifos[i]);
1543                                 DBG(HFCUSB_DBG_INIT,
1544                                     "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1545                                     __func__, i);
1546                         }
1547                 } else {
1548                         if (context->fifos[i].active > 0) {
1549                                 context->fifos[i].active = 0;
1550                                 DBG(HFCUSB_DBG_INIT,
1551                                     "HFC-S USB: %s unlinking URB for Fifo(%i)",
1552                                     __func__, i);
1553                         }
1554                         usb_kill_urb(context->fifos[i].urb);
1555                         usb_free_urb(context->fifos[i].urb);
1556                         context->fifos[i].urb = NULL;
1557                 }
1558                 context->fifos[i].active = 0;
1559         }
1560         usb_kill_urb(context->ctrl_urb);
1561         usb_free_urb(context->ctrl_urb);
1562         context->ctrl_urb = NULL;
1563         hisax_unregister(&context->d_if);
1564         kfree(context);         /* free our structure again */
1565 }
1566
1567 static struct usb_driver hfc_drv = {
1568         .name  = "hfc_usb",
1569         .id_table = hfcusb_idtab,
1570         .probe = hfc_usb_probe,
1571         .disconnect = hfc_usb_disconnect,
1572         .disable_hub_initiated_lpm = 1,
1573 };
1574
1575 static void __exit
1576 hfc_usb_mod_exit(void)
1577 {
1578         usb_deregister(&hfc_drv); /* release our driver */
1579         printk(KERN_INFO "HFC-S USB: module removed\n");
1580 }
1581
1582 static int __init
1583 hfc_usb_mod_init(void)
1584 {
1585         char revstr[30], datestr[30], dummy[30];
1586 #ifndef CONFIG_HISAX_DEBUG
1587         hfc_debug = debug;
1588 #endif
1589         sscanf(hfcusb_revision,
1590                "%s %s $ %s %s %s $ ", dummy, revstr,
1591                dummy, datestr, dummy);
1592         printk(KERN_INFO
1593                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1594                revstr, datestr, debug);
1595         if (usb_register(&hfc_drv)) {
1596                 printk(KERN_INFO
1597                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1598                 return (-1);    /* unable to register */
1599         }
1600         return (0);
1601 }
1602
1603 module_init(hfc_usb_mod_init);
1604 module_exit(hfc_usb_mod_exit);
1605 MODULE_AUTHOR(DRIVER_AUTHOR);
1606 MODULE_DESCRIPTION(DRIVER_DESC);
1607 MODULE_LICENSE("GPL");
1608 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);