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 "hisax.h"
  43 #include "hisax_if.h"
  44 #include "hfc_usb.h"
  45
  46 static const char *hfcusb_revision =
  47     "$Revision: 2.3.2.24 $ $Date: 2007/10/14 08:40:29 $ ";
  48
  49 /* Hisax debug support
  50 *  debug flags defined in hfc_usb.h as HFCUSB_DBG_[*]
  51 */
  52 #define __debug_variable hfc_debug
  53 #include "hisax_debug.h"
  54 static u_int debug;
  55 module_param(debug, uint, 0);
  56 static int hfc_debug;
  57
  58
  59 /* private vendor specific data */
  60 typedef struct {
  61         __u8 led_scheme;        // led display scheme
  62         signed short led_bits[8];       // array of 8 possible LED bitmask settings
  63         char *vend_name;        // device name
  64 } hfcsusb_vdata;
  65
  66 /* VID/PID device list */
  67 static struct usb_device_id hfcusb_idtab[] = {
  68         {
  69          USB_DEVICE(0x0959, 0x2bd0),
  70          .driver_info = (unsigned long) &((hfcsusb_vdata)
  71                           {LED_OFF, {4, 0, 2, 1},
  72                            "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
  73         },
  74         {
  75          USB_DEVICE(0x0675, 0x1688),
  76          .driver_info = (unsigned long) &((hfcsusb_vdata)
  77                           {LED_SCHEME1, {1, 2, 0, 0},
  78                            "DrayTek miniVigor 128 USB ISDN TA"}),
  79         },
  80         {
  81          USB_DEVICE(0x07b0, 0x0007),
  82          .driver_info = (unsigned long) &((hfcsusb_vdata)
  83                           {LED_SCHEME1, {0x80, -64, -32, -16},
  84                            "Billion tiny USB ISDN TA 128"}),
  85         },
  86         {
  87          USB_DEVICE(0x0742, 0x2008),
  88          .driver_info = (unsigned long) &((hfcsusb_vdata)
  89                           {LED_SCHEME1, {4, 0, 2, 1},
  90                            "Stollmann USB TA"}),
  91         },
  92         {
  93          USB_DEVICE(0x0742, 0x2009),
  94          .driver_info = (unsigned long) &((hfcsusb_vdata)
  95                           {LED_SCHEME1, {4, 0, 2, 1},
  96                            "Aceex USB ISDN TA"}),
  97         },
  98         {
  99          USB_DEVICE(0x0742, 0x200A),
 100          .driver_info = (unsigned long) &((hfcsusb_vdata)
 101                           {LED_SCHEME1, {4, 0, 2, 1},
 102                            "OEM USB ISDN TA"}),
 103         },
 104         {
 105          USB_DEVICE(0x08e3, 0x0301),
 106          .driver_info = (unsigned long) &((hfcsusb_vdata)
 107                           {LED_SCHEME1, {2, 0, 1, 4},
 108                            "Olitec USB RNIS"}),
 109         },
 110         {
 111          USB_DEVICE(0x07fa, 0x0846),
 112          .driver_info = (unsigned long) &((hfcsusb_vdata)
 113                           {LED_SCHEME1, {0x80, -64, -32, -16},
 114                            "Bewan Modem RNIS USB"}),
 115         },
 116         {
 117          USB_DEVICE(0x07fa, 0x0847),
 118          .driver_info = (unsigned long) &((hfcsusb_vdata)
 119                           {LED_SCHEME1, {0x80, -64, -32, -16},
 120                            "Djinn Numeris USB"}),
 121         },
 122         {
 123          USB_DEVICE(0x07b0, 0x0006),
 124          .driver_info = (unsigned long) &((hfcsusb_vdata)
 125                           {LED_SCHEME1, {0x80, -64, -32, -16},
 126                            "Twister ISDN TA"}),
 127         },
 128         {
 129          USB_DEVICE(0x071d, 0x1005),
 130          .driver_info = (unsigned long) &((hfcsusb_vdata)
 131                           {LED_SCHEME1, {0x02, 0, 0x01, 0x04},
 132                            "Eicon DIVA USB 4.0"}),
 133         },
 134         { }
 135 };
 136
 137 /* structure defining input+output fifos (interrupt/bulk mode) */
 138 struct usb_fifo;                /* forward definition */
 139 typedef struct iso_urb_struct {
 140         struct urb *purb;
 141         __u8 buffer[ISO_BUFFER_SIZE];   /* buffer incoming/outgoing data */
 142         struct usb_fifo *owner_fifo;    /* pointer to owner fifo */
 143 } iso_urb_struct;
 144
 145 struct hfcusb_data;             /* forward definition */
 146
 147 typedef struct usb_fifo {
 148         int fifonum;            /* fifo index attached to this structure */
 149         int active;             /* fifo is currently active */
 150         struct hfcusb_data *hfc;        /* pointer to main structure */
 151         int pipe;               /* address of endpoint */
 152         __u8 usb_packet_maxlen; /* maximum length for usb transfer */
 153         unsigned int max_size;  /* maximum size of receive/send packet */
 154         __u8 intervall;         /* interrupt interval */
 155         struct sk_buff *skbuff; /* actual used buffer */
 156         struct urb *urb;        /* transfer structure for usb routines */
 157         __u8 buffer[128];       /* buffer incoming/outgoing data */
 158         int bit_line;           /* how much bits are in the fifo? */
 159
 160         volatile __u8 usb_transfer_mode;        /* switched between ISO and INT */
 161         iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
 162         struct hisax_if *hif;   /* hisax interface */
 163         int delete_flg;         /* only delete skbuff once */
 164         int last_urblen;        /* remember length of last packet */
 165 } usb_fifo;
 166
 167 /* structure holding all data for one device */
 168 typedef struct hfcusb_data {
 169         /* HiSax Interface for loadable Layer1 drivers */
 170         struct hisax_d_if d_if;         /* see hisax_if.h */
 171         struct hisax_b_if b_if[2];      /* see hisax_if.h */
 172         int protocol;
 173
 174         struct usb_device *dev; /* our device */
 175         int if_used;            /* used interface number */
 176         int alt_used;           /* used alternate config */
 177         int ctrl_paksize;       /* control pipe packet size */
 178         int ctrl_in_pipe,       /* handles for control pipe */
 179             ctrl_out_pipe;
 180         int cfg_used;           /* configuration index used */
 181         int vend_idx;           /* vendor found */
 182         int b_mode[2];          /* B-channel mode */
 183         int l1_activated;       /* layer 1 activated */
 184         int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
 185         int packet_size, iso_packet_size;
 186
 187         /* control pipe background handling */
 188         ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];  /* buffer holding queued data */
 189         volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;       /* input/output pointer + count */
 190         struct urb *ctrl_urb;   /* transfer structure for control channel */
 191
 192         struct usb_ctrlrequest ctrl_write;      /* buffer for control write request */
 193         struct usb_ctrlrequest ctrl_read;       /* same for read request */
 194
 195         __u8 old_led_state, led_state;
 196
 197         volatile __u8 threshold_mask;   /* threshold actually reported */
 198         volatile __u8 bch_enables;      /* or mask for sctrl_r and sctrl register values */
 199
 200         usb_fifo fifos[HFCUSB_NUM_FIFOS];       /* structure holding all fifo data */
 201
 202         volatile __u8 l1_state; /* actual l1 state */
 203         struct timer_list t3_timer;     /* timer 3 for activation/deactivation */
 204         struct timer_list t4_timer;     /* timer 4 for activation/deactivation */
 205 } hfcusb_data;
 206
 207
 208 static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
 209                              int finish);
 210
 211 static inline const char *
 212 symbolic(struct hfcusb_symbolic_list list[], const int num)
 213 {
 214         int i;
 215         for (i = 0; list[i].name != NULL; i++)
 216                 if (list[i].num == num)
 217                         return (list[i].name);
 218         return "<unknown ERROR>";
 219 }
 220
 221 static void
 222 ctrl_start_transfer(hfcusb_data * hfc)
 223 {
 224         if (hfc->ctrl_cnt) {
 225                 hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
 226                 hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
 227                 hfc->ctrl_urb->transfer_buffer = NULL;
 228                 hfc->ctrl_urb->transfer_buffer_length = 0;
 229                 hfc->ctrl_write.wIndex =
 230                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg);
 231                 hfc->ctrl_write.wValue =
 232                     cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val);
 233
 234                 usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
 235         }
 236 }                               /* ctrl_start_transfer */
 237
 238 static int
 239 queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
 240 {
 241         ctrl_buft *buf;
 242
 243         if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
 244                 return (1);     /* no space left */
 245         buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];        /* pointer to new index */
 246         buf->hfc_reg = reg;
 247         buf->reg_val = val;
 248         buf->action = action;
 249         if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
 250                 hfc->ctrl_in_idx = 0;   /* pointer wrap */
 251         if (++hfc->ctrl_cnt == 1)
 252                 ctrl_start_transfer(hfc);
 253         return (0);
 254 }
 255
 256 static void
 257 ctrl_complete(struct urb *urb)
 258 {
 259         hfcusb_data *hfc = (hfcusb_data *) urb->context;
 260         ctrl_buft *buf;
 261
 262         urb->dev = hfc->dev;
 263         if (hfc->ctrl_cnt) {
 264                 buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
 265                 hfc->ctrl_cnt--;        /* decrement actual count */
 266                 if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 267                         hfc->ctrl_out_idx = 0;  /* pointer wrap */
 268
 269                 ctrl_start_transfer(hfc);       /* start next transfer */
 270         }
 271 }
 272
 273 /* write led data to auxport & invert if necessary */
 274 static void
 275 write_led(hfcusb_data * hfc, __u8 led_state)
 276 {
 277         if (led_state != hfc->old_led_state) {
 278                 hfc->old_led_state = led_state;
 279                 queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
 280         }
 281 }
 282
 283 static void
 284 set_led_bit(hfcusb_data * hfc, signed short led_bits, int on)
 285 {
 286         if (on) {
 287                 if (led_bits < 0)
 288                         hfc->led_state &= ~abs(led_bits);
 289                 else
 290                         hfc->led_state |= led_bits;
 291         } else {
 292                 if (led_bits < 0)
 293                         hfc->led_state |= abs(led_bits);
 294                 else
 295                         hfc->led_state &= ~led_bits;
 296         }
 297 }
 298
 299 /* handle LED requests */
 300 static void
 301 handle_led(hfcusb_data * hfc, int event)
 302 {
 303         hfcsusb_vdata *driver_info =
 304             (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;
 305
 306         /* if no scheme -> no LED action */
 307         if (driver_info->led_scheme == LED_OFF)
 308                 return;
 309
 310         switch (event) {
 311                 case LED_POWER_ON:
 312                         set_led_bit(hfc, driver_info->led_bits[0], 1);
 313                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 314                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 315                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 316                         break;
 317                 case LED_POWER_OFF:
 318                         set_led_bit(hfc, driver_info->led_bits[0], 0);
 319                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 320                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 321                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 322                         break;
 323                 case LED_S0_ON:
 324                         set_led_bit(hfc, driver_info->led_bits[1], 1);
 325                         break;
 326                 case LED_S0_OFF:
 327                         set_led_bit(hfc, driver_info->led_bits[1], 0);
 328                         break;
 329                 case LED_B1_ON:
 330                         set_led_bit(hfc, driver_info->led_bits[2], 1);
 331                         break;
 332                 case LED_B1_OFF:
 333                         set_led_bit(hfc, driver_info->led_bits[2], 0);
 334                         break;
 335                 case LED_B2_ON:
 336                         set_led_bit(hfc, driver_info->led_bits[3], 1);
 337                         break;
 338                 case LED_B2_OFF:
 339                         set_led_bit(hfc, driver_info->led_bits[3], 0);
 340                         break;
 341         }
 342         write_led(hfc, hfc->led_state);
 343 }
 344
 345 /* ISDN l1 timer T3 expires */
 346 static void
 347 l1_timer_expire_t3(hfcusb_data * hfc)
 348 {
 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(hfcusb_data * hfc)
 365 {
 366         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 367                            NULL);
 368
 369         DBG(HFCUSB_DBG_STATES,
 370             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 371
 372         hfc->l1_activated = 0;
 373         handle_led(hfc, LED_S0_OFF);
 374 }
 375
 376 /* S0 state changed */
 377 static void
 378 s0_state_handler(hfcusb_data * hfc, __u8 state)
 379 {
 380         __u8 old_state;
 381
 382         old_state = hfc->l1_state;
 383         if (state == old_state || state < 1 || state > 8)
 384                 return;
 385
 386         DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
 387             old_state, state);
 388
 389         if (state < 4 || state == 7 || state == 8) {
 390                 if (timer_pending(&hfc->t3_timer))
 391                         del_timer(&hfc->t3_timer);
 392                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
 393         }
 394         if (state >= 7) {
 395                 if (timer_pending(&hfc->t4_timer))
 396                         del_timer(&hfc->t4_timer);
 397                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
 398         }
 399
 400         if (state == 7 && !hfc->l1_activated) {
 401                 hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 402                                    PH_ACTIVATE | INDICATION, NULL);
 403                 DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 404                 hfc->l1_activated = 1;
 405                 handle_led(hfc, LED_S0_ON);
 406         } else if (state <= 3 /* && activated */ ) {
 407                 if (old_state == 7 || old_state == 8) {
 408                         DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
 409                         if (!timer_pending(&hfc->t4_timer)) {
 410                                 hfc->t4_timer.expires =
 411                                     jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 412                                 add_timer(&hfc->t4_timer);
 413                         }
 414                 } else {
 415                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 416                                            PH_DEACTIVATE | INDICATION,
 417                                            NULL);
 418                         DBG(HFCUSB_DBG_STATES,
 419                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 420                         hfc->l1_activated = 0;
 421                         handle_led(hfc, LED_S0_OFF);
 422                 }
 423         }
 424         hfc->l1_state = state;
 425 }
 426
 427 static void
 428 fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 429               void *buf, int num_packets, int packet_size, int interval,
 430               usb_complete_t complete, void *context)
 431 {
 432         int k;
 433
 434         urb->dev = dev;
 435         urb->pipe = pipe;
 436         urb->complete = complete;
 437         urb->number_of_packets = num_packets;
 438         urb->transfer_buffer_length = packet_size * num_packets;
 439         urb->context = context;
 440         urb->transfer_buffer = buf;
 441         urb->transfer_flags = URB_ISO_ASAP;
 442         urb->actual_length = 0;
 443         urb->interval = interval;
 444         for (k = 0; k < num_packets; k++) {
 445                 urb->iso_frame_desc[k].offset = packet_size * k;
 446                 urb->iso_frame_desc[k].length = packet_size;
 447                 urb->iso_frame_desc[k].actual_length = 0;
 448         }
 449 }
 450
 451 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 452  * gaps in the transfer chain
 453  */
 454 static int
 455 start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
 456                  usb_complete_t complete, int packet_size)
 457 {
 458         int i, k, errcode;
 459
 460         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 461             fifo->fifonum);
 462
 463         /* allocate Memory for Iso out Urbs */
 464         for (i = 0; i < 2; i++) {
 465                 if (!(fifo->iso[i].purb)) {
 466                         fifo->iso[i].purb =
 467                             usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 468                         if (!(fifo->iso[i].purb)) {
 469                                 printk(KERN_INFO
 470                                        "alloc urb for fifo %i failed!!!",
 471                                        fifo->fifonum);
 472                         }
 473                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 474
 475                         /* Init the first iso */
 476                         if (ISO_BUFFER_SIZE >=
 477                             (fifo->usb_packet_maxlen *
 478                              num_packets_per_urb)) {
 479                                 fill_isoc_urb(fifo->iso[i].purb,
 480                                               fifo->hfc->dev, fifo->pipe,
 481                                               fifo->iso[i].buffer,
 482                                               num_packets_per_urb,
 483                                               fifo->usb_packet_maxlen,
 484                                               fifo->intervall, complete,
 485                                               &fifo->iso[i]);
 486                                 memset(fifo->iso[i].buffer, 0,
 487                                        sizeof(fifo->iso[i].buffer));
 488                                 /* defining packet delimeters in fifo->buffer */
 489                                 for (k = 0; k < num_packets_per_urb; k++) {
 490                                         fifo->iso[i].purb->
 491                                             iso_frame_desc[k].offset =
 492                                             k * packet_size;
 493                                         fifo->iso[i].purb->
 494                                             iso_frame_desc[k].length =
 495                                             packet_size;
 496                                 }
 497                         } else {
 498                                 printk(KERN_INFO
 499                                        "HFC-S USB: ISO Buffer size to small!\n");
 500                         }
 501                 }
 502                 fifo->bit_line = BITLINE_INF;
 503
 504                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 505                 fifo->active = (errcode >= 0) ? 1 : 0;
 506                 if (errcode < 0)
 507                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 508                                i, errcode, symbolic(urb_errlist, errcode));
 509         }
 510         return (fifo->active);
 511 }
 512
 513 /* stops running iso chain and frees their pending urbs */
 514 static void
 515 stop_isoc_chain(usb_fifo * fifo)
 516 {
 517         int i;
 518
 519         for (i = 0; i < 2; i++) {
 520                 if (fifo->iso[i].purb) {
 521                         DBG(HFCUSB_DBG_INIT,
 522                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 523                             fifo->fifonum, i);
 524                         usb_kill_urb(fifo->iso[i].purb);
 525                         usb_free_urb(fifo->iso[i].purb);
 526                         fifo->iso[i].purb = NULL;
 527                 }
 528         }
 529
 530         usb_kill_urb(fifo->urb);
 531         usb_free_urb(fifo->urb);
 532         fifo->urb = NULL;
 533         fifo->active = 0;
 534 }
 535
 536 /* defines how much ISO packets are handled in one URB */
 537 static int iso_packets[8] =
 538     { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 539         ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 540 };
 541
 542 static void
 543 tx_iso_complete(struct urb *urb)
 544 {
 545         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 546         usb_fifo *fifo = context_iso_urb->owner_fifo;
 547         hfcusb_data *hfc = fifo->hfc;
 548         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 549             errcode;
 550         int frame_complete, transp_mode, fifon, status;
 551         __u8 threshbit;
 552
 553         fifon = fifo->fifonum;
 554         status = urb->status;
 555
 556         tx_offset = 0;
 557
 558         /* ISO transfer only partially completed,
 559            look at individual frame status for details */
 560         if (status == -EXDEV) {
 561                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 562                     ", urb->status %d, fifonum %d\n",
 563                     status, fifon);
 564
 565                 for (k = 0; k < iso_packets[fifon]; ++k) {
 566                         errcode = urb->iso_frame_desc[k].status;
 567                         if (errcode)
 568                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 569                                        "packet %i, status: %i\n",
 570                                        k, errcode);
 571                 }
 572
 573                 // clear status, so go on with ISO transfers
 574                 status = 0;
 575         }
 576
 577         if (fifo->active && !status) {
 578                 transp_mode = 0;
 579                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 580                         transp_mode = 1;
 581
 582                 /* is FifoFull-threshold set for our channel? */
 583                 threshbit = (hfc->threshold_mask & (1 << fifon));
 584                 num_isoc_packets = iso_packets[fifon];
 585
 586                 /* predict dataflow to avoid fifo overflow */
 587                 if (fifon >= HFCUSB_D_TX) {
 588                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 589                 } else {
 590                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 591                 }
 592                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 593                               context_iso_urb->buffer, num_isoc_packets,
 594                               fifo->usb_packet_maxlen, fifo->intervall,
 595                               tx_iso_complete, urb->context);
 596                 memset(context_iso_urb->buffer, 0,
 597                        sizeof(context_iso_urb->buffer));
 598                 frame_complete = 0;
 599
 600                 /* Generate next ISO Packets */
 601                 for (k = 0; k < num_isoc_packets; ++k) {
 602                         if (fifo->skbuff) {
 603                                 len = fifo->skbuff->len;
 604                                 /* we lower data margin every msec */
 605                                 fifo->bit_line -= sink;
 606                                 current_len = (0 - fifo->bit_line) / 8;
 607                                 /* maximum 15 byte for every ISO packet makes our life easier */
 608                                 if (current_len > 14)
 609                                         current_len = 14;
 610                                 current_len =
 611                                     (len <=
 612                                      current_len) ? len : current_len;
 613                                 /* how much bit do we put on the line? */
 614                                 fifo->bit_line += current_len * 8;
 615
 616                                 context_iso_urb->buffer[tx_offset] = 0;
 617                                 if (current_len == len) {
 618                                         if (!transp_mode) {
 619                                                 /* here frame completion */
 620                                                 context_iso_urb->
 621                                                     buffer[tx_offset] = 1;
 622                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 623                                                 fifo->bit_line += 32;
 624                                         }
 625                                         frame_complete = 1;
 626                                 }
 627
 628                                 memcpy(context_iso_urb->buffer +
 629                                        tx_offset + 1, fifo->skbuff->data,
 630                                        current_len);
 631                                 skb_pull(fifo->skbuff, current_len);
 632
 633                                 /* define packet delimeters within the URB buffer */
 634                                 urb->iso_frame_desc[k].offset = tx_offset;
 635                                 urb->iso_frame_desc[k].length =
 636                                     current_len + 1;
 637
 638                                 tx_offset += (current_len + 1);
 639                         } else {
 640                                 urb->iso_frame_desc[k].offset =
 641                                     tx_offset++;
 642
 643                                 urb->iso_frame_desc[k].length = 1;
 644                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 645
 646                                 if (fifo->bit_line < BITLINE_INF) {
 647                                         fifo->bit_line = BITLINE_INF;
 648                                 }
 649                         }
 650
 651                         if (frame_complete) {
 652                                 fifo->delete_flg = 1;
 653                                 fifo->hif->l1l2(fifo->hif,
 654                                                 PH_DATA | CONFIRM,
 655                                                 (void *) (unsigned long) fifo->skbuff->
 656                                                 truesize);
 657                                 if (fifo->skbuff && fifo->delete_flg) {
 658                                         dev_kfree_skb_any(fifo->skbuff);
 659                                         fifo->skbuff = NULL;
 660                                         fifo->delete_flg = 0;
 661                                 }
 662                                 frame_complete = 0;
 663                         }
 664                 }
 665                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 666                 if (errcode < 0) {
 667                         printk(KERN_INFO
 668                                "HFC-S USB: error submitting ISO URB: %d\n",
 669                                errcode);
 670                 }
 671         } else {
 672                 if (status && !hfc->disc_flag) {
 673                         printk(KERN_INFO
 674                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 675                                status, symbolic(urb_errlist, status), fifon);
 676                 }
 677         }
 678 }
 679
 680 static void
 681 rx_iso_complete(struct urb *urb)
 682 {
 683         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 684         usb_fifo *fifo = context_iso_urb->owner_fifo;
 685         hfcusb_data *hfc = fifo->hfc;
 686         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 687             status;
 688         unsigned int iso_status;
 689         __u8 *buf;
 690         static __u8 eof[8];
 691
 692         fifon = fifo->fifonum;
 693         status = urb->status;
 694
 695         if (urb->status == -EOVERFLOW) {
 696                 DBG(HFCUSB_DBG_VERBOSE_USB,
 697                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 698                 status = 0;
 699         }
 700
 701         /* ISO transfer only partially completed,
 702            look at individual frame status for details */
 703         if (status == -EXDEV) {
 704                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 705                     "urb->status %d, fifonum %d\n",
 706                     status, fifon);
 707                 status = 0;
 708         }
 709
 710         if (fifo->active && !status) {
 711                 num_isoc_packets = iso_packets[fifon];
 712                 maxlen = fifo->usb_packet_maxlen;
 713                 for (k = 0; k < num_isoc_packets; ++k) {
 714                         len = urb->iso_frame_desc[k].actual_length;
 715                         offset = urb->iso_frame_desc[k].offset;
 716                         buf = context_iso_urb->buffer + offset;
 717                         iso_status = urb->iso_frame_desc[k].status;
 718
 719                         if (iso_status && !hfc->disc_flag)
 720                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 721                                     "HFC-S USB: rx_iso_complete "
 722                                     "ISO packet %i, status: %i\n",
 723                                     k, iso_status);
 724
 725                         if (fifon == HFCUSB_D_RX) {
 726                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 727                                        "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 728                                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 729                                        fifo->last_urblen, len, maxlen,
 730                                        eof[5]);
 731
 732                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 733                         }
 734
 735                         if (fifo->last_urblen != maxlen) {
 736                                 /* the threshold mask is in the 2nd status byte */
 737                                 hfc->threshold_mask = buf[1];
 738                                 /* care for L1 state only for D-Channel
 739                                    to avoid overlapped iso completions */
 740                                 if (fifon == HFCUSB_D_RX) {
 741                                         /* the S0 state is in the upper half
 742                                            of the 1st status byte */
 743                                         s0_state_handler(hfc, buf[0] >> 4);
 744                                 }
 745                                 eof[fifon] = buf[0] & 1;
 746                                 if (len > 2)
 747                                         collect_rx_frame(fifo, buf + 2,
 748                                                          len - 2,
 749                                                          (len < maxlen) ?
 750                                                          eof[fifon] : 0);
 751                         } else {
 752                                 collect_rx_frame(fifo, buf, len,
 753                                                  (len <
 754                                                   maxlen) ? eof[fifon] :
 755                                                  0);
 756                         }
 757                         fifo->last_urblen = len;
 758                 }
 759
 760                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 761                               context_iso_urb->buffer, num_isoc_packets,
 762                               fifo->usb_packet_maxlen, fifo->intervall,
 763                               rx_iso_complete, urb->context);
 764                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 765                 if (errcode < 0) {
 766                         printk(KERN_ERR
 767                                "HFC-S USB: error submitting ISO URB: %d\n",
 768                                errcode);
 769                 }
 770         } else {
 771                 if (status && !hfc->disc_flag) {
 772                         printk(KERN_ERR
 773                                "HFC-S USB: rx_iso_complete : "
 774                                "urb->status %d, fifonum %d\n",
 775                                status, fifon);
 776                 }
 777         }
 778 }
 779
 780 /* collect rx data from INT- and ISO-URBs  */
 781 static void
 782 collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 783 {
 784         hfcusb_data *hfc = fifo->hfc;
 785         int transp_mode, fifon;
 786
 787         fifon = fifo->fifonum;
 788         transp_mode = 0;
 789         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 790                 transp_mode = 1;
 791
 792         if (!fifo->skbuff) {
 793                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 794                 if (!fifo->skbuff) {
 795                         printk(KERN_ERR
 796                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 797                                fifon);
 798                         return;
 799                 }
 800         }
 801         if (len) {
 802                 if (fifo->skbuff->len + len < fifo->max_size) {
 803                         memcpy(skb_put(fifo->skbuff, len), data, len);
 804                 } else {
 805                         DBG(HFCUSB_DBG_FIFO_ERR,
 806                                "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 807                                fifo->max_size, fifon);
 808                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 809                         skb_trim(fifo->skbuff, 0);
 810                 }
 811         }
 812         if (transp_mode && fifo->skbuff->len >= 128) {
 813                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 814                                 fifo->skbuff);
 815                 fifo->skbuff = NULL;
 816                 return;
 817         }
 818         /* we have a complete hdlc packet */
 819         if (finish) {
 820                 if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
 821                     && (fifo->skbuff->len > 3)) {
 822
 823                         if (fifon == HFCUSB_D_RX) {
 824                                 DBG(HFCUSB_DBG_DCHANNEL,
 825                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 826                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 827                         }
 828
 829                         /* remove CRC & status */
 830                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 831                         if (fifon == HFCUSB_PCM_RX) {
 832                                 fifo->hif->l1l2(fifo->hif,
 833                                                 PH_DATA_E | INDICATION,
 834                                                 fifo->skbuff);
 835                         } else
 836                                 fifo->hif->l1l2(fifo->hif,
 837                                                 PH_DATA | INDICATION,
 838                                                 fifo->skbuff);
 839                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 840                 } else {
 841                         DBG(HFCUSB_DBG_FIFO_ERR,
 842                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 843                             fifo->skbuff->len, fifon);
 844                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 845                         skb_trim(fifo->skbuff, 0);
 846                 }
 847         }
 848 }
 849
 850 static void
 851 rx_int_complete(struct urb *urb)
 852 {
 853         int len;
 854         int status;
 855         __u8 *buf, maxlen, fifon;
 856         usb_fifo *fifo = (usb_fifo *) urb->context;
 857         hfcusb_data *hfc = fifo->hfc;
 858         static __u8 eof[8];
 859
 860         urb->dev = hfc->dev;    /* security init */
 861
 862         fifon = fifo->fifonum;
 863         if ((!fifo->active) || (urb->status)) {
 864                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 865                     fifon, urb->status);
 866
 867                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 868                 if (fifo->skbuff) {
 869                         dev_kfree_skb_any(fifo->skbuff);
 870                         fifo->skbuff = NULL;
 871                 }
 872                 return;
 873         }
 874         len = urb->actual_length;
 875         buf = fifo->buffer;
 876         maxlen = fifo->usb_packet_maxlen;
 877
 878         if (fifon == HFCUSB_D_RX) {
 879                 DBG(HFCUSB_DBG_VERBOSE_USB,
 880                        "HFC-S USB: INT-D-RX lst_urblen:%2d "
 881                        "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 882                        fifo->last_urblen, len, maxlen,
 883                        eof[5]);
 884                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 885         }
 886
 887         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 888                 /* the threshold mask is in the 2nd status byte */
 889                 hfc->threshold_mask = buf[1];
 890                 /* the S0 state is in the upper half of the 1st status byte */
 891                 s0_state_handler(hfc, buf[0] >> 4);
 892                 eof[fifon] = buf[0] & 1;
 893                 /* if we have more than the 2 status bytes -> collect data */
 894                 if (len > 2)
 895                         collect_rx_frame(fifo, buf + 2,
 896                                          urb->actual_length - 2,
 897                                          (len < maxlen) ? eof[fifon] : 0);
 898         } else {
 899                 collect_rx_frame(fifo, buf, urb->actual_length,
 900                                  (len < maxlen) ? eof[fifon] : 0);
 901         }
 902         fifo->last_urblen = urb->actual_length;
 903         status = usb_submit_urb(urb, GFP_ATOMIC);
 904         if (status) {
 905                 printk(KERN_INFO
 906                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 907                        __func__, fifon);
 908         }
 909 }
 910
 911 /* start initial INT-URB for certain fifo */
 912 static void
 913 start_int_fifo(usb_fifo * fifo)
 914 {
 915         int errcode;
 916
 917         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 918             fifo->fifonum);
 919
 920         if (!fifo->urb) {
 921                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 922                 if (!fifo->urb)
 923                         return;
 924         }
 925         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 926                          fifo->buffer, fifo->usb_packet_maxlen,
 927                          rx_int_complete, fifo, fifo->intervall);
 928         fifo->active = 1;       /* must be marked active */
 929         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 930         if (errcode) {
 931                 printk(KERN_ERR
 932                        "HFC-S USB: submit URB error(start_int_info): status:%i\n",
 933                        errcode);
 934                 fifo->active = 0;
 935                 fifo->skbuff = NULL;
 936         }
 937 }
 938
 939 static void
 940 setup_bchannel(hfcusb_data * hfc, int channel, int mode)
 941 {
 942         __u8 val, idx_table[2] = { 0, 2 };
 943
 944         if (hfc->disc_flag) {
 945                 return;
 946         }
 947         DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
 948             channel, mode);
 949         hfc->b_mode[channel] = mode;
 950
 951         /* setup CON_HDLC */
 952         val = 0;
 953         if (mode != L1_MODE_NULL)
 954                 val = 8;        /* enable fifo? */
 955         if (mode == L1_MODE_TRANS)
 956                 val |= 2;       /* set transparent bit */
 957
 958         /* set FIFO to transmit register */
 959         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
 960         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 961         /* reset fifo */
 962         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 963         /* set FIFO to receive register */
 964         queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
 965         queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 966         /* reset fifo */
 967         queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 968
 969         val = 0x40;
 970         if (hfc->b_mode[0])
 971                 val |= 1;
 972         if (hfc->b_mode[1])
 973                 val |= 2;
 974         queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
 975
 976         val = 0;
 977         if (hfc->b_mode[0])
 978                 val |= 1;
 979         if (hfc->b_mode[1])
 980                 val |= 2;
 981         queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
 982
 983         if (mode == L1_MODE_NULL) {
 984                 if (channel)
 985                         handle_led(hfc, LED_B2_OFF);
 986                 else
 987                         handle_led(hfc, LED_B1_OFF);
 988         } else {
 989                 if (channel)
 990                         handle_led(hfc, LED_B2_ON);
 991                 else
 992                         handle_led(hfc, LED_B1_ON);
 993         }
 994 }
 995
 996 static void
 997 hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
 998 {
 999         usb_fifo *fifo = my_hisax_if->priv;
1000         hfcusb_data *hfc = fifo->hfc;
1001
1002         switch (pr) {
1003                 case PH_ACTIVATE | REQUEST:
1004                         if (fifo->fifonum == HFCUSB_D_TX) {
1005                                 DBG(HFCUSB_DBG_STATES,
1006                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1007
1008                                 if (hfc->l1_state != 3
1009                                     && hfc->l1_state != 7) {
1010                                         hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1011                                                            PH_DEACTIVATE |
1012                                                            INDICATION,
1013                                                            NULL);
1014                                         DBG(HFCUSB_DBG_STATES,
1015                                             "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1016                                 } else {
1017                                         if (hfc->l1_state == 7) {       /* l1 already active */
1018                                                 hfc->d_if.ifc.l1l2(&hfc->
1019                                                                    d_if.
1020                                                                    ifc,
1021                                                                    PH_ACTIVATE
1022                                                                    |
1023                                                                    INDICATION,
1024                                                                    NULL);
1025                                                 DBG(HFCUSB_DBG_STATES,
1026                                                     "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1027                                         } else {
1028                                                 /* force sending sending INFO1 */
1029                                                 queue_control_request(hfc,
1030                                                                       HFCUSB_STATES,
1031                                                                       0x14,
1032                                                                       1);
1033                                                 mdelay(1);
1034                                                 /* start l1 activation */
1035                                                 queue_control_request(hfc,
1036                                                                       HFCUSB_STATES,
1037                                                                       0x04,
1038                                                                       1);
1039                                                 if (!timer_pending
1040                                                     (&hfc->t3_timer)) {
1041                                                         hfc->t3_timer.
1042                                                             expires =
1043                                                             jiffies +
1044                                                             (HFC_TIMER_T3 *
1045                                                              HZ) / 1000;
1046                                                         add_timer(&hfc->
1047                                                                   t3_timer);
1048                                                 }
1049                                         }
1050                                 }
1051                         } else {
1052                                 DBG(HFCUSB_DBG_STATES,
1053                                     "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1054                                 setup_bchannel(hfc,
1055                                             (fifo->fifonum ==
1056                                              HFCUSB_B1_TX) ? 0 : 1,
1057                                             (long) arg);
1058                                 fifo->hif->l1l2(fifo->hif,
1059                                                 PH_ACTIVATE | INDICATION,
1060                                                 NULL);
1061                         }
1062                         break;
1063                 case PH_DEACTIVATE | REQUEST:
1064                         if (fifo->fifonum == HFCUSB_D_TX) {
1065                                 DBG(HFCUSB_DBG_STATES,
1066                                     "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1067                         } else {
1068                                 DBG(HFCUSB_DBG_STATES,
1069                                     "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1070                                 setup_bchannel(hfc,
1071                                             (fifo->fifonum ==
1072                                              HFCUSB_B1_TX) ? 0 : 1,
1073                                             (int) L1_MODE_NULL);
1074                                 fifo->hif->l1l2(fifo->hif,
1075                                                 PH_DEACTIVATE | INDICATION,
1076                                                 NULL);
1077                         }
1078                         break;
1079                 case PH_DATA | REQUEST:
1080                         if (fifo->skbuff && fifo->delete_flg) {
1081                                 dev_kfree_skb_any(fifo->skbuff);
1082                                 fifo->skbuff = NULL;
1083                                 fifo->delete_flg = 0;
1084                         }
1085                         fifo->skbuff = arg;     /* we have a new buffer */
1086                         break;
1087                 default:
1088                         DBG(HFCUSB_DBG_STATES,
1089                                "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x", pr);
1090                         break;
1091         }
1092 }
1093
1094 /* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1095 static int
1096 hfc_usb_init(hfcusb_data * hfc)
1097 {
1098         usb_fifo *fifo;
1099         int i, err;
1100         u_char b;
1101         struct hisax_b_if *p_b_if[2];
1102
1103         /* check the chip id */
1104         if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1105                 printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1106                 return (1);
1107         }
1108         if (b != HFCUSB_CHIPID) {
1109                 printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1110                 return (1);
1111         }
1112
1113         /* first set the needed config, interface and alternate */
1114         err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1115
1116         /* do Chip reset */
1117         write_usb(hfc, HFCUSB_CIRM, 8);
1118         /* aux = output, reset off */
1119         write_usb(hfc, HFCUSB_CIRM, 0x10);
1120
1121         /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1122         write_usb(hfc, HFCUSB_USB_SIZE,
1123                   (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1124
1125         /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1126         write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1127
1128         /* enable PCM/GCI master mode */
1129         write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1130         write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1131
1132         /* init the fifos */
1133         write_usb(hfc, HFCUSB_F_THRES,
1134                   (HFCUSB_TX_THRESHOLD /
1135                    8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1136
1137         fifo = hfc->fifos;
1138         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1139                 write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1140                 fifo[i].skbuff = NULL;  /* init buffer pointer */
1141                 fifo[i].max_size =
1142                     (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1143                 fifo[i].last_urblen = 0;
1144                 /* set 2 bit for D- & E-channel */
1145                 write_usb(hfc, HFCUSB_HDLC_PAR,
1146                           ((i <= HFCUSB_B2_RX) ? 0 : 2));
1147                 /* rx hdlc, enable IFF for D-channel */
1148                 write_usb(hfc, HFCUSB_CON_HDLC,
1149                           ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1150                 write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1151         }
1152
1153         write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1154         write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1155         write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1156
1157         write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1158         write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1159
1160         /* set both B-channel to not connected */
1161         hfc->b_mode[0] = L1_MODE_NULL;
1162         hfc->b_mode[1] = L1_MODE_NULL;
1163
1164         hfc->l1_activated = 0;
1165         hfc->disc_flag = 0;
1166         hfc->led_state = 0;
1167         hfc->old_led_state = 0;
1168
1169         /* init the t3 timer */
1170         init_timer(&hfc->t3_timer);
1171         hfc->t3_timer.data = (long) hfc;
1172         hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1173
1174         /* init the t4 timer */
1175         init_timer(&hfc->t4_timer);
1176         hfc->t4_timer.data = (long) hfc;
1177         hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1178
1179         /* init the background machinery for control requests */
1180         hfc->ctrl_read.bRequestType = 0xc0;
1181         hfc->ctrl_read.bRequest = 1;
1182         hfc->ctrl_read.wLength = cpu_to_le16(1);
1183         hfc->ctrl_write.bRequestType = 0x40;
1184         hfc->ctrl_write.bRequest = 0;
1185         hfc->ctrl_write.wLength = 0;
1186         usb_fill_control_urb(hfc->ctrl_urb,
1187                              hfc->dev,
1188                              hfc->ctrl_out_pipe,
1189                              (u_char *) & hfc->ctrl_write,
1190                              NULL, 0, ctrl_complete, hfc);
1191         /* Init All Fifos */
1192         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1193                 hfc->fifos[i].iso[0].purb = NULL;
1194                 hfc->fifos[i].iso[1].purb = NULL;
1195                 hfc->fifos[i].active = 0;
1196         }
1197         /* register Modul to upper Hisax Layers */
1198         hfc->d_if.owner = THIS_MODULE;
1199         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1200         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1201         for (i = 0; i < 2; i++) {
1202                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1203                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1204                 p_b_if[i] = &hfc->b_if[i];
1205         }
1206         /* default Prot: EURO ISDN, should be a module_param */
1207         hfc->protocol = 2;
1208         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1209         if (i) {
1210                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1211                 return i;
1212         }
1213
1214 #ifdef CONFIG_HISAX_DEBUG
1215         hfc_debug = debug;
1216 #endif
1217
1218         for (i = 0; i < 4; i++)
1219                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1220         for (i = 4; i < 8; i++)
1221                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1222
1223         /* 3 (+1) INT IN + 3 ISO OUT */
1224         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1225                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1226                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1227                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1228                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1229                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1230         }
1231         /* 3 (+1) ISO IN + 3 ISO OUT */
1232         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1233                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1234                                  rx_iso_complete, 16);
1235                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1236                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1237                                          ISOC_PACKETS_D, rx_iso_complete,
1238                                          16);
1239                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1240                                  rx_iso_complete, 16);
1241                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1242                                  rx_iso_complete, 16);
1243         }
1244
1245         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1246                          tx_iso_complete, 1);
1247         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1248                          tx_iso_complete, 1);
1249         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1250                          tx_iso_complete, 1);
1251
1252         handle_led(hfc, LED_POWER_ON);
1253
1254         return (0);
1255 }
1256
1257 /* initial callback for each plugged USB device */
1258 static int
1259 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1260 {
1261         struct usb_device *dev = interface_to_usbdev(intf);
1262         hfcusb_data *context;
1263         struct usb_host_interface *iface = intf->cur_altsetting;
1264         struct usb_host_interface *iface_used = NULL;
1265         struct usb_host_endpoint *ep;
1266         int ifnum = iface->desc.bInterfaceNumber;
1267         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1268             attr, cfg_found, cidx, ep_addr;
1269         int cmptbl[16], small_match, iso_packet_size, packet_size,
1270             alt_used = 0;
1271         hfcsusb_vdata *driver_info;
1272
1273         vend_idx = 0xffff;
1274         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1275                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1276                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1277                         vend_idx = i;
1278                         continue;
1279                 }
1280         }
1281
1282         printk(KERN_INFO
1283                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1284                ifnum, iface->desc.bAlternateSetting, intf->minor);
1285
1286         if (vend_idx != 0xffff) {
1287                 /* if vendor and product ID is OK, start probing alternate settings */
1288                 alt_idx = 0;
1289                 small_match = 0xffff;
1290
1291                 /* default settings */
1292                 iso_packet_size = 16;
1293                 packet_size = 64;
1294
1295                 while (alt_idx < intf->num_altsetting) {
1296                         iface = intf->altsetting + alt_idx;
1297                         probe_alt_setting = iface->desc.bAlternateSetting;
1298                         cfg_used = 0;
1299
1300                         /* check for config EOL element */
1301                         while (validconf[cfg_used][0]) {
1302                                 cfg_found = 1;
1303                                 vcf = validconf[cfg_used];
1304                                 /* first endpoint descriptor */
1305                                 ep = iface->endpoint;
1306
1307                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1308
1309                                 /* check for all endpoints in this alternate setting */
1310                                 for (i = 0; i < iface->desc.bNumEndpoints;
1311                                      i++) {
1312                                         ep_addr =
1313                                             ep->desc.bEndpointAddress;
1314                                         /* get endpoint base */
1315                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1316                                         if (ep_addr & 0x80)
1317                                                 idx++;
1318                                         attr = ep->desc.bmAttributes;
1319                                         if (cmptbl[idx] == EP_NUL) {
1320                                                 cfg_found = 0;
1321                                         }
1322                                         if (attr == USB_ENDPOINT_XFER_INT
1323                                             && cmptbl[idx] == EP_INT)
1324                                                 cmptbl[idx] = EP_NUL;
1325                                         if (attr == USB_ENDPOINT_XFER_BULK
1326                                             && cmptbl[idx] == EP_BLK)
1327                                                 cmptbl[idx] = EP_NUL;
1328                                         if (attr == USB_ENDPOINT_XFER_ISOC
1329                                             && cmptbl[idx] == EP_ISO)
1330                                                 cmptbl[idx] = EP_NUL;
1331
1332                                         /* check if all INT endpoints match minimum interval */
1333                                         if ((attr == USB_ENDPOINT_XFER_INT)
1334                                             && (ep->desc.bInterval < vcf[17])) {
1335                                                 cfg_found = 0;
1336                                         }
1337                                         ep++;
1338                                 }
1339                                 for (i = 0; i < 16; i++) {
1340                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1341                                         if (cmptbl[i] != EP_NOP
1342                                             && cmptbl[i] != EP_NUL)
1343                                                 cfg_found = 0;
1344                                 }
1345                                 if (cfg_found) {
1346                                         if (cfg_used < small_match) {
1347                                                 small_match = cfg_used;
1348                                                 alt_used =
1349                                                     probe_alt_setting;
1350                                                 iface_used = iface;
1351                                         }
1352                                 }
1353                                 cfg_used++;
1354                         }
1355                         alt_idx++;
1356                 } /* (alt_idx < intf->num_altsetting) */
1357
1358                 /* found a valid USB Ta Endpint config */
1359                 if (small_match != 0xffff) {
1360                         iface = iface_used;
1361                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1362                                 return (-ENOMEM);       /* got no mem */
1363
1364                         ep = iface->endpoint;
1365                         vcf = validconf[small_match];
1366
1367                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1368                                 ep_addr = ep->desc.bEndpointAddress;
1369                                 /* get endpoint base */
1370                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1371                                 if (ep_addr & 0x80)
1372                                         idx++;
1373                                 cidx = idx & 7;
1374                                 attr = ep->desc.bmAttributes;
1375
1376                                 /* init Endpoints */
1377                                 if (vcf[idx] != EP_NOP
1378                                     && vcf[idx] != EP_NUL) {
1379                                         switch (attr) {
1380                                                 case USB_ENDPOINT_XFER_INT:
1381                                                         context->
1382                                                             fifos[cidx].
1383                                                             pipe =
1384                                                             usb_rcvintpipe
1385                                                             (dev,
1386                                                              ep->desc.
1387                                                              bEndpointAddress);
1388                                                         context->
1389                                                             fifos[cidx].
1390                                                             usb_transfer_mode
1391                                                             = USB_INT;
1392                                                         packet_size =
1393                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1394                                                         break;
1395                                                 case USB_ENDPOINT_XFER_BULK:
1396                                                         if (ep_addr & 0x80)
1397                                                                 context->
1398                                                                     fifos
1399                                                                     [cidx].
1400                                                                     pipe =
1401                                                                     usb_rcvbulkpipe
1402                                                                     (dev,
1403                                                                      ep->
1404                                                                      desc.
1405                                                                      bEndpointAddress);
1406                                                         else
1407                                                                 context->
1408                                                                     fifos
1409                                                                     [cidx].
1410                                                                     pipe =
1411                                                                     usb_sndbulkpipe
1412                                                                     (dev,
1413                                                                      ep->
1414                                                                      desc.
1415                                                                      bEndpointAddress);
1416                                                         context->
1417                                                             fifos[cidx].
1418                                                             usb_transfer_mode
1419                                                             = USB_BULK;
1420                                                         packet_size =
1421                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1422                                                         break;
1423                                                 case USB_ENDPOINT_XFER_ISOC:
1424                                                         if (ep_addr & 0x80)
1425                                                                 context->
1426                                                                     fifos
1427                                                                     [cidx].
1428                                                                     pipe =
1429                                                                     usb_rcvisocpipe
1430                                                                     (dev,
1431                                                                      ep->
1432                                                                      desc.
1433                                                                      bEndpointAddress);
1434                                                         else
1435                                                                 context->
1436                                                                     fifos
1437                                                                     [cidx].
1438                                                                     pipe =
1439                                                                     usb_sndisocpipe
1440                                                                     (dev,
1441                                                                      ep->
1442                                                                      desc.
1443                                                                      bEndpointAddress);
1444                                                         context->
1445                                                             fifos[cidx].
1446                                                             usb_transfer_mode
1447                                                             = USB_ISOC;
1448                                                         iso_packet_size =
1449                                                             le16_to_cpu(ep->desc.wMaxPacketSize);
1450                                                         break;
1451                                                 default:
1452                                                         context->
1453                                                             fifos[cidx].
1454                                                             pipe = 0;
1455                                         }       /* switch attribute */
1456
1457                                         if (context->fifos[cidx].pipe) {
1458                                                 context->fifos[cidx].
1459                                                     fifonum = cidx;
1460                                                 context->fifos[cidx].hfc =
1461                                                     context;
1462                                                 context->fifos[cidx].usb_packet_maxlen =
1463                                                     le16_to_cpu(ep->desc.wMaxPacketSize);
1464                                                 context->fifos[cidx].
1465                                                     intervall =
1466                                                     ep->desc.bInterval;
1467                                                 context->fifos[cidx].
1468                                                     skbuff = NULL;
1469                                         }
1470                                 }
1471                                 ep++;
1472                         }
1473                         context->dev = dev;     /* save device */
1474                         context->if_used = ifnum;       /* save used interface */
1475                         context->alt_used = alt_used;   /* and alternate config */
1476                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1477                         context->cfg_used = vcf[16];    /* store used config */
1478                         context->vend_idx = vend_idx;   /* store found vendor */
1479                         context->packet_size = packet_size;
1480                         context->iso_packet_size = iso_packet_size;
1481
1482                         /* create the control pipes needed for register access */
1483                         context->ctrl_in_pipe =
1484                             usb_rcvctrlpipe(context->dev, 0);
1485                         context->ctrl_out_pipe =
1486                             usb_sndctrlpipe(context->dev, 0);
1487                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1488
1489                         driver_info =
1490                             (hfcsusb_vdata *) hfcusb_idtab[vend_idx].
1491                             driver_info;
1492                         printk(KERN_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 };
1573
1574 static void __exit
1575 hfc_usb_mod_exit(void)
1576 {
1577         usb_deregister(&hfc_drv); /* release our driver */
1578         printk(KERN_INFO "HFC-S USB: module removed\n");
1579 }
1580
1581 static int __init
1582 hfc_usb_mod_init(void)
1583 {
1584         char revstr[30], datestr[30], dummy[30];
1585 #ifndef CONFIG_HISAX_DEBUG
1586         hfc_debug = debug;
1587 #endif
1588         sscanf(hfcusb_revision,
1589                "%s %s $ %s %s %s $ ", dummy, revstr,
1590                dummy, datestr, dummy);
1591         printk(KERN_INFO
1592                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1593                revstr, datestr, debug);
1594         if (usb_register(&hfc_drv)) {
1595                 printk(KERN_INFO
1596                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1597                 return (-1);    /* unable to register */
1598         }
1599         return (0);
1600 }
1601
1602 module_init(hfc_usb_mod_init);
1603 module_exit(hfc_usb_mod_exit);
1604 MODULE_AUTHOR(DRIVER_AUTHOR);
1605 MODULE_DESCRIPTION(DRIVER_DESC);
1606 MODULE_LICENSE("GPL");
1607 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);