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         urb->dev = dev;
 436         urb->pipe = pipe;
 437         urb->complete = complete;
 438         urb->number_of_packets = num_packets;
 439         urb->transfer_buffer_length = packet_size * num_packets;
 440         urb->context = context;
 441         urb->transfer_buffer = buf;
 442         urb->transfer_flags = URB_ISO_ASAP;
 443         urb->actual_length = 0;
 444         urb->interval = interval;
 445         for (k = 0; k < num_packets; k++) {
 446                 urb->iso_frame_desc[k].offset = packet_size * k;
 447                 urb->iso_frame_desc[k].length = packet_size;
 448                 urb->iso_frame_desc[k].actual_length = 0;
 449         }
 450 }
 451
 452 /* allocs urbs and start isoc transfer with two pending urbs to avoid
 453  * gaps in the transfer chain
 454  */
 455 static int
 456 start_isoc_chain(usb_fifo *fifo, int num_packets_per_urb,
 457                  usb_complete_t complete, int packet_size)
 458 {
 459         int i, k, errcode;
 460
 461         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 462             fifo->fifonum);
 463
 464         /* allocate Memory for Iso out Urbs */
 465         for (i = 0; i < 2; i++) {
 466                 if (!(fifo->iso[i].purb)) {
 467                         fifo->iso[i].purb =
 468                                 usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 469                         if (!(fifo->iso[i].purb)) {
 470                                 printk(KERN_INFO
 471                                        "alloc urb for fifo %i failed!!!",
 472                                        fifo->fifonum);
 473                         }
 474                         fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 475
 476                         /* Init the first iso */
 477                         if (ISO_BUFFER_SIZE >=
 478                             (fifo->usb_packet_maxlen *
 479                              num_packets_per_urb)) {
 480                                 fill_isoc_urb(fifo->iso[i].purb,
 481                                               fifo->hfc->dev, fifo->pipe,
 482                                               fifo->iso[i].buffer,
 483                                               num_packets_per_urb,
 484                                               fifo->usb_packet_maxlen,
 485                                               fifo->intervall, complete,
 486                                               &fifo->iso[i]);
 487                                 memset(fifo->iso[i].buffer, 0,
 488                                        sizeof(fifo->iso[i].buffer));
 489                                 /* defining packet delimeters in fifo->buffer */
 490                                 for (k = 0; k < num_packets_per_urb; k++) {
 491                                         fifo->iso[i].purb->
 492                                                 iso_frame_desc[k].offset =
 493                                                 k * packet_size;
 494                                         fifo->iso[i].purb->
 495                                                 iso_frame_desc[k].length =
 496                                                 packet_size;
 497                                 }
 498                         } else {
 499                                 printk(KERN_INFO
 500                                        "HFC-S USB: ISO Buffer size to small!\n");
 501                         }
 502                 }
 503                 fifo->bit_line = BITLINE_INF;
 504
 505                 errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 506                 fifo->active = (errcode >= 0) ? 1 : 0;
 507                 if (errcode < 0)
 508                         printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 509                                i, errcode, symbolic(urb_errlist, errcode));
 510         }
 511         return (fifo->active);
 512 }
 513
 514 /* stops running iso chain and frees their pending urbs */
 515 static void
 516 stop_isoc_chain(usb_fifo *fifo)
 517 {
 518         int i;
 519
 520         for (i = 0; i < 2; i++) {
 521                 if (fifo->iso[i].purb) {
 522                         DBG(HFCUSB_DBG_INIT,
 523                             "HFC-S USB: Stopping iso chain for fifo %i.%i",
 524                             fifo->fifonum, i);
 525                         usb_kill_urb(fifo->iso[i].purb);
 526                         usb_free_urb(fifo->iso[i].purb);
 527                         fifo->iso[i].purb = NULL;
 528                 }
 529         }
 530
 531         usb_kill_urb(fifo->urb);
 532         usb_free_urb(fifo->urb);
 533         fifo->urb = NULL;
 534         fifo->active = 0;
 535 }
 536
 537 /* defines how much ISO packets are handled in one URB */
 538 static int iso_packets[8] =
 539 { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 540   ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 541 };
 542
 543 static void
 544 tx_iso_complete(struct urb *urb)
 545 {
 546         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 547         usb_fifo *fifo = context_iso_urb->owner_fifo;
 548         hfcusb_data *hfc = fifo->hfc;
 549         int k, tx_offset, num_isoc_packets, sink, len, current_len,
 550                 errcode;
 551         int frame_complete, transp_mode, fifon, status;
 552         __u8 threshbit;
 553
 554         fifon = fifo->fifonum;
 555         status = urb->status;
 556
 557         tx_offset = 0;
 558
 559         /* ISO transfer only partially completed,
 560            look at individual frame status for details */
 561         if (status == -EXDEV) {
 562                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 563                     ", urb->status %d, fifonum %d\n",
 564                     status, fifon);
 565
 566                 for (k = 0; k < iso_packets[fifon]; ++k) {
 567                         errcode = urb->iso_frame_desc[k].status;
 568                         if (errcode)
 569                                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 570                                     "packet %i, status: %i\n",
 571                                     k, errcode);
 572                 }
 573
 574                 // clear status, so go on with ISO transfers
 575                 status = 0;
 576         }
 577
 578         if (fifo->active && !status) {
 579                 transp_mode = 0;
 580                 if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 581                         transp_mode = 1;
 582
 583                 /* is FifoFull-threshold set for our channel? */
 584                 threshbit = (hfc->threshold_mask & (1 << fifon));
 585                 num_isoc_packets = iso_packets[fifon];
 586
 587                 /* predict dataflow to avoid fifo overflow */
 588                 if (fifon >= HFCUSB_D_TX) {
 589                         sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 590                 } else {
 591                         sink = (threshbit) ? SINK_MIN : SINK_MAX;
 592                 }
 593                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 594                               context_iso_urb->buffer, num_isoc_packets,
 595                               fifo->usb_packet_maxlen, fifo->intervall,
 596                               tx_iso_complete, urb->context);
 597                 memset(context_iso_urb->buffer, 0,
 598                        sizeof(context_iso_urb->buffer));
 599                 frame_complete = 0;
 600
 601                 /* Generate next ISO Packets */
 602                 for (k = 0; k < num_isoc_packets; ++k) {
 603                         if (fifo->skbuff) {
 604                                 len = fifo->skbuff->len;
 605                                 /* we lower data margin every msec */
 606                                 fifo->bit_line -= sink;
 607                                 current_len = (0 - fifo->bit_line) / 8;
 608                                 /* maximum 15 byte for every ISO packet makes our life easier */
 609                                 if (current_len > 14)
 610                                         current_len = 14;
 611                                 current_len =
 612                                         (len <=
 613                                          current_len) ? len : current_len;
 614                                 /* how much bit do we put on the line? */
 615                                 fifo->bit_line += current_len * 8;
 616
 617                                 context_iso_urb->buffer[tx_offset] = 0;
 618                                 if (current_len == len) {
 619                                         if (!transp_mode) {
 620                                                 /* here frame completion */
 621                                                 context_iso_urb->
 622                                                         buffer[tx_offset] = 1;
 623                                                 /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 624                                                 fifo->bit_line += 32;
 625                                         }
 626                                         frame_complete = 1;
 627                                 }
 628
 629                                 memcpy(context_iso_urb->buffer +
 630                                        tx_offset + 1, fifo->skbuff->data,
 631                                        current_len);
 632                                 skb_pull(fifo->skbuff, current_len);
 633
 634                                 /* define packet delimeters within the URB buffer */
 635                                 urb->iso_frame_desc[k].offset = tx_offset;
 636                                 urb->iso_frame_desc[k].length =
 637                                         current_len + 1;
 638
 639                                 tx_offset += (current_len + 1);
 640                         } else {
 641                                 urb->iso_frame_desc[k].offset =
 642                                         tx_offset++;
 643
 644                                 urb->iso_frame_desc[k].length = 1;
 645                                 fifo->bit_line -= sink; /* we lower data margin every msec */
 646
 647                                 if (fifo->bit_line < BITLINE_INF) {
 648                                         fifo->bit_line = BITLINE_INF;
 649                                 }
 650                         }
 651
 652                         if (frame_complete) {
 653                                 fifo->delete_flg = 1;
 654                                 fifo->hif->l1l2(fifo->hif,
 655                                                 PH_DATA | CONFIRM,
 656                                                 (void *) (unsigned long) fifo->skbuff->
 657                                                 truesize);
 658                                 if (fifo->skbuff && fifo->delete_flg) {
 659                                         dev_kfree_skb_any(fifo->skbuff);
 660                                         fifo->skbuff = NULL;
 661                                         fifo->delete_flg = 0;
 662                                 }
 663                                 frame_complete = 0;
 664                         }
 665                 }
 666                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 667                 if (errcode < 0) {
 668                         printk(KERN_INFO
 669                                "HFC-S USB: error submitting ISO URB: %d\n",
 670                                errcode);
 671                 }
 672         } else {
 673                 if (status && !hfc->disc_flag) {
 674                         printk(KERN_INFO
 675                                "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 676                                status, symbolic(urb_errlist, status), fifon);
 677                 }
 678         }
 679 }
 680
 681 static void
 682 rx_iso_complete(struct urb *urb)
 683 {
 684         iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 685         usb_fifo *fifo = context_iso_urb->owner_fifo;
 686         hfcusb_data *hfc = fifo->hfc;
 687         int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 688                 status;
 689         unsigned int iso_status;
 690         __u8 *buf;
 691         static __u8 eof[8];
 692
 693         fifon = fifo->fifonum;
 694         status = urb->status;
 695
 696         if (urb->status == -EOVERFLOW) {
 697                 DBG(HFCUSB_DBG_VERBOSE_USB,
 698                     "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 699                 status = 0;
 700         }
 701
 702         /* ISO transfer only partially completed,
 703            look at individual frame status for details */
 704         if (status == -EXDEV) {
 705                 DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 706                     "urb->status %d, fifonum %d\n",
 707                     status, fifon);
 708                 status = 0;
 709         }
 710
 711         if (fifo->active && !status) {
 712                 num_isoc_packets = iso_packets[fifon];
 713                 maxlen = fifo->usb_packet_maxlen;
 714                 for (k = 0; k < num_isoc_packets; ++k) {
 715                         len = urb->iso_frame_desc[k].actual_length;
 716                         offset = urb->iso_frame_desc[k].offset;
 717                         buf = context_iso_urb->buffer + offset;
 718                         iso_status = urb->iso_frame_desc[k].status;
 719
 720                         if (iso_status && !hfc->disc_flag)
 721                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 722                                     "HFC-S USB: rx_iso_complete "
 723                                     "ISO packet %i, status: %i\n",
 724                                     k, iso_status);
 725
 726                         if (fifon == HFCUSB_D_RX) {
 727                                 DBG(HFCUSB_DBG_VERBOSE_USB,
 728                                     "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 729                                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 730                                     fifo->last_urblen, len, maxlen,
 731                                     eof[5]);
 732
 733                                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 734                         }
 735
 736                         if (fifo->last_urblen != maxlen) {
 737                                 /* the threshold mask is in the 2nd status byte */
 738                                 hfc->threshold_mask = buf[1];
 739                                 /* care for L1 state only for D-Channel
 740                                    to avoid overlapped iso completions */
 741                                 if (fifon == HFCUSB_D_RX) {
 742                                         /* the S0 state is in the upper half
 743                                            of the 1st status byte */
 744                                         s0_state_handler(hfc, buf[0] >> 4);
 745                                 }
 746                                 eof[fifon] = buf[0] & 1;
 747                                 if (len > 2)
 748                                         collect_rx_frame(fifo, buf + 2,
 749                                                          len - 2,
 750                                                          (len < maxlen) ?
 751                                                          eof[fifon] : 0);
 752                         } else {
 753                                 collect_rx_frame(fifo, buf, len,
 754                                                  (len <
 755                                                   maxlen) ? eof[fifon] :
 756                                                  0);
 757                         }
 758                         fifo->last_urblen = len;
 759                 }
 760
 761                 fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 762                               context_iso_urb->buffer, num_isoc_packets,
 763                               fifo->usb_packet_maxlen, fifo->intervall,
 764                               rx_iso_complete, urb->context);
 765                 errcode = usb_submit_urb(urb, GFP_ATOMIC);
 766                 if (errcode < 0) {
 767                         printk(KERN_ERR
 768                                "HFC-S USB: error submitting ISO URB: %d\n",
 769                                errcode);
 770                 }
 771         } else {
 772                 if (status && !hfc->disc_flag) {
 773                         printk(KERN_ERR
 774                                "HFC-S USB: rx_iso_complete : "
 775                                "urb->status %d, fifonum %d\n",
 776                                status, fifon);
 777                 }
 778         }
 779 }
 780
 781 /* collect rx data from INT- and ISO-URBs  */
 782 static void
 783 collect_rx_frame(usb_fifo *fifo, __u8 *data, int len, int finish)
 784 {
 785         hfcusb_data *hfc = fifo->hfc;
 786         int transp_mode, fifon;
 787
 788         fifon = fifo->fifonum;
 789         transp_mode = 0;
 790         if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 791                 transp_mode = 1;
 792
 793         if (!fifo->skbuff) {
 794                 fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 795                 if (!fifo->skbuff) {
 796                         printk(KERN_ERR
 797                                "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 798                                fifon);
 799                         return;
 800                 }
 801         }
 802         if (len) {
 803                 if (fifo->skbuff->len + len < fifo->max_size) {
 804                         skb_put_data(fifo->skbuff, data, len);
 805                 } else {
 806                         DBG(HFCUSB_DBG_FIFO_ERR,
 807                             "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 808                             fifo->max_size, fifon);
 809                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 810                         skb_trim(fifo->skbuff, 0);
 811                 }
 812         }
 813         if (transp_mode && fifo->skbuff->len >= 128) {
 814                 fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 815                                 fifo->skbuff);
 816                 fifo->skbuff = NULL;
 817                 return;
 818         }
 819         /* we have a complete hdlc packet */
 820         if (finish) {
 821                 if (fifo->skbuff->len > 3 &&
 822                     !fifo->skbuff->data[fifo->skbuff->len - 1]) {
 823
 824                         if (fifon == HFCUSB_D_RX) {
 825                                 DBG(HFCUSB_DBG_DCHANNEL,
 826                                     "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 827                                 DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 828                         }
 829
 830                         /* remove CRC & status */
 831                         skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 832                         if (fifon == HFCUSB_PCM_RX) {
 833                                 fifo->hif->l1l2(fifo->hif,
 834                                                 PH_DATA_E | INDICATION,
 835                                                 fifo->skbuff);
 836                         } else
 837                                 fifo->hif->l1l2(fifo->hif,
 838                                                 PH_DATA | INDICATION,
 839                                                 fifo->skbuff);
 840                         fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 841                 } else {
 842                         DBG(HFCUSB_DBG_FIFO_ERR,
 843                             "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 844                             fifo->skbuff->len, fifon);
 845                         DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 846                         skb_trim(fifo->skbuff, 0);
 847                 }
 848         }
 849 }
 850
 851 static void
 852 rx_int_complete(struct urb *urb)
 853 {
 854         int len;
 855         int status;
 856         __u8 *buf, maxlen, fifon;
 857         usb_fifo *fifo = (usb_fifo *) urb->context;
 858         hfcusb_data *hfc = fifo->hfc;
 859         static __u8 eof[8];
 860
 861         urb->dev = hfc->dev;    /* security init */
 862
 863         fifon = fifo->fifonum;
 864         if ((!fifo->active) || (urb->status)) {
 865                 DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 866                     fifon, urb->status);
 867
 868                 fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 869                 if (fifo->skbuff) {
 870                         dev_kfree_skb_any(fifo->skbuff);
 871                         fifo->skbuff = NULL;
 872                 }
 873                 return;
 874         }
 875         len = urb->actual_length;
 876         buf = fifo->buffer;
 877         maxlen = fifo->usb_packet_maxlen;
 878
 879         if (fifon == HFCUSB_D_RX) {
 880                 DBG(HFCUSB_DBG_VERBOSE_USB,
 881                     "HFC-S USB: INT-D-RX lst_urblen:%2d "
 882                     "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 883                     fifo->last_urblen, len, maxlen,
 884                     eof[5]);
 885                 DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 886         }
 887
 888         if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 889                 /* the threshold mask is in the 2nd status byte */
 890                 hfc->threshold_mask = buf[1];
 891                 /* the S0 state is in the upper half of the 1st status byte */
 892                 s0_state_handler(hfc, buf[0] >> 4);
 893                 eof[fifon] = buf[0] & 1;
 894                 /* if we have more than the 2 status bytes -> collect data */
 895                 if (len > 2)
 896                         collect_rx_frame(fifo, buf + 2,
 897                                          urb->actual_length - 2,
 898                                          (len < maxlen) ? eof[fifon] : 0);
 899         } else {
 900                 collect_rx_frame(fifo, buf, urb->actual_length,
 901                                  (len < maxlen) ? eof[fifon] : 0);
 902         }
 903         fifo->last_urblen = urb->actual_length;
 904         status = usb_submit_urb(urb, GFP_ATOMIC);
 905         if (status) {
 906                 printk(KERN_INFO
 907                        "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 908                        __func__, fifon);
 909         }
 910 }
 911
 912 /* start initial INT-URB for certain fifo */
 913 static void
 914 start_int_fifo(usb_fifo *fifo)
 915 {
 916         int errcode;
 917
 918         DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 919             fifo->fifonum);
 920
 921         if (!fifo->urb) {
 922                 fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 923                 if (!fifo->urb)
 924                         return;
 925         }
 926         usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 927                          fifo->buffer, fifo->usb_packet_maxlen,
 928                          rx_int_complete, fifo, fifo->intervall);
 929         fifo->active = 1;       /* must be marked active */
 930         errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 931         if (errcode) {
 932                 printk(KERN_ERR "HFC-S USB: submit URB error(%s): status:%i\n",
 933                        __func__, 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: unknown 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;
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         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         timer_setup(&hfc->t3_timer, l1_timer_expire_t3, 0);
1171
1172         /* init the t4 timer */
1173         timer_setup(&hfc->t4_timer, l1_timer_expire_t4, 0);
1174
1175         /* init the background machinery for control requests */
1176         hfc->ctrl_read.bRequestType = 0xc0;
1177         hfc->ctrl_read.bRequest = 1;
1178         hfc->ctrl_read.wLength = cpu_to_le16(1);
1179         hfc->ctrl_write.bRequestType = 0x40;
1180         hfc->ctrl_write.bRequest = 0;
1181         hfc->ctrl_write.wLength = 0;
1182         usb_fill_control_urb(hfc->ctrl_urb,
1183                              hfc->dev,
1184                              hfc->ctrl_out_pipe,
1185                              (u_char *)&hfc->ctrl_write,
1186                              NULL, 0, ctrl_complete, hfc);
1187         /* Init All Fifos */
1188         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1189                 hfc->fifos[i].iso[0].purb = NULL;
1190                 hfc->fifos[i].iso[1].purb = NULL;
1191                 hfc->fifos[i].active = 0;
1192         }
1193         /* register Modul to upper Hisax Layers */
1194         hfc->d_if.owner = THIS_MODULE;
1195         hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1196         hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1197         for (i = 0; i < 2; i++) {
1198                 hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1199                 hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1200                 p_b_if[i] = &hfc->b_if[i];
1201         }
1202         /* default Prot: EURO ISDN, should be a module_param */
1203         hfc->protocol = 2;
1204         i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1205         if (i) {
1206                 printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1207                 return i;
1208         }
1209
1210 #ifdef CONFIG_HISAX_DEBUG
1211         hfc_debug = debug;
1212 #endif
1213
1214         for (i = 0; i < 4; i++)
1215                 hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1216         for (i = 4; i < 8; i++)
1217                 hfc->fifos[i].hif = &hfc->d_if.ifc;
1218
1219         /* 3 (+1) INT IN + 3 ISO OUT */
1220         if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1221                 start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1222                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1223                         start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1224                 start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1225                 start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1226         }
1227         /* 3 (+1) ISO IN + 3 ISO OUT */
1228         if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1229                 start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1230                                  rx_iso_complete, 16);
1231                 if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1232                         start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1233                                          ISOC_PACKETS_D, rx_iso_complete,
1234                                          16);
1235                 start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1236                                  rx_iso_complete, 16);
1237                 start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1238                                  rx_iso_complete, 16);
1239         }
1240
1241         start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1242                          tx_iso_complete, 1);
1243         start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1244                          tx_iso_complete, 1);
1245         start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1246                          tx_iso_complete, 1);
1247
1248         handle_led(hfc, LED_POWER_ON);
1249
1250         return (0);
1251 }
1252
1253 /* initial callback for each plugged USB device */
1254 static int
1255 hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1256 {
1257         struct usb_device *dev = interface_to_usbdev(intf);
1258         hfcusb_data *context;
1259         struct usb_host_interface *iface = intf->cur_altsetting;
1260         struct usb_host_interface *iface_used = NULL;
1261         struct usb_host_endpoint *ep;
1262         int ifnum = iface->desc.bInterfaceNumber;
1263         int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1264                 attr, cfg_found, cidx, ep_addr;
1265         int cmptbl[16], small_match, iso_packet_size, packet_size,
1266                 alt_used = 0;
1267         hfcsusb_vdata *driver_info;
1268
1269         vend_idx = 0xffff;
1270         for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1271                 if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1272                     && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1273                         vend_idx = i;
1274                         continue;
1275                 }
1276         }
1277
1278         printk(KERN_INFO
1279                "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1280                ifnum, iface->desc.bAlternateSetting, intf->minor);
1281
1282         if (vend_idx != 0xffff) {
1283                 /* if vendor and product ID is OK, start probing alternate settings */
1284                 alt_idx = 0;
1285                 small_match = 0xffff;
1286
1287                 /* default settings */
1288                 iso_packet_size = 16;
1289                 packet_size = 64;
1290
1291                 while (alt_idx < intf->num_altsetting) {
1292                         iface = intf->altsetting + alt_idx;
1293                         probe_alt_setting = iface->desc.bAlternateSetting;
1294                         cfg_used = 0;
1295
1296                         /* check for config EOL element */
1297                         while (validconf[cfg_used][0]) {
1298                                 cfg_found = 1;
1299                                 vcf = validconf[cfg_used];
1300                                 /* first endpoint descriptor */
1301                                 ep = iface->endpoint;
1302
1303                                 memcpy(cmptbl, vcf, 16 * sizeof(int));
1304
1305                                 /* check for all endpoints in this alternate setting */
1306                                 for (i = 0; i < iface->desc.bNumEndpoints;
1307                                      i++) {
1308                                         ep_addr =
1309                                                 ep->desc.bEndpointAddress;
1310                                         /* get endpoint base */
1311                                         idx = ((ep_addr & 0x7f) - 1) * 2;
1312                                         if (ep_addr & 0x80)
1313                                                 idx++;
1314                                         attr = ep->desc.bmAttributes;
1315                                         if (cmptbl[idx] == EP_NUL) {
1316                                                 cfg_found = 0;
1317                                         }
1318                                         if (attr == USB_ENDPOINT_XFER_INT
1319                                             && cmptbl[idx] == EP_INT)
1320                                                 cmptbl[idx] = EP_NUL;
1321                                         if (attr == USB_ENDPOINT_XFER_BULK
1322                                             && cmptbl[idx] == EP_BLK)
1323                                                 cmptbl[idx] = EP_NUL;
1324                                         if (attr == USB_ENDPOINT_XFER_ISOC
1325                                             && cmptbl[idx] == EP_ISO)
1326                                                 cmptbl[idx] = EP_NUL;
1327
1328                                         /* check if all INT endpoints match minimum interval */
1329                                         if ((attr == USB_ENDPOINT_XFER_INT)
1330                                             && (ep->desc.bInterval < vcf[17])) {
1331                                                 cfg_found = 0;
1332                                         }
1333                                         ep++;
1334                                 }
1335                                 for (i = 0; i < 16; i++) {
1336                                         /* all entries must be EP_NOP or EP_NUL for a valid config */
1337                                         if (cmptbl[i] != EP_NOP
1338                                             && cmptbl[i] != EP_NUL)
1339                                                 cfg_found = 0;
1340                                 }
1341                                 if (cfg_found) {
1342                                         if (cfg_used < small_match) {
1343                                                 small_match = cfg_used;
1344                                                 alt_used =
1345                                                         probe_alt_setting;
1346                                                 iface_used = iface;
1347                                         }
1348                                 }
1349                                 cfg_used++;
1350                         }
1351                         alt_idx++;
1352                 } /* (alt_idx < intf->num_altsetting) */
1353
1354                 /* found a valid USB Ta Endpint config */
1355                 if (small_match != 0xffff) {
1356                         iface = iface_used;
1357                         if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1358                                 return (-ENOMEM);       /* got no mem */
1359
1360                         ep = iface->endpoint;
1361                         vcf = validconf[small_match];
1362
1363                         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1364                                 ep_addr = ep->desc.bEndpointAddress;
1365                                 /* get endpoint base */
1366                                 idx = ((ep_addr & 0x7f) - 1) * 2;
1367                                 if (ep_addr & 0x80)
1368                                         idx++;
1369                                 cidx = idx & 7;
1370                                 attr = ep->desc.bmAttributes;
1371
1372                                 /* init Endpoints */
1373                                 if (vcf[idx] != EP_NOP
1374                                     && vcf[idx] != EP_NUL) {
1375                                         switch (attr) {
1376                                         case USB_ENDPOINT_XFER_INT:
1377                                                 context->
1378                                                         fifos[cidx].
1379                                                         pipe =
1380                                                         usb_rcvintpipe
1381                                                         (dev,
1382                                                          ep->desc.
1383                                                          bEndpointAddress);
1384                                                 context->
1385                                                         fifos[cidx].
1386                                                         usb_transfer_mode
1387                                                         = USB_INT;
1388                                                 packet_size =
1389                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1390                                                 break;
1391                                         case USB_ENDPOINT_XFER_BULK:
1392                                                 if (ep_addr & 0x80)
1393                                                         context->
1394                                                                 fifos
1395                                                                 [cidx].
1396                                                                 pipe =
1397                                                                 usb_rcvbulkpipe
1398                                                                 (dev,
1399                                                                  ep->
1400                                                                  desc.
1401                                                                  bEndpointAddress);
1402                                                 else
1403                                                         context->
1404                                                                 fifos
1405                                                                 [cidx].
1406                                                                 pipe =
1407                                                                 usb_sndbulkpipe
1408                                                                 (dev,
1409                                                                  ep->
1410                                                                  desc.
1411                                                                  bEndpointAddress);
1412                                                 context->
1413                                                         fifos[cidx].
1414                                                         usb_transfer_mode
1415                                                         = USB_BULK;
1416                                                 packet_size =
1417                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1418                                                 break;
1419                                         case USB_ENDPOINT_XFER_ISOC:
1420                                                 if (ep_addr & 0x80)
1421                                                         context->
1422                                                                 fifos
1423                                                                 [cidx].
1424                                                                 pipe =
1425                                                                 usb_rcvisocpipe
1426                                                                 (dev,
1427                                                                  ep->
1428                                                                  desc.
1429                                                                  bEndpointAddress);
1430                                                 else
1431                                                         context->
1432                                                                 fifos
1433                                                                 [cidx].
1434                                                                 pipe =
1435                                                                 usb_sndisocpipe
1436                                                                 (dev,
1437                                                                  ep->
1438                                                                  desc.
1439                                                                  bEndpointAddress);
1440                                                 context->
1441                                                         fifos[cidx].
1442                                                         usb_transfer_mode
1443                                                         = USB_ISOC;
1444                                                 iso_packet_size =
1445                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1446                                                 break;
1447                                         default:
1448                                                 context->
1449                                                         fifos[cidx].
1450                                                         pipe = 0;
1451                                         }       /* switch attribute */
1452
1453                                         if (context->fifos[cidx].pipe) {
1454                                                 context->fifos[cidx].
1455                                                         fifonum = cidx;
1456                                                 context->fifos[cidx].hfc =
1457                                                         context;
1458                                                 context->fifos[cidx].usb_packet_maxlen =
1459                                                         le16_to_cpu(ep->desc.wMaxPacketSize);
1460                                                 context->fifos[cidx].
1461                                                         intervall =
1462                                                         ep->desc.bInterval;
1463                                                 context->fifos[cidx].
1464                                                         skbuff = NULL;
1465                                         }
1466                                 }
1467                                 ep++;
1468                         }
1469                         context->dev = dev;     /* save device */
1470                         context->if_used = ifnum;       /* save used interface */
1471                         context->alt_used = alt_used;   /* and alternate config */
1472                         context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1473                         context->cfg_used = vcf[16];    /* store used config */
1474                         context->vend_idx = vend_idx;   /* store found vendor */
1475                         context->packet_size = packet_size;
1476                         context->iso_packet_size = iso_packet_size;
1477
1478                         /* create the control pipes needed for register access */
1479                         context->ctrl_in_pipe =
1480                                 usb_rcvctrlpipe(context->dev, 0);
1481                         context->ctrl_out_pipe =
1482                                 usb_sndctrlpipe(context->dev, 0);
1483
1484                         driver_info = (hfcsusb_vdata *)
1485                                       hfcusb_idtab[vend_idx].driver_info;
1486
1487                         context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1488
1489                         if (!context->ctrl_urb) {
1490                                 pr_warn("%s: No memory for control urb\n",
1491                                         driver_info->vend_name);
1492                                 kfree(context);
1493                                 return -ENOMEM;
1494                         }
1495
1496                         pr_info("HFC-S USB: detected \"%s\"\n",
1497                                 driver_info->vend_name);
1498
1499                         DBG(HFCUSB_DBG_INIT,
1500                             "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1501                             conf_str[small_match], context->if_used,
1502                             context->alt_used,
1503                             validconf[small_match][18]);
1504
1505                         /* init the chip and register the driver */
1506                         if (hfc_usb_init(context)) {
1507                                 usb_kill_urb(context->ctrl_urb);
1508                                 usb_free_urb(context->ctrl_urb);
1509                                 context->ctrl_urb = NULL;
1510                                 kfree(context);
1511                                 return (-EIO);
1512                         }
1513                         usb_set_intfdata(intf, context);
1514                         return (0);
1515                 }
1516         } else {
1517                 printk(KERN_INFO
1518                        "HFC-S USB: no valid vendor found in USB descriptor\n");
1519         }
1520         return (-EIO);
1521 }
1522
1523 /* callback for unplugged USB device */
1524 static void
1525 hfc_usb_disconnect(struct usb_interface *intf)
1526 {
1527         hfcusb_data *context = usb_get_intfdata(intf);
1528         int i;
1529
1530         handle_led(context, LED_POWER_OFF);
1531         schedule_timeout(HZ / 100);
1532
1533         printk(KERN_INFO "HFC-S USB: device disconnect\n");
1534         context->disc_flag = 1;
1535         usb_set_intfdata(intf, NULL);
1536
1537         if (timer_pending(&context->t3_timer))
1538                 del_timer(&context->t3_timer);
1539         if (timer_pending(&context->t4_timer))
1540                 del_timer(&context->t4_timer);
1541
1542         /* tell all fifos to terminate */
1543         for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1544                 if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1545                         if (context->fifos[i].active > 0) {
1546                                 stop_isoc_chain(&context->fifos[i]);
1547                                 DBG(HFCUSB_DBG_INIT,
1548                                     "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1549                                     __func__, i);
1550                         }
1551                 } else {
1552                         if (context->fifos[i].active > 0) {
1553                                 context->fifos[i].active = 0;
1554                                 DBG(HFCUSB_DBG_INIT,
1555                                     "HFC-S USB: %s unlinking URB for Fifo(%i)",
1556                                     __func__, i);
1557                         }
1558                         usb_kill_urb(context->fifos[i].urb);
1559                         usb_free_urb(context->fifos[i].urb);
1560                         context->fifos[i].urb = NULL;
1561                 }
1562                 context->fifos[i].active = 0;
1563         }
1564         usb_kill_urb(context->ctrl_urb);
1565         usb_free_urb(context->ctrl_urb);
1566         context->ctrl_urb = NULL;
1567         hisax_unregister(&context->d_if);
1568         kfree(context);         /* free our structure again */
1569 }
1570
1571 static struct usb_driver hfc_drv = {
1572         .name  = "hfc_usb",
1573         .id_table = hfcusb_idtab,
1574         .probe = hfc_usb_probe,
1575         .disconnect = hfc_usb_disconnect,
1576         .disable_hub_initiated_lpm = 1,
1577 };
1578
1579 static void __exit
1580 hfc_usb_mod_exit(void)
1581 {
1582         usb_deregister(&hfc_drv); /* release our driver */
1583         printk(KERN_INFO "HFC-S USB: module removed\n");
1584 }
1585
1586 static int __init
1587 hfc_usb_mod_init(void)
1588 {
1589         char revstr[30], datestr[30], dummy[30];
1590 #ifndef CONFIG_HISAX_DEBUG
1591         hfc_debug = debug;
1592 #endif
1593         sscanf(hfcusb_revision,
1594                "%s %s $ %s %s %s $ ", dummy, revstr,
1595                dummy, datestr, dummy);
1596         printk(KERN_INFO
1597                "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1598                revstr, datestr, debug);
1599         if (usb_register(&hfc_drv)) {
1600                 printk(KERN_INFO
1601                        "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1602                 return (-1);    /* unable to register */
1603         }
1604         return (0);
1605 }
1606
1607 module_init(hfc_usb_mod_init);
1608 module_exit(hfc_usb_mod_exit);
1609 MODULE_AUTHOR(DRIVER_AUTHOR);
1610 MODULE_DESCRIPTION(DRIVER_DESC);
1611 MODULE_LICENSE("GPL");
1612 MODULE_DEVICE_TABLE(usb, hfcusb_idtab);