linux/drivers/isdn/hisax/hfc_usb.c
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   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
  47static 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"
  55static u_int debug;
  56module_param(debug, uint, 0);
  57static int hfc_debug;
  58
  59
  60/* private vendor specific data */
  61typedef 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 */
  68static 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) */
 139struct usb_fifo;                /* forward definition */
 140typedef 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
 146struct hfcusb_data;             /* forward definition */
 147
 148typedef 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 */
 169typedef 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
 209static void collect_rx_frame(usb_fifo *fifo, __u8 *data, int len,
 210                             int finish);
 211
 212static inline const char *
 213symbolic(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
 222static void
 223ctrl_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
 239static int
 240queue_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
 257static void
 258ctrl_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 */
 273static void
 274write_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
 282static void
 283set_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 */
 299static void
 300handle_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 */
 345static void
 346l1_timer_expire_t3(hfcusb_data *hfc)
 347{
 348        hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 349                           NULL);
 350
 351        DBG(HFCUSB_DBG_STATES,
 352            "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 353
 354        hfc->l1_activated = 0;
 355        handle_led(hfc, LED_S0_OFF);
 356        /* deactivate : */
 357        queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
 358        queue_control_request(hfc, HFCUSB_STATES, 3, 1);
 359}
 360
 361/* ISDN l1 timer T4 expires */
 362static void
 363l1_timer_expire_t4(hfcusb_data *hfc)
 364{
 365        hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
 366                           NULL);
 367
 368        DBG(HFCUSB_DBG_STATES,
 369            "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 370
 371        hfc->l1_activated = 0;
 372        handle_led(hfc, LED_S0_OFF);
 373}
 374
 375/* S0 state changed */
 376static void
 377s0_state_handler(hfcusb_data *hfc, __u8 state)
 378{
 379        __u8 old_state;
 380
 381        old_state = hfc->l1_state;
 382        if (state == old_state || state < 1 || state > 8)
 383                return;
 384
 385        DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
 386            old_state, state);
 387
 388        if (state < 4 || state == 7 || state == 8) {
 389                if (timer_pending(&hfc->t3_timer))
 390                        del_timer(&hfc->t3_timer);
 391                DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
 392        }
 393        if (state >= 7) {
 394                if (timer_pending(&hfc->t4_timer))
 395                        del_timer(&hfc->t4_timer);
 396                DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
 397        }
 398
 399        if (state == 7 && !hfc->l1_activated) {
 400                hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 401                                   PH_ACTIVATE | INDICATION, NULL);
 402                DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 403                hfc->l1_activated = 1;
 404                handle_led(hfc, LED_S0_ON);
 405        } else if (state <= 3 /* && activated */) {
 406                if (old_state == 7 || old_state == 8) {
 407                        DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
 408                        if (!timer_pending(&hfc->t4_timer)) {
 409                                hfc->t4_timer.expires =
 410                                        jiffies + (HFC_TIMER_T4 * HZ) / 1000;
 411                                add_timer(&hfc->t4_timer);
 412                        }
 413                } else {
 414                        hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
 415                                           PH_DEACTIVATE | INDICATION,
 416                                           NULL);
 417                        DBG(HFCUSB_DBG_STATES,
 418                            "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 419                        hfc->l1_activated = 0;
 420                        handle_led(hfc, LED_S0_OFF);
 421                }
 422        }
 423        hfc->l1_state = state;
 424}
 425
 426static void
 427fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
 428              void *buf, int num_packets, int packet_size, int interval,
 429              usb_complete_t complete, void *context)
 430{
 431        int k;
 432
 433        urb->dev = dev;
 434        urb->pipe = pipe;
 435        urb->complete = complete;
 436        urb->number_of_packets = num_packets;
 437        urb->transfer_buffer_length = packet_size * num_packets;
 438        urb->context = context;
 439        urb->transfer_buffer = buf;
 440        urb->transfer_flags = URB_ISO_ASAP;
 441        urb->actual_length = 0;
 442        urb->interval = interval;
 443        for (k = 0; k < num_packets; k++) {
 444                urb->iso_frame_desc[k].offset = packet_size * k;
 445                urb->iso_frame_desc[k].length = packet_size;
 446                urb->iso_frame_desc[k].actual_length = 0;
 447        }
 448}
 449
 450/* allocs urbs and start isoc transfer with two pending urbs to avoid
 451 * gaps in the transfer chain
 452 */
 453static int
 454start_isoc_chain(usb_fifo *fifo, int num_packets_per_urb,
 455                 usb_complete_t complete, int packet_size)
 456{
 457        int i, k, errcode;
 458
 459        DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
 460            fifo->fifonum);
 461
 462        /* allocate Memory for Iso out Urbs */
 463        for (i = 0; i < 2; i++) {
 464                if (!(fifo->iso[i].purb)) {
 465                        fifo->iso[i].purb =
 466                                usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
 467                        if (!(fifo->iso[i].purb)) {
 468                                printk(KERN_INFO
 469                                       "alloc urb for fifo %i failed!!!",
 470                                       fifo->fifonum);
 471                        }
 472                        fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;
 473
 474                        /* Init the first iso */
 475                        if (ISO_BUFFER_SIZE >=
 476                            (fifo->usb_packet_maxlen *
 477                             num_packets_per_urb)) {
 478                                fill_isoc_urb(fifo->iso[i].purb,
 479                                              fifo->hfc->dev, fifo->pipe,
 480                                              fifo->iso[i].buffer,
 481                                              num_packets_per_urb,
 482                                              fifo->usb_packet_maxlen,
 483                                              fifo->intervall, complete,
 484                                              &fifo->iso[i]);
 485                                memset(fifo->iso[i].buffer, 0,
 486                                       sizeof(fifo->iso[i].buffer));
 487                                /* defining packet delimeters in fifo->buffer */
 488                                for (k = 0; k < num_packets_per_urb; k++) {
 489                                        fifo->iso[i].purb->
 490                                                iso_frame_desc[k].offset =
 491                                                k * packet_size;
 492                                        fifo->iso[i].purb->
 493                                                iso_frame_desc[k].length =
 494                                                packet_size;
 495                                }
 496                        } else {
 497                                printk(KERN_INFO
 498                                       "HFC-S USB: ISO Buffer size to small!\n");
 499                        }
 500                }
 501                fifo->bit_line = BITLINE_INF;
 502
 503                errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
 504                fifo->active = (errcode >= 0) ? 1 : 0;
 505                if (errcode < 0)
 506                        printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
 507                               i, errcode, symbolic(urb_errlist, errcode));
 508        }
 509        return (fifo->active);
 510}
 511
 512/* stops running iso chain and frees their pending urbs */
 513static void
 514stop_isoc_chain(usb_fifo *fifo)
 515{
 516        int i;
 517
 518        for (i = 0; i < 2; i++) {
 519                if (fifo->iso[i].purb) {
 520                        DBG(HFCUSB_DBG_INIT,
 521                            "HFC-S USB: Stopping iso chain for fifo %i.%i",
 522                            fifo->fifonum, i);
 523                        usb_kill_urb(fifo->iso[i].purb);
 524                        usb_free_urb(fifo->iso[i].purb);
 525                        fifo->iso[i].purb = NULL;
 526                }
 527        }
 528
 529        usb_kill_urb(fifo->urb);
 530        usb_free_urb(fifo->urb);
 531        fifo->urb = NULL;
 532        fifo->active = 0;
 533}
 534
 535/* defines how much ISO packets are handled in one URB */
 536static int iso_packets[8] =
 537{ ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
 538  ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
 539};
 540
 541static void
 542tx_iso_complete(struct urb *urb)
 543{
 544        iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 545        usb_fifo *fifo = context_iso_urb->owner_fifo;
 546        hfcusb_data *hfc = fifo->hfc;
 547        int k, tx_offset, num_isoc_packets, sink, len, current_len,
 548                errcode;
 549        int frame_complete, transp_mode, fifon, status;
 550        __u8 threshbit;
 551
 552        fifon = fifo->fifonum;
 553        status = urb->status;
 554
 555        tx_offset = 0;
 556
 557        /* ISO transfer only partially completed,
 558           look at individual frame status for details */
 559        if (status == -EXDEV) {
 560                DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
 561                    ", urb->status %d, fifonum %d\n",
 562                    status, fifon);
 563
 564                for (k = 0; k < iso_packets[fifon]; ++k) {
 565                        errcode = urb->iso_frame_desc[k].status;
 566                        if (errcode)
 567                                DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
 568                                    "packet %i, status: %i\n",
 569                                    k, errcode);
 570                }
 571
 572                // clear status, so go on with ISO transfers
 573                status = 0;
 574        }
 575
 576        if (fifo->active && !status) {
 577                transp_mode = 0;
 578                if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 579                        transp_mode = 1;
 580
 581                /* is FifoFull-threshold set for our channel? */
 582                threshbit = (hfc->threshold_mask & (1 << fifon));
 583                num_isoc_packets = iso_packets[fifon];
 584
 585                /* predict dataflow to avoid fifo overflow */
 586                if (fifon >= HFCUSB_D_TX) {
 587                        sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
 588                } else {
 589                        sink = (threshbit) ? SINK_MIN : SINK_MAX;
 590                }
 591                fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 592                              context_iso_urb->buffer, num_isoc_packets,
 593                              fifo->usb_packet_maxlen, fifo->intervall,
 594                              tx_iso_complete, urb->context);
 595                memset(context_iso_urb->buffer, 0,
 596                       sizeof(context_iso_urb->buffer));
 597                frame_complete = 0;
 598
 599                /* Generate next ISO Packets */
 600                for (k = 0; k < num_isoc_packets; ++k) {
 601                        if (fifo->skbuff) {
 602                                len = fifo->skbuff->len;
 603                                /* we lower data margin every msec */
 604                                fifo->bit_line -= sink;
 605                                current_len = (0 - fifo->bit_line) / 8;
 606                                /* maximum 15 byte for every ISO packet makes our life easier */
 607                                if (current_len > 14)
 608                                        current_len = 14;
 609                                current_len =
 610                                        (len <=
 611                                         current_len) ? len : current_len;
 612                                /* how much bit do we put on the line? */
 613                                fifo->bit_line += current_len * 8;
 614
 615                                context_iso_urb->buffer[tx_offset] = 0;
 616                                if (current_len == len) {
 617                                        if (!transp_mode) {
 618                                                /* here frame completion */
 619                                                context_iso_urb->
 620                                                        buffer[tx_offset] = 1;
 621                                                /* add 2 byte flags and 16bit CRC at end of ISDN frame */
 622                                                fifo->bit_line += 32;
 623                                        }
 624                                        frame_complete = 1;
 625                                }
 626
 627                                memcpy(context_iso_urb->buffer +
 628                                       tx_offset + 1, fifo->skbuff->data,
 629                                       current_len);
 630                                skb_pull(fifo->skbuff, current_len);
 631
 632                                /* define packet delimeters within the URB buffer */
 633                                urb->iso_frame_desc[k].offset = tx_offset;
 634                                urb->iso_frame_desc[k].length =
 635                                        current_len + 1;
 636
 637                                tx_offset += (current_len + 1);
 638                        } else {
 639                                urb->iso_frame_desc[k].offset =
 640                                        tx_offset++;
 641
 642                                urb->iso_frame_desc[k].length = 1;
 643                                fifo->bit_line -= sink; /* we lower data margin every msec */
 644
 645                                if (fifo->bit_line < BITLINE_INF) {
 646                                        fifo->bit_line = BITLINE_INF;
 647                                }
 648                        }
 649
 650                        if (frame_complete) {
 651                                fifo->delete_flg = 1;
 652                                fifo->hif->l1l2(fifo->hif,
 653                                                PH_DATA | CONFIRM,
 654                                                (void *) (unsigned long) fifo->skbuff->
 655                                                truesize);
 656                                if (fifo->skbuff && fifo->delete_flg) {
 657                                        dev_kfree_skb_any(fifo->skbuff);
 658                                        fifo->skbuff = NULL;
 659                                        fifo->delete_flg = 0;
 660                                }
 661                                frame_complete = 0;
 662                        }
 663                }
 664                errcode = usb_submit_urb(urb, GFP_ATOMIC);
 665                if (errcode < 0) {
 666                        printk(KERN_INFO
 667                               "HFC-S USB: error submitting ISO URB: %d\n",
 668                               errcode);
 669                }
 670        } else {
 671                if (status && !hfc->disc_flag) {
 672                        printk(KERN_INFO
 673                               "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
 674                               status, symbolic(urb_errlist, status), fifon);
 675                }
 676        }
 677}
 678
 679static void
 680rx_iso_complete(struct urb *urb)
 681{
 682        iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 683        usb_fifo *fifo = context_iso_urb->owner_fifo;
 684        hfcusb_data *hfc = fifo->hfc;
 685        int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
 686                status;
 687        unsigned int iso_status;
 688        __u8 *buf;
 689        static __u8 eof[8];
 690
 691        fifon = fifo->fifonum;
 692        status = urb->status;
 693
 694        if (urb->status == -EOVERFLOW) {
 695                DBG(HFCUSB_DBG_VERBOSE_USB,
 696                    "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
 697                status = 0;
 698        }
 699
 700        /* ISO transfer only partially completed,
 701           look at individual frame status for details */
 702        if (status == -EXDEV) {
 703                DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
 704                    "urb->status %d, fifonum %d\n",
 705                    status, fifon);
 706                status = 0;
 707        }
 708
 709        if (fifo->active && !status) {
 710                num_isoc_packets = iso_packets[fifon];
 711                maxlen = fifo->usb_packet_maxlen;
 712                for (k = 0; k < num_isoc_packets; ++k) {
 713                        len = urb->iso_frame_desc[k].actual_length;
 714                        offset = urb->iso_frame_desc[k].offset;
 715                        buf = context_iso_urb->buffer + offset;
 716                        iso_status = urb->iso_frame_desc[k].status;
 717
 718                        if (iso_status && !hfc->disc_flag)
 719                                DBG(HFCUSB_DBG_VERBOSE_USB,
 720                                    "HFC-S USB: rx_iso_complete "
 721                                    "ISO packet %i, status: %i\n",
 722                                    k, iso_status);
 723
 724                        if (fifon == HFCUSB_D_RX) {
 725                                DBG(HFCUSB_DBG_VERBOSE_USB,
 726                                    "HFC-S USB: ISO-D-RX lst_urblen:%2d "
 727                                    "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 728                                    fifo->last_urblen, len, maxlen,
 729                                    eof[5]);
 730
 731                                DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 732                        }
 733
 734                        if (fifo->last_urblen != maxlen) {
 735                                /* the threshold mask is in the 2nd status byte */
 736                                hfc->threshold_mask = buf[1];
 737                                /* care for L1 state only for D-Channel
 738                                   to avoid overlapped iso completions */
 739                                if (fifon == HFCUSB_D_RX) {
 740                                        /* the S0 state is in the upper half
 741                                           of the 1st status byte */
 742                                        s0_state_handler(hfc, buf[0] >> 4);
 743                                }
 744                                eof[fifon] = buf[0] & 1;
 745                                if (len > 2)
 746                                        collect_rx_frame(fifo, buf + 2,
 747                                                         len - 2,
 748                                                         (len < maxlen) ?
 749                                                         eof[fifon] : 0);
 750                        } else {
 751                                collect_rx_frame(fifo, buf, len,
 752                                                 (len <
 753                                                  maxlen) ? eof[fifon] :
 754                                                 0);
 755                        }
 756                        fifo->last_urblen = len;
 757                }
 758
 759                fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
 760                              context_iso_urb->buffer, num_isoc_packets,
 761                              fifo->usb_packet_maxlen, fifo->intervall,
 762                              rx_iso_complete, urb->context);
 763                errcode = usb_submit_urb(urb, GFP_ATOMIC);
 764                if (errcode < 0) {
 765                        printk(KERN_ERR
 766                               "HFC-S USB: error submitting ISO URB: %d\n",
 767                               errcode);
 768                }
 769        } else {
 770                if (status && !hfc->disc_flag) {
 771                        printk(KERN_ERR
 772                               "HFC-S USB: rx_iso_complete : "
 773                               "urb->status %d, fifonum %d\n",
 774                               status, fifon);
 775                }
 776        }
 777}
 778
 779/* collect rx data from INT- and ISO-URBs  */
 780static void
 781collect_rx_frame(usb_fifo *fifo, __u8 *data, int len, int finish)
 782{
 783        hfcusb_data *hfc = fifo->hfc;
 784        int transp_mode, fifon;
 785
 786        fifon = fifo->fifonum;
 787        transp_mode = 0;
 788        if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
 789                transp_mode = 1;
 790
 791        if (!fifo->skbuff) {
 792                fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
 793                if (!fifo->skbuff) {
 794                        printk(KERN_ERR
 795                               "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
 796                               fifon);
 797                        return;
 798                }
 799        }
 800        if (len) {
 801                if (fifo->skbuff->len + len < fifo->max_size) {
 802                        memcpy(skb_put(fifo->skbuff, len), data, len);
 803                } else {
 804                        DBG(HFCUSB_DBG_FIFO_ERR,
 805                            "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
 806                            fifo->max_size, fifon);
 807                        DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 808                        skb_trim(fifo->skbuff, 0);
 809                }
 810        }
 811        if (transp_mode && fifo->skbuff->len >= 128) {
 812                fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
 813                                fifo->skbuff);
 814                fifo->skbuff = NULL;
 815                return;
 816        }
 817        /* we have a complete hdlc packet */
 818        if (finish) {
 819                if (fifo->skbuff->len > 3 &&
 820                    !fifo->skbuff->data[fifo->skbuff->len - 1]) {
 821
 822                        if (fifon == HFCUSB_D_RX) {
 823                                DBG(HFCUSB_DBG_DCHANNEL,
 824                                    "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
 825                                DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
 826                        }
 827
 828                        /* remove CRC & status */
 829                        skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
 830                        if (fifon == HFCUSB_PCM_RX) {
 831                                fifo->hif->l1l2(fifo->hif,
 832                                                PH_DATA_E | INDICATION,
 833                                                fifo->skbuff);
 834                        } else
 835                                fifo->hif->l1l2(fifo->hif,
 836                                                PH_DATA | INDICATION,
 837                                                fifo->skbuff);
 838                        fifo->skbuff = NULL;    /* buffer was freed from upper layer */
 839                } else {
 840                        DBG(HFCUSB_DBG_FIFO_ERR,
 841                            "HFC-S USB: ERROR frame len(%d) fifo(%d)",
 842                            fifo->skbuff->len, fifon);
 843                        DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
 844                        skb_trim(fifo->skbuff, 0);
 845                }
 846        }
 847}
 848
 849static void
 850rx_int_complete(struct urb *urb)
 851{
 852        int len;
 853        int status;
 854        __u8 *buf, maxlen, fifon;
 855        usb_fifo *fifo = (usb_fifo *) urb->context;
 856        hfcusb_data *hfc = fifo->hfc;
 857        static __u8 eof[8];
 858
 859        urb->dev = hfc->dev;    /* security init */
 860
 861        fifon = fifo->fifonum;
 862        if ((!fifo->active) || (urb->status)) {
 863                DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
 864                    fifon, urb->status);
 865
 866                fifo->urb->interval = 0;        /* cancel automatic rescheduling */
 867                if (fifo->skbuff) {
 868                        dev_kfree_skb_any(fifo->skbuff);
 869                        fifo->skbuff = NULL;
 870                }
 871                return;
 872        }
 873        len = urb->actual_length;
 874        buf = fifo->buffer;
 875        maxlen = fifo->usb_packet_maxlen;
 876
 877        if (fifon == HFCUSB_D_RX) {
 878                DBG(HFCUSB_DBG_VERBOSE_USB,
 879                    "HFC-S USB: INT-D-RX lst_urblen:%2d "
 880                    "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
 881                    fifo->last_urblen, len, maxlen,
 882                    eof[5]);
 883                DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
 884        }
 885
 886        if (fifo->last_urblen != fifo->usb_packet_maxlen) {
 887                /* the threshold mask is in the 2nd status byte */
 888                hfc->threshold_mask = buf[1];
 889                /* the S0 state is in the upper half of the 1st status byte */
 890                s0_state_handler(hfc, buf[0] >> 4);
 891                eof[fifon] = buf[0] & 1;
 892                /* if we have more than the 2 status bytes -> collect data */
 893                if (len > 2)
 894                        collect_rx_frame(fifo, buf + 2,
 895                                         urb->actual_length - 2,
 896                                         (len < maxlen) ? eof[fifon] : 0);
 897        } else {
 898                collect_rx_frame(fifo, buf, urb->actual_length,
 899                                 (len < maxlen) ? eof[fifon] : 0);
 900        }
 901        fifo->last_urblen = urb->actual_length;
 902        status = usb_submit_urb(urb, GFP_ATOMIC);
 903        if (status) {
 904                printk(KERN_INFO
 905                       "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
 906                       __func__, fifon);
 907        }
 908}
 909
 910/* start initial INT-URB for certain fifo */
 911static void
 912start_int_fifo(usb_fifo *fifo)
 913{
 914        int errcode;
 915
 916        DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
 917            fifo->fifonum);
 918
 919        if (!fifo->urb) {
 920                fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
 921                if (!fifo->urb)
 922                        return;
 923        }
 924        usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
 925                         fifo->buffer, fifo->usb_packet_maxlen,
 926                         rx_int_complete, fifo, fifo->intervall);
 927        fifo->active = 1;       /* must be marked active */
 928        errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
 929        if (errcode) {
 930                printk(KERN_ERR
 931                       "HFC-S USB: submit URB error(start_int_info): status:%i\n",
 932                       errcode);
 933                fifo->active = 0;
 934                fifo->skbuff = NULL;
 935        }
 936}
 937
 938static void
 939setup_bchannel(hfcusb_data *hfc, int channel, int mode)
 940{
 941        __u8 val, idx_table[2] = { 0, 2 };
 942
 943        if (hfc->disc_flag) {
 944                return;
 945        }
 946        DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
 947            channel, mode);
 948        hfc->b_mode[channel] = mode;
 949
 950        /* setup CON_HDLC */
 951        val = 0;
 952        if (mode != L1_MODE_NULL)
 953                val = 8;        /* enable fifo? */
 954        if (mode == L1_MODE_TRANS)
 955                val |= 2;       /* set transparent bit */
 956
 957        /* set FIFO to transmit register */
 958        queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
 959        queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 960        /* reset fifo */
 961        queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 962        /* set FIFO to receive register */
 963        queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
 964        queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
 965        /* reset fifo */
 966        queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
 967
 968        val = 0x40;
 969        if (hfc->b_mode[0])
 970                val |= 1;
 971        if (hfc->b_mode[1])
 972                val |= 2;
 973        queue_control_request(hfc, HFCUSB_SCTRL, val, 1);
 974
 975        val = 0;
 976        if (hfc->b_mode[0])
 977                val |= 1;
 978        if (hfc->b_mode[1])
 979                val |= 2;
 980        queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);
 981
 982        if (mode == L1_MODE_NULL) {
 983                if (channel)
 984                        handle_led(hfc, LED_B2_OFF);
 985                else
 986                        handle_led(hfc, LED_B1_OFF);
 987        } else {
 988                if (channel)
 989                        handle_led(hfc, LED_B2_ON);
 990                else
 991                        handle_led(hfc, LED_B1_ON);
 992        }
 993}
 994
 995static void
 996hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
 997{
 998        usb_fifo *fifo = my_hisax_if->priv;
 999        hfcusb_data *hfc = fifo->hfc;
1000
1001        switch (pr) {
1002        case PH_ACTIVATE | REQUEST:
1003                if (fifo->fifonum == HFCUSB_D_TX) {
1004                        DBG(HFCUSB_DBG_STATES,
1005                            "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");
1006
1007                        if (hfc->l1_state != 3
1008                            && hfc->l1_state != 7) {
1009                                hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
1010                                                   PH_DEACTIVATE |
1011                                                   INDICATION,
1012                                                   NULL);
1013                                DBG(HFCUSB_DBG_STATES,
1014                                    "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
1015                        } else {
1016                                if (hfc->l1_state == 7) {       /* l1 already active */
1017                                        hfc->d_if.ifc.l1l2(&hfc->
1018                                                           d_if.
1019                                                           ifc,
1020                                                           PH_ACTIVATE
1021                                                           |
1022                                                           INDICATION,
1023                                                           NULL);
1024                                        DBG(HFCUSB_DBG_STATES,
1025                                            "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
1026                                } else {
1027                                        /* force sending sending INFO1 */
1028                                        queue_control_request(hfc,
1029                                                              HFCUSB_STATES,
1030                                                              0x14,
1031                                                              1);
1032                                        mdelay(1);
1033                                        /* start l1 activation */
1034                                        queue_control_request(hfc,
1035                                                              HFCUSB_STATES,
1036                                                              0x04,
1037                                                              1);
1038                                        if (!timer_pending
1039                                            (&hfc->t3_timer)) {
1040                                                hfc->t3_timer.
1041                                                        expires =
1042                                                        jiffies +
1043                                                        (HFC_TIMER_T3 *
1044                                                         HZ) / 1000;
1045                                                add_timer(&hfc->
1046                                                          t3_timer);
1047                                        }
1048                                }
1049                        }
1050                } else {
1051                        DBG(HFCUSB_DBG_STATES,
1052                            "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
1053                        setup_bchannel(hfc,
1054                                       (fifo->fifonum ==
1055                                        HFCUSB_B1_TX) ? 0 : 1,
1056                                       (long) arg);
1057                        fifo->hif->l1l2(fifo->hif,
1058                                        PH_ACTIVATE | INDICATION,
1059                                        NULL);
1060                }
1061                break;
1062        case PH_DEACTIVATE | REQUEST:
1063                if (fifo->fifonum == HFCUSB_D_TX) {
1064                        DBG(HFCUSB_DBG_STATES,
1065                            "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
1066                } else {
1067                        DBG(HFCUSB_DBG_STATES,
1068                            "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
1069                        setup_bchannel(hfc,
1070                                       (fifo->fifonum ==
1071                                        HFCUSB_B1_TX) ? 0 : 1,
1072                                       (int) L1_MODE_NULL);
1073                        fifo->hif->l1l2(fifo->hif,
1074                                        PH_DEACTIVATE | INDICATION,
1075                                        NULL);
1076                }
1077                break;
1078        case PH_DATA | REQUEST:
1079                if (fifo->skbuff && fifo->delete_flg) {
1080                        dev_kfree_skb_any(fifo->skbuff);
1081                        fifo->skbuff = NULL;
1082                        fifo->delete_flg = 0;
1083                }
1084                fifo->skbuff = arg;     /* we have a new buffer */
1085                break;
1086        default:
1087                DBG(HFCUSB_DBG_STATES,
1088                    "HFC_USB: hfc_usb_d_l2l1: unknown state : %#x", pr);
1089                break;
1090        }
1091}
1092
1093/* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
1094static int
1095hfc_usb_init(hfcusb_data *hfc)
1096{
1097        usb_fifo *fifo;
1098        int i;
1099        u_char b;
1100        struct hisax_b_if *p_b_if[2];
1101
1102        /* check the chip id */
1103        if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
1104                printk(KERN_INFO "HFC-USB: cannot read chip id\n");
1105                return (1);
1106        }
1107        if (b != HFCUSB_CHIPID) {
1108                printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
1109                return (1);
1110        }
1111
1112        /* first set the needed config, interface and alternate */
1113        usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
1114
1115        /* do Chip reset */
1116        write_usb(hfc, HFCUSB_CIRM, 8);
1117        /* aux = output, reset off */
1118        write_usb(hfc, HFCUSB_CIRM, 0x10);
1119
1120        /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
1121        write_usb(hfc, HFCUSB_USB_SIZE,
1122                  (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));
1123
1124        /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
1125        write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);
1126
1127        /* enable PCM/GCI master mode */
1128        write_usb(hfc, HFCUSB_MST_MODE1, 0);    /* set default values */
1129        write_usb(hfc, HFCUSB_MST_MODE0, 1);    /* enable master mode */
1130
1131        /* init the fifos */
1132        write_usb(hfc, HFCUSB_F_THRES,
1133                  (HFCUSB_TX_THRESHOLD /
1134                   8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));
1135
1136        fifo = hfc->fifos;
1137        for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1138                write_usb(hfc, HFCUSB_FIFO, i); /* select the desired fifo */
1139                fifo[i].skbuff = NULL;  /* init buffer pointer */
1140                fifo[i].max_size =
1141                        (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
1142                fifo[i].last_urblen = 0;
1143                /* set 2 bit for D- & E-channel */
1144                write_usb(hfc, HFCUSB_HDLC_PAR,
1145                          ((i <= HFCUSB_B2_RX) ? 0 : 2));
1146                /* rx hdlc, enable IFF for D-channel */
1147                write_usb(hfc, HFCUSB_CON_HDLC,
1148                          ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
1149                write_usb(hfc, HFCUSB_INC_RES_F, 2);    /* reset the fifo */
1150        }
1151
1152        write_usb(hfc, HFCUSB_CLKDEL, 0x0f);    /* clock delay value */
1153        write_usb(hfc, HFCUSB_STATES, 3 | 0x10);        /* set deactivated mode */
1154        write_usb(hfc, HFCUSB_STATES, 3);       /* enable state machine */
1155
1156        write_usb(hfc, HFCUSB_SCTRL_R, 0);      /* disable both B receivers */
1157        write_usb(hfc, HFCUSB_SCTRL, 0x40);     /* disable B transmitters + capacitive mode */
1158
1159        /* set both B-channel to not connected */
1160        hfc->b_mode[0] = L1_MODE_NULL;
1161        hfc->b_mode[1] = L1_MODE_NULL;
1162
1163        hfc->l1_activated = 0;
1164        hfc->disc_flag = 0;
1165        hfc->led_state = 0;
1166        hfc->old_led_state = 0;
1167
1168        /* init the t3 timer */
1169        init_timer(&hfc->t3_timer);
1170        hfc->t3_timer.data = (long) hfc;
1171        hfc->t3_timer.function = (void *) l1_timer_expire_t3;
1172
1173        /* init the t4 timer */
1174        init_timer(&hfc->t4_timer);
1175        hfc->t4_timer.data = (long) hfc;
1176        hfc->t4_timer.function = (void *) l1_timer_expire_t4;
1177
1178        /* init the background machinery for control requests */
1179        hfc->ctrl_read.bRequestType = 0xc0;
1180        hfc->ctrl_read.bRequest = 1;
1181        hfc->ctrl_read.wLength = cpu_to_le16(1);
1182        hfc->ctrl_write.bRequestType = 0x40;
1183        hfc->ctrl_write.bRequest = 0;
1184        hfc->ctrl_write.wLength = 0;
1185        usb_fill_control_urb(hfc->ctrl_urb,
1186                             hfc->dev,
1187                             hfc->ctrl_out_pipe,
1188                             (u_char *)&hfc->ctrl_write,
1189                             NULL, 0, ctrl_complete, hfc);
1190        /* Init All Fifos */
1191        for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1192                hfc->fifos[i].iso[0].purb = NULL;
1193                hfc->fifos[i].iso[1].purb = NULL;
1194                hfc->fifos[i].active = 0;
1195        }
1196        /* register Modul to upper Hisax Layers */
1197        hfc->d_if.owner = THIS_MODULE;
1198        hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
1199        hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
1200        for (i = 0; i < 2; i++) {
1201                hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
1202                hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
1203                p_b_if[i] = &hfc->b_if[i];
1204        }
1205        /* default Prot: EURO ISDN, should be a module_param */
1206        hfc->protocol = 2;
1207        i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
1208        if (i) {
1209                printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
1210                return i;
1211        }
1212
1213#ifdef CONFIG_HISAX_DEBUG
1214        hfc_debug = debug;
1215#endif
1216
1217        for (i = 0; i < 4; i++)
1218                hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
1219        for (i = 4; i < 8; i++)
1220                hfc->fifos[i].hif = &hfc->d_if.ifc;
1221
1222        /* 3 (+1) INT IN + 3 ISO OUT */
1223        if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
1224                start_int_fifo(hfc->fifos + HFCUSB_D_RX);
1225                if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1226                        start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
1227                start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
1228                start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
1229        }
1230        /* 3 (+1) ISO IN + 3 ISO OUT */
1231        if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
1232                start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
1233                                 rx_iso_complete, 16);
1234                if (hfc->fifos[HFCUSB_PCM_RX].pipe)
1235                        start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
1236                                         ISOC_PACKETS_D, rx_iso_complete,
1237                                         16);
1238                start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
1239                                 rx_iso_complete, 16);
1240                start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
1241                                 rx_iso_complete, 16);
1242        }
1243
1244        start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
1245                         tx_iso_complete, 1);
1246        start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
1247                         tx_iso_complete, 1);
1248        start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
1249                         tx_iso_complete, 1);
1250
1251        handle_led(hfc, LED_POWER_ON);
1252
1253        return (0);
1254}
1255
1256/* initial callback for each plugged USB device */
1257static int
1258hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1259{
1260        struct usb_device *dev = interface_to_usbdev(intf);
1261        hfcusb_data *context;
1262        struct usb_host_interface *iface = intf->cur_altsetting;
1263        struct usb_host_interface *iface_used = NULL;
1264        struct usb_host_endpoint *ep;
1265        int ifnum = iface->desc.bInterfaceNumber;
1266        int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
1267                attr, cfg_found, cidx, ep_addr;
1268        int cmptbl[16], small_match, iso_packet_size, packet_size,
1269                alt_used = 0;
1270        hfcsusb_vdata *driver_info;
1271
1272        vend_idx = 0xffff;
1273        for (i = 0; hfcusb_idtab[i].idVendor; i++) {
1274                if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
1275                    && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
1276                        vend_idx = i;
1277                        continue;
1278                }
1279        }
1280
1281        printk(KERN_INFO
1282               "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
1283               ifnum, iface->desc.bAlternateSetting, intf->minor);
1284
1285        if (vend_idx != 0xffff) {
1286                /* if vendor and product ID is OK, start probing alternate settings */
1287                alt_idx = 0;
1288                small_match = 0xffff;
1289
1290                /* default settings */
1291                iso_packet_size = 16;
1292                packet_size = 64;
1293
1294                while (alt_idx < intf->num_altsetting) {
1295                        iface = intf->altsetting + alt_idx;
1296                        probe_alt_setting = iface->desc.bAlternateSetting;
1297                        cfg_used = 0;
1298
1299                        /* check for config EOL element */
1300                        while (validconf[cfg_used][0]) {
1301                                cfg_found = 1;
1302                                vcf = validconf[cfg_used];
1303                                /* first endpoint descriptor */
1304                                ep = iface->endpoint;
1305
1306                                memcpy(cmptbl, vcf, 16 * sizeof(int));
1307
1308                                /* check for all endpoints in this alternate setting */
1309                                for (i = 0; i < iface->desc.bNumEndpoints;
1310                                     i++) {
1311                                        ep_addr =
1312                                                ep->desc.bEndpointAddress;
1313                                        /* get endpoint base */
1314                                        idx = ((ep_addr & 0x7f) - 1) * 2;
1315                                        if (ep_addr & 0x80)
1316                                                idx++;
1317                                        attr = ep->desc.bmAttributes;
1318                                        if (cmptbl[idx] == EP_NUL) {
1319                                                cfg_found = 0;
1320                                        }
1321                                        if (attr == USB_ENDPOINT_XFER_INT
1322                                            && cmptbl[idx] == EP_INT)
1323                                                cmptbl[idx] = EP_NUL;
1324                                        if (attr == USB_ENDPOINT_XFER_BULK
1325                                            && cmptbl[idx] == EP_BLK)
1326                                                cmptbl[idx] = EP_NUL;
1327                                        if (attr == USB_ENDPOINT_XFER_ISOC
1328                                            && cmptbl[idx] == EP_ISO)
1329                                                cmptbl[idx] = EP_NUL;
1330
1331                                        /* check if all INT endpoints match minimum interval */
1332                                        if ((attr == USB_ENDPOINT_XFER_INT)
1333                                            && (ep->desc.bInterval < vcf[17])) {
1334                                                cfg_found = 0;
1335                                        }
1336                                        ep++;
1337                                }
1338                                for (i = 0; i < 16; i++) {
1339                                        /* all entries must be EP_NOP or EP_NUL for a valid config */
1340                                        if (cmptbl[i] != EP_NOP
1341                                            && cmptbl[i] != EP_NUL)
1342                                                cfg_found = 0;
1343                                }
1344                                if (cfg_found) {
1345                                        if (cfg_used < small_match) {
1346                                                small_match = cfg_used;
1347                                                alt_used =
1348                                                        probe_alt_setting;
1349                                                iface_used = iface;
1350                                        }
1351                                }
1352                                cfg_used++;
1353                        }
1354                        alt_idx++;
1355                } /* (alt_idx < intf->num_altsetting) */
1356
1357                /* found a valid USB Ta Endpint config */
1358                if (small_match != 0xffff) {
1359                        iface = iface_used;
1360                        if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
1361                                return (-ENOMEM);       /* got no mem */
1362
1363                        ep = iface->endpoint;
1364                        vcf = validconf[small_match];
1365
1366                        for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1367                                ep_addr = ep->desc.bEndpointAddress;
1368                                /* get endpoint base */
1369                                idx = ((ep_addr & 0x7f) - 1) * 2;
1370                                if (ep_addr & 0x80)
1371                                        idx++;
1372                                cidx = idx & 7;
1373                                attr = ep->desc.bmAttributes;
1374
1375                                /* init Endpoints */
1376                                if (vcf[idx] != EP_NOP
1377                                    && vcf[idx] != EP_NUL) {
1378                                        switch (attr) {
1379                                        case USB_ENDPOINT_XFER_INT:
1380                                                context->
1381                                                        fifos[cidx].
1382                                                        pipe =
1383                                                        usb_rcvintpipe
1384                                                        (dev,
1385                                                         ep->desc.
1386                                                         bEndpointAddress);
1387                                                context->
1388                                                        fifos[cidx].
1389                                                        usb_transfer_mode
1390                                                        = USB_INT;
1391                                                packet_size =
1392                                                        le16_to_cpu(ep->desc.wMaxPacketSize);
1393                                                break;
1394                                        case USB_ENDPOINT_XFER_BULK:
1395                                                if (ep_addr & 0x80)
1396                                                        context->
1397                                                                fifos
1398                                                                [cidx].
1399                                                                pipe =
1400                                                                usb_rcvbulkpipe
1401                                                                (dev,
1402                                                                 ep->
1403                                                                 desc.
1404                                                                 bEndpointAddress);
1405                                                else
1406                                                        context->
1407                                                                fifos
1408                                                                [cidx].
1409                                                                pipe =
1410                                                                usb_sndbulkpipe
1411                                                                (dev,
1412                                                                 ep->
1413                                                                 desc.
1414                                                                 bEndpointAddress);
1415                                                context->
1416                                                        fifos[cidx].
1417                                                        usb_transfer_mode
1418                                                        = USB_BULK;
1419                                                packet_size =
1420                                                        le16_to_cpu(ep->desc.wMaxPacketSize);
1421                                                break;
1422                                        case USB_ENDPOINT_XFER_ISOC:
1423                                                if (ep_addr & 0x80)
1424                                                        context->
1425                                                                fifos
1426                                                                [cidx].
1427                                                                pipe =
1428                                                                usb_rcvisocpipe
1429                                                                (dev,
1430                                                                 ep->
1431                                                                 desc.
1432                                                                 bEndpointAddress);
1433                                                else
1434                                                        context->
1435                                                                fifos
1436                                                                [cidx].
1437                                                                pipe =
1438                                                                usb_sndisocpipe
1439                                                                (dev,
1440                                                                 ep->
1441                                                                 desc.
1442                                                                 bEndpointAddress);
1443                                                context->
1444                                                        fifos[cidx].
1445                                                        usb_transfer_mode
1446                                                        = USB_ISOC;
1447                                                iso_packet_size =
1448                                                        le16_to_cpu(ep->desc.wMaxPacketSize);
1449                                                break;
1450                                        default:
1451                                                context->
1452                                                        fifos[cidx].
1453                                                        pipe = 0;
1454                                        }       /* switch attribute */
1455
1456                                        if (context->fifos[cidx].pipe) {
1457                                                context->fifos[cidx].
1458                                                        fifonum = cidx;
1459                                                context->fifos[cidx].hfc =
1460                                                        context;
1461                                                context->fifos[cidx].usb_packet_maxlen =
1462                                                        le16_to_cpu(ep->desc.wMaxPacketSize);
1463                                                context->fifos[cidx].
1464                                                        intervall =
1465                                                        ep->desc.bInterval;
1466                                                context->fifos[cidx].
1467                                                        skbuff = NULL;
1468                                        }
1469                                }
1470                                ep++;
1471                        }
1472                        context->dev = dev;     /* save device */
1473                        context->if_used = ifnum;       /* save used interface */
1474                        context->alt_used = alt_used;   /* and alternate config */
1475                        context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;        /* control size */
1476                        context->cfg_used = vcf[16];    /* store used config */
1477                        context->vend_idx = vend_idx;   /* store found vendor */
1478                        context->packet_size = packet_size;
1479                        context->iso_packet_size = iso_packet_size;
1480
1481                        /* create the control pipes needed for register access */
1482                        context->ctrl_in_pipe =
1483                                usb_rcvctrlpipe(context->dev, 0);
1484                        context->ctrl_out_pipe =
1485                                usb_sndctrlpipe(context->dev, 0);
1486
1487                        driver_info = (hfcsusb_vdata *)
1488                                      hfcusb_idtab[vend_idx].driver_info;
1489
1490                        context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1491
1492                        if (!context->ctrl_urb) {
1493                                pr_warn("%s: No memory for control urb\n",
1494                                        driver_info->vend_name);
1495                                kfree(context);
1496                                return -ENOMEM;
1497                        }
1498
1499                        pr_info("HFC-S USB: detected \"%s\"\n",
1500                                driver_info->vend_name);
1501
1502                        DBG(HFCUSB_DBG_INIT,
1503                            "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
1504                            conf_str[small_match], context->if_used,
1505                            context->alt_used,
1506                            validconf[small_match][18]);
1507
1508                        /* init the chip and register the driver */
1509                        if (hfc_usb_init(context)) {
1510                                usb_kill_urb(context->ctrl_urb);
1511                                usb_free_urb(context->ctrl_urb);
1512                                context->ctrl_urb = NULL;
1513                                kfree(context);
1514                                return (-EIO);
1515                        }
1516                        usb_set_intfdata(intf, context);
1517                        return (0);
1518                }
1519        } else {
1520                printk(KERN_INFO
1521                       "HFC-S USB: no valid vendor found in USB descriptor\n");
1522        }
1523        return (-EIO);
1524}
1525
1526/* callback for unplugged USB device */
1527static void
1528hfc_usb_disconnect(struct usb_interface *intf)
1529{
1530        hfcusb_data *context = usb_get_intfdata(intf);
1531        int i;
1532
1533        handle_led(context, LED_POWER_OFF);
1534        schedule_timeout(HZ / 100);
1535
1536        printk(KERN_INFO "HFC-S USB: device disconnect\n");
1537        context->disc_flag = 1;
1538        usb_set_intfdata(intf, NULL);
1539
1540        if (timer_pending(&context->t3_timer))
1541                del_timer(&context->t3_timer);
1542        if (timer_pending(&context->t4_timer))
1543                del_timer(&context->t4_timer);
1544
1545        /* tell all fifos to terminate */
1546        for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
1547                if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
1548                        if (context->fifos[i].active > 0) {
1549                                stop_isoc_chain(&context->fifos[i]);
1550                                DBG(HFCUSB_DBG_INIT,
1551                                    "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
1552                                    __func__, i);
1553                        }
1554                } else {
1555                        if (context->fifos[i].active > 0) {
1556                                context->fifos[i].active = 0;
1557                                DBG(HFCUSB_DBG_INIT,
1558                                    "HFC-S USB: %s unlinking URB for Fifo(%i)",
1559                                    __func__, i);
1560                        }
1561                        usb_kill_urb(context->fifos[i].urb);
1562                        usb_free_urb(context->fifos[i].urb);
1563                        context->fifos[i].urb = NULL;
1564                }
1565                context->fifos[i].active = 0;
1566        }
1567        usb_kill_urb(context->ctrl_urb);
1568        usb_free_urb(context->ctrl_urb);
1569        context->ctrl_urb = NULL;
1570        hisax_unregister(&context->d_if);
1571        kfree(context);         /* free our structure again */
1572}
1573
1574static struct usb_driver hfc_drv = {
1575        .name  = "hfc_usb",
1576        .id_table = hfcusb_idtab,
1577        .probe = hfc_usb_probe,
1578        .disconnect = hfc_usb_disconnect,
1579        .disable_hub_initiated_lpm = 1,
1580};
1581
1582static void __exit
1583hfc_usb_mod_exit(void)
1584{
1585        usb_deregister(&hfc_drv); /* release our driver */
1586        printk(KERN_INFO "HFC-S USB: module removed\n");
1587}
1588
1589static int __init
1590hfc_usb_mod_init(void)
1591{
1592        char revstr[30], datestr[30], dummy[30];
1593#ifndef CONFIG_HISAX_DEBUG
1594        hfc_debug = debug;
1595#endif
1596        sscanf(hfcusb_revision,
1597               "%s %s $ %s %s %s $ ", dummy, revstr,
1598               dummy, datestr, dummy);
1599        printk(KERN_INFO
1600               "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
1601               revstr, datestr, debug);
1602        if (usb_register(&hfc_drv)) {
1603                printk(KERN_INFO
1604                       "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
1605                return (-1);    /* unable to register */
1606        }
1607        return (0);
1608}
1609
1610module_init(hfc_usb_mod_init);
1611module_exit(hfc_usb_mod_exit);
1612MODULE_AUTHOR(DRIVER_AUTHOR);
1613MODULE_DESCRIPTION(DRIVER_DESC);
1614MODULE_LICENSE("GPL");
1615MODULE_DEVICE_TABLE(usb, hfcusb_idtab);
1616