Logo Search packages:      
Sourcecode: linux version File versions  Download package

hfc_usb.c

/*
 * hfc_usb.c
 *
 * $Id: hfc_usb.c,v 2.3.2.24 2007/10/14 08:40:29 mbachem Exp $
 *
 * modular HiSax ISDN driver for Colognechip HFC-S USB chip
 *
 * Authors : Peter Sprenger (sprenger@moving-bytes.de)
 *           Martin Bachem (m.bachem@gmx.de, info@colognechip.com)
 *
 *           based on the first hfc_usb driver of
 *           Werner Cornelius (werner@isdn-development.de)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * See Version Histroy at the bottom of this file
 *
*/

#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel_stat.h>
#include <linux/usb.h>
#include <linux/kernel.h>
#include <linux/smp_lock.h>
#include <linux/sched.h>
#include <linux/moduleparam.h>
#include "hisax.h"
#include "hisax_if.h"
#include "hfc_usb.h"

static const char *hfcusb_revision =
    "$Revision: 2.3.2.24 $ $Date: 2007/10/14 08:40:29 $ ";

/* Hisax debug support
*  debug flags defined in hfc_usb.h as HFCUSB_DBG_[*]
*/
#define __debug_variable hfc_debug
#include "hisax_debug.h"
static u_int debug;
module_param(debug, uint, 0);
static int hfc_debug;


/* private vendor specific data */
typedef struct {
      __u8 led_scheme;  // led display scheme
      signed short led_bits[8];     // array of 8 possible LED bitmask settings
      char *vend_name;  // device name
} hfcsusb_vdata;

/* VID/PID device list */
static struct usb_device_id hfcusb_idtab[] = {
      {
       USB_DEVICE(0x0959, 0x2bd0),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_OFF, {4, 0, 2, 1},
                     "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
      },
      {
       USB_DEVICE(0x0675, 0x1688),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {1, 2, 0, 0},
                     "DrayTek miniVigor 128 USB ISDN TA"}),
      },
      {
       USB_DEVICE(0x07b0, 0x0007),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {0x80, -64, -32, -16},
                     "Billion tiny USB ISDN TA 128"}),
      },
      {
       USB_DEVICE(0x0742, 0x2008),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {4, 0, 2, 1},
                     "Stollmann USB TA"}),
      },
      {
       USB_DEVICE(0x0742, 0x2009),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {4, 0, 2, 1},
                     "Aceex USB ISDN TA"}),
      },
      {
       USB_DEVICE(0x0742, 0x200A),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {4, 0, 2, 1},
                     "OEM USB ISDN TA"}),
      },
      {
       USB_DEVICE(0x08e3, 0x0301),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {2, 0, 1, 4},
                     "Olitec USB RNIS"}),
      },
      {
       USB_DEVICE(0x07fa, 0x0846),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {0x80, -64, -32, -16},
                     "Bewan Modem RNIS USB"}),
      },
      {
       USB_DEVICE(0x07fa, 0x0847),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {0x80, -64, -32, -16},
                     "Djinn Numeris USB"}),
      },
      {
       USB_DEVICE(0x07b0, 0x0006),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {0x80, -64, -32, -16},
                     "Twister ISDN TA"}),
      },
      {
       USB_DEVICE(0x071d, 0x1005),
       .driver_info = (unsigned long) &((hfcsusb_vdata)
                    {LED_SCHEME1, {0x02, 0, 0x01, 0x04},
                     "Eicon DIVA USB 4.0"}),
      },
      { }
};

/* structure defining input+output fifos (interrupt/bulk mode) */
struct usb_fifo;        /* forward definition */
typedef struct iso_urb_struct {
      struct urb *purb;
      __u8 buffer[ISO_BUFFER_SIZE]; /* buffer incoming/outgoing data */
      struct usb_fifo *owner_fifo;  /* pointer to owner fifo */
} iso_urb_struct;

struct hfcusb_data;           /* forward definition */

typedef struct usb_fifo {
      int fifonum;            /* fifo index attached to this structure */
      int active;       /* fifo is currently active */
      struct hfcusb_data *hfc;      /* pointer to main structure */
      int pipe;         /* address of endpoint */
      __u8 usb_packet_maxlen; /* maximum length for usb transfer */
      unsigned int max_size;  /* maximum size of receive/send packet */
      __u8 intervall;         /* interrupt interval */
      struct sk_buff *skbuff; /* actual used buffer */
      struct urb *urb;  /* transfer structure for usb routines */
      __u8 buffer[128]; /* buffer incoming/outgoing data */
      int bit_line;           /* how much bits are in the fifo? */

      volatile __u8 usb_transfer_mode;    /* switched between ISO and INT */
      iso_urb_struct iso[2];  /* need two urbs to have one always for pending */
      struct hisax_if *hif;   /* hisax interface */
      int delete_flg;         /* only delete skbuff once */
      int last_urblen;  /* remember length of last packet */
} usb_fifo;

/* structure holding all data for one device */
typedef struct hfcusb_data {
      /* HiSax Interface for loadable Layer1 drivers */
      struct hisax_d_if d_if;       /* see hisax_if.h */
      struct hisax_b_if b_if[2];    /* see hisax_if.h */
      int protocol;

      struct usb_device *dev; /* our device */
      int if_used;            /* used interface number */
      int alt_used;           /* used alternate config */
      int ctrl_paksize; /* control pipe packet size */
      int ctrl_in_pipe, /* handles for control pipe */
          ctrl_out_pipe;
      int cfg_used;           /* configuration index used */
      int vend_idx;           /* vendor found */
      int b_mode[2];          /* B-channel mode */
      int l1_activated; /* layer 1 activated */
      int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
      int packet_size, iso_packet_size;

      /* control pipe background handling */
      ctrl_buft ctrl_buff[HFC_CTRL_BUFSIZE];    /* buffer holding queued data */
      volatile int ctrl_in_idx, ctrl_out_idx, ctrl_cnt;     /* input/output pointer + count */
      struct urb *ctrl_urb;   /* transfer structure for control channel */

      struct usb_ctrlrequest ctrl_write;  /* buffer for control write request */
      struct usb_ctrlrequest ctrl_read;   /* same for read request */

      __u8 old_led_state, led_state;

      volatile __u8 threshold_mask; /* threshold actually reported */
      volatile __u8 bch_enables;    /* or mask for sctrl_r and sctrl register values */

      usb_fifo fifos[HFCUSB_NUM_FIFOS];   /* structure holding all fifo data */

      volatile __u8 l1_state; /* actual l1 state */
      struct timer_list t3_timer;   /* timer 3 for activation/deactivation */
      struct timer_list t4_timer;   /* timer 4 for activation/deactivation */
} hfcusb_data;


static void collect_rx_frame(usb_fifo * fifo, __u8 * data, int len,
                       int finish);

static inline const char *
symbolic(struct hfcusb_symbolic_list list[], const int num)
{
      int i;
      for (i = 0; list[i].name != NULL; i++)
            if (list[i].num == num)
                  return (list[i].name);
      return "<unknown ERROR>";
}

static void
ctrl_start_transfer(hfcusb_data * hfc)
{
      if (hfc->ctrl_cnt) {
            hfc->ctrl_urb->pipe = hfc->ctrl_out_pipe;
            hfc->ctrl_urb->setup_packet = (u_char *) & hfc->ctrl_write;
            hfc->ctrl_urb->transfer_buffer = NULL;
            hfc->ctrl_urb->transfer_buffer_length = 0;
            hfc->ctrl_write.wIndex =
                cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].hfc_reg);
            hfc->ctrl_write.wValue =
                cpu_to_le16(hfc->ctrl_buff[hfc->ctrl_out_idx].reg_val);

            usb_submit_urb(hfc->ctrl_urb, GFP_ATOMIC);      /* start transfer */
      }
}                       /* ctrl_start_transfer */

static int
queue_control_request(hfcusb_data * hfc, __u8 reg, __u8 val, int action)
{
      ctrl_buft *buf;

      if (hfc->ctrl_cnt >= HFC_CTRL_BUFSIZE)
            return (1); /* no space left */
      buf = &hfc->ctrl_buff[hfc->ctrl_in_idx];  /* pointer to new index */
      buf->hfc_reg = reg;
      buf->reg_val = val;
      buf->action = action;
      if (++hfc->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
            hfc->ctrl_in_idx = 0;   /* pointer wrap */
      if (++hfc->ctrl_cnt == 1)
            ctrl_start_transfer(hfc);
      return (0);
}

static void
ctrl_complete(struct urb *urb)
{
      hfcusb_data *hfc = (hfcusb_data *) urb->context;
      ctrl_buft *buf;

      urb->dev = hfc->dev;
      if (hfc->ctrl_cnt) {
            buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
            hfc->ctrl_cnt--;  /* decrement actual count */
            if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
                  hfc->ctrl_out_idx = 0;  /* pointer wrap */

            ctrl_start_transfer(hfc);     /* start next transfer */
      }
}

/* write led data to auxport & invert if necessary */
static void
write_led(hfcusb_data * hfc, __u8 led_state)
{
      if (led_state != hfc->old_led_state) {
            hfc->old_led_state = led_state;
            queue_control_request(hfc, HFCUSB_P_DATA, led_state, 1);
      }
}

static void
set_led_bit(hfcusb_data * hfc, signed short led_bits, int on)
{
      if (on) {
            if (led_bits < 0)
                  hfc->led_state &= ~abs(led_bits);
            else
                  hfc->led_state |= led_bits;
      } else {
            if (led_bits < 0)
                  hfc->led_state |= abs(led_bits);
            else
                  hfc->led_state &= ~led_bits;
      }
}

/* handle LED requests */
static void
handle_led(hfcusb_data * hfc, int event)
{
      hfcsusb_vdata *driver_info =
          (hfcsusb_vdata *) hfcusb_idtab[hfc->vend_idx].driver_info;

      /* if no scheme -> no LED action */
      if (driver_info->led_scheme == LED_OFF)
            return;

      switch (event) {
            case LED_POWER_ON:
                  set_led_bit(hfc, driver_info->led_bits[0], 1);
                  set_led_bit(hfc, driver_info->led_bits[1], 0);
                  set_led_bit(hfc, driver_info->led_bits[2], 0);
                  set_led_bit(hfc, driver_info->led_bits[3], 0);
                  break;
            case LED_POWER_OFF:
                  set_led_bit(hfc, driver_info->led_bits[0], 0);
                  set_led_bit(hfc, driver_info->led_bits[1], 0);
                  set_led_bit(hfc, driver_info->led_bits[2], 0);
                  set_led_bit(hfc, driver_info->led_bits[3], 0);
                  break;
            case LED_S0_ON:
                  set_led_bit(hfc, driver_info->led_bits[1], 1);
                  break;
            case LED_S0_OFF:
                  set_led_bit(hfc, driver_info->led_bits[1], 0);
                  break;
            case LED_B1_ON:
                  set_led_bit(hfc, driver_info->led_bits[2], 1);
                  break;
            case LED_B1_OFF:
                  set_led_bit(hfc, driver_info->led_bits[2], 0);
                  break;
            case LED_B2_ON:
                  set_led_bit(hfc, driver_info->led_bits[3], 1);
                  break;
            case LED_B2_OFF:
                  set_led_bit(hfc, driver_info->led_bits[3], 0);
                  break;
      }
      write_led(hfc, hfc->led_state);
}

/* ISDN l1 timer T3 expires */
static void
l1_timer_expire_t3(hfcusb_data * hfc)
{
      hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
                     NULL);

      DBG(HFCUSB_DBG_STATES,
          "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");

      hfc->l1_activated = 0;
      handle_led(hfc, LED_S0_OFF);
      /* deactivate : */
      queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
      queue_control_request(hfc, HFCUSB_STATES, 3, 1);
}

/* ISDN l1 timer T4 expires */
static void
l1_timer_expire_t4(hfcusb_data * hfc)
{
      hfc->d_if.ifc.l1l2(&hfc->d_if.ifc, PH_DEACTIVATE | INDICATION,
                     NULL);

      DBG(HFCUSB_DBG_STATES,
          "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");

      hfc->l1_activated = 0;
      handle_led(hfc, LED_S0_OFF);
}

/* S0 state changed */
static void
s0_state_handler(hfcusb_data * hfc, __u8 state)
{
      __u8 old_state;

      old_state = hfc->l1_state;
      if (state == old_state || state < 1 || state > 8)
            return;

      DBG(HFCUSB_DBG_STATES, "HFC-S USB: S0 statechange(%d -> %d)",
          old_state, state);

      if (state < 4 || state == 7 || state == 8) {
            if (timer_pending(&hfc->t3_timer))
                  del_timer(&hfc->t3_timer);
            DBG(HFCUSB_DBG_STATES, "HFC-S USB: T3 deactivated");
      }
      if (state >= 7) {
            if (timer_pending(&hfc->t4_timer))
                  del_timer(&hfc->t4_timer);
            DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 deactivated");
      }

      if (state == 7 && !hfc->l1_activated) {
            hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
                           PH_ACTIVATE | INDICATION, NULL);
            DBG(HFCUSB_DBG_STATES, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
            hfc->l1_activated = 1;
            handle_led(hfc, LED_S0_ON);
      } else if (state <= 3 /* && activated */ ) {
            if (old_state == 7 || old_state == 8) {
                  DBG(HFCUSB_DBG_STATES, "HFC-S USB: T4 activated");
                  if (!timer_pending(&hfc->t4_timer)) {
                        hfc->t4_timer.expires =
                            jiffies + (HFC_TIMER_T4 * HZ) / 1000;
                        add_timer(&hfc->t4_timer);
                  }
            } else {
                  hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
                                 PH_DEACTIVATE | INDICATION,
                                 NULL);
                  DBG(HFCUSB_DBG_STATES,
                      "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
                  hfc->l1_activated = 0;
                  handle_led(hfc, LED_S0_OFF);
            }
      }
      hfc->l1_state = state;
}

static void
fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe,
            void *buf, int num_packets, int packet_size, int interval,
            usb_complete_t complete, void *context)
{
      int k;

      urb->dev = dev;
      urb->pipe = pipe;
      urb->complete = complete;
      urb->number_of_packets = num_packets;
      urb->transfer_buffer_length = packet_size * num_packets;
      urb->context = context;
      urb->transfer_buffer = buf;
      urb->transfer_flags = URB_ISO_ASAP;
      urb->actual_length = 0;
      urb->interval = interval;
      for (k = 0; k < num_packets; k++) {
            urb->iso_frame_desc[k].offset = packet_size * k;
            urb->iso_frame_desc[k].length = packet_size;
            urb->iso_frame_desc[k].actual_length = 0;
      }
}

/* allocs urbs and start isoc transfer with two pending urbs to avoid
 * gaps in the transfer chain
 */
static int
start_isoc_chain(usb_fifo * fifo, int num_packets_per_urb,
             usb_complete_t complete, int packet_size)
{
      int i, k, errcode;

      DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting ISO-URBs for fifo:%d\n",
          fifo->fifonum);

      /* allocate Memory for Iso out Urbs */
      for (i = 0; i < 2; i++) {
            if (!(fifo->iso[i].purb)) {
                  fifo->iso[i].purb =
                      usb_alloc_urb(num_packets_per_urb, GFP_KERNEL);
                  if (!(fifo->iso[i].purb)) {
                        printk(KERN_INFO
                               "alloc urb for fifo %i failed!!!",
                               fifo->fifonum);
                  }
                  fifo->iso[i].owner_fifo = (struct usb_fifo *) fifo;

                  /* Init the first iso */
                  if (ISO_BUFFER_SIZE >=
                      (fifo->usb_packet_maxlen *
                       num_packets_per_urb)) {
                        fill_isoc_urb(fifo->iso[i].purb,
                                    fifo->hfc->dev, fifo->pipe,
                                    fifo->iso[i].buffer,
                                    num_packets_per_urb,
                                    fifo->usb_packet_maxlen,
                                    fifo->intervall, complete,
                                    &fifo->iso[i]);
                        memset(fifo->iso[i].buffer, 0,
                               sizeof(fifo->iso[i].buffer));
                        /* defining packet delimeters in fifo->buffer */
                        for (k = 0; k < num_packets_per_urb; k++) {
                              fifo->iso[i].purb->
                                  iso_frame_desc[k].offset =
                                  k * packet_size;
                              fifo->iso[i].purb->
                                  iso_frame_desc[k].length =
                                  packet_size;
                        }
                  } else {
                        printk(KERN_INFO
                               "HFC-S USB: ISO Buffer size to small!\n");
                  }
            }
            fifo->bit_line = BITLINE_INF;

            errcode = usb_submit_urb(fifo->iso[i].purb, GFP_KERNEL);
            fifo->active = (errcode >= 0) ? 1 : 0;
            if (errcode < 0)
                  printk(KERN_INFO "HFC-S USB: usb_submit_urb URB nr:%d, error(%i): '%s'\n",
                         i, errcode, symbolic(urb_errlist, errcode));
      }
      return (fifo->active);
}

/* stops running iso chain and frees their pending urbs */
static void
stop_isoc_chain(usb_fifo * fifo)
{
      int i;

      for (i = 0; i < 2; i++) {
            if (fifo->iso[i].purb) {
                  DBG(HFCUSB_DBG_INIT,
                      "HFC-S USB: Stopping iso chain for fifo %i.%i",
                      fifo->fifonum, i);
                  usb_kill_urb(fifo->iso[i].purb);
                  usb_free_urb(fifo->iso[i].purb);
                  fifo->iso[i].purb = NULL;
            }
      }

      usb_kill_urb(fifo->urb);
      usb_free_urb(fifo->urb);
      fifo->urb = NULL;
      fifo->active = 0;
}

/* defines how much ISO packets are handled in one URB */
static int iso_packets[8] =
    { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
      ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
};

static void
tx_iso_complete(struct urb *urb)
{
      iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
      usb_fifo *fifo = context_iso_urb->owner_fifo;
      hfcusb_data *hfc = fifo->hfc;
      int k, tx_offset, num_isoc_packets, sink, len, current_len,
          errcode;
      int frame_complete, transp_mode, fifon, status;
      __u8 threshbit;

      fifon = fifo->fifonum;
      status = urb->status;

      tx_offset = 0;

      /* ISO transfer only partially completed,
         look at individual frame status for details */
      if (status == -EXDEV) {
            DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete with -EXDEV"
                ", urb->status %d, fifonum %d\n",
                status, fifon);

            for (k = 0; k < iso_packets[fifon]; ++k) {
                  errcode = urb->iso_frame_desc[k].status;
                  if (errcode)
                        DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: tx_iso_complete "
                               "packet %i, status: %i\n",
                               k, errcode);
            }

            // clear status, so go on with ISO transfers
            status = 0;
      }

      if (fifo->active && !status) {
            transp_mode = 0;
            if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
                  transp_mode = 1;

            /* is FifoFull-threshold set for our channel? */
            threshbit = (hfc->threshold_mask & (1 << fifon));
            num_isoc_packets = iso_packets[fifon];

            /* predict dataflow to avoid fifo overflow */
            if (fifon >= HFCUSB_D_TX) {
                  sink = (threshbit) ? SINK_DMIN : SINK_DMAX;
            } else {
                  sink = (threshbit) ? SINK_MIN : SINK_MAX;
            }
            fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
                        context_iso_urb->buffer, num_isoc_packets,
                        fifo->usb_packet_maxlen, fifo->intervall,
                        tx_iso_complete, urb->context);
            memset(context_iso_urb->buffer, 0,
                   sizeof(context_iso_urb->buffer));
            frame_complete = 0;

            /* Generate next ISO Packets */
            for (k = 0; k < num_isoc_packets; ++k) {
                  if (fifo->skbuff) {
                        len = fifo->skbuff->len;
                        /* we lower data margin every msec */
                        fifo->bit_line -= sink;
                        current_len = (0 - fifo->bit_line) / 8;
                        /* maximum 15 byte for every ISO packet makes our life easier */
                        if (current_len > 14)
                              current_len = 14;
                        current_len =
                            (len <=
                             current_len) ? len : current_len;
                        /* how much bit do we put on the line? */
                        fifo->bit_line += current_len * 8;

                        context_iso_urb->buffer[tx_offset] = 0;
                        if (current_len == len) {
                              if (!transp_mode) {
                                    /* here frame completion */
                                    context_iso_urb->
                                        buffer[tx_offset] = 1;
                                    /* add 2 byte flags and 16bit CRC at end of ISDN frame */
                                    fifo->bit_line += 32;
                              }
                              frame_complete = 1;
                        }

                        memcpy(context_iso_urb->buffer +
                               tx_offset + 1, fifo->skbuff->data,
                               current_len);
                        skb_pull(fifo->skbuff, current_len);

                        /* define packet delimeters within the URB buffer */
                        urb->iso_frame_desc[k].offset = tx_offset;
                        urb->iso_frame_desc[k].length =
                            current_len + 1;

                        tx_offset += (current_len + 1);
                  } else {
                        urb->iso_frame_desc[k].offset =
                            tx_offset++;

                        urb->iso_frame_desc[k].length = 1;
                        fifo->bit_line -= sink; /* we lower data margin every msec */

                        if (fifo->bit_line < BITLINE_INF) {
                              fifo->bit_line = BITLINE_INF;
                        }
                  }

                  if (frame_complete) {
                        fifo->delete_flg = 1;
                        fifo->hif->l1l2(fifo->hif,
                                    PH_DATA | CONFIRM,
                                    (void *) (unsigned long) fifo->skbuff->
                                    truesize);
                        if (fifo->skbuff && fifo->delete_flg) {
                              dev_kfree_skb_any(fifo->skbuff);
                              fifo->skbuff = NULL;
                              fifo->delete_flg = 0;
                        }
                        frame_complete = 0;
                  }
            }
            errcode = usb_submit_urb(urb, GFP_ATOMIC);
            if (errcode < 0) {
                  printk(KERN_INFO
                         "HFC-S USB: error submitting ISO URB: %d\n",
                         errcode);
            }
      } else {
            if (status && !hfc->disc_flag) {
                  printk(KERN_INFO
                         "HFC-S USB: tx_iso_complete: error(%i): '%s', fifonum=%d\n",
                         status, symbolic(urb_errlist, status), fifon);
            }
      }
}

static void
rx_iso_complete(struct urb *urb)
{
      iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
      usb_fifo *fifo = context_iso_urb->owner_fifo;
      hfcusb_data *hfc = fifo->hfc;
      int k, len, errcode, offset, num_isoc_packets, fifon, maxlen,
          status;
      unsigned int iso_status;
      __u8 *buf;
      static __u8 eof[8];

      fifon = fifo->fifonum;
      status = urb->status;

      if (urb->status == -EOVERFLOW) {
            DBG(HFCUSB_DBG_VERBOSE_USB,
                "HFC-USB: ignoring USB DATAOVERRUN fifo(%i)", fifon);
            status = 0;
      }

      /* ISO transfer only partially completed,
         look at individual frame status for details */
      if (status == -EXDEV) {
            DBG(HFCUSB_DBG_VERBOSE_USB, "HFC-S USB: rx_iso_complete with -EXDEV "
                "urb->status %d, fifonum %d\n",
                status, fifon);
            status = 0;
      }

      if (fifo->active && !status) {
            num_isoc_packets = iso_packets[fifon];
            maxlen = fifo->usb_packet_maxlen;
            for (k = 0; k < num_isoc_packets; ++k) {
                  len = urb->iso_frame_desc[k].actual_length;
                  offset = urb->iso_frame_desc[k].offset;
                  buf = context_iso_urb->buffer + offset;
                  iso_status = urb->iso_frame_desc[k].status;

                  if (iso_status && !hfc->disc_flag)
                        DBG(HFCUSB_DBG_VERBOSE_USB,
                            "HFC-S USB: rx_iso_complete "
                            "ISO packet %i, status: %i\n",
                            k, iso_status);

                  if (fifon == HFCUSB_D_RX) {
                        DBG(HFCUSB_DBG_VERBOSE_USB,
                               "HFC-S USB: ISO-D-RX lst_urblen:%2d "
                               "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
                               fifo->last_urblen, len, maxlen,
                               eof[5]);

                        DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
                  }

                  if (fifo->last_urblen != maxlen) {
                        /* the threshold mask is in the 2nd status byte */
                        hfc->threshold_mask = buf[1];
                        /* care for L1 state only for D-Channel
                           to avoid overlapped iso completions */
                        if (fifon == HFCUSB_D_RX) {
                              /* the S0 state is in the upper half
                                 of the 1st status byte */
                              s0_state_handler(hfc, buf[0] >> 4);
                        }
                        eof[fifon] = buf[0] & 1;
                        if (len > 2)
                              collect_rx_frame(fifo, buf + 2,
                                           len - 2,
                                           (len < maxlen) ?
                                           eof[fifon] : 0);
                  } else {
                        collect_rx_frame(fifo, buf, len,
                                     (len <
                                      maxlen) ? eof[fifon] :
                                     0);
                  }
                  fifo->last_urblen = len;
            }

            fill_isoc_urb(urb, fifo->hfc->dev, fifo->pipe,
                        context_iso_urb->buffer, num_isoc_packets,
                        fifo->usb_packet_maxlen, fifo->intervall,
                        rx_iso_complete, urb->context);
            errcode = usb_submit_urb(urb, GFP_ATOMIC);
            if (errcode < 0) {
                  printk(KERN_ERR
                         "HFC-S USB: error submitting ISO URB: %d\n",
                         errcode);
            }
      } else {
            if (status && !hfc->disc_flag) {
                  printk(KERN_ERR
                         "HFC-S USB: rx_iso_complete : "
                         "urb->status %d, fifonum %d\n",
                         status, fifon);
            }
      }
}

/* collect rx data from INT- and ISO-URBs  */
static void
collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
{
      hfcusb_data *hfc = fifo->hfc;
      int transp_mode, fifon;

      fifon = fifo->fifonum;
      transp_mode = 0;
      if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
            transp_mode = 1;

      if (!fifo->skbuff) {
            fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
            if (!fifo->skbuff) {
                  printk(KERN_ERR
                         "HFC-S USB: cannot allocate buffer for fifo(%d)\n",
                         fifon);
                  return;
            }
      }
      if (len) {
            if (fifo->skbuff->len + len < fifo->max_size) {
                  memcpy(skb_put(fifo->skbuff, len), data, len);
            } else {
                  DBG(HFCUSB_DBG_FIFO_ERR,
                         "HCF-USB: got frame exceeded fifo->max_size(%d) fifo(%d)",
                         fifo->max_size, fifon);
                  DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
                  skb_trim(fifo->skbuff, 0);
            }
      }
      if (transp_mode && fifo->skbuff->len >= 128) {
            fifo->hif->l1l2(fifo->hif, PH_DATA | INDICATION,
                        fifo->skbuff);
            fifo->skbuff = NULL;
            return;
      }
      /* we have a complete hdlc packet */
      if (finish) {
            if ((!fifo->skbuff->data[fifo->skbuff->len - 1])
                && (fifo->skbuff->len > 3)) {

                  if (fifon == HFCUSB_D_RX) {
                        DBG(HFCUSB_DBG_DCHANNEL,
                            "HFC-S USB: D-RX len(%d)", fifo->skbuff->len);
                        DBG_SKB(HFCUSB_DBG_DCHANNEL, fifo->skbuff);
                  }

                  /* remove CRC & status */
                  skb_trim(fifo->skbuff, fifo->skbuff->len - 3);
                  if (fifon == HFCUSB_PCM_RX) {
                        fifo->hif->l1l2(fifo->hif,
                                    PH_DATA_E | INDICATION,
                                    fifo->skbuff);
                  } else
                        fifo->hif->l1l2(fifo->hif,
                                    PH_DATA | INDICATION,
                                    fifo->skbuff);
                  fifo->skbuff = NULL;    /* buffer was freed from upper layer */
            } else {
                  DBG(HFCUSB_DBG_FIFO_ERR,
                      "HFC-S USB: ERROR frame len(%d) fifo(%d)",
                      fifo->skbuff->len, fifon);
                  DBG_SKB(HFCUSB_DBG_VERBOSE_USB, fifo->skbuff);
                  skb_trim(fifo->skbuff, 0);
            }
      }
}

static void
rx_int_complete(struct urb *urb)
{
      int len;
      int status;
      __u8 *buf, maxlen, fifon;
      usb_fifo *fifo = (usb_fifo *) urb->context;
      hfcusb_data *hfc = fifo->hfc;
      static __u8 eof[8];

      urb->dev = hfc->dev;    /* security init */

      fifon = fifo->fifonum;
      if ((!fifo->active) || (urb->status)) {
            DBG(HFCUSB_DBG_INIT, "HFC-S USB: RX-Fifo %i is going down (%i)",
                fifon, urb->status);

            fifo->urb->interval = 0;      /* cancel automatic rescheduling */
            if (fifo->skbuff) {
                  dev_kfree_skb_any(fifo->skbuff);
                  fifo->skbuff = NULL;
            }
            return;
      }
      len = urb->actual_length;
      buf = fifo->buffer;
      maxlen = fifo->usb_packet_maxlen;

      if (fifon == HFCUSB_D_RX) {
            DBG(HFCUSB_DBG_VERBOSE_USB,
                   "HFC-S USB: INT-D-RX lst_urblen:%2d "
                   "act_urblen:%2d max-urblen:%2d EOF:0x%0x",
                   fifo->last_urblen, len, maxlen,
                   eof[5]);
            DBG_PACKET(HFCUSB_DBG_VERBOSE_USB, buf, len);
      }

      if (fifo->last_urblen != fifo->usb_packet_maxlen) {
            /* the threshold mask is in the 2nd status byte */
            hfc->threshold_mask = buf[1];
            /* the S0 state is in the upper half of the 1st status byte */
            s0_state_handler(hfc, buf[0] >> 4);
            eof[fifon] = buf[0] & 1;
            /* if we have more than the 2 status bytes -> collect data */
            if (len > 2)
                  collect_rx_frame(fifo, buf + 2,
                               urb->actual_length - 2,
                               (len < maxlen) ? eof[fifon] : 0);
      } else {
            collect_rx_frame(fifo, buf, urb->actual_length,
                         (len < maxlen) ? eof[fifon] : 0);
      }
      fifo->last_urblen = urb->actual_length;
      status = usb_submit_urb(urb, GFP_ATOMIC);
      if (status) {
            printk(KERN_INFO
                   "HFC-S USB: %s error resubmitting URB fifo(%d)\n",
                   __FUNCTION__, fifon);
      }
}

/* start initial INT-URB for certain fifo */
static void
start_int_fifo(usb_fifo * fifo)
{
      int errcode;

      DBG(HFCUSB_DBG_INIT, "HFC-S USB: starting RX INT-URB for fifo:%d\n",
          fifo->fifonum);

      if (!fifo->urb) {
            fifo->urb = usb_alloc_urb(0, GFP_KERNEL);
            if (!fifo->urb)
                  return;
      }
      usb_fill_int_urb(fifo->urb, fifo->hfc->dev, fifo->pipe,
                   fifo->buffer, fifo->usb_packet_maxlen,
                   rx_int_complete, fifo, fifo->intervall);
      fifo->active = 1; /* must be marked active */
      errcode = usb_submit_urb(fifo->urb, GFP_KERNEL);
      if (errcode) {
            printk(KERN_ERR
                   "HFC-S USB: submit URB error(start_int_info): status:%i\n",
                   errcode);
            fifo->active = 0;
            fifo->skbuff = NULL;
      }
}

static void
setup_bchannel(hfcusb_data * hfc, int channel, int mode)
{
      __u8 val, idx_table[2] = { 0, 2 };

      if (hfc->disc_flag) {
            return;
      }
      DBG(HFCUSB_DBG_STATES, "HFC-S USB: setting channel %d to mode %d",
          channel, mode);
      hfc->b_mode[channel] = mode;

      /* setup CON_HDLC */
      val = 0;
      if (mode != L1_MODE_NULL)
            val = 8;    /* enable fifo? */
      if (mode == L1_MODE_TRANS)
            val |= 2;   /* set transparent bit */

      /* set FIFO to transmit register */
      queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel], 1);
      queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
      /* reset fifo */
      queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);
      /* set FIFO to receive register */
      queue_control_request(hfc, HFCUSB_FIFO, idx_table[channel] + 1, 1);
      queue_control_request(hfc, HFCUSB_CON_HDLC, val, 1);
      /* reset fifo */
      queue_control_request(hfc, HFCUSB_INC_RES_F, 2, 1);

      val = 0x40;
      if (hfc->b_mode[0])
            val |= 1;
      if (hfc->b_mode[1])
            val |= 2;
      queue_control_request(hfc, HFCUSB_SCTRL, val, 1);

      val = 0;
      if (hfc->b_mode[0])
            val |= 1;
      if (hfc->b_mode[1])
            val |= 2;
      queue_control_request(hfc, HFCUSB_SCTRL_R, val, 1);

      if (mode == L1_MODE_NULL) {
            if (channel)
                  handle_led(hfc, LED_B2_OFF);
            else
                  handle_led(hfc, LED_B1_OFF);
      } else {
            if (channel)
                  handle_led(hfc, LED_B2_ON);
            else
                  handle_led(hfc, LED_B1_ON);
      }
}

static void
hfc_usb_l2l1(struct hisax_if *my_hisax_if, int pr, void *arg)
{
      usb_fifo *fifo = my_hisax_if->priv;
      hfcusb_data *hfc = fifo->hfc;

      switch (pr) {
            case PH_ACTIVATE | REQUEST:
                  if (fifo->fifonum == HFCUSB_D_TX) {
                        DBG(HFCUSB_DBG_STATES,
                            "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_ACTIVATE | REQUEST");

                        if (hfc->l1_state != 3
                            && hfc->l1_state != 7) {
                              hfc->d_if.ifc.l1l2(&hfc->d_if.ifc,
                                             PH_DEACTIVATE |
                                             INDICATION,
                                             NULL);
                              DBG(HFCUSB_DBG_STATES,
                                  "HFC-S USB: PH_DEACTIVATE | INDICATION sent (not state 3 or 7)");
                        } else {
                              if (hfc->l1_state == 7) {     /* l1 already active */
                                    hfc->d_if.ifc.l1l2(&hfc->
                                                   d_if.
                                                   ifc,
                                                   PH_ACTIVATE
                                                   |
                                                   INDICATION,
                                                   NULL);
                                    DBG(HFCUSB_DBG_STATES,
                                        "HFC-S USB: PH_ACTIVATE | INDICATION sent again ;)");
                              } else {
                                    /* force sending sending INFO1 */
                                    queue_control_request(hfc,
                                                      HFCUSB_STATES,
                                                      0x14,
                                                      1);
                                    mdelay(1);
                                    /* start l1 activation */
                                    queue_control_request(hfc,
                                                      HFCUSB_STATES,
                                                      0x04,
                                                      1);
                                    if (!timer_pending
                                        (&hfc->t3_timer)) {
                                          hfc->t3_timer.
                                              expires =
                                              jiffies +
                                              (HFC_TIMER_T3 *
                                               HZ) / 1000;
                                          add_timer(&hfc->
                                                  t3_timer);
                                    }
                              }
                        }
                  } else {
                        DBG(HFCUSB_DBG_STATES,
                            "HFC_USB: hfc_usb_d_l2l1 B-chan: PH_ACTIVATE | REQUEST");
                        setup_bchannel(hfc,
                                  (fifo->fifonum ==
                                   HFCUSB_B1_TX) ? 0 : 1,
                                  (long) arg);
                        fifo->hif->l1l2(fifo->hif,
                                    PH_ACTIVATE | INDICATION,
                                    NULL);
                  }
                  break;
            case PH_DEACTIVATE | REQUEST:
                  if (fifo->fifonum == HFCUSB_D_TX) {
                        DBG(HFCUSB_DBG_STATES,
                            "HFC_USB: hfc_usb_d_l2l1 D-chan: PH_DEACTIVATE | REQUEST");
                  } else {
                        DBG(HFCUSB_DBG_STATES,
                            "HFC_USB: hfc_usb_d_l2l1 Bx-chan: PH_DEACTIVATE | REQUEST");
                        setup_bchannel(hfc,
                                  (fifo->fifonum ==
                                   HFCUSB_B1_TX) ? 0 : 1,
                                  (int) L1_MODE_NULL);
                        fifo->hif->l1l2(fifo->hif,
                                    PH_DEACTIVATE | INDICATION,
                                    NULL);
                  }
                  break;
            case PH_DATA | REQUEST:
                  if (fifo->skbuff && fifo->delete_flg) {
                        dev_kfree_skb_any(fifo->skbuff);
                        fifo->skbuff = NULL;
                        fifo->delete_flg = 0;
                  }
                  fifo->skbuff = arg;     /* we have a new buffer */
                  break;
            default:
                  DBG(HFCUSB_DBG_STATES,
                         "HFC_USB: hfc_usb_d_l2l1: unkown state : %#x", pr);
                  break;
      }
}

/* initial init HFC-S USB chip registers, HiSax interface, USB URBs */
static int
hfc_usb_init(hfcusb_data * hfc)
{
      usb_fifo *fifo;
      int i, err;
      u_char b;
      struct hisax_b_if *p_b_if[2];

      /* check the chip id */
      if (read_usb(hfc, HFCUSB_CHIP_ID, &b) != 1) {
            printk(KERN_INFO "HFC-USB: cannot read chip id\n");
            return (1);
      }
      if (b != HFCUSB_CHIPID) {
            printk(KERN_INFO "HFC-S USB: Invalid chip id 0x%02x\n", b);
            return (1);
      }

      /* first set the needed config, interface and alternate */
      err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);

      /* do Chip reset */
      write_usb(hfc, HFCUSB_CIRM, 8);
      /* aux = output, reset off */
      write_usb(hfc, HFCUSB_CIRM, 0x10);

      /* set USB_SIZE to match wMaxPacketSize for INT or BULK transfers */
      write_usb(hfc, HFCUSB_USB_SIZE,
              (hfc->packet_size / 8) | ((hfc->packet_size / 8) << 4));

      /* set USB_SIZE_I to match wMaxPacketSize for ISO transfers */
      write_usb(hfc, HFCUSB_USB_SIZE_I, hfc->iso_packet_size);

      /* enable PCM/GCI master mode */
      write_usb(hfc, HFCUSB_MST_MODE1, 0);      /* set default values */
      write_usb(hfc, HFCUSB_MST_MODE0, 1);      /* enable master mode */

      /* init the fifos */
      write_usb(hfc, HFCUSB_F_THRES,
              (HFCUSB_TX_THRESHOLD /
               8) | ((HFCUSB_RX_THRESHOLD / 8) << 4));

      fifo = hfc->fifos;
      for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
            write_usb(hfc, HFCUSB_FIFO, i);     /* select the desired fifo */
            fifo[i].skbuff = NULL;  /* init buffer pointer */
            fifo[i].max_size =
                (i <= HFCUSB_B2_RX) ? MAX_BCH_SIZE : MAX_DFRAME_LEN;
            fifo[i].last_urblen = 0;
            /* set 2 bit for D- & E-channel */
            write_usb(hfc, HFCUSB_HDLC_PAR,
                    ((i <= HFCUSB_B2_RX) ? 0 : 2));
            /* rx hdlc, enable IFF for D-channel */
            write_usb(hfc, HFCUSB_CON_HDLC,
                    ((i == HFCUSB_D_TX) ? 0x09 : 0x08));
            write_usb(hfc, HFCUSB_INC_RES_F, 2);      /* reset the fifo */
      }

      write_usb(hfc, HFCUSB_CLKDEL, 0x0f);      /* clock delay value */
      write_usb(hfc, HFCUSB_STATES, 3 | 0x10);  /* set deactivated mode */
      write_usb(hfc, HFCUSB_STATES, 3);   /* enable state machine */

      write_usb(hfc, HFCUSB_SCTRL_R, 0);  /* disable both B receivers */
      write_usb(hfc, HFCUSB_SCTRL, 0x40); /* disable B transmitters + capacitive mode */

      /* set both B-channel to not connected */
      hfc->b_mode[0] = L1_MODE_NULL;
      hfc->b_mode[1] = L1_MODE_NULL;

      hfc->l1_activated = 0;
      hfc->disc_flag = 0;
      hfc->led_state = 0;
      hfc->old_led_state = 0;

      /* init the t3 timer */
      init_timer(&hfc->t3_timer);
      hfc->t3_timer.data = (long) hfc;
      hfc->t3_timer.function = (void *) l1_timer_expire_t3;

      /* init the t4 timer */
      init_timer(&hfc->t4_timer);
      hfc->t4_timer.data = (long) hfc;
      hfc->t4_timer.function = (void *) l1_timer_expire_t4;

      /* init the background machinery for control requests */
      hfc->ctrl_read.bRequestType = 0xc0;
      hfc->ctrl_read.bRequest = 1;
      hfc->ctrl_read.wLength = cpu_to_le16(1);
      hfc->ctrl_write.bRequestType = 0x40;
      hfc->ctrl_write.bRequest = 0;
      hfc->ctrl_write.wLength = 0;
      usb_fill_control_urb(hfc->ctrl_urb,
                       hfc->dev,
                       hfc->ctrl_out_pipe,
                       (u_char *) & hfc->ctrl_write,
                       NULL, 0, ctrl_complete, hfc);
      /* Init All Fifos */
      for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
            hfc->fifos[i].iso[0].purb = NULL;
            hfc->fifos[i].iso[1].purb = NULL;
            hfc->fifos[i].active = 0;
      }
      /* register Modul to upper Hisax Layers */
      hfc->d_if.owner = THIS_MODULE;
      hfc->d_if.ifc.priv = &hfc->fifos[HFCUSB_D_TX];
      hfc->d_if.ifc.l2l1 = hfc_usb_l2l1;
      for (i = 0; i < 2; i++) {
            hfc->b_if[i].ifc.priv = &hfc->fifos[HFCUSB_B1_TX + i * 2];
            hfc->b_if[i].ifc.l2l1 = hfc_usb_l2l1;
            p_b_if[i] = &hfc->b_if[i];
      }
      /* default Prot: EURO ISDN, should be a module_param */
      hfc->protocol = 2;
      i = hisax_register(&hfc->d_if, p_b_if, "hfc_usb", hfc->protocol);
      if (i) {
            printk(KERN_INFO "HFC-S USB: hisax_register -> %d\n", i);
            return i;
      }

#ifdef CONFIG_HISAX_DEBUG
      hfc_debug = debug;
#endif

      for (i = 0; i < 4; i++)
            hfc->fifos[i].hif = &p_b_if[i / 2]->ifc;
      for (i = 4; i < 8; i++)
            hfc->fifos[i].hif = &hfc->d_if.ifc;

      /* 3 (+1) INT IN + 3 ISO OUT */
      if (hfc->cfg_used == CNF_3INT3ISO || hfc->cfg_used == CNF_4INT3ISO) {
            start_int_fifo(hfc->fifos + HFCUSB_D_RX);
            if (hfc->fifos[HFCUSB_PCM_RX].pipe)
                  start_int_fifo(hfc->fifos + HFCUSB_PCM_RX);
            start_int_fifo(hfc->fifos + HFCUSB_B1_RX);
            start_int_fifo(hfc->fifos + HFCUSB_B2_RX);
      }
      /* 3 (+1) ISO IN + 3 ISO OUT */
      if (hfc->cfg_used == CNF_3ISO3ISO || hfc->cfg_used == CNF_4ISO3ISO) {
            start_isoc_chain(hfc->fifos + HFCUSB_D_RX, ISOC_PACKETS_D,
                         rx_iso_complete, 16);
            if (hfc->fifos[HFCUSB_PCM_RX].pipe)
                  start_isoc_chain(hfc->fifos + HFCUSB_PCM_RX,
                               ISOC_PACKETS_D, rx_iso_complete,
                               16);
            start_isoc_chain(hfc->fifos + HFCUSB_B1_RX, ISOC_PACKETS_B,
                         rx_iso_complete, 16);
            start_isoc_chain(hfc->fifos + HFCUSB_B2_RX, ISOC_PACKETS_B,
                         rx_iso_complete, 16);
      }

      start_isoc_chain(hfc->fifos + HFCUSB_D_TX, ISOC_PACKETS_D,
                   tx_iso_complete, 1);
      start_isoc_chain(hfc->fifos + HFCUSB_B1_TX, ISOC_PACKETS_B,
                   tx_iso_complete, 1);
      start_isoc_chain(hfc->fifos + HFCUSB_B2_TX, ISOC_PACKETS_B,
                   tx_iso_complete, 1);

      handle_led(hfc, LED_POWER_ON);

      return (0);
}

/* initial callback for each plugged USB device */
static int
hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
      struct usb_device *dev = interface_to_usbdev(intf);
      hfcusb_data *context;
      struct usb_host_interface *iface = intf->cur_altsetting;
      struct usb_host_interface *iface_used = NULL;
      struct usb_host_endpoint *ep;
      int ifnum = iface->desc.bInterfaceNumber;
      int i, idx, alt_idx, probe_alt_setting, vend_idx, cfg_used, *vcf,
          attr, cfg_found, cidx, ep_addr;
      int cmptbl[16], small_match, iso_packet_size, packet_size,
          alt_used = 0;
      hfcsusb_vdata *driver_info;

      vend_idx = 0xffff;
      for (i = 0; hfcusb_idtab[i].idVendor; i++) {
            if ((le16_to_cpu(dev->descriptor.idVendor) == hfcusb_idtab[i].idVendor)
                && (le16_to_cpu(dev->descriptor.idProduct) == hfcusb_idtab[i].idProduct)) {
                  vend_idx = i;
                  continue;
            }
      }

      printk(KERN_INFO
             "HFC-S USB: probing interface(%d) actalt(%d) minor(%d)\n",
             ifnum, iface->desc.bAlternateSetting, intf->minor);

      if (vend_idx != 0xffff) {
            /* if vendor and product ID is OK, start probing alternate settings */
            alt_idx = 0;
            small_match = 0xffff;

            /* default settings */
            iso_packet_size = 16;
            packet_size = 64;

            while (alt_idx < intf->num_altsetting) {
                  iface = intf->altsetting + alt_idx;
                  probe_alt_setting = iface->desc.bAlternateSetting;
                  cfg_used = 0;

                  /* check for config EOL element */
                  while (validconf[cfg_used][0]) {
                        cfg_found = 1;
                        vcf = validconf[cfg_used];
                        /* first endpoint descriptor */
                        ep = iface->endpoint;

                        memcpy(cmptbl, vcf, 16 * sizeof(int));

                        /* check for all endpoints in this alternate setting */
                        for (i = 0; i < iface->desc.bNumEndpoints;
                             i++) {
                              ep_addr =
                                  ep->desc.bEndpointAddress;
                              /* get endpoint base */
                              idx = ((ep_addr & 0x7f) - 1) * 2;
                              if (ep_addr & 0x80)
                                    idx++;
                              attr = ep->desc.bmAttributes;
                              if (cmptbl[idx] == EP_NUL) {
                                    cfg_found = 0;
                              }
                              if (attr == USB_ENDPOINT_XFER_INT
                                  && cmptbl[idx] == EP_INT)
                                    cmptbl[idx] = EP_NUL;
                              if (attr == USB_ENDPOINT_XFER_BULK
                                  && cmptbl[idx] == EP_BLK)
                                    cmptbl[idx] = EP_NUL;
                              if (attr == USB_ENDPOINT_XFER_ISOC
                                  && cmptbl[idx] == EP_ISO)
                                    cmptbl[idx] = EP_NUL;

                              /* check if all INT endpoints match minimum interval */
                              if ((attr == USB_ENDPOINT_XFER_INT)
                                  && (ep->desc.bInterval < vcf[17])) {
                                    cfg_found = 0;
                              }
                              ep++;
                        }
                        for (i = 0; i < 16; i++) {
                              /* all entries must be EP_NOP or EP_NUL for a valid config */
                              if (cmptbl[i] != EP_NOP
                                  && cmptbl[i] != EP_NUL)
                                    cfg_found = 0;
                        }
                        if (cfg_found) {
                              if (cfg_used < small_match) {
                                    small_match = cfg_used;
                                    alt_used =
                                        probe_alt_setting;
                                    iface_used = iface;
                              }
                        }
                        cfg_used++;
                  }
                  alt_idx++;
            } /* (alt_idx < intf->num_altsetting) */

            /* found a valid USB Ta Endpint config */
            if (small_match != 0xffff) {
                  iface = iface_used;
                  if (!(context = kzalloc(sizeof(hfcusb_data), GFP_KERNEL)))
                        return (-ENOMEM); /* got no mem */

                  ep = iface->endpoint;
                  vcf = validconf[small_match];

                  for (i = 0; i < iface->desc.bNumEndpoints; i++) {
                        ep_addr = ep->desc.bEndpointAddress;
                        /* get endpoint base */
                        idx = ((ep_addr & 0x7f) - 1) * 2;
                        if (ep_addr & 0x80)
                              idx++;
                        cidx = idx & 7;
                        attr = ep->desc.bmAttributes;

                        /* init Endpoints */
                        if (vcf[idx] != EP_NOP
                            && vcf[idx] != EP_NUL) {
                              switch (attr) {
                                    case USB_ENDPOINT_XFER_INT:
                                          context->
                                              fifos[cidx].
                                              pipe =
                                              usb_rcvintpipe
                                              (dev,
                                               ep->desc.
                                               bEndpointAddress);
                                          context->
                                              fifos[cidx].
                                              usb_transfer_mode
                                              = USB_INT;
                                          packet_size =
                                              le16_to_cpu(ep->desc.wMaxPacketSize);
                                          break;
                                    case USB_ENDPOINT_XFER_BULK:
                                          if (ep_addr & 0x80)
                                                context->
                                                    fifos
                                                    [cidx].
                                                    pipe =
                                                    usb_rcvbulkpipe
                                                    (dev,
                                                     ep->
                                                     desc.
                                                     bEndpointAddress);
                                          else
                                                context->
                                                    fifos
                                                    [cidx].
                                                    pipe =
                                                    usb_sndbulkpipe
                                                    (dev,
                                                     ep->
                                                     desc.
                                                     bEndpointAddress);
                                          context->
                                              fifos[cidx].
                                              usb_transfer_mode
                                              = USB_BULK;
                                          packet_size =
                                              le16_to_cpu(ep->desc.wMaxPacketSize);
                                          break;
                                    case USB_ENDPOINT_XFER_ISOC:
                                          if (ep_addr & 0x80)
                                                context->
                                                    fifos
                                                    [cidx].
                                                    pipe =
                                                    usb_rcvisocpipe
                                                    (dev,
                                                     ep->
                                                     desc.
                                                     bEndpointAddress);
                                          else
                                                context->
                                                    fifos
                                                    [cidx].
                                                    pipe =
                                                    usb_sndisocpipe
                                                    (dev,
                                                     ep->
                                                     desc.
                                                     bEndpointAddress);
                                          context->
                                              fifos[cidx].
                                              usb_transfer_mode
                                              = USB_ISOC;
                                          iso_packet_size =
                                              le16_to_cpu(ep->desc.wMaxPacketSize);
                                          break;
                                    default:
                                          context->
                                              fifos[cidx].
                                              pipe = 0;
                              }     /* switch attribute */

                              if (context->fifos[cidx].pipe) {
                                    context->fifos[cidx].
                                        fifonum = cidx;
                                    context->fifos[cidx].hfc =
                                        context;
                                    context->fifos[cidx].usb_packet_maxlen =
                                        le16_to_cpu(ep->desc.wMaxPacketSize);
                                    context->fifos[cidx].
                                        intervall =
                                        ep->desc.bInterval;
                                    context->fifos[cidx].
                                        skbuff = NULL;
                              }
                        }
                        ep++;
                  }
                  context->dev = dev;     /* save device */
                  context->if_used = ifnum;     /* save used interface */
                  context->alt_used = alt_used; /* and alternate config */
                  context->ctrl_paksize = dev->descriptor.bMaxPacketSize0;    /* control size */
                  context->cfg_used = vcf[16];  /* store used config */
                  context->vend_idx = vend_idx; /* store found vendor */
                  context->packet_size = packet_size;
                  context->iso_packet_size = iso_packet_size;

                  /* create the control pipes needed for register access */
                  context->ctrl_in_pipe =
                      usb_rcvctrlpipe(context->dev, 0);
                  context->ctrl_out_pipe =
                      usb_sndctrlpipe(context->dev, 0);
                  context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);

                  driver_info =
                      (hfcsusb_vdata *) hfcusb_idtab[vend_idx].
                      driver_info;
                  printk(KERN_INFO "HFC-S USB: detected \"%s\"\n",
                         driver_info->vend_name);

                  DBG(HFCUSB_DBG_INIT,
                      "HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",
                      conf_str[small_match], context->if_used,
                      context->alt_used,
                      validconf[small_match][18]);

                  /* init the chip and register the driver */
                  if (hfc_usb_init(context)) {
                        usb_kill_urb(context->ctrl_urb);
                        usb_free_urb(context->ctrl_urb);
                        context->ctrl_urb = NULL;
                        kfree(context);
                        return (-EIO);
                  }
                  usb_set_intfdata(intf, context);
                  return (0);
            }
      } else {
            printk(KERN_INFO
                   "HFC-S USB: no valid vendor found in USB descriptor\n");
      }
      return (-EIO);
}

/* callback for unplugged USB device */
static void
hfc_usb_disconnect(struct usb_interface *intf)
{
      hfcusb_data *context = usb_get_intfdata(intf);
      int i;

      handle_led(context, LED_POWER_OFF);
      schedule_timeout(HZ / 100);

      printk(KERN_INFO "HFC-S USB: device disconnect\n");
      context->disc_flag = 1;
      usb_set_intfdata(intf, NULL);

      if (timer_pending(&context->t3_timer))
            del_timer(&context->t3_timer);
      if (timer_pending(&context->t4_timer))
            del_timer(&context->t4_timer);

      /* tell all fifos to terminate */
      for (i = 0; i < HFCUSB_NUM_FIFOS; i++) {
            if (context->fifos[i].usb_transfer_mode == USB_ISOC) {
                  if (context->fifos[i].active > 0) {
                        stop_isoc_chain(&context->fifos[i]);
                        DBG(HFCUSB_DBG_INIT,
                            "HFC-S USB: %s stopping ISOC chain Fifo(%i)",
                            __FUNCTION__, i);
                  }
            } else {
                  if (context->fifos[i].active > 0) {
                        context->fifos[i].active = 0;
                        DBG(HFCUSB_DBG_INIT,
                            "HFC-S USB: %s unlinking URB for Fifo(%i)",
                            __FUNCTION__, i);
                  }
                  usb_kill_urb(context->fifos[i].urb);
                  usb_free_urb(context->fifos[i].urb);
                  context->fifos[i].urb = NULL;
            }
            context->fifos[i].active = 0;
      }
      usb_kill_urb(context->ctrl_urb);
      usb_free_urb(context->ctrl_urb);
      context->ctrl_urb = NULL;
      hisax_unregister(&context->d_if);
      kfree(context);         /* free our structure again */
}

static struct usb_driver hfc_drv = {
      .name  = "hfc_usb",
      .id_table = hfcusb_idtab,
      .probe = hfc_usb_probe,
      .disconnect = hfc_usb_disconnect,
};

static void __exit
hfc_usb_mod_exit(void)
{
      usb_deregister(&hfc_drv); /* release our driver */
      printk(KERN_INFO "HFC-S USB: module removed\n");
}

static int __init
hfc_usb_mod_init(void)
{
      char revstr[30], datestr[30], dummy[30];
#ifndef CONFIG_HISAX_DEBUG
      hfc_debug = debug;
#endif
      sscanf(hfcusb_revision,
             "%s %s $ %s %s %s $ ", dummy, revstr,
             dummy, datestr, dummy);
      printk(KERN_INFO
             "HFC-S USB: driver module revision %s date %s loaded, (debug=%i)\n",
             revstr, datestr, debug);
      if (usb_register(&hfc_drv)) {
            printk(KERN_INFO
                   "HFC-S USB: Unable to register HFC-S USB module at usb stack\n");
            return (-1);      /* unable to register */
      }
      return (0);
}

module_init(hfc_usb_mod_init);
module_exit(hfc_usb_mod_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(usb, hfcusb_idtab);

Generated by  Doxygen 1.6.0   Back to index