st5481_d.c

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/*
 * Driver for ST5481 USB ISDN modem
 *
 * Author       Frode Isaksen
 * Copyright    2001 by Frode Isaksen      <[email protected]>
 *              2001 by Kai Germaschewski  <[email protected]>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/usb.h>
#include <linux/netdevice.h>
#include "st5481.h"

static void ph_connect(struct st5481_adapter *adapter);
static void ph_disconnect(struct st5481_adapter *adapter);

static struct Fsm l1fsm;

static char *strL1State[] =
{
    "ST_L1_F3",
    "ST_L1_F4",
    "ST_L1_F6",
    "ST_L1_F7",
    "ST_L1_F8",
};

static char *strL1Event[] =
{
    "EV_IND_DP",
    "EV_IND_1",
    "EV_IND_2",
    "EV_IND_3",
    "EV_IND_RSY",
    "EV_IND_5",
    "EV_IND_6",
    "EV_IND_7",
    "EV_IND_AP",
    "EV_IND_9",
    "EV_IND_10",
    "EV_IND_11",
    "EV_IND_AI8",
    "EV_IND_AI10",
    "EV_IND_AIL",
    "EV_IND_DI",
    "EV_PH_ACTIVATE_REQ",
    "EV_PH_DEACTIVATE_REQ",
    "EV_TIMER3",
};

static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg)
{
    struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if;

    ifc->l1l2(ifc, pr, arg);
}

static void
l1_go_f3(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    if (fi->state == ST_L1_F7)
        ph_disconnect(adapter);

    FsmChangeState(fi, ST_L1_F3);
    D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
}

static void
l1_go_f6(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    if (fi->state == ST_L1_F7)
        ph_disconnect(adapter);

    FsmChangeState(fi, ST_L1_F6);
}

static void
l1_go_f7(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    FsmDelTimer(&adapter->timer, 0);
    ph_connect(adapter);
    FsmChangeState(fi, ST_L1_F7);
    D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL);
}

static void
l1_go_f8(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    if (fi->state == ST_L1_F7)
        ph_disconnect(adapter);

    FsmChangeState(fi, ST_L1_F8);
}

static void
l1_timer3(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    st5481_ph_command(adapter, ST5481_CMD_DR);
    FsmChangeState(fi, ST_L1_F3);
    D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
}

static void
l1_ignore(struct FsmInst *fi, int event, void *arg)
{
}

static void
l1_activate(struct FsmInst *fi, int event, void *arg)
{
    struct st5481_adapter *adapter = fi->userdata;

    st5481_ph_command(adapter, ST5481_CMD_DR);
    st5481_ph_command(adapter, ST5481_CMD_PUP);
    FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
    st5481_ph_command(adapter, ST5481_CMD_AR8);
    FsmChangeState(fi, ST_L1_F4);
}

static struct FsmNode L1FnList[] __initdata =
{
    {ST_L1_F3, EV_IND_DP,            l1_ignore},
    {ST_L1_F3, EV_IND_AP,            l1_go_f6},
    {ST_L1_F3, EV_IND_AI8,           l1_go_f7},
    {ST_L1_F3, EV_IND_AI10,          l1_go_f7},
    {ST_L1_F3, EV_PH_ACTIVATE_REQ,   l1_activate},

    {ST_L1_F4, EV_TIMER3,            l1_timer3},
    {ST_L1_F4, EV_IND_DP,            l1_go_f3},
    {ST_L1_F4, EV_IND_AP,            l1_go_f6},
    {ST_L1_F4, EV_IND_AI8,           l1_go_f7},
    {ST_L1_F4, EV_IND_AI10,          l1_go_f7},

    {ST_L1_F6, EV_TIMER3,            l1_timer3},
    {ST_L1_F6, EV_IND_DP,            l1_go_f3},
    {ST_L1_F6, EV_IND_AP,            l1_ignore},
    {ST_L1_F6, EV_IND_AI8,           l1_go_f7},
    {ST_L1_F6, EV_IND_AI10,          l1_go_f7},
    {ST_L1_F7, EV_IND_RSY,           l1_go_f8},

    {ST_L1_F7, EV_IND_DP,            l1_go_f3},
    {ST_L1_F7, EV_IND_AP,            l1_go_f6},
    {ST_L1_F7, EV_IND_AI8,           l1_ignore},
    {ST_L1_F7, EV_IND_AI10,          l1_ignore},
    {ST_L1_F7, EV_IND_RSY,           l1_go_f8},

    {ST_L1_F8, EV_TIMER3,            l1_timer3},
    {ST_L1_F8, EV_IND_DP,            l1_go_f3},
    {ST_L1_F8, EV_IND_AP,            l1_go_f6},
    {ST_L1_F8, EV_IND_AI8,           l1_go_f8},
    {ST_L1_F8, EV_IND_AI10,          l1_go_f8},
    {ST_L1_F8, EV_IND_RSY,           l1_ignore},
};

static __printf(2, 3)
    void l1m_debug(struct FsmInst *fi, char *fmt, ...)
{
    va_list args;
    char buf[256];

    va_start(args, fmt);
    vsnprintf(buf, sizeof(buf), fmt, args);
    DBG(8, "%s", buf);
    va_end(args);
}

/* ======================================================================
 * D-Channel out
 */

/*
  D OUT state machine:
  ====================

  Transmit short frame (< 16 bytes of encoded data):

  L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
  --------    -----------           ---                  ---------

  FIXME

  -> [xx..xx]  SHORT_INIT            -> [7Exx..xxC1C27EFF]
  SHORT_WAIT_DEN        <> OUT_D_COUNTER=16

  END_OF_SHORT          <- DEN_EVENT         -> 7Exx
  xxxx
  xxxx
  xxxx
  xxxx
  xxxx
  C1C1
  7EFF
  WAIT_FOR_RESET_IDLE   <- D_UNDERRUN        <- (8ms)
  IDLE                  <> Reset pipe



  Transmit long frame (>= 16 bytes of encoded data):

  L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
  --------    -----------           ---                  ---------

  -> [xx...xx] IDLE
  WAIT_FOR_STOP         <> OUT_D_COUNTER=0
  WAIT_FOR_RESET        <> Reset pipe
  STOP
  INIT_LONG_FRAME       -> [7Exx..xx]
  WAIT_DEN              <> OUT_D_COUNTER=16
  OUT_NORMAL            <- DEN_EVENT       -> 7Exx
  END_OF_FRAME_BUSY     -> [xxxx]             xxxx
  END_OF_FRAME_NOT_BUSY -> [xxxx]             xxxx
  -> [xxxx]       xxxx
  -> [C1C2]       xxxx
  -> [7EFF]       xxxx
  xxxx
  xxxx
  ....
  xxxx
  C1C2
  7EFF
  <- D_UNDERRUN      <- (> 8ms)
  WAIT_FOR_STOP         <> OUT_D_COUNTER=0
  WAIT_FOR_RESET        <> Reset pipe
  STOP

*/

static struct Fsm dout_fsm;

static char *strDoutState[] =
{
    "ST_DOUT_NONE",

    "ST_DOUT_SHORT_INIT",
    "ST_DOUT_SHORT_WAIT_DEN",

    "ST_DOUT_LONG_INIT",
    "ST_DOUT_LONG_WAIT_DEN",
    "ST_DOUT_NORMAL",

    "ST_DOUT_WAIT_FOR_UNDERRUN",
    "ST_DOUT_WAIT_FOR_NOT_BUSY",
    "ST_DOUT_WAIT_FOR_STOP",
    "ST_DOUT_WAIT_FOR_RESET",
};

static char *strDoutEvent[] =
{
    "EV_DOUT_START_XMIT",
    "EV_DOUT_COMPLETE",
    "EV_DOUT_DEN",
    "EV_DOUT_RESETED",
    "EV_DOUT_STOPPED",
    "EV_DOUT_COLL",
    "EV_DOUT_UNDERRUN",
};

static __printf(2, 3)
    void dout_debug(struct FsmInst *fi, char *fmt, ...)
{
    va_list args;
    char buf[256];

    va_start(args, fmt);
    vsnprintf(buf, sizeof(buf), fmt, args);
    DBG(0x2, "%s", buf);
    va_end(args);
}

static void dout_stop_event(void *context)
{
    struct st5481_adapter *adapter = context;

    FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL);
}

/*
 * Start the transfer of a D channel frame.
 */
static void usb_d_out(struct st5481_adapter *adapter, int buf_nr)
{
    struct st5481_d_out *d_out = &adapter->d_out;
    struct urb *urb;
    unsigned int num_packets, packet_offset;
    int len, buf_size, bytes_sent;
    struct sk_buff *skb;
    struct usb_iso_packet_descriptor *desc;

    if (d_out->fsm.state != ST_DOUT_NORMAL)
        return;

    if (test_and_set_bit(buf_nr, &d_out->busy)) {
        DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
        return;
    }
    urb = d_out->urb[buf_nr];

    skb = d_out->tx_skb;

    buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT;

    if (skb) {
        len = isdnhdlc_encode(&d_out->hdlc_state,
                      skb->data, skb->len, &bytes_sent,
                      urb->transfer_buffer, buf_size);
        skb_pull(skb, bytes_sent);
    } else {
        // Send flags or idle
        len = isdnhdlc_encode(&d_out->hdlc_state,
                      NULL, 0, &bytes_sent,
                      urb->transfer_buffer, buf_size);
    }

    if (len < buf_size) {
        FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
    }
    if (skb && !skb->len) {
        d_out->tx_skb = NULL;
        D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
        dev_kfree_skb_any(skb);
    }

    // Prepare the URB
    urb->transfer_buffer_length = len;
    num_packets = 0;
    packet_offset = 0;
    while (packet_offset < len) {
        desc = &urb->iso_frame_desc[num_packets];
        desc->offset = packet_offset;
        desc->length = SIZE_ISO_PACKETS_D_OUT;
        if (len - packet_offset < desc->length)
            desc->length = len - packet_offset;
        num_packets++;
        packet_offset += desc->length;
    }
    urb->number_of_packets = num_packets;

    // Prepare the URB
    urb->dev = adapter->usb_dev;
    // Need to transmit the next buffer 2ms after the DEN_EVENT
    urb->transfer_flags = 0;
    urb->start_frame = usb_get_current_frame_number(adapter->usb_dev) + 2;

    DBG_ISO_PACKET(0x20, urb);

    if (usb_submit_urb(urb, GFP_KERNEL) < 0) {
        // There is another URB queued up
        urb->transfer_flags = URB_ISO_ASAP;
        SUBMIT_URB(urb, GFP_KERNEL);
    }
}

static void fifo_reseted(void *context)
{
    struct st5481_adapter *adapter = context;

    FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL);
}

static void usb_d_out_complete(struct urb *urb)
{
    struct st5481_adapter *adapter = urb->context;
    struct st5481_d_out *d_out = &adapter->d_out;
    long buf_nr;

    DBG(2, "");

    buf_nr = get_buf_nr(d_out->urb, urb);
    test_and_clear_bit(buf_nr, &d_out->busy);

    if (unlikely(urb->status < 0)) {
        switch (urb->status) {
        case -ENOENT:
        case -ESHUTDOWN:
        case -ECONNRESET:
            DBG(1, "urb killed status %d", urb->status);
            break;
        default:
            WARNING("urb status %d", urb->status);
            if (d_out->busy == 0) {
                st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
            }
            break;
        }
        return; // Give up
    }

    FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr);
}

/* ====================================================================== */

static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg)
{
    // FIXME unify?
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;
    struct urb *urb;
    int len, bytes_sent;
    struct sk_buff *skb;
    int buf_nr = 0;

    skb = d_out->tx_skb;

    DBG(2, "len=%d", skb->len);

    isdnhdlc_out_init(&d_out->hdlc_state, HDLC_DCHANNEL | HDLC_BITREVERSE);

    if (test_and_set_bit(buf_nr, &d_out->busy)) {
        WARNING("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
        return;
    }
    urb = d_out->urb[buf_nr];

    DBG_SKB(0x10, skb);
    len = isdnhdlc_encode(&d_out->hdlc_state,
                  skb->data, skb->len, &bytes_sent,
                  urb->transfer_buffer, 16);
    skb_pull(skb, bytes_sent);

    if (len < 16)
        FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT);
    else
        FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT);

    if (skb->len == 0) {
        d_out->tx_skb = NULL;
        D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
        dev_kfree_skb_any(skb);
    }

// Prepare the URB
    urb->transfer_buffer_length = len;

    urb->iso_frame_desc[0].offset = 0;
    urb->iso_frame_desc[0].length = len;
    urb->number_of_packets = 1;

    // Prepare the URB
    urb->dev = adapter->usb_dev;
    urb->transfer_flags = URB_ISO_ASAP;

    DBG_ISO_PACKET(0x20, urb);
    SUBMIT_URB(urb, GFP_KERNEL);
}

static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN);
    st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
}

static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
}

static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
    FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN);
}

static void dout_long_den(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL);
    usb_d_out(adapter, 0);
    usb_d_out(adapter, 1);
}

static void dout_reset(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET);
    st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
}

static void dout_stop(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP);
    st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter);
}

static void dout_underrun(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) {
        FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY);
    }  else {
        dout_stop(fsm, event, arg);
    }
}

static void dout_check_busy(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy))
        dout_stop(fsm, event, arg);
}

static void dout_reseted(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    struct st5481_d_out *d_out = &adapter->d_out;

    FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
    // FIXME locking
    if (d_out->tx_skb)
        FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL);
}

static void dout_complete(struct FsmInst *fsm, int event, void *arg)
{
    struct st5481_adapter *adapter = fsm->userdata;
    long buf_nr = (long) arg;

    usb_d_out(adapter, buf_nr);
}

static void dout_ignore(struct FsmInst *fsm, int event, void *arg)
{
}

static struct FsmNode DoutFnList[] __initdata =
{
    {ST_DOUT_NONE,                   EV_DOUT_START_XMIT,   dout_start_xmit},

    {ST_DOUT_SHORT_INIT,             EV_DOUT_COMPLETE,     dout_short_fifo},

    {ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_DEN,          dout_end_short_frame},
    {ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_UNDERRUN,     dout_underrun},

    {ST_DOUT_LONG_INIT,              EV_DOUT_COMPLETE,     dout_long_enable_fifo},

    {ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_DEN,          dout_long_den},
    {ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_UNDERRUN,     dout_underrun},

    {ST_DOUT_NORMAL,                 EV_DOUT_UNDERRUN,     dout_underrun},
    {ST_DOUT_NORMAL,                 EV_DOUT_COMPLETE,     dout_complete},

    {ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_UNDERRUN,     dout_underrun},
    {ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_COMPLETE,     dout_ignore},

    {ST_DOUT_WAIT_FOR_NOT_BUSY,      EV_DOUT_COMPLETE,     dout_check_busy},

    {ST_DOUT_WAIT_FOR_STOP,          EV_DOUT_STOPPED,      dout_reset},

    {ST_DOUT_WAIT_FOR_RESET,         EV_DOUT_RESETED,      dout_reseted},
};

void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg)
{
    struct st5481_adapter *adapter = hisax_d_if->priv;
    struct sk_buff *skb = arg;

    switch (pr) {
    case PH_ACTIVATE | REQUEST:
        FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL);
        break;
    case PH_DEACTIVATE | REQUEST:
        FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL);
        break;
    case PH_DATA | REQUEST:
        DBG(2, "PH_DATA REQUEST len %d", skb->len);
        BUG_ON(adapter->d_out.tx_skb);
        adapter->d_out.tx_skb = skb;
        FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL);
        break;
    default:
        WARNING("pr %#x\n", pr);
        break;
    }
}

/* ======================================================================
 */

/*
 * Start receiving on the D channel since entered state F7.
 */
static void ph_connect(struct st5481_adapter *adapter)
{
    struct st5481_d_out *d_out = &adapter->d_out;
    struct st5481_in *d_in = &adapter->d_in;

    DBG(8, "");

    FsmChangeState(&d_out->fsm, ST_DOUT_NONE);

    //  st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL);
    st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL);
    st5481_in_mode(d_in, L1_MODE_HDLC);

#ifdef LOOPBACK
    // Turn loopback on (data sent on B and D looped back)
    st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL);
#endif

    st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL);

    // Turn on the green LED to tell that we are in state F7
    adapter->leds |= GREEN_LED;
    st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
}

/*
 * Stop receiving on the D channel since not in state F7.
 */
static void ph_disconnect(struct st5481_adapter *adapter)
{
    DBG(8, "");

    st5481_in_mode(&adapter->d_in, L1_MODE_NULL);

    // Turn off the green LED to tell that we left state F7
    adapter->leds &= ~GREEN_LED;
    st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
}

static int st5481_setup_d_out(struct st5481_adapter *adapter)
{
    struct usb_device *dev = adapter->usb_dev;
    struct usb_interface *intf;
    struct usb_host_interface *altsetting = NULL;
    struct usb_host_endpoint *endpoint;
    struct st5481_d_out *d_out = &adapter->d_out;

    DBG(2, "");

    intf = usb_ifnum_to_if(dev, 0);
    if (intf)
        altsetting = usb_altnum_to_altsetting(intf, 3);
    if (!altsetting)
        return -ENXIO;

    // Allocate URBs and buffers for the D channel out
    endpoint = &altsetting->endpoint[EP_D_OUT-1];

    DBG(2, "endpoint address=%02x,packet size=%d",
        endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));

    return st5481_setup_isocpipes(d_out->urb, dev,
                      usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
                      NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT,
                      NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT,
                      usb_d_out_complete, adapter);
}

static void st5481_release_d_out(struct st5481_adapter *adapter)
{
    struct st5481_d_out *d_out = &adapter->d_out;

    DBG(2, "");

    st5481_release_isocpipes(d_out->urb);
}

int st5481_setup_d(struct st5481_adapter *adapter)
{
    int retval;

    DBG(2, "");

    retval = st5481_setup_d_out(adapter);
    if (retval)
        goto err;
    adapter->d_in.bufsize = MAX_DFRAME_LEN_L1;
    adapter->d_in.num_packets = NUM_ISO_PACKETS_D;
    adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN;
    adapter->d_in.ep = EP_D_IN | USB_DIR_IN;
    adapter->d_in.counter = IN_D_COUNTER;
    adapter->d_in.adapter = adapter;
    adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc;
    retval = st5481_setup_in(&adapter->d_in);
    if (retval)
        goto err_d_out;

    adapter->l1m.fsm = &l1fsm;
    adapter->l1m.state = ST_L1_F3;
    adapter->l1m.debug = st5481_debug & 0x100;
    adapter->l1m.userdata = adapter;
    adapter->l1m.printdebug = l1m_debug;
    FsmInitTimer(&adapter->l1m, &adapter->timer);

    adapter->d_out.fsm.fsm = &dout_fsm;
    adapter->d_out.fsm.state = ST_DOUT_NONE;
    adapter->d_out.fsm.debug = st5481_debug & 0x100;
    adapter->d_out.fsm.userdata = adapter;
    adapter->d_out.fsm.printdebug = dout_debug;

    return 0;

err_d_out:
    st5481_release_d_out(adapter);
err:
    return retval;
}

void st5481_release_d(struct st5481_adapter *adapter)
{
    DBG(2, "");

    st5481_release_in(&adapter->d_in);
    st5481_release_d_out(adapter);
}

/* ======================================================================
 * init / exit
 */

int __init st5481_d_init(void)
{
    int retval;

    l1fsm.state_count = L1_STATE_COUNT;
    l1fsm.event_count = L1_EVENT_COUNT;
    l1fsm.strEvent = strL1Event;
    l1fsm.strState = strL1State;
    retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList));
    if (retval)
        goto err;

    dout_fsm.state_count = DOUT_STATE_COUNT;
    dout_fsm.event_count = DOUT_EVENT_COUNT;
    dout_fsm.strEvent = strDoutEvent;
    dout_fsm.strState = strDoutState;
    retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList));
    if (retval)
        goto err_l1;

    return 0;

err_l1:
    FsmFree(&l1fsm);
err:
    return retval;
}

// can't be __exit
void st5481_d_exit(void)
{
    FsmFree(&l1fsm);
    FsmFree(&dout_fsm);
}