/*
 * Function ircomm_tty_init()
 *
 *    Init IrCOMM TTY layer/driver
 *
 */
static int __init ircomm_tty_init(void)
{
	driver = alloc_tty_driver(IRCOMM_TTY_PORTS);
	if (!driver)
		return -ENOMEM;
	ircomm_tty = hashbin_new(HB_LOCK); 
	if (ircomm_tty == NULL) {
		IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
		put_tty_driver(driver);
		return -ENOMEM;
	}

	driver->owner		= THIS_MODULE;
	driver->driver_name     = "ircomm";
	driver->name            = "ircomm";
	driver->major           = IRCOMM_TTY_MAJOR;
	driver->minor_start     = IRCOMM_TTY_MINOR;
	driver->type            = TTY_DRIVER_TYPE_SERIAL;
	driver->subtype         = SERIAL_TYPE_NORMAL;
	driver->init_termios    = tty_std_termios;
	driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
	driver->flags           = TTY_DRIVER_REAL_RAW;
	tty_set_operations(driver, &ops);
	if (tty_register_driver(driver)) {
		IRDA_ERROR("%s(): Couldn't register serial driver\n",
			   __FUNCTION__);
		put_tty_driver(driver);
		return -1;
	}
	return 0;
}

int sirdev_schedule_request(struct sir_dev *dev, int initial_state, unsigned param)
{
	struct sir_fsm *fsm = &dev->fsm;

	IRDA_DEBUG(2, "%s - state=0x%04x / param=%u\n", __func__,
			initial_state, param);

	if (down_trylock(&fsm->sem)) {
		if (in_interrupt()  ||  in_atomic()  ||  irqs_disabled()) {
			IRDA_DEBUG(1, "%s(), state machine busy!\n", __func__);
			return -EWOULDBLOCK;
		} else
			down(&fsm->sem);
	}

	if (fsm->state == SIRDEV_STATE_DEAD) {
		/* race with sirdev_close should never happen */
		IRDA_ERROR("%s(), instance staled!\n", __func__);
		up(&fsm->sem);
		return -ESTALE;		/* or better EPIPE? */
	}

	netif_stop_queue(dev->netdev);
	atomic_set(&dev->enable_rx, 0);

	fsm->state = initial_state;
	fsm->param = param;
	fsm->result = 0;

	INIT_DELAYED_WORK(&fsm->work, sirdev_config_fsm);
	queue_delayed_work(irda_sir_wq, &fsm->work, 0);
	return 0;
}

static int sirdev_tx_complete_fsm(struct sir_dev *dev)
{
	struct sir_fsm *fsm = &dev->fsm;
	unsigned next_state, delay;
	unsigned bytes_left;

	do {
		next_state = fsm->substate;	/* default: stay in current substate */
		delay = 0;

		switch(fsm->substate) {

		case SIRDEV_STATE_WAIT_XMIT:
			if (dev->drv->chars_in_buffer)
				bytes_left = dev->drv->chars_in_buffer(dev);
			else
				bytes_left = 0;
			if (!bytes_left) {
				next_state = SIRDEV_STATE_WAIT_UNTIL_SENT;
				break;
			}

			if (dev->speed > 115200)
				delay = (bytes_left*8*10000) / (dev->speed/100);
			else if (dev->speed > 0)
				delay = (bytes_left*10*10000) / (dev->speed/100);
			else
				delay = 0;
			/* expected delay (usec) until remaining bytes are sent */
			if (delay < 100) {
				udelay(delay);
				delay = 0;
				break;
			}
			/* sleep some longer delay (msec) */
			delay = (delay+999) / 1000;
			break;

		case SIRDEV_STATE_WAIT_UNTIL_SENT:
			/* block until underlaying hardware buffer are empty */
			if (dev->drv->wait_until_sent)
				dev->drv->wait_until_sent(dev);
			next_state = SIRDEV_STATE_TX_DONE;
			break;

		case SIRDEV_STATE_TX_DONE:
			return 0;

		default:
			IRDA_ERROR("%s - undefined state\n", __func__);
			return -EINVAL;
		}
		fsm->substate = next_state;
	} while (delay == 0);
	return delay;
}

static int girbil_reset(struct sir_dev *dev)
{
    unsigned state = dev->fsm.substate;
    unsigned delay = 0;
    u8 control = GIRBIL_TXEN | GIRBIL_RXEN;
    int ret = 0;

    IRDA_DEBUG(2, "%s()\n", __FUNCTION__);

    switch (state) {
    case SIRDEV_STATE_DONGLE_RESET:
        /* Reset dongle */
        sirdev_set_dtr_rts(dev, TRUE, FALSE);
        /* Sleep at least 5 ms */
        delay = 20;
        state = GIRBIL_STATE_WAIT1_RESET;
        break;

    case GIRBIL_STATE_WAIT1_RESET:
        /* Set DTR and clear RTS to enter command mode */
        sirdev_set_dtr_rts(dev, FALSE, TRUE);
        delay = 20;
        state = GIRBIL_STATE_WAIT2_RESET;
        break;

    case GIRBIL_STATE_WAIT2_RESET:
        /* Write control byte */
        sirdev_raw_write(dev, &control, 1);
        delay = 20;
        state = GIRBIL_STATE_WAIT3_RESET;
        break;

    case GIRBIL_STATE_WAIT3_RESET:
        /* Go back to normal mode */
        sirdev_set_dtr_rts(dev, TRUE, TRUE);
        dev->speed = 9600;
        break;

    default:
        IRDA_ERROR("%s(), undefined state %d\n", __FUNCTION__, state);
        ret = -1;
        break;
    }
    dev->fsm.substate = state;
    return (delay > 0) ? delay : ret;
}

int __init irttp_init(void)
{
	irttp = kzalloc(sizeof(struct irttp_cb), GFP_KERNEL);
	if (irttp == NULL)
		return -ENOMEM;

	irttp->magic = TTP_MAGIC;

	irttp->tsaps = hashbin_new(HB_LOCK);
	if (!irttp->tsaps) {
		IRDA_ERROR("%s: can't allocate IrTTP hashbin!\n",
			   __func__);
		kfree(irttp);
		return -ENOMEM;
	}

	return 0;
}

/*
 * Function irda_device_is_receiving (dev)
 *
 *    Check if the device driver is currently receiving data
 *
 */
int irda_device_is_receiving(struct net_device *dev)
{
	struct if_irda_req req;
	int ret;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__);

	if (!dev->do_ioctl) {
		IRDA_ERROR("%s: do_ioctl not impl. by device driver\n",
			   __FUNCTION__);
		return -1;
	}

	ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCGRECEIVING);
	if (ret < 0)
		return ret;

	return req.ifr_receiving;
}

static int __init ircomm_init(void)
{
	ircomm = hashbin_new(HB_LOCK);
	if (ircomm == NULL) {
		IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
		return -ENOMEM;
	}

#ifdef CONFIG_PROC_FS
	{ struct proc_dir_entry *ent;
	ent = create_proc_entry("ircomm", 0, proc_irda);
	if (ent)
		ent->proc_fops = &ircomm_proc_fops;
	}
#endif /* CONFIG_PROC_FS */

	IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n");

	return 0;
}

static int mcp2120_reset(struct sir_dev *dev)
{
	unsigned state = dev->fsm.substate;
	unsigned delay = 0;
	int ret = 0;

	IRDA_DEBUG(2, "%s()\n", __func__);

	switch (state) {
	case SIRDEV_STATE_DONGLE_RESET:
;
		/* Reset dongle by setting RTS*/
		sirdev_set_dtr_rts(dev, TRUE, TRUE);
		state = MCP2120_STATE_WAIT1_RESET;
		delay = 50;
		break;

	case MCP2120_STATE_WAIT1_RESET:
;
                /* clear RTS and wait for at least 30 ms. */
		sirdev_set_dtr_rts(dev, FALSE, FALSE);
		state = MCP2120_STATE_WAIT2_RESET;
		delay = 50;
		break;

	case MCP2120_STATE_WAIT2_RESET:
;
		/* Go back to normal mode */
		sirdev_set_dtr_rts(dev, FALSE, FALSE);
		break;

	default:
		IRDA_ERROR("%s(), undefined state %d\n", __func__, state);
		ret = -EINVAL;
		break;
	}
	dev->fsm.substate = state;
	return (delay > 0) ? delay : ret;
}

static int __init ircomm_init(void)
{
    ircomm = hashbin_new(HB_LOCK);
    if (ircomm == NULL) {
        IRDA_ERROR("%s(), can't allocate hashbin!\n", __func__);
        return -ENOMEM;
    }

#ifdef CONFIG_PROC_FS
    {   struct proc_dir_entry *ent;
        ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops);
        if (!ent) {
            printk(KERN_ERR "ircomm_init: can't create /proc entry!\n");
            return -ENODEV;
        }
    }
#endif

    IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n");

    return 0;
}

static int mcp2120_change_speed(struct sir_dev *dev, unsigned speed)
{
	unsigned state = dev->fsm.substate;
	unsigned delay = 0;
	u8 control[2];
	static int ret = 0;

	IRDA_DEBUG(2, "%s()\n", __func__);

	switch (state) {
	case SIRDEV_STATE_DONGLE_SPEED:
		/* Set DTR to enter command mode */
		sirdev_set_dtr_rts(dev, TRUE, FALSE);
                udelay(500);

		ret = 0;
		switch (speed) {
		default:
			speed = 9600;
			ret = -EINVAL;
			/* fall through */
		case 9600:
			control[0] = MCP2120_9600;
;
			break;
		case 19200:
			control[0] = MCP2120_19200;
;
			break;
		case 34800:
			control[0] = MCP2120_38400;
;
			break;
		case 57600:
			control[0] = MCP2120_57600;
;
			break;
		case 115200:
                        control[0] = MCP2120_115200;
;
			break;
		}
		control[1] = MCP2120_COMMIT;
	
		/* Write control bytes */
		sirdev_raw_write(dev, control, 2);
		dev->speed = speed;

		state = MCP2120_STATE_WAIT_SPEED;
		delay = 100;
;
		break;

	case MCP2120_STATE_WAIT_SPEED:
		/* Go back to normal mode */
		sirdev_set_dtr_rts(dev, FALSE, FALSE);
;
		break;

	default:
		IRDA_ERROR("%s(), undefine state %d\n", __func__, state);
		ret = -EINVAL;
		break;
	}
	dev->fsm.substate = state;
	return (delay > 0) ? delay : ret;
}

//.........这里部分代码省略.........
		case SIRDEV_STATE_SET_SPEED:
			fsm->substate = SIRDEV_STATE_WAIT_XMIT;
			next_state = SIRDEV_STATE_DONGLE_CHECK;
			break;

		case SIRDEV_STATE_DONGLE_CHECK:
			ret = sirdev_tx_complete_fsm(dev);
			if (ret < 0) {
				fsm->result = ret;
				next_state = SIRDEV_STATE_ERROR;
				break;
			}
			if ((delay=ret) != 0)
				break;

			if (dev->dongle_drv) {
				fsm->substate = SIRDEV_STATE_DONGLE_RESET;
				next_state = SIRDEV_STATE_DONGLE_RESET;
			}
			else {
				dev->speed = fsm->param;
				next_state = SIRDEV_STATE_PORT_SPEED;
			}
			break;

		case SIRDEV_STATE_DONGLE_RESET:
			if (dev->dongle_drv->reset) {
				ret = dev->dongle_drv->reset(dev);
				if (ret < 0) {
					fsm->result = ret;
					next_state = SIRDEV_STATE_ERROR;
					break;
				}
			}
			else
				ret = 0;
			if ((delay=ret) == 0) {
				/* set serial port according to dongle default speed */
				if (dev->drv->set_speed)
					dev->drv->set_speed(dev, dev->speed);
				fsm->substate = SIRDEV_STATE_DONGLE_SPEED;
				next_state = SIRDEV_STATE_DONGLE_SPEED;
			}
			break;

		case SIRDEV_STATE_DONGLE_SPEED:
			if (dev->dongle_drv->set_speed) {
				ret = dev->dongle_drv->set_speed(dev, fsm->param);
				if (ret < 0) {
					fsm->result = ret;
					next_state = SIRDEV_STATE_ERROR;
					break;
				}
			}
			else
				ret = 0;
			if ((delay=ret) == 0)
				next_state = SIRDEV_STATE_PORT_SPEED;
			break;

		case SIRDEV_STATE_PORT_SPEED:
			/* Finally we are ready to change the serial port speed */
			if (dev->drv->set_speed)
				dev->drv->set_speed(dev, dev->speed);
			dev->new_speed = 0;
			next_state = SIRDEV_STATE_DONE;
			break;

		case SIRDEV_STATE_DONE:
			/* Signal network layer so it can send more frames */
			netif_wake_queue(dev->netdev);
			next_state = SIRDEV_STATE_COMPLETE;
			break;

		default:
			IRDA_ERROR("%s - undefined state\n", __func__);
			fsm->result = -EINVAL;
			/* fall thru */

		case SIRDEV_STATE_ERROR:
			IRDA_ERROR("%s - error: %d\n", __func__, fsm->result);

#if 0	/* don't enable this before we have netdev->tx_timeout to recover */
			netif_stop_queue(dev->netdev);
#else
			netif_wake_queue(dev->netdev);
#endif
			/* fall thru */

		case SIRDEV_STATE_COMPLETE:
			/* config change finished, so we are not busy any longer */
			sirdev_enable_rx(dev);
			up(&fsm->sem);
			return;
		}
		fsm->state = next_state;
	} while(!delay);

	queue_delayed_work(irda_sir_wq, &fsm->work, msecs_to_jiffies(delay));
}

/*
 * Function async_wrap (skb, *tx_buff, buffsize)
 *
 *    Makes a new buffer with wrapping and stuffing, should check that
 *    we don't get tx buffer overflow.
 */
int async_wrap_skb(struct sk_buff *skb, __u8 *tx_buff, int buffsize)
{
	struct irda_skb_cb *cb = (struct irda_skb_cb *) skb->cb;
	int xbofs;
	int i;
	int n;
	union {
		__u16 value;
		__u8 bytes[2];
	} fcs;

	/* Initialize variables */
	fcs.value = INIT_FCS;
	n = 0;

	/*
	 *  Send  XBOF's for required min. turn time and for the negotiated
	 *  additional XBOFS
	 */

	if (cb->magic != LAP_MAGIC) {
		/*
		 * This will happen for all frames sent from user-space.
		 * Nothing to worry about, but we set the default number of
		 * BOF's
		 */
		IRDA_DEBUG(1, "%s(), wrong magic in skb!\n", __FUNCTION__);
		xbofs = 10;
	} else
		xbofs = cb->xbofs + cb->xbofs_delay;

	IRDA_DEBUG(4, "%s(), xbofs=%d\n", __FUNCTION__, xbofs);

	/* Check that we never use more than 115 + 48 xbofs */
	if (xbofs > 163) {
		IRDA_DEBUG(0, "%s(), too many xbofs (%d)\n", __FUNCTION__,
			   xbofs);
		xbofs = 163;
	}

	memset(tx_buff + n, XBOF, xbofs);
	n += xbofs;

	/* Start of packet character BOF */
	tx_buff[n++] = BOF;

	/* Insert frame and calc CRC */
	for (i=0; i < skb->len; i++) {
		/*
		 *  Check for the possibility of tx buffer overflow. We use
		 *  bufsize-5 since the maximum number of bytes that can be
		 *  transmitted after this point is 5.
		 */
		if(n >= (buffsize-5)) {
			IRDA_ERROR("%s(), tx buffer overflow (n=%d)\n",
				   __FUNCTION__, n);
			return n;
		}

		n += stuff_byte(skb->data[i], tx_buff+n);
		fcs.value = irda_fcs(fcs.value, skb->data[i]);
	}

	/* Insert CRC in little endian format (LSB first) */
	fcs.value = ~fcs.value;
#ifdef __LITTLE_ENDIAN
	n += stuff_byte(fcs.bytes[0], tx_buff+n);
	n += stuff_byte(fcs.bytes[1], tx_buff+n);
#else /* ifdef __BIG_ENDIAN */
	n += stuff_byte(fcs.bytes[1], tx_buff+n);
	n += stuff_byte(fcs.bytes[0], tx_buff+n);
#endif
	tx_buff[n++] = EOF;

	return n;
}

static struct irport_cb *
irport_open(int i, unsigned int iobase, unsigned int irq)
{
	struct net_device *dev;
	struct irport_cb *self;

	IRDA_DEBUG(1, "%s()\n", __FUNCTION__);

	/* Lock the port that we need */
	if (!request_region(iobase, IO_EXTENT, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
			   __FUNCTION__, iobase);
		goto err_out1;
	}

	/*
	 *  Allocate new instance of the driver
	 */
	dev = alloc_irdadev(sizeof(struct irport_cb));
	if (!dev) {
		IRDA_ERROR("%s(), can't allocate memory for "
			   "irda device!\n", __FUNCTION__);
		goto err_out2;
	}

	self = dev->priv;
	spin_lock_init(&self->lock);

	/* Need to store self somewhere */
	dev_self[i] = self;
	self->priv = self;
	self->index = i;

	/* Initialize IO */
	self->io.sir_base  = iobase;
        self->io.sir_ext   = IO_EXTENT;
        self->io.irq       = irq;
        self->io.fifo_size = 16;		/* 16550A and compatible */

	/* Initialize QoS for this device */
	irda_init_max_qos_capabilies(&self->qos);
	
	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
		IR_115200;

	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);
	
	/* Bootstrap ZeroCopy Rx */
	self->rx_buff.truesize = IRDA_SKB_MAX_MTU;
	self->rx_buff.skb = __dev_alloc_skb(self->rx_buff.truesize,
					    GFP_KERNEL);
	if (self->rx_buff.skb == NULL) {
		IRDA_ERROR("%s(), can't allocate memory for "
			   "receive buffer!\n", __FUNCTION__);
		goto err_out3;
	}
	skb_reserve(self->rx_buff.skb, 1);
	self->rx_buff.head = self->rx_buff.skb->data;
	/* No need to memset the buffer, unless you are really pedantic */

	/* Finish setup the Rx buffer descriptor */
	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->rx_buff.data = self->rx_buff.head;

	/* Specify how much memory we want */
	self->tx_buff.truesize = 4000;
	
	/* Allocate memory if needed */
	if (self->tx_buff.truesize > 0) {
		self->tx_buff.head = kzalloc(self->tx_buff.truesize,
						      GFP_KERNEL);
		if (self->tx_buff.head == NULL) {
			IRDA_ERROR("%s(), can't allocate memory for "
				   "transmit buffer!\n", __FUNCTION__);
			goto err_out4;
		}
	}	
	self->tx_buff.data = self->tx_buff.head;

	self->netdev = dev;
	/* Keep track of module usage */
	SET_MODULE_OWNER(dev);

	/* May be overridden by piggyback drivers */
	self->interrupt    = irport_interrupt;
	self->change_speed = irport_change_speed;

	/* Override the network functions we need to use */
	dev->hard_start_xmit = irport_hard_xmit;
	dev->tx_timeout	     = irport_timeout;
	dev->watchdog_timeo  = HZ;  /* Allow time enough for speed change */
	dev->open            = irport_net_open;
	dev->stop            = irport_net_close;
	dev->get_stats	     = irport_net_get_stats;
	dev->do_ioctl        = irport_net_ioctl;

	/* Make ifconfig display some details */
	dev->base_addr = iobase;
//.........这里部分代码省略.........

static int w83977af_open(int i, unsigned int iobase, unsigned int irq,
			 unsigned int dma)
{
	struct net_device *dev;
        struct w83977af_ir *self;
	int err;

	IRDA_DEBUG(0, "%s()\n", __func__ );

	
	if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
		      __func__ , iobase);
		return -ENODEV;
	}

	if (w83977af_probe(iobase, irq, dma) == -1) {
		err = -1;
		goto err_out;
	}
	dev = alloc_irdadev(sizeof(struct w83977af_ir));
	if (dev == NULL) {
		printk( KERN_ERR "IrDA: Can't allocate memory for "
			"IrDA control block!\n");
		err = -ENOMEM;
		goto err_out;
	}

	self = netdev_priv(dev);
	spin_lock_init(&self->lock);
   

	
	self->io.fir_base   = iobase;
        self->io.irq       = irq;
        self->io.fir_ext   = CHIP_IO_EXTENT;
        self->io.dma       = dma;
        self->io.fifo_size = 32;

	
	irda_init_max_qos_capabilies(&self->qos);
	
	

	
	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
		IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);

	
	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);
	
	
	self->rx_buff.truesize = 14384; 
	self->tx_buff.truesize = 4000;
	
	
	self->rx_buff.head =
		dma_alloc_coherent(NULL, self->rx_buff.truesize,
				   &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out1;
	}

	memset(self->rx_buff.head, 0, self->rx_buff.truesize);
	
	self->tx_buff.head =
		dma_alloc_coherent(NULL, self->tx_buff.truesize,
				   &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out2;
	}
	memset(self->tx_buff.head, 0, self->tx_buff.truesize);

	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->tx_buff.data = self->tx_buff.head;
	self->rx_buff.data = self->rx_buff.head;
	self->netdev = dev;

	dev->netdev_ops	= &w83977_netdev_ops;

	err = register_netdev(dev);
	if (err) {
		IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__);
		goto err_out3;
	}
	IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);

	
	dev_self[i] = self;
	
	return 0;
err_out3:
	dma_free_coherent(NULL, self->tx_buff.truesize,
			  self->tx_buff.head, self->tx_buff_dma);
err_out2:	
	dma_free_coherent(NULL, self->rx_buff.truesize,
//.........这里部分代码省略.........

static int __init nsc_ircc_open(chipio_t *info)
{
	struct net_device *dev;
	struct nsc_ircc_cb *self;
	void *ret;
	int err, chip_index;

	IRDA_DEBUG(2, "%s()\n", __func__);


 	for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
		if (!dev_self[chip_index])
			break;
	}

	if (chip_index == ARRAY_SIZE(dev_self)) {
		IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__);
		return -ENOMEM;
	}

	IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
		     info->cfg_base);

	if ((nsc_ircc_setup(info)) == -1)
		return -1;

	IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);

	dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
	if (dev == NULL) {
		IRDA_ERROR("%s(), can't allocate memory for "
			   "control block!\n", __func__);
		return -ENOMEM;
	}

	self = netdev_priv(dev);
	self->netdev = dev;
	spin_lock_init(&self->lock);
   
	
	dev_self[chip_index] = self;
	self->index = chip_index;

	
	self->io.cfg_base  = info->cfg_base;
	self->io.fir_base  = info->fir_base;
        self->io.irq       = info->irq;
        self->io.fir_ext   = CHIP_IO_EXTENT;
        self->io.dma       = info->dma;
        self->io.fifo_size = 32;
	
	
	ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
	if (!ret) {
		IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
			     __func__, self->io.fir_base);
		err = -ENODEV;
		goto out1;
	}

	
	irda_init_max_qos_capabilies(&self->qos);
	
	
	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
		IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
	
	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);
	
	
	self->rx_buff.truesize = 14384; 
	self->tx_buff.truesize = 14384;

	
	self->rx_buff.head =
		dma_alloc_coherent(NULL, self->rx_buff.truesize,
				   &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		err = -ENOMEM;
		goto out2;

	}
	memset(self->rx_buff.head, 0, self->rx_buff.truesize);
	
	self->tx_buff.head =
		dma_alloc_coherent(NULL, self->tx_buff.truesize,
				   &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		err = -ENOMEM;
		goto out3;
	}
	memset(self->tx_buff.head, 0, self->tx_buff.truesize);

	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->tx_buff.data = self->tx_buff.head;
	self->rx_buff.data = self->rx_buff.head;
	
	
//.........这里部分代码省略.........

static int __init nsc_ircc_init(void)
{
	chipio_t info;
	nsc_chip_t *chip;
	int ret;
	int cfg_base;
	int cfg, id;
	int reg;
	int i = 0;

	ret = platform_driver_register(&nsc_ircc_driver);
        if (ret) {
                IRDA_ERROR("%s, Can't register driver!\n", driver_name);
                return ret;
        }

 	
	ret = pnp_register_driver(&nsc_ircc_pnp_driver);

 	if (!ret)
 		pnp_registered = 1;

	ret = -ENODEV;

	
	for (chip = chips; chip->name ; chip++) {
		IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__,
			   chip->name);
		
		
		for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
			cfg_base = chip->cfg[cfg];
			if (!cfg_base)
				continue;

			
			reg = inb(cfg_base);
			if (reg == 0xff) {
				IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, cfg_base);
				continue;
			}
			
			
			outb(chip->cid_index, cfg_base);
			id = inb(cfg_base+1);
			if ((id & chip->cid_mask) == chip->cid_value) {
				IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
					   __func__, chip->name, id & ~chip->cid_mask);

				if (pnp_succeeded) {
					memset(&info, 0, sizeof(chipio_t));
					info.cfg_base = cfg_base;
					info.fir_base = pnp_info.fir_base;
					info.dma = pnp_info.dma;
					info.irq = pnp_info.irq;

					if (info.fir_base < 0x2000) {
						IRDA_MESSAGE("%s, chip->init\n", driver_name);
						chip->init(chip, &info);
					} else
						chip->probe(chip, &info);

					if (nsc_ircc_open(&info) >= 0)
						ret = 0;
				}

				if (ret) {
					IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
					memset(&info, 0, sizeof(chipio_t));
					info.cfg_base = cfg_base;
					info.fir_base = io[i];
					info.dma = dma[i];
					info.irq = irq[i];

					if (io[i] < 0x2000) {
						chip->init(chip, &info);
					} else
						chip->probe(chip, &info);

					if (nsc_ircc_open(&info) >= 0)
						ret = 0;
				}
				i++;
			} else {
				IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id);
			}
		} 
	}

	if (ret) {
		platform_driver_unregister(&nsc_ircc_driver);
		pnp_unregister_driver(&nsc_ircc_pnp_driver);
		pnp_registered = 0;
	}

	return ret;
}

static int tekram_change_speed(struct sir_dev *dev, unsigned speed)
{
	unsigned state = dev->fsm.substate;
	unsigned delay = 0;
	u8 byte;
	static int ret = 0;

	IRDA_DEBUG(2, "%s()\n", __func__);

	switch(state) {
	case SIRDEV_STATE_DONGLE_SPEED:

		switch (speed) {
		default:
			speed = 9600;
			ret = -EINVAL;
			/* fall thru */
		case 9600:
			byte = TEKRAM_PW|TEKRAM_9600;
			break;
		case 19200:
			byte = TEKRAM_PW|TEKRAM_19200;
			break;
		case 38400:
			byte = TEKRAM_PW|TEKRAM_38400;
			break;
		case 57600:
			byte = TEKRAM_PW|TEKRAM_57600;
			break;
		case 115200:
			byte = TEKRAM_115200;
			break;
		}

		/* Set DTR, Clear RTS */
		sirdev_set_dtr_rts(dev, TRUE, FALSE);

		/* Wait at least 7us */
		udelay(14);

		/* Write control byte */
		sirdev_raw_write(dev, &byte, 1);

		dev->speed = speed;

		state = TEKRAM_STATE_WAIT_SPEED;
		delay = tekram_delay;
		break;

	case TEKRAM_STATE_WAIT_SPEED:
		/* Set DTR, Set RTS */
		sirdev_set_dtr_rts(dev, TRUE, TRUE);
		udelay(50);
		break;

	default:
		IRDA_ERROR("%s - undefined state %d\n", __func__, state);
		ret = -EINVAL;
		break;
	}

	dev->fsm.substate = state;
	return (delay > 0) ? delay : ret;
}

void sirdev_write_complete(struct sir_dev *dev)
{
	unsigned long flags;
	struct sk_buff *skb;
	int actual = 0;
	int err;
	
	spin_lock_irqsave(&dev->tx_lock, flags);

	IRDA_DEBUG(3, "%s() - dev->tx_buff.len = %d\n",
		   __func__, dev->tx_buff.len);

	if (likely(dev->tx_buff.len > 0))  {
		/* Write data left in transmit buffer */
		actual = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);

		if (likely(actual>0)) {
			dev->tx_buff.data += actual;
			dev->tx_buff.len  -= actual;
		}
		else if (unlikely(actual<0)) {
			/* could be dropped later when we have tx_timeout to recover */
			IRDA_ERROR("%s: drv->do_write failed (%d)\n",
				   __func__, actual);
			if ((skb=dev->tx_skb) != NULL) {
				dev->tx_skb = NULL;
				dev_kfree_skb_any(skb);
				dev->netdev->stats.tx_errors++;
				dev->netdev->stats.tx_dropped++;
			}
			dev->tx_buff.len = 0;
		}
		if (dev->tx_buff.len > 0)
			goto done;	/* more data to send later */
	}

	if (unlikely(dev->raw_tx != 0)) {
		/* in raw mode we are just done now after the buffer was sent
		 * completely. Since this was requested by some dongle driver
		 * running under the control of the irda-thread we must take
		 * care here not to re-enable the queue. The queue will be
		 * restarted when the irda-thread has completed the request.
		 */

		IRDA_DEBUG(3, "%s(), raw-tx done\n", __func__);
		dev->raw_tx = 0;
		goto done;	/* no post-frame handling in raw mode */
	}

	/* we have finished now sending this skb.
	 * update statistics and free the skb.
	 * finally we check and trigger a pending speed change, if any.
	 * if not we switch to rx mode and wake the queue for further
	 * packets.
	 * note the scheduled speed request blocks until the lower
	 * client driver and the corresponding hardware has really
	 * finished sending all data (xmit fifo drained f.e.)
	 * before the speed change gets finally done and the queue
	 * re-activated.
	 */

	IRDA_DEBUG(5, "%s(), finished with frame!\n", __func__);
		
	if ((skb=dev->tx_skb) != NULL) {
		dev->tx_skb = NULL;
		dev->netdev->stats.tx_packets++;
		dev->netdev->stats.tx_bytes += skb->len;
		dev_kfree_skb_any(skb);
	}

	if (unlikely(dev->new_speed > 0)) {
		IRDA_DEBUG(5, "%s(), Changing speed!\n", __func__);
		err = sirdev_schedule_speed(dev, dev->new_speed);
		if (unlikely(err)) {
			/* should never happen
			 * forget the speed change and hope the stack recovers
			 */
			IRDA_ERROR("%s - schedule speed change failed: %d\n",
				   __func__, err);
			netif_wake_queue(dev->netdev);
		}
		/* else: success
		 *	speed change in progress now
		 *	on completion dev->new_speed gets cleared,
		 *	rx-reenabled and the queue restarted
		 */
	}
	else {
		sirdev_enable_rx(dev);
		netif_wake_queue(dev->netdev);
	}

done:
	spin_unlock_irqrestore(&dev->tx_lock, flags);
}

/*
 * Function w83977af_open (iobase, irq)
 *
 *    Open driver instance
 *
 */
static int w83977af_open(int i, unsigned int iobase, unsigned int irq,
			 unsigned int dma)
{
	struct net_device *dev;
        struct w83977af_ir *self;
	int err;

	IRDA_DEBUG(0, "%s()\n", __func__ );

	/* Lock the port that we need */
	if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
		      __func__ , iobase);
		return -ENODEV;
	}

	if (w83977af_probe(iobase, irq, dma) == -1) {
		err = -1;
		goto err_out;
	}
	/*
	 *  Allocate new instance of the driver
	 */
	dev = alloc_irdadev(sizeof(struct w83977af_ir));
	if (dev == NULL) {
		printk( KERN_ERR "IrDA: Can't allocate memory for "
			"IrDA control block!\n");
		err = -ENOMEM;
		goto err_out;
	}

	self = netdev_priv(dev);
	spin_lock_init(&self->lock);
   

	/* Initialize IO */
	self->io.fir_base   = iobase;
        self->io.irq       = irq;
        self->io.fir_ext   = CHIP_IO_EXTENT;
        self->io.dma       = dma;
        self->io.fifo_size = 32;

	/* Initialize QoS for this device */
	irda_init_max_qos_capabilies(&self->qos);
	
	/* The only value we must override it the baudrate */

	/* FIXME: The HP HDLS-1100 does not support 1152000! */
	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
		IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);

	/* The HP HDLS-1100 needs 1 ms according to the specs */
	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);
	
	/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
	self->rx_buff.truesize = 14384; 
	self->tx_buff.truesize = 4000;
	
	/* Allocate memory if needed */
	self->rx_buff.head =
		dma_alloc_coherent(NULL, self->rx_buff.truesize,
				   &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out1;
	}

	memset(self->rx_buff.head, 0, self->rx_buff.truesize);
	
	self->tx_buff.head =
		dma_alloc_coherent(NULL, self->tx_buff.truesize,
				   &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out2;
	}
	memset(self->tx_buff.head, 0, self->tx_buff.truesize);

	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->tx_buff.data = self->tx_buff.head;
	self->rx_buff.data = self->rx_buff.head;
	self->netdev = dev;

	dev->netdev_ops	= &w83977_netdev_ops;

	err = register_netdev(dev);
	if (err) {
		IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__);
		goto err_out3;
	}
	IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);

//.........这里部分代码省略.........

static int girbil_change_speed(struct sir_dev *dev, unsigned speed)
{
    unsigned state = dev->fsm.substate;
    unsigned delay = 0;
    u8 control[2];
    static int ret = 0;

    IRDA_DEBUG(2, "%s()\n", __FUNCTION__);

    /* dongle alread reset - port and dongle at default speed */

    switch(state) {

    case SIRDEV_STATE_DONGLE_SPEED:

        /* Set DTR and Clear RTS to enter command mode */
        sirdev_set_dtr_rts(dev, FALSE, TRUE);

        udelay(25);        /* better wait a little while */

        ret = 0;
        switch (speed) {
        default:
            ret = -EINVAL;
            /* fall through */
        case 9600:
            control[0] = GIRBIL_9600;
            break;
        case 19200:
            control[0] = GIRBIL_19200;
            break;
        case 34800:
            control[0] = GIRBIL_38400;
            break;
        case 57600:
            control[0] = GIRBIL_57600;
            break;
        case 115200:
            control[0] = GIRBIL_115200;
            break;
        }
        control[1] = GIRBIL_LOAD;
    
        /* Write control bytes */
        sirdev_raw_write(dev, control, 2);

        dev->speed = speed;

        state = GIRBIL_STATE_WAIT_SPEED;
        delay = 100;
        break;

    case GIRBIL_STATE_WAIT_SPEED:
        /* Go back to normal mode */
        sirdev_set_dtr_rts(dev, TRUE, TRUE);

        udelay(25);        /* better wait a little while */
        break;

    default:
        IRDA_ERROR("%s - undefined state %d\n", __FUNCTION__, state);
        ret = -EINVAL;
        break;
    }
    dev->fsm.substate = state;
    return (delay > 0) ? delay : ret;
}