[deliverable/linux.git] / drivers / net / wan / sealevel.c

/*
 *	Sealevel Systems 4021 driver.
 *
 *	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 of the License, or (at your option) any later version.
 *
 *	(c) Copyright 1999, 2001 Alan Cox
 *	(c) Copyright 2001 Red Hat Inc.
 *	Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/hdlc.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <net/arp.h>

#include <asm/irq.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include "z85230.h"


struct slvl_device
{
	struct z8530_channel *chan;
	int channel;
};


struct slvl_board
{
	struct slvl_device dev[2];
	struct z8530_dev board;
	int iobase;
};

/*
 *	Network driver support routines
 */

static inline struct slvl_device* dev_to_chan(struct net_device *dev)
{
	return (struct slvl_device *)dev_to_hdlc(dev)->priv;
}

/*
 *	Frame receive. Simple for our card as we do HDLC and there
 *	is no funny garbage involved
 */

static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
{
	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
	skb_trim(skb, skb->len - 2);
	skb->protocol = hdlc_type_trans(skb, c->netdevice);
	skb_reset_mac_header(skb);
	skb->dev = c->netdevice;
	netif_rx(skb);
}

/*
 *	We've been placed in the UP state
 */

static int sealevel_open(struct net_device *d)
{
	struct slvl_device *slvl = dev_to_chan(d);
	int err = -1;
	int unit = slvl->channel;

	/*
	 *	Link layer up.
	 */

	switch (unit)
	{
		case 0:
			err = z8530_sync_dma_open(d, slvl->chan);
			break;
		case 1:
			err = z8530_sync_open(d, slvl->chan);
			break;
	}

	if (err)
		return err;

	err = hdlc_open(d);
	if (err) {
		switch (unit) {
			case 0:
				z8530_sync_dma_close(d, slvl->chan);
				break;
			case 1:
				z8530_sync_close(d, slvl->chan);
				break;
		}
		return err;
	}

	slvl->chan->rx_function = sealevel_input;

	/*
	 *	Go go go
	 */
	netif_start_queue(d);
	return 0;
}

static int sealevel_close(struct net_device *d)
{
	struct slvl_device *slvl = dev_to_chan(d);
	int unit = slvl->channel;

	/*
	 *	Discard new frames
	 */

	slvl->chan->rx_function = z8530_null_rx;

	hdlc_close(d);
	netif_stop_queue(d);

	switch (unit)
	{
		case 0:
			z8530_sync_dma_close(d, slvl->chan);
			break;
		case 1:
			z8530_sync_close(d, slvl->chan);
			break;
	}
	return 0;
}

static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
{
	/* struct slvl_device *slvl=dev_to_chan(d);
	   z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
	return hdlc_ioctl(d, ifr, cmd);
}

/*
 *	Passed network frames, fire them downwind.
 */

static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
					     struct net_device *d)
{
	return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
}

static int sealevel_attach(struct net_device *dev, unsigned short encoding,
			   unsigned short parity)
{
	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
		return 0;
	return -EINVAL;
}

static const struct net_device_ops sealevel_ops = {
	.ndo_open       = sealevel_open,
	.ndo_stop       = sealevel_close,
	.ndo_change_mtu = hdlc_change_mtu,
	.ndo_start_xmit = hdlc_start_xmit,
	.ndo_do_ioctl   = sealevel_ioctl,
};

static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
{
	struct net_device *dev = alloc_hdlcdev(sv);
	if (!dev)
		return -1;

	dev_to_hdlc(dev)->attach = sealevel_attach;
	dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
	dev->netdev_ops = &sealevel_ops;
	dev->base_addr = iobase;
	dev->irq = irq;

	if (register_hdlc_device(dev)) {
		printk(KERN_ERR "sealevel: unable to register HDLC device\n");
		free_netdev(dev);
		return -1;
	}

	sv->chan->netdevice = dev;
	return 0;
}


/*
 *	Allocate and setup Sealevel board.
 */

static __init struct slvl_board *slvl_init(int iobase, int irq,
					   int txdma, int rxdma, int slow)
{
	struct z8530_dev *dev;
	struct slvl_board *b;

	/*
	 *	Get the needed I/O space
	 */

	if (!request_region(iobase, 8, "Sealevel 4021")) {
		printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n",
		       iobase);
		return NULL;
	}

	b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
	if (!b)
		goto err_kzalloc;

	b->dev[0].chan = &b->board.chanA;
	b->dev[0].channel = 0;

	b->dev[1].chan = &b->board.chanB;
	b->dev[1].channel = 1;

	dev = &b->board;

	/*
	 *	Stuff in the I/O addressing
	 */

	dev->active = 0;

	b->iobase = iobase;

	/*
	 *	Select 8530 delays for the old board
	 */

	if (slow)
		iobase |= Z8530_PORT_SLEEP;

	dev->chanA.ctrlio = iobase + 1;
	dev->chanA.dataio = iobase;
	dev->chanB.ctrlio = iobase + 3;
	dev->chanB.dataio = iobase + 2;

	dev->chanA.irqs = &z8530_nop;
	dev->chanB.irqs = &z8530_nop;

	/*
	 *	Assert DTR enable DMA
	 */

	outb(3 | (1 << 7), b->iobase + 4);


	/* We want a fast IRQ for this device. Actually we'd like an even faster
	   IRQ ;) - This is one driver RtLinux is made for */

	if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
			"SeaLevel", dev) < 0) {
		printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq);
		goto err_request_irq;
	}

	dev->irq = irq;
	dev->chanA.private = &b->dev[0];
	dev->chanB.private = &b->dev[1];
	dev->chanA.dev = dev;
	dev->chanB.dev = dev;

	dev->chanA.txdma = 3;
	dev->chanA.rxdma = 1;
	if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
		goto err_dma_tx;

	if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
		goto err_dma_rx;

	disable_irq(irq);

	/*
	 *	Begin normal initialise
	 */

	if (z8530_init(dev) != 0) {
		printk(KERN_ERR "Z8530 series device not found.\n");
		enable_irq(irq);
		goto free_hw;
	}
	if (dev->type == Z85C30) {
		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
	} else {
		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
	}

	/*
	 *	Now we can take the IRQ
	 */

	enable_irq(irq);

	if (slvl_setup(&b->dev[0], iobase, irq))
		goto free_hw;
	if (slvl_setup(&b->dev[1], iobase, irq))
		goto free_netdev0;

	z8530_describe(dev, "I/O", iobase);
	dev->active = 1;
	return b;

free_netdev0:
	unregister_hdlc_device(b->dev[0].chan->netdevice);
	free_netdev(b->dev[0].chan->netdevice);
free_hw:
	free_dma(dev->chanA.rxdma);
err_dma_rx:
	free_dma(dev->chanA.txdma);
err_dma_tx:
	free_irq(irq, dev);
err_request_irq:
	kfree(b);
err_kzalloc:
	release_region(iobase, 8);
	return NULL;
}

static void __exit slvl_shutdown(struct slvl_board *b)
{
	int u;

	z8530_shutdown(&b->board);

	for (u = 0; u < 2; u++)
	{
		struct net_device *d = b->dev[u].chan->netdevice;
		unregister_hdlc_device(d);
		free_netdev(d);
	}

	free_irq(b->board.irq, &b->board);
	free_dma(b->board.chanA.rxdma);
	free_dma(b->board.chanA.txdma);
	/* DMA off on the card, drop DTR */
	outb(0, b->iobase);
	release_region(b->iobase, 8);
	kfree(b);
}


static int io=0x238;
static int txdma=1;
static int rxdma=3;
static int irq=5;
static int slow=0;

module_param(io, int, 0);
MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
module_param(txdma, int, 0);
MODULE_PARM_DESC(txdma, "Transmit DMA channel");
module_param(rxdma, int, 0);
MODULE_PARM_DESC(rxdma, "Receive DMA channel");
module_param(irq, int, 0);
MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
module_param(slow, bool, 0);
MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");

MODULE_AUTHOR("Alan Cox");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");

static struct slvl_board *slvl_unit;

static int __init slvl_init_module(void)
{
	slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);

	return slvl_unit ? 0 : -ENODEV;
}

static void __exit slvl_cleanup_module(void)
{
	if(slvl_unit)
		slvl_shutdown(slvl_unit);
}

module_init(slvl_init_module);
module_exit(slvl_cleanup_module);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Sealevel Systems 4021 driver.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* (c) Copyright 1999, 2001 Alan Cox
	10	* (c) Copyright 2001 Red Hat Inc.
52e8a6a2	11	* Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
1da177e4 LT	12	*
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
	17	#include <linux/mm.h>
	18	#include <linux/net.h>
	19	#include <linux/skbuff.h>
	20	#include <linux/netdevice.h>
	21	#include <linux/if_arp.h>
	22	#include <linux/delay.h>
52e8a6a2	23	#include <linux/hdlc.h>
1da177e4 LT	24	#include <linux/ioport.h>
	25	#include <linux/init.h>
	26	#include <net/arp.h>
	27
82729971	28	#include <asm/irq.h>
1da177e4 LT	29	#include <asm/io.h>
	30	#include <asm/dma.h>
	31	#include <asm/byteorder.h>
1da177e4 LT	32	#include "z85230.h"
	33
	34
	35	struct slvl_device
	36	{
1da177e4	37	struct z8530_channel *chan;
1da177e4 LT	38	int channel;
	39	};
	40
	41
	42	struct slvl_board
	43	{
52e8a6a2	44	struct slvl_device dev[2];
1da177e4 LT	45	struct z8530_dev board;
	46	int iobase;
	47	};
	48
	49	/*
	50	* Network driver support routines
	51	*/
	52
52e8a6a2 KH	53	static inline struct slvl_device* dev_to_chan(struct net_device *dev)
	54	{
	55	return (struct slvl_device *)dev_to_hdlc(dev)->priv;
	56	}
	57
1da177e4	58	/*
52e8a6a2	59	* Frame receive. Simple for our card as we do HDLC and there
1da177e4 LT	60	* is no funny garbage involved
1da177e4 LT	61	*/
52e8a6a2	62
1da177e4 LT	63	static void sealevel_input(struct z8530_channel c, struct sk_buff skb)
	64	{
	65	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
52e8a6a2 KH	66	skb_trim(skb, skb->len - 2);
52e8a6a2 KH	67	skb->protocol = hdlc_type_trans(skb, c->netdevice);
98e399f8	68	skb_reset_mac_header(skb);
52e8a6a2	69	skb->dev = c->netdevice;
1da177e4	70	netif_rx(skb);
1da177e4	71	}
52e8a6a2	72
1da177e4 LT	73	/*
1da177e4 LT	74	* We've been placed in the UP state
52e8a6a2 KH	75	*/
52e8a6a2 KH	76
1da177e4 LT	77	static int sealevel_open(struct net_device *d)
1da177e4 LT	78	{
52e8a6a2	79	struct slvl_device *slvl = dev_to_chan(d);
1da177e4 LT	80	int err = -1;
1da177e4 LT	81	int unit = slvl->channel;
52e8a6a2	82
1da177e4	83	/*
52e8a6a2	84	* Link layer up.
1da177e4 LT	85	*/
1da177e4 LT	86
52e8a6a2	87	switch (unit)
1da177e4 LT	88	{
1da177e4 LT	89	case 0:
52e8a6a2	90	err = z8530_sync_dma_open(d, slvl->chan);
1da177e4 LT	91	break;
1da177e4 LT	92	case 1:
52e8a6a2	93	err = z8530_sync_open(d, slvl->chan);
1da177e4 LT	94	break;
1da177e4 LT	95	}
52e8a6a2 KH	96
52e8a6a2 KH	97	if (err)
1da177e4	98	return err;
52e8a6a2 KH	99
	100	err = hdlc_open(d);
	101	if (err) {
	102	switch (unit) {
1da177e4 LT	103	case 0:
	104	z8530_sync_dma_close(d, slvl->chan);
	105	break;
	106	case 1:
	107	z8530_sync_close(d, slvl->chan);
	108	break;
52e8a6a2	109	}
1da177e4 LT	110	return err;
1da177e4 LT	111	}
52e8a6a2 KH	112
	113	slvl->chan->rx_function = sealevel_input;
	114
1da177e4 LT	115	/*
	116	* Go go go
	117	*/
	118	netif_start_queue(d);
	119	return 0;
	120	}
	121
	122	static int sealevel_close(struct net_device *d)
	123	{
52e8a6a2	124	struct slvl_device *slvl = dev_to_chan(d);
1da177e4	125	int unit = slvl->channel;
52e8a6a2	126
1da177e4 LT	127	/*
	128	* Discard new frames
	129	*/
1da177e4	130
52e8a6a2 KH	131	slvl->chan->rx_function = z8530_null_rx;
	132
	133	hdlc_close(d);
1da177e4	134	netif_stop_queue(d);
52e8a6a2 KH	135
52e8a6a2 KH	136	switch (unit)
1da177e4 LT	137	{
	138	case 0:
	139	z8530_sync_dma_close(d, slvl->chan);
	140	break;
	141	case 1:
	142	z8530_sync_close(d, slvl->chan);
	143	break;
	144	}
	145	return 0;
	146	}
	147
	148	static int sealevel_ioctl(struct net_device d, struct ifreq ifr, int cmd)
	149	{
52e8a6a2	150	/* struct slvl_device *slvl=dev_to_chan(d);
1da177e4	151	z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
52e8a6a2	152	return hdlc_ioctl(d, ifr, cmd);
1da177e4 LT	153	}
	154
	155	/*
52e8a6a2	156	* Passed network frames, fire them downwind.
1da177e4	157	*/
52e8a6a2	158
d71a6749 SH	159	static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
d71a6749 SH	160	struct net_device *d)
1da177e4	161	{
52e8a6a2	162	return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
1da177e4 LT	163	}
1da177e4 LT	164
52e8a6a2 KH	165	static int sealevel_attach(struct net_device *dev, unsigned short encoding,
52e8a6a2 KH	166	unsigned short parity)
1da177e4	167	{
52e8a6a2 KH	168	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
	169	return 0;
	170	return -EINVAL;
1da177e4 LT	171	}
1da177e4 LT	172
991990a1 KH	173	static const struct net_device_ops sealevel_ops = {
	174	.ndo_open = sealevel_open,
	175	.ndo_stop = sealevel_close,
	176	.ndo_change_mtu = hdlc_change_mtu,
	177	.ndo_start_xmit = hdlc_start_xmit,
	178	.ndo_do_ioctl = sealevel_ioctl,
	179	};
	180
52e8a6a2	181	static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
1da177e4	182	{
52e8a6a2 KH	183	struct net_device *dev = alloc_hdlcdev(sv);
	184	if (!dev)
	185	return -1;
	186
	187	dev_to_hdlc(dev)->attach = sealevel_attach;
	188	dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
991990a1	189	dev->netdev_ops = &sealevel_ops;
52e8a6a2 KH	190	dev->base_addr = iobase;
	191	dev->irq = irq;
	192
	193	if (register_hdlc_device(dev)) {
	194	printk(KERN_ERR "sealevel: unable to register HDLC device\n");
	195	free_netdev(dev);
	196	return -1;
1da177e4	197	}
1da177e4	198
52e8a6a2	199	sv->chan->netdevice = dev;
1da177e4 LT	200	return 0;
	201	}
	202
1da177e4 LT	203
	204	/*
	205	* Allocate and setup Sealevel board.
	206	*/
52e8a6a2 KH	207
52e8a6a2 KH	208	static __init struct slvl_board *slvl_init(int iobase, int irq,
1da177e4 LT	209	int txdma, int rxdma, int slow)
	210	{
	211	struct z8530_dev *dev;
	212	struct slvl_board *b;
52e8a6a2	213
1da177e4 LT	214	/*
	215	* Get the needed I/O space
	216	*/
	217
52e8a6a2 KH	218	if (!request_region(iobase, 8, "Sealevel 4021")) {
	219	printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n",
	220	iobase);
1da177e4 LT	221	return NULL;
1da177e4 LT	222	}
1da177e4	223
52e8a6a2 KH	224	b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
	225	if (!b)
	226	goto err_kzalloc;
1da177e4	227
52e8a6a2 KH	228	b->dev[0].chan = &b->board.chanA;
52e8a6a2 KH	229	b->dev[0].channel = 0;
1da177e4	230
52e8a6a2 KH	231	b->dev[1].chan = &b->board.chanB;
52e8a6a2 KH	232	b->dev[1].channel = 1;
1da177e4 LT	233
1da177e4 LT	234	dev = &b->board;
52e8a6a2	235
1da177e4 LT	236	/*
	237	* Stuff in the I/O addressing
	238	*/
52e8a6a2	239
1da177e4 LT	240	dev->active = 0;
	241
	242	b->iobase = iobase;
52e8a6a2	243
1da177e4 LT	244	/*
	245	* Select 8530 delays for the old board
	246	*/
52e8a6a2 KH	247
52e8a6a2 KH	248	if (slow)
1da177e4	249	iobase \|= Z8530_PORT_SLEEP;
52e8a6a2 KH	250
	251	dev->chanA.ctrlio = iobase + 1;
	252	dev->chanA.dataio = iobase;
	253	dev->chanB.ctrlio = iobase + 3;
	254	dev->chanB.dataio = iobase + 2;
	255
	256	dev->chanA.irqs = &z8530_nop;
	257	dev->chanB.irqs = &z8530_nop;
	258
1da177e4 LT	259	/*
	260	* Assert DTR enable DMA
	261	*/
52e8a6a2 KH	262
	263	outb(3 \| (1 << 7), b->iobase + 4);
	264
1da177e4 LT	265
	266	/* We want a fast IRQ for this device. Actually we'd like an even faster
	267	IRQ ;) - This is one driver RtLinux is made for */
52e8a6a2	268
a0607fd3	269	if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
52e8a6a2	270	"SeaLevel", dev) < 0) {
1da177e4	271	printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq);
52e8a6a2	272	goto err_request_irq;
1da177e4	273	}
52e8a6a2 KH	274
	275	dev->irq = irq;
	276	dev->chanA.private = &b->dev[0];
	277	dev->chanB.private = &b->dev[1];
	278	dev->chanA.dev = dev;
	279	dev->chanB.dev = dev;
	280
	281	dev->chanA.txdma = 3;
	282	dev->chanA.rxdma = 1;
	283	if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
	284	goto err_dma_tx;
	285
	286	if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
	287	goto err_dma_rx;
	288
1da177e4	289	disable_irq(irq);
52e8a6a2	290
1da177e4 LT	291	/*
	292	* Begin normal initialise
	293	*/
52e8a6a2 KH	294
52e8a6a2 KH	295	if (z8530_init(dev) != 0) {
1da177e4 LT	296	printk(KERN_ERR "Z8530 series device not found.\n");
1da177e4 LT	297	enable_irq(irq);
52e8a6a2	298	goto free_hw;
1da177e4	299	}
52e8a6a2	300	if (dev->type == Z85C30) {
1da177e4 LT	301	z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
1da177e4 LT	302	z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
52e8a6a2	303	} else {
1da177e4 LT	304	z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
	305	z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
	306	}
	307
	308	/*
	309	* Now we can take the IRQ
	310	*/
52e8a6a2	311
1da177e4 LT	312	enable_irq(irq);
1da177e4 LT	313
52e8a6a2 KH	314	if (slvl_setup(&b->dev[0], iobase, irq))
	315	goto free_hw;
	316	if (slvl_setup(&b->dev[1], iobase, irq))
	317	goto free_netdev0;
1da177e4 LT	318
1da177e4 LT	319	z8530_describe(dev, "I/O", iobase);
52e8a6a2	320	dev->active = 1;
1da177e4 LT	321	return b;
1da177e4 LT	322
52e8a6a2 KH	323	free_netdev0:
	324	unregister_hdlc_device(b->dev[0].chan->netdevice);
	325	free_netdev(b->dev[0].chan->netdevice);
	326	free_hw:
1da177e4	327	free_dma(dev->chanA.rxdma);
52e8a6a2	328	err_dma_rx:
1da177e4	329	free_dma(dev->chanA.txdma);
52e8a6a2	330	err_dma_tx:
1da177e4	331	free_irq(irq, dev);
52e8a6a2	332	err_request_irq:
1da177e4	333	kfree(b);
52e8a6a2 KH	334	err_kzalloc:
52e8a6a2 KH	335	release_region(iobase, 8);
1da177e4 LT	336	return NULL;
	337	}
	338
	339	static void __exit slvl_shutdown(struct slvl_board *b)
	340	{
	341	int u;
	342
	343	z8530_shutdown(&b->board);
52e8a6a2 KH	344
52e8a6a2 KH	345	for (u = 0; u < 2; u++)
1da177e4	346	{
52e8a6a2 KH	347	struct net_device *d = b->dev[u].chan->netdevice;
52e8a6a2 KH	348	unregister_hdlc_device(d);
1da177e4 LT	349	free_netdev(d);
1da177e4 LT	350	}
52e8a6a2	351
1da177e4 LT	352	free_irq(b->board.irq, &b->board);
	353	free_dma(b->board.chanA.rxdma);
	354	free_dma(b->board.chanA.txdma);
	355	/* DMA off on the card, drop DTR */
	356	outb(0, b->iobase);
	357	release_region(b->iobase, 8);
	358	kfree(b);
	359	}
	360
	361
	362	static int io=0x238;
	363	static int txdma=1;
	364	static int rxdma=3;
	365	static int irq=5;
	366	static int slow=0;
	367
	368	module_param(io, int, 0);
	369	MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
	370	module_param(txdma, int, 0);
	371	MODULE_PARM_DESC(txdma, "Transmit DMA channel");
	372	module_param(rxdma, int, 0);
	373	MODULE_PARM_DESC(rxdma, "Receive DMA channel");
	374	module_param(irq, int, 0);
	375	MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
	376	module_param(slow, bool, 0);
	377	MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
	378
	379	MODULE_AUTHOR("Alan Cox");
	380	MODULE_LICENSE("GPL");
	381	MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
	382
	383	static struct slvl_board *slvl_unit;
	384
	385	static int __init slvl_init_module(void)
	386	{
1da177e4 LT	387	slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
	388
	389	return slvl_unit ? 0 : -ENODEV;
	390	}
	391
	392	static void __exit slvl_cleanup_module(void)
	393	{
	394	if(slvl_unit)
	395	slvl_shutdown(slvl_unit);
	396	}
	397
	398	module_init(slvl_init_module);
	399	module_exit(slvl_cleanup_module);