[linux-2.6-block.git] / drivers / net / hplance.c

/* hplance.c  : the  Linux/hp300/lance ethernet driver
 *
 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
 * Based on the Sun Lance driver and the NetBSD HP Lance driver
 * Uses the generic 7990.c LANCE code.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/errno.h>
/* Used for the temporal inet entries and routing */
#include <linux/socket.h>
#include <linux/route.h>
#include <linux/dio.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>

#include "hplance.h"

/* We have 16834 bytes of RAM for the init block and buffers. This places
 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
 * buffers and 2 Tx buffers.
 */
#define LANCE_LOG_TX_BUFFERS 1
#define LANCE_LOG_RX_BUFFERS 3

#include "7990.h"                                 /* use generic LANCE code */

/* Our private data structure */
struct hplance_private {
	struct lance_private lance;
};

/* function prototypes... This is easy because all the grot is in the
 * generic LANCE support. All we have to support is probing for boards,
 * plus board-specific init, open and close actions.
 * Oh, and we need to tell the generic code how to read and write LANCE registers...
 */
static int __devinit hplance_init_one(struct dio_dev *d,
				const struct dio_device_id *ent);
static void __devinit hplance_init(struct net_device *dev,
				struct dio_dev *d);
static void __devexit hplance_remove_one(struct dio_dev *d);
static void hplance_writerap(void *priv, unsigned short value);
static void hplance_writerdp(void *priv, unsigned short value);
static unsigned short hplance_readrdp(void *priv);
static int hplance_open(struct net_device *dev);
static int hplance_close(struct net_device *dev);

static struct dio_device_id hplance_dio_tbl[] = {
	{ DIO_ID_LAN },
	{ 0 }
};

static struct dio_driver hplance_driver = {
	.name      = "hplance",
	.id_table  = hplance_dio_tbl,
	.probe     = hplance_init_one,
	.remove    = __devexit_p(hplance_remove_one),
};

/* Find all the HP Lance boards and initialise them... */
static int __devinit hplance_init_one(struct dio_dev *d,
				const struct dio_device_id *ent)
{
	struct net_device *dev;
	int err = -ENOMEM;
	int i;

	dev = alloc_etherdev(sizeof(struct hplance_private));
	if (!dev)
		goto out;

	err = -EBUSY;
	if (!request_mem_region(dio_resource_start(d),
				dio_resource_len(d), d->name))
		goto out_free_netdev;

	hplance_init(dev, d);
	err = register_netdev(dev);
	if (err)
		goto out_release_mem_region;

	dio_set_drvdata(d, dev);

	printk(KERN_INFO "%s: %s; select code %d, addr %2.2x", dev->name, d->name, d->scode, dev->dev_addr[0]);

	for (i=1; i<6; i++) {
		printk(":%2.2x", dev->dev_addr[i]);
	}

	printk(", irq %d\n", d->ipl);

	return 0;

 out_release_mem_region:
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
 out_free_netdev:
	free_netdev(dev);
 out:
	return err;
}

static void __devexit hplance_remove_one(struct dio_dev *d)
{
	struct net_device *dev = dio_get_drvdata(d);

	unregister_netdev(dev);
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	free_netdev(dev);
}

/* Initialise a single lance board at the given DIO device */
static void __init hplance_init(struct net_device *dev, struct dio_dev *d)
{
        unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
        struct hplance_private *lp;
        int i;

        /* reset the board */
        out_8(va+DIO_IDOFF, 0xff);
        udelay(100);                              /* ariba! ariba! udelay! udelay! */

        /* Fill the dev fields */
        dev->base_addr = va;
        dev->open = &hplance_open;
        dev->stop = &hplance_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
        dev->poll_controller = lance_poll;
#endif
        dev->hard_start_xmit = &lance_start_xmit;
        dev->get_stats = &lance_get_stats;
        dev->set_multicast_list = &lance_set_multicast;
        dev->dma = 0;

        for (i=0; i<6; i++) {
                /* The NVRAM holds our ethernet address, one nibble per byte,
                 * at bytes NVRAMOFF+1,3,5,7,9...
                 */
                dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
                        | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
        }

        lp = netdev_priv(dev);
        lp->lance.name = (char*)d->name;                /* discards const, shut up gcc */
        lp->lance.base = va;
        lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
        lp->lance.lance_init_block = NULL;              /* LANCE addr of same RAM */
        lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
        lp->lance.irq = d->ipl;
        lp->lance.writerap = hplance_writerap;
        lp->lance.writerdp = hplance_writerdp;
        lp->lance.readrdp = hplance_readrdp;
        lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
        lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
        lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
        lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
}

/* This is disgusting. We have to check the DIO status register for ack every
 * time we read or write the LANCE registers.
 */
static void hplance_writerap(void *priv, unsigned short value)
{
	struct lance_private *lp = (struct lance_private *)priv;
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static void hplance_writerdp(void *priv, unsigned short value)
{
	struct lance_private *lp = (struct lance_private *)priv;
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static unsigned short hplance_readrdp(void *priv)
{
	struct lance_private *lp = (struct lance_private *)priv;
	__u16 value;
	do {
		value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	return value;
}

static int hplance_open(struct net_device *dev)
{
        int status;
        struct lance_private *lp = netdev_priv(dev);

        status = lance_open(dev);                 /* call generic lance open code */
        if (status)
                return status;
        /* enable interrupts at board level. */
        out_8(lp->base + HPLANCE_STATUS, LE_IE);

        return 0;
}

static int hplance_close(struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);

        out_8(lp->base + HPLANCE_STATUS, 0);	/* disable interrupts at boardlevel */
        lance_close(dev);
        return 0;
}

int __init hplance_init_module(void)
{
	return dio_register_driver(&hplance_driver);
}

void __exit hplance_cleanup_module(void)
{
        dio_unregister_driver(&hplance_driver);
}

module_init(hplance_init_module);
module_exit(hplance_cleanup_module);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* hplance.c : the Linux/hp300/lance ethernet driver
	2	*
	3	* Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
	4	* Based on the Sun Lance driver and the NetBSD HP Lance driver
	5	* Uses the generic 7990.c LANCE code.
	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
	10	#include <linux/types.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/ioport.h>
	13	#include <linux/slab.h>
	14	#include <linux/string.h>
	15	#include <linux/delay.h>
	16	#include <linux/init.h>
	17	#include <linux/errno.h>
	18	/* Used for the temporal inet entries and routing */
	19	#include <linux/socket.h>
	20	#include <linux/route.h>
	21	#include <linux/dio.h>
	22	#include <linux/netdevice.h>
	23	#include <linux/etherdevice.h>
	24	#include <linux/skbuff.h>
	25
	26	#include <asm/system.h>
	27	#include <asm/io.h>
	28	#include <asm/pgtable.h>
	29
	30	#include "hplance.h"
	31
	32	/* We have 16834 bytes of RAM for the init block and buffers. This places
	33	* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
	34	* buffers and 2 Tx buffers.
	35	*/
	36	#define LANCE_LOG_TX_BUFFERS 1
	37	#define LANCE_LOG_RX_BUFFERS 3
	38
	39	#include "7990.h" /* use generic LANCE code */
	40
	41	/* Our private data structure */
	42	struct hplance_private {
	43	struct lance_private lance;
	44	};
	45
	46	/* function prototypes... This is easy because all the grot is in the
	47	* generic LANCE support. All we have to support is probing for boards,
6aa20a22	48	* plus board-specific init, open and close actions.
1da177e4 LT	49	* Oh, and we need to tell the generic code how to read and write LANCE registers...
	50	*/
	51	static int __devinit hplance_init_one(struct dio_dev *d,
	52	const struct dio_device_id *ent);
6aa20a22	53	static void __devinit hplance_init(struct net_device *dev,
1da177e4 LT	54	struct dio_dev *d);
	55	static void __devexit hplance_remove_one(struct dio_dev *d);
	56	static void hplance_writerap(void *priv, unsigned short value);
	57	static void hplance_writerdp(void *priv, unsigned short value);
	58	static unsigned short hplance_readrdp(void *priv);
	59	static int hplance_open(struct net_device *dev);
	60	static int hplance_close(struct net_device *dev);
	61
	62	static struct dio_device_id hplance_dio_tbl[] = {
	63	{ DIO_ID_LAN },
	64	{ 0 }
	65	};
	66
	67	static struct dio_driver hplance_driver = {
	68	.name = "hplance",
	69	.id_table = hplance_dio_tbl,
	70	.probe = hplance_init_one,
	71	.remove = __devexit_p(hplance_remove_one),
	72	};
	73
	74	/* Find all the HP Lance boards and initialise them... */
	75	static int __devinit hplance_init_one(struct dio_dev *d,
	76	const struct dio_device_id *ent)
	77	{
	78	struct net_device *dev;
	79	int err = -ENOMEM;
8e8858e9	80	int i;
1da177e4 LT	81
	82	dev = alloc_etherdev(sizeof(struct hplance_private));
	83	if (!dev)
	84	goto out;
	85
	86	err = -EBUSY;
	87	if (!request_mem_region(dio_resource_start(d),
	88	dio_resource_len(d), d->name))
	89	goto out_free_netdev;
	90
	91	hplance_init(dev, d);
	92	err = register_netdev(dev);
	93	if (err)
	94	goto out_release_mem_region;
	95
	96	dio_set_drvdata(d, dev);
8e8858e9 KJ	97
	98	printk(KERN_INFO "%s: %s; select code %d, addr %2.2x", dev->name, d->name, d->scode, dev->dev_addr[0]);
	99
	100	for (i=1; i<6; i++) {
	101	printk(":%2.2x", dev->dev_addr[i]);
	102	}
	103
	104	printk(", irq %d\n", d->ipl);
	105
1da177e4 LT	106	return 0;
	107
	108	out_release_mem_region:
	109	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	110	out_free_netdev:
	111	free_netdev(dev);
	112	out:
	113	return err;
	114	}
	115
	116	static void __devexit hplance_remove_one(struct dio_dev *d)
	117	{
	118	struct net_device *dev = dio_get_drvdata(d);
	119
	120	unregister_netdev(dev);
	121	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	122	free_netdev(dev);
	123	}
	124
	125	/* Initialise a single lance board at the given DIO device */
	126	static void __init hplance_init(struct net_device dev, struct dio_dev d)
	127	{
	128	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
	129	struct hplance_private *lp;
	130	int i;
6aa20a22	131
1da177e4 LT	132	/* reset the board */
	133	out_8(va+DIO_IDOFF, 0xff);
	134	udelay(100); /* ariba! ariba! udelay! udelay! */
	135
	136	/* Fill the dev fields */
	137	dev->base_addr = va;
	138	dev->open = &hplance_open;
	139	dev->stop = &hplance_close;
	140	#ifdef CONFIG_NET_POLL_CONTROLLER
	141	dev->poll_controller = lance_poll;
	142	#endif
	143	dev->hard_start_xmit = &lance_start_xmit;
	144	dev->get_stats = &lance_get_stats;
	145	dev->set_multicast_list = &lance_set_multicast;
	146	dev->dma = 0;
6aa20a22	147
1da177e4 LT	148	for (i=0; i<6; i++) {
	149	/* The NVRAM holds our ethernet address, one nibble per byte,
	150	* at bytes NVRAMOFF+1,3,5,7,9...
	151	*/
	152	dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
	153	\| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
1da177e4	154	}
6aa20a22	155
1da177e4 LT	156	lp = netdev_priv(dev);
	157	lp->lance.name = (char)d->name; / discards const, shut up gcc */
	158	lp->lance.base = va;
	159	lp->lance.init_block = (struct lance_init_block )(va + HPLANCE_MEMOFF); / CPU addr */
a5d361fc	160	lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
1da177e4 LT	161	lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
	162	lp->lance.irq = d->ipl;
	163	lp->lance.writerap = hplance_writerap;
	164	lp->lance.writerdp = hplance_writerdp;
	165	lp->lance.readrdp = hplance_readrdp;
	166	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
	167	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
	168	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
	169	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
1da177e4 LT	170	}
	171
	172	/* This is disgusting. We have to check the DIO status register for ack every
	173	* time we read or write the LANCE registers.
	174	*/
	175	static void hplance_writerap(void *priv, unsigned short value)
	176	{
	177	struct lance_private lp = (struct lance_private )priv;
	178	do {
	179	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	180	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	181	}
	182
	183	static void hplance_writerdp(void *priv, unsigned short value)
	184	{
	185	struct lance_private lp = (struct lance_private )priv;
	186	do {
	187	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	188	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	189	}
	190
	191	static unsigned short hplance_readrdp(void *priv)
	192	{
	193	struct lance_private lp = (struct lance_private )priv;
	194	__u16 value;
	195	do {
	196	value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	197	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	198	return value;
	199	}
	200
	201	static int hplance_open(struct net_device *dev)
	202	{
	203	int status;
	204	struct lance_private *lp = netdev_priv(dev);
6aa20a22	205
1da177e4 LT	206	status = lance_open(dev); /* call generic lance open code */
	207	if (status)
	208	return status;
	209	/* enable interrupts at board level. */
	210	out_8(lp->base + HPLANCE_STATUS, LE_IE);
	211
	212	return 0;
	213	}
	214
	215	static int hplance_close(struct net_device *dev)
	216	{
	217	struct lance_private *lp = netdev_priv(dev);
	218
	219	out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
	220	lance_close(dev);
	221	return 0;
	222	}
	223
	224	int __init hplance_init_module(void)
	225	{
e51c01b0	226	return dio_register_driver(&hplance_driver);
1da177e4 LT	227	}
	228
	229	void __exit hplance_cleanup_module(void)
	230	{
	231	dio_unregister_driver(&hplance_driver);
	232	}
	233
	234	module_init(hplance_init_module);
	235	module_exit(hplance_cleanup_module);
	236
	237	MODULE_LICENSE("GPL");