[linux-2.6-block.git] / drivers / net / ethernet / amd / 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/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/io.h>
#include <asm/pgtable.h>

#include "hplance.h"

/* We have 16392 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, it takes (8 + 2) * 1544 bytes.
 */
#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 hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent);
static void hplance_init(struct net_device *dev, struct dio_dev *d);
static void 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    = hplance_remove_one,
};

static const struct net_device_ops hplance_netdev_ops = {
	.ndo_open		= hplance_open,
	.ndo_stop		= hplance_close,
	.ndo_start_xmit		= lance_start_xmit,
	.ndo_set_rx_mode	= lance_set_multicast,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= lance_poll,
#endif
};

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

	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 %pM, irq %d\n",
	       dev->name, d->name, d->scode, dev->dev_addr, 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 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 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->netdev_ops = &hplance_netdev_ops;
	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 = d->name;
	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;
}

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

static 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>
1da177e4 LT	13	#include <linux/string.h>
	14	#include <linux/delay.h>
	15	#include <linux/init.h>
	16	#include <linux/errno.h>
	17	/* Used for the temporal inet entries and routing */
	18	#include <linux/socket.h>
	19	#include <linux/route.h>
	20	#include <linux/dio.h>
	21	#include <linux/netdevice.h>
	22	#include <linux/etherdevice.h>
	23	#include <linux/skbuff.h>
	24
1da177e4 LT	25	#include <asm/io.h>
	26	#include <asm/pgtable.h>
	27
	28	#include "hplance.h"
	29
78c8dbb6	30	/* We have 16392 bytes of RAM for the init block and buffers. This places
1da177e4	31	* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
78c8dbb6	32	* buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
1da177e4 LT	33	*/
	34	#define LANCE_LOG_TX_BUFFERS 1
	35	#define LANCE_LOG_RX_BUFFERS 3
	36
	37	#include "7990.h" /* use generic LANCE code */
	38
	39	/* Our private data structure */
	40	struct hplance_private {
	41	struct lance_private lance;
	42	};
	43
	44	/* function prototypes... This is easy because all the grot is in the
	45	* generic LANCE support. All we have to support is probing for boards,
6aa20a22	46	* plus board-specific init, open and close actions.
1da177e4 LT	47	* Oh, and we need to tell the generic code how to read and write LANCE registers...
1da177e4 LT	48	*/
1dd06ae8 GKH	49	static int hplance_init_one(struct dio_dev d, const struct dio_device_id ent);
1dd06ae8 GKH	50	static void hplance_init(struct net_device dev, struct dio_dev d);
0cb0568d	51	static void hplance_remove_one(struct dio_dev *d);
1da177e4 LT	52	static void hplance_writerap(void *priv, unsigned short value);
	53	static void hplance_writerdp(void *priv, unsigned short value);
	54	static unsigned short hplance_readrdp(void *priv);
	55	static int hplance_open(struct net_device *dev);
	56	static int hplance_close(struct net_device *dev);
	57
	58	static struct dio_device_id hplance_dio_tbl[] = {
	59	{ DIO_ID_LAN },
	60	{ 0 }
	61	};
	62
	63	static struct dio_driver hplance_driver = {
	64	.name = "hplance",
	65	.id_table = hplance_dio_tbl,
	66	.probe = hplance_init_one,
0cb0568d	67	.remove = hplance_remove_one,
1da177e4 LT	68	};
1da177e4 LT	69
2e303a92 AB	70	static const struct net_device_ops hplance_netdev_ops = {
	71	.ndo_open = hplance_open,
	72	.ndo_stop = hplance_close,
	73	.ndo_start_xmit = lance_start_xmit,
afc4b13d	74	.ndo_set_rx_mode = lance_set_multicast,
2e303a92 AB	75	.ndo_change_mtu = eth_change_mtu,
	76	.ndo_validate_addr = eth_validate_addr,
	77	.ndo_set_mac_address = eth_mac_addr,
	78	#ifdef CONFIG_NET_POLL_CONTROLLER
	79	.ndo_poll_controller = lance_poll,
	80	#endif
	81	};
	82
1da177e4	83	/* Find all the HP Lance boards and initialise them... */
1dd06ae8	84	static int hplance_init_one(struct dio_dev d, const struct dio_device_id ent)
1da177e4 LT	85	{
	86	struct net_device *dev;
	87	int err = -ENOMEM;
	88
	89	dev = alloc_etherdev(sizeof(struct hplance_private));
	90	if (!dev)
	91	goto out;
	92
	93	err = -EBUSY;
	94	if (!request_mem_region(dio_resource_start(d),
	95	dio_resource_len(d), d->name))
	96	goto out_free_netdev;
	97
	98	hplance_init(dev, d);
	99	err = register_netdev(dev);
	100	if (err)
	101	goto out_release_mem_region;
	102
	103	dio_set_drvdata(d, dev);
8e8858e9	104
f27fd499 DK	105	printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
f27fd499 DK	106	dev->name, d->name, d->scode, dev->dev_addr, d->ipl);
8e8858e9	107
1da177e4 LT	108	return 0;
	109
	110	out_release_mem_region:
	111	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	112	out_free_netdev:
	113	free_netdev(dev);
	114	out:
	115	return err;
	116	}
	117
0cb0568d	118	static void hplance_remove_one(struct dio_dev *d)
1da177e4 LT	119	{
	120	struct net_device *dev = dio_get_drvdata(d);
	121
	122	unregister_netdev(dev);
	123	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	124	free_netdev(dev);
	125	}
	126
	127	/* Initialise a single lance board at the given DIO device */
0cb0568d	128	static void hplance_init(struct net_device dev, struct dio_dev d)
1da177e4	129	{
a8ab77a8 GU	130	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
	131	struct hplance_private *lp;
	132	int i;
	133
	134	/* reset the board */
	135	out_8(va + DIO_IDOFF, 0xff);
	136	udelay(100); /* ariba! ariba! udelay! udelay! */
	137
	138	/* Fill the dev fields */
	139	dev->base_addr = va;
	140	dev->netdev_ops = &hplance_netdev_ops;
	141	dev->dma = 0;
	142
	143	for (i = 0; i < 6; i++) {
	144	/* The NVRAM holds our ethernet address, one nibble per byte,
	145	* at bytes NVRAMOFF+1,3,5,7,9...
	146	*/
	147	dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
	148	\| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
	149	}
	150
	151	lp = netdev_priv(dev);
4ffa8fcd	152	lp->lance.name = d->name;
a8ab77a8 GU	153	lp->lance.base = va;
	154	lp->lance.init_block = (struct lance_init_block )(va + HPLANCE_MEMOFF); / CPU addr */
	155	lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
	156	lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
	157	lp->lance.irq = d->ipl;
	158	lp->lance.writerap = hplance_writerap;
	159	lp->lance.writerdp = hplance_writerdp;
	160	lp->lance.readrdp = hplance_readrdp;
	161	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
	162	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
	163	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
	164	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
1da177e4 LT	165	}
	166
	167	/* This is disgusting. We have to check the DIO status register for ack every
	168	* time we read or write the LANCE registers.
	169	*/
	170	static void hplance_writerap(void *priv, unsigned short value)
	171	{
	172	struct lance_private lp = (struct lance_private )priv;
	173	do {
	174	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	175	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	176	}
	177
	178	static void hplance_writerdp(void *priv, unsigned short value)
	179	{
	180	struct lance_private lp = (struct lance_private )priv;
	181	do {
	182	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	183	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	184	}
	185
	186	static unsigned short hplance_readrdp(void *priv)
	187	{
	188	struct lance_private lp = (struct lance_private )priv;
	189	__u16 value;
	190	do {
	191	value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	192	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	193	return value;
	194	}
	195
	196	static int hplance_open(struct net_device *dev)
	197	{
a8ab77a8 GU	198	int status;
a8ab77a8 GU	199	struct lance_private *lp = netdev_priv(dev);
6aa20a22	200
a8ab77a8 GU	201	status = lance_open(dev); /* call generic lance open code */
	202	if (status)
	203	return status;
	204	/* enable interrupts at board level. */
	205	out_8(lp->base + HPLANCE_STATUS, LE_IE);
1da177e4	206
a8ab77a8	207	return 0;
1da177e4 LT	208	}
	209
	210	static int hplance_close(struct net_device *dev)
	211	{
a8ab77a8	212	struct lance_private *lp = netdev_priv(dev);
1da177e4	213
a8ab77a8 GU	214	out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
	215	lance_close(dev);
	216	return 0;
1da177e4 LT	217	}
1da177e4 LT	218
0b114078	219	static int __init hplance_init_module(void)
1da177e4	220	{
e51c01b0	221	return dio_register_driver(&hplance_driver);
1da177e4 LT	222	}
1da177e4 LT	223
0b114078	224	static void __exit hplance_cleanup_module(void)
1da177e4	225	{
a8ab77a8	226	dio_unregister_driver(&hplance_driver);
1da177e4 LT	227	}
	228
	229	module_init(hplance_init_module);
	230	module_exit(hplance_cleanup_module);
	231
	232	MODULE_LICENSE("GPL");