[mirror_ubuntu-artful-kernel.git] / drivers / net / mvme147.c

/* mvme147.c  : the  Linux/mvme147/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/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.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 m147lance_private {
	struct lance_private lance;
	unsigned long ram;
};

/* 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 m147lance_open(struct net_device *dev);
static int m147lance_close(struct net_device *dev);
static void m147lance_writerap(struct lance_private *lp, unsigned short value);
static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
static unsigned short m147lance_readrdp(struct lance_private *lp);

typedef void (*writerap_t)(void *, unsigned short);
typedef void (*writerdp_t)(void *, unsigned short);
typedef unsigned short (*readrdp_t)(void *);

/* Initialise the one and only on-board 7990 */
struct net_device * __init mvme147lance_probe(int unit)
{
	struct net_device *dev;
	static int called;
	static const char name[] = "MVME147 LANCE";
	struct m147lance_private *lp;
	u_long *addr;
	u_long address;
	int err;
	DECLARE_MAC_BUF(mac);

	if (!MACH_IS_MVME147 || called)
		return ERR_PTR(-ENODEV);
	called++;

	dev = alloc_etherdev(sizeof(struct m147lance_private));
	if (!dev)
		return ERR_PTR(-ENOMEM);

	if (unit >= 0)
		sprintf(dev->name, "eth%d", unit);

	/* Fill the dev fields */
	dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
	dev->open = &m147lance_open;
	dev->stop = &m147lance_close;
	dev->hard_start_xmit = &lance_start_xmit;
	dev->set_multicast_list = &lance_set_multicast;
	dev->tx_timeout = &lance_tx_timeout;
	dev->dma = 0;

	addr=(u_long *)ETHERNET_ADDRESS;
	address = *addr;
	dev->dev_addr[0]=0x08;
	dev->dev_addr[1]=0x00;
	dev->dev_addr[2]=0x3e;
	address=address>>8;
	dev->dev_addr[5]=address&0xff;
	address=address>>8;
	dev->dev_addr[4]=address&0xff;
	address=address>>8;
	dev->dev_addr[3]=address&0xff;

	printk("%s: MVME147 at 0x%08lx, irq %d, "
	       "Hardware Address %s\n",
	       dev->name, dev->base_addr, MVME147_LANCE_IRQ,
	       print_mac(mac, dev->dev_addr));

	lp = (struct m147lance_private *)dev->priv;
	lp->ram = __get_dma_pages(GFP_ATOMIC, 3);	/* 16K */
	if (!lp->ram)
	{
		printk("%s: No memory for LANCE buffers\n", dev->name);
		free_netdev(dev);
		return ERR_PTR(-ENOMEM);
	}

	lp->lance.name = (char*)name;                   /* discards const, shut up gcc */
	lp->lance.base = dev->base_addr;
	lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
	lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram);                 /* LANCE addr of same RAM */
	lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
	lp->lance.irq = MVME147_LANCE_IRQ;
	lp->lance.writerap = (writerap_t)m147lance_writerap;
	lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
	lp->lance.readrdp = (readrdp_t)m147lance_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;

	err = register_netdev(dev);
	if (err) {
		free_pages(lp->ram, 3);
		free_netdev(dev);
		return ERR_PTR(err);
	}

	return dev;
}

static void m147lance_writerap(struct lance_private *lp, unsigned short value)
{
	out_be16(lp->base + LANCE_RAP, value);
}

static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
{
	out_be16(lp->base + LANCE_RDP, value);
}

static unsigned short m147lance_readrdp(struct lance_private *lp)
{
	return in_be16(lp->base + LANCE_RDP);
}

static int m147lance_open(struct net_device *dev)
{
	int status;

	status = lance_open(dev);                 /* call generic lance open code */
	if (status)
		return status;
	/* enable interrupts at board level. */
	m147_pcc->lan_cntrl=0;       /* clear the interrupts (if any) */
	m147_pcc->lan_cntrl=0x08 | 0x04;     /* Enable irq 4 */

	return 0;
}

static int m147lance_close(struct net_device *dev)
{
	/* disable interrupts at boardlevel */
	m147_pcc->lan_cntrl=0x0; /* disable interrupts */
	lance_close(dev);
	return 0;
}

#ifdef MODULE
MODULE_LICENSE("GPL");

static struct net_device *dev_mvme147_lance;
int __init init_module(void)
{
	dev_mvme147_lance = mvme147lance_probe(-1);
	if (IS_ERR(dev_mvme147_lance))
		return PTR_ERR(dev_mvme147_lance);
	return 0;
}

void __exit cleanup_module(void)
{
	struct m147lance_private *lp = dev_mvme147_lance->priv;
	unregister_netdev(dev_mvme147_lance);
	free_pages(lp->ram, 3);
	free_netdev(dev_mvme147_lance);
}

#endif /* MODULE */
Commit	Line	Data
1da177e4 LT	1	/* mvme147.c : the Linux/mvme147/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/netdevice.h>
	22	#include <linux/etherdevice.h>
	23	#include <linux/skbuff.h>
	24
	25	#include <asm/system.h>
	26	#include <asm/io.h>
	27	#include <asm/pgtable.h>
	28	#include <asm/mvme147hw.h>
	29
	30	/* We have 16834 bytes of RAM for the init block and buffers. This places
	31	* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
	32	* buffers and 2 Tx buffers.
	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 m147lance_private {
	41	struct lance_private lance;
	42	unsigned long ram;
	43	};
	44
	45	/* function prototypes... This is easy because all the grot is in the
	46	* generic LANCE support. All we have to support is probing for boards,
	47	* plus board-specific init, open and close actions.
	48	* Oh, and we need to tell the generic code how to read and write LANCE registers...
	49	*/
	50	static int m147lance_open(struct net_device *dev);
	51	static int m147lance_close(struct net_device *dev);
	52	static void m147lance_writerap(struct lance_private *lp, unsigned short value);
	53	static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
	54	static unsigned short m147lance_readrdp(struct lance_private *lp);
	55
	56	typedef void (writerap_t)(void , unsigned short);
	57	typedef void (writerdp_t)(void , unsigned short);
	58	typedef unsigned short (readrdp_t)(void );
	59
	60	/* Initialise the one and only on-board 7990 */
	61	struct net_device * __init mvme147lance_probe(int unit)
	62	{
	63	struct net_device *dev;
	64	static int called;
65	static const char name[] = "MVME147 LANCE";
66	struct m147lance_private *lp;
67	u_long *addr;
68	u_long address;
69	int err;
0795af57	70	DECLARE_MAC_BUF(mac);
1da177e4 LT	71
	72	if (!MACH_IS_MVME147 \|\| called)
	73	return ERR_PTR(-ENODEV);
	74	called++;
	75
	76	dev = alloc_etherdev(sizeof(struct m147lance_private));
	77	if (!dev)
	78	return ERR_PTR(-ENOMEM);
	79
	80	if (unit >= 0)
	81	sprintf(dev->name, "eth%d", unit);
	82
1da177e4 LT	83	/* Fill the dev fields */
	84	dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
	85	dev->open = &m147lance_open;
	86	dev->stop = &m147lance_close;
	87	dev->hard_start_xmit = &lance_start_xmit;
1da177e4 LT	88	dev->set_multicast_list = &lance_set_multicast;
	89	dev->tx_timeout = &lance_tx_timeout;
	90	dev->dma = 0;
	91
	92	addr=(u_long *)ETHERNET_ADDRESS;
	93	address = *addr;
	94	dev->dev_addr[0]=0x08;
	95	dev->dev_addr[1]=0x00;
	96	dev->dev_addr[2]=0x3e;
	97	address=address>>8;
	98	dev->dev_addr[5]=address&0xff;
	99	address=address>>8;
	100	dev->dev_addr[4]=address&0xff;
	101	address=address>>8;
	102	dev->dev_addr[3]=address&0xff;
	103
0795af57 JP	104	printk("%s: MVME147 at 0x%08lx, irq %d, "
	105	"Hardware Address %s\n",
	106	dev->name, dev->base_addr, MVME147_LANCE_IRQ,
	107	print_mac(mac, dev->dev_addr));
1da177e4 LT	108
	109	lp = (struct m147lance_private *)dev->priv;
	110	lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */
	111	if (!lp->ram)
	112	{
	113	printk("%s: No memory for LANCE buffers\n", dev->name);
	114	free_netdev(dev);
	115	return ERR_PTR(-ENOMEM);
	116	}
	117
	118	lp->lance.name = (char)name; / discards const, shut up gcc */
	119	lp->lance.base = dev->base_addr;
	120	lp->lance.init_block = (struct lance_init_block )(lp->ram); / CPU addr */
	121	lp->lance.lance_init_block = (struct lance_init_block )(lp->ram); / LANCE addr of same RAM */
	122	lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
	123	lp->lance.irq = MVME147_LANCE_IRQ;
	124	lp->lance.writerap = (writerap_t)m147lance_writerap;
	125	lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
	126	lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
	127	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
	128	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
	129	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
	130	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
	131
	132	err = register_netdev(dev);
	133	if (err) {
	134	free_pages(lp->ram, 3);
	135	free_netdev(dev);
	136	return ERR_PTR(err);
	137	}
	138
	139	return dev;
	140	}
	141
	142	static void m147lance_writerap(struct lance_private *lp, unsigned short value)
	143	{
	144	out_be16(lp->base + LANCE_RAP, value);
	145	}
	146
	147	static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
	148	{
	149	out_be16(lp->base + LANCE_RDP, value);
	150	}
	151
	152	static unsigned short m147lance_readrdp(struct lance_private *lp)
	153	{
	154	return in_be16(lp->base + LANCE_RDP);
	155	}
	156
	157	static int m147lance_open(struct net_device *dev)
	158	{
	159	int status;
	160
	161	status = lance_open(dev); /* call generic lance open code */
	162	if (status)
	163	return status;
	164	/* enable interrupts at board level. */
	165	m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */
	166	m147_pcc->lan_cntrl=0x08 \| 0x04; /* Enable irq 4 */
	167
	168	return 0;
	169	}
	170
	171	static int m147lance_close(struct net_device *dev)
172	{
173	/* disable interrupts at boardlevel */
174	m147_pcc->lan_cntrl=0x0; /* disable interrupts */
175	lance_close(dev);
176	return 0;
177	}
178
179	#ifdef MODULE
180	MODULE_LICENSE("GPL");
181
182	static struct net_device *dev_mvme147_lance;
afc8eb46	183	int __init init_module(void)
1da177e4 LT	184	{
	185	dev_mvme147_lance = mvme147lance_probe(-1);
	186	if (IS_ERR(dev_mvme147_lance))
	187	return PTR_ERR(dev_mvme147_lance);
	188	return 0;
	189	}
	190
afc8eb46	191	void __exit cleanup_module(void)
1da177e4 LT	192	{
	193	struct m147lance_private *lp = dev_mvme147_lance->priv;
	194	unregister_netdev(dev_mvme147_lance);
	195	free_pages(lp->ram, 3);
	196	free_netdev(dev_mvme147_lance);
	197	}
	198
	199	#endif /* MODULE */