/* 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/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/gfp.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/io.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.h>
/* We have 32K 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 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 *);
static const struct net_device_ops lance_netdev_ops = {
.ndo_open = m147lance_open,
.ndo_stop = m147lance_close,
.ndo_start_xmit = lance_start_xmit,
.ndo_set_rx_mode = lance_set_multicast,
.ndo_tx_timeout = lance_tx_timeout,
.ndo_change_mtu = eth_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
/* 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;
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->netdev_ops = &lance_netdev_ops;
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 %pM\n",
dev->name, dev->base_addr, MVME147_LANCE_IRQ,
dev->dev_addr);
lp = netdev_priv(dev);
lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */
if (!lp->ram) {
printk("%s: No memory for LANCE buffers\n", dev->name);
free_netdev(dev);
return ERR_PTR(-ENOMEM);
}
lp->lance.name = name;
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);
return PTR_ERR_OR_ZERO(dev_mvme147_lance);
}
void __exit cleanup_module(void)
{
struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);
unregister_netdev(dev_mvme147_lance);
free_pages(lp->ram, 3);
free_netdev(dev_mvme147_lance);
}
#endif /* MODULE */