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/* 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/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ptrace.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>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.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/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;
void *base;
void *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...
*/
int mvme147lance_probe(struct net_device *dev);
static int m147lance_open(struct net_device *dev);
static int m147lance_close(struct net_device *dev);
static void m147lance_writerap(struct m147lance_private *lp, unsigned short value);
static void m147lance_writerdp(struct m147lance_private *lp, unsigned short value);
static unsigned short m147lance_readrdp(struct m147lance_private *lp);
typedef void (*writerap_t)(void *, unsigned short);
typedef void (*writerdp_t)(void *, unsigned short);
typedef unsigned short (*readrdp_t)(void *);
#ifdef MODULE
static struct m147lance_private *root_m147lance_dev;
#endif
/* Initialise the one and only on-board 7990 */
int __init mvme147lance_probe(struct net_device *dev)
{
static int called;
static const char name[] = "MVME147 LANCE";
struct m147lance_private *lp;
u_long *addr;
u_long address;
if (!MACH_IS_MVME147 || called)
return -ENODEV;
called++;
SET_MODULE_OWNER(dev);
dev->priv = kmalloc(sizeof(struct m147lance_private), GFP_KERNEL);
if (dev->priv == NULL)
return -ENOMEM;
memset(dev->priv, 0, sizeof(struct m147lance_private));
/* 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->get_stats = &lance_get_stats;
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 %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name, dev->base_addr, MVME147_LANCE_IRQ,
dev->dev_addr[0],
dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4],
dev->dev_addr[5]);
lp = (struct m147lance_private *)dev->priv;
lp->ram = (void *)__get_dma_pages(GFP_ATOMIC, 3); /* 16K */
if (!lp->ram)
{
printk("%s: No memory for LANCE buffers\n", dev->name);
return -ENODEV;
}
lp->lance.name = (char*)name; /* discards const, shut up gcc */
lp->lance.ll = (struct lance_regs *)(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;
ether_setup(dev);
#ifdef MODULE
dev->ifindex = dev_new_index();
lp->next_module = root_m147lance_dev;
root_m147lance_dev = lp;
#endif /* MODULE */
return 0;
}
static void m147lance_writerap(struct m147lance_private *lp, unsigned short value)
{
lp->lance.ll->rap = value;
}
static void m147lance_writerdp(struct m147lance_private *lp, unsigned short value)
{
lp->lance.ll->rdp = value;
}
static unsigned short m147lance_readrdp(struct m147lance_private *lp)
{
return lp->lance.ll->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");
int init_module(void)
{
root_lance_dev = NULL;
return mvme147lance_probe(NULL);
}
void cleanup_module(void)
{
/* Walk the chain of devices, unregistering them */
struct m147lance_private *lp;
while (root_m147lance_dev) {
lp = root_m147lance_dev->next_module;
unregister_netdev(root_lance_dev->dev);
free_pages(lp->ram, 3);
kfree(root_lance_dev->dev);
root_lance_dev = lp;
}
}
#endif /* MODULE */
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