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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/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 */