Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* New Hydra driver using generic 8390 core */

/* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */

/* This file is subject to the terms and conditions of the GNU General      */

/* Public License.  See the file COPYING in the main directory of the       */

/* Linux distribution for more details.                                     */

/* Peter De Schrijver (p2@mind.be) */

/* Oldenburg 2000 */

/* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a    */

/* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM  */

/* and 10BASE-2 (thin coax) and AUI connectors.                             */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/ioport.h>

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include <linux/init.h>

#include <linux/bitops.h>

#include <asm/io.h>

#include <asm/irq.h>

#include <asm/amigaints.h>

#include <asm/amigahw.h>

#include <linux/zorro.h>

#define EI_SHIFT(x)     (ei_local->reg_offset[x])

#define ei_inb(port)   in_8(port)

#define ei_outb(val,port)  out_8(port,val)

#define ei_inb_p(port)   in_8(port)

#define ei_outb_p(val,port)  out_8(port,val)

static const char version[] =

    "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include "lib8390.c"

#define NE_EN0_DCFG     (0x0e*2)

#define NESM_START_PG   0x0    /* First page of TX buffer */

#define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */

#define HYDRA_NIC_BASE 0xffe1

#define HYDRA_ADDRPROM 0xffc0

#define HYDRA_VERSION "v3.0alpha"

#define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))

static int __devinit hydra_init_one(struct zorro_dev *z,

                                    const struct zorro_device_id *ent);

static int __devinit hydra_init(struct zorro_dev *z);

static int hydra_open(struct net_device *dev);

static int hydra_close(struct net_device *dev);

static void hydra_reset_8390(struct net_device *dev);

static void hydra_get_8390_hdr(struct net_device *dev,

                               struct e8390_pkt_hdr *hdr, int ring_page);

static void hydra_block_input(struct net_device *dev, int count,

                              struct sk_buff *skb, int ring_offset);

static void hydra_block_output(struct net_device *dev, int count,

                               const unsigned char *buf, int start_page);

static void __devexit hydra_remove_one(struct zorro_dev *z);

static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {

    { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },

    { 0 }

};

static struct zorro_driver hydra_driver = {

    .name       = "hydra",

    .id_table   = hydra_zorro_tbl,

    .probe      = hydra_init_one,

    .remove     = __devexit_p(hydra_remove_one),

};

static int __devinit hydra_init_one(struct zorro_dev *z,

                                    const struct zorro_device_id *ent)

{

    int err;

    if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))

        return -EBUSY;

    if ((err = hydra_init(z))) {

        release_mem_region(z->resource.start, 0x10000);

        return -EBUSY;

    }

    return 0;

}

static int __devinit hydra_init(struct zorro_dev *z)

{

    struct net_device *dev;

    unsigned long board = ZTWO_VADDR(z->resource.start);

    unsigned long ioaddr = board+HYDRA_NIC_BASE;

    const char name[] = "NE2000";

    int start_page, stop_page;

    int j;

    int err;

    DECLARE_MAC_BUF(mac);

    static u32 hydra_offsets[16] = {

        0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,

        0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,

    };

    dev = ____alloc_ei_netdev(0);

    if (!dev)

        return -ENOMEM;

    for(j = 0; j < ETHER_ADDR_LEN; j++)

        dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));

    /* We must set the 8390 for word mode. */

    z_writeb(0x4b, ioaddr + NE_EN0_DCFG);

    start_page = NESM_START_PG;

    stop_page = NESM_STOP_PG;

    dev->base_addr = ioaddr;

    dev->irq = IRQ_AMIGA_PORTS;

    /* Install the Interrupt handler */

    if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",

                    dev)) {

        free_netdev(dev);

        return -EAGAIN;

    }

    ei_status.name = name;

    ei_status.tx_start_page = start_page;

    ei_status.stop_page = stop_page;

    ei_status.word16 = 1;

    ei_status.bigendian = 1;

    ei_status.rx_start_page = start_page + TX_PAGES;

    ei_status.reset_8390 = &hydra_reset_8390;

    ei_status.block_input = &hydra_block_input;

    ei_status.block_output = &hydra_block_output;

    ei_status.get_8390_hdr = &hydra_get_8390_hdr;

    ei_status.reg_offset = hydra_offsets;

    dev->open = &hydra_open;

    dev->stop = &hydra_close;

#ifdef CONFIG_NET_POLL_CONTROLLER

    dev->poll_controller = __ei_poll;

#endif

    __NS8390_init(dev, 0);

    err = register_netdev(dev);

    if (err) {

        free_irq(IRQ_AMIGA_PORTS, dev);

        free_netdev(dev);

        return err;

    }

    zorro_set_drvdata(z, dev);

    printk(KERN_INFO "%s: Hydra at 0x%08lx, address "

           "%s (hydra.c " HYDRA_VERSION ")\n",

           dev->name, z->resource.start, print_mac(mac, dev->dev_addr));

    return 0;

}

static int hydra_open(struct net_device *dev)

{

    __ei_open(dev);

    return 0;

}

static int hydra_close(struct net_device *dev)

{

    if (ei_debug > 1)

        printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);

    __ei_close(dev);

    return 0;

}

static void hydra_reset_8390(struct net_device *dev)

{

    printk(KERN_INFO "Hydra hw reset not there\n");

}

static void hydra_get_8390_hdr(struct net_device *dev,

                               struct e8390_pkt_hdr *hdr, int ring_page)

{

    int nic_base = dev->base_addr;

    short *ptrs;

    unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +

                             ((ring_page - NESM_START_PG)<<8);

    ptrs = (short *)hdr;

    *(ptrs++) = z_readw(hdr_start);

    *((short *)hdr) = WORDSWAP(*((short *)hdr));

    hdr_start += 2;

    *(ptrs++) = z_readw(hdr_start);

    *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));

}

static void hydra_block_input(struct net_device *dev, int count,

                              struct sk_buff *skb, int ring_offset)

{

    unsigned long nic_base = dev->base_addr;

    unsigned long mem_base = nic_base - HYDRA_NIC_BASE;

    unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);

    if (count&1)

        count++;

    if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {

        int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;

        z_memcpy_fromio(skb->data,xfer_start,semi_count);

        count -= semi_count;

        z_memcpy_fromio(skb->data+semi_count, mem_base, count);

    } else

        z_memcpy_fromio(skb->data, xfer_start,count);

}

static void hydra_block_output(struct net_device *dev, int count,

                               const unsigned char *buf, int start_page)

{

    unsigned long nic_base = dev->base_addr;

    unsigned long mem_base = nic_base - HYDRA_NIC_BASE;

    if (count&1)

        count++;

    z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);

}

static void __devexit hydra_remove_one(struct zorro_dev *z)

{

    struct net_device *dev = zorro_get_drvdata(z);

    unregister_netdev(dev);

    free_irq(IRQ_AMIGA_PORTS, dev);

    release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);

    free_netdev(dev);

}

static int __init hydra_init_module(void)

{

    return zorro_register_driver(&hydra_driver);

}

static void __exit hydra_cleanup_module(void)

{

    zorro_unregister_driver(&hydra_driver);

}

module_init(hydra_init_module);

module_exit(hydra_cleanup_module);

MODULE_LICENSE("GPL");