text: /* 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;
  
      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;
      SET_MODULE_OWNER(dev);
  
      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 "
  	   "%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
  	   dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
  	   dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
  	   dev->dev_addr[5]);
  
      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");
  