drivers/net/hydra.c

   1 /* New Hydra driver using generic 8390 core */
   2 /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
   3
   4 /* This file is subject to the terms and conditions of the GNU General      */
   5 /* Public License.  See the file COPYING in the main directory of the       */
   6 /* Linux distribution for more details.                                     */
   7
   8 /* Peter De Schrijver (p2@mind.be) */
   9 /* Oldenburg 2000 */
  10
  11 /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a    */
  12 /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM  */
  13 /* and 10BASE-2 (thin coax) and AUI connectors.                             */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/ioport.h>
  20 #include <linux/slab.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/init.h>
  26 #include <linux/bitops.h>
  27
  28 #include <asm/io.h>
  29 #include <asm/irq.h>
  30 #include <asm/amigaints.h>
  31 #include <asm/amigahw.h>
  32 #include <linux/zorro.h>
  33
  34 #define EI_SHIFT(x)     (ei_local->reg_offset[x])
  35 #define ei_inb(port)   in_8(port)
  36 #define ei_outb(val,port)  out_8(port,val)
  37 #define ei_inb_p(port)   in_8(port)
  38 #define ei_outb_p(val,port)  out_8(port,val)
  39
  40 static const char version[] =
  41     "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  42
  43 #include "lib8390.c"
  44
  45 #define NE_EN0_DCFG     (0x0e*2)
  46
  47 #define NESM_START_PG   0x0    /* First page of TX buffer */
  48 #define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */
  49
  50 #define HYDRA_NIC_BASE 0xffe1
  51 #define HYDRA_ADDRPROM 0xffc0
  52 #define HYDRA_VERSION "v3.0alpha"
  53
  54 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  55
  56
  57 static int __devinit hydra_init_one(struct zorro_dev *z,
  58                                     const struct zorro_device_id *ent);
  59 static int __devinit hydra_init(struct zorro_dev *z);
  60 static int hydra_open(struct net_device *dev);
  61 static int hydra_close(struct net_device *dev);
  62 static void hydra_reset_8390(struct net_device *dev);
  63 static void hydra_get_8390_hdr(struct net_device *dev,
  64                                struct e8390_pkt_hdr *hdr, int ring_page);
  65 static void hydra_block_input(struct net_device *dev, int count,
  66                               struct sk_buff *skb, int ring_offset);
  67 static void hydra_block_output(struct net_device *dev, int count,
  68                                const unsigned char *buf, int start_page);
  69 static void __devexit hydra_remove_one(struct zorro_dev *z);
  70
  71 static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
  72     { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
  73     { 0 }
  74 };
  75
  76 static struct zorro_driver hydra_driver = {
  77     .name       = "hydra",
  78     .id_table   = hydra_zorro_tbl,
  79     .probe      = hydra_init_one,
  80     .remove     = __devexit_p(hydra_remove_one),
  81 };
  82
  83 static int __devinit hydra_init_one(struct zorro_dev *z,
  84                                     const struct zorro_device_id *ent)
  85 {
  86     int err;
  87
  88     if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
  89         return -EBUSY;
  90     if ((err = hydra_init(z))) {
  91         release_mem_region(z->resource.start, 0x10000);
  92         return -EBUSY;
  93     }
  94     return 0;
  95 }
  96
  97 static int __devinit hydra_init(struct zorro_dev *z)
  98 {
  99     struct net_device *dev;
 100     unsigned long board = ZTWO_VADDR(z->resource.start);
 101     unsigned long ioaddr = board+HYDRA_NIC_BASE;
 102     const char name[] = "NE2000";
 103     int start_page, stop_page;
 104     int j;
 105     int err;
 106     DECLARE_MAC_BUF(mac);
 107
 108     static u32 hydra_offsets[16] = {
 109         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 110         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 111     };
 112
 113     dev = ____alloc_ei_netdev(0);
 114     if (!dev)
 115         return -ENOMEM;
 116
 117     for(j = 0; j < ETHER_ADDR_LEN; j++)
 118         dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
 119
 120     /* We must set the 8390 for word mode. */
 121     z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
 122     start_page = NESM_START_PG;
 123     stop_page = NESM_STOP_PG;
 124
 125     dev->base_addr = ioaddr;
 126     dev->irq = IRQ_AMIGA_PORTS;
 127
 128     /* Install the Interrupt handler */
 129     if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
 130                     dev)) {
 131         free_netdev(dev);
 132         return -EAGAIN;
 133     }
 134
 135     ei_status.name = name;
 136     ei_status.tx_start_page = start_page;
 137     ei_status.stop_page = stop_page;
 138     ei_status.word16 = 1;
 139     ei_status.bigendian = 1;
 140
 141     ei_status.rx_start_page = start_page + TX_PAGES;
 142
 143     ei_status.reset_8390 = &hydra_reset_8390;
 144     ei_status.block_input = &hydra_block_input;
 145     ei_status.block_output = &hydra_block_output;
 146     ei_status.get_8390_hdr = &hydra_get_8390_hdr;
 147     ei_status.reg_offset = hydra_offsets;
 148     dev->open = &hydra_open;
 149     dev->stop = &hydra_close;
 150 #ifdef CONFIG_NET_POLL_CONTROLLER
 151     dev->poll_controller = __ei_poll;
 152 #endif
 153
 154     __NS8390_init(dev, 0);
 155
 156     err = register_netdev(dev);
 157     if (err) {
 158         free_irq(IRQ_AMIGA_PORTS, dev);
 159         free_netdev(dev);
 160         return err;
 161     }
 162
 163     zorro_set_drvdata(z, dev);
 164
 165     printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
 166            "%s (hydra.c " HYDRA_VERSION ")\n",
 167            dev->name, z->resource.start, print_mac(mac, dev->dev_addr));
 168
 169     return 0;
 170 }
 171
 172 static int hydra_open(struct net_device *dev)
 173 {
 174     __ei_open(dev);
 175     return 0;
 176 }
 177
 178 static int hydra_close(struct net_device *dev)
 179 {
 180     if (ei_debug > 1)
 181         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 182     __ei_close(dev);
 183     return 0;
 184 }
 185
 186 static void hydra_reset_8390(struct net_device *dev)
 187 {
 188     printk(KERN_INFO "Hydra hw reset not there\n");
 189 }
 190
 191 static void hydra_get_8390_hdr(struct net_device *dev,
 192                                struct e8390_pkt_hdr *hdr, int ring_page)
 193 {
 194     int nic_base = dev->base_addr;
 195     short *ptrs;
 196     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
 197                              ((ring_page - NESM_START_PG)<<8);
 198     ptrs = (short *)hdr;
 199
 200     *(ptrs++) = z_readw(hdr_start);
 201     *((short *)hdr) = WORDSWAP(*((short *)hdr));
 202     hdr_start += 2;
 203     *(ptrs++) = z_readw(hdr_start);
 204     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
 205 }
 206
 207 static void hydra_block_input(struct net_device *dev, int count,
 208                               struct sk_buff *skb, int ring_offset)
 209 {
 210     unsigned long nic_base = dev->base_addr;
 211     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 212     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
 213
 214     if (count&1)
 215         count++;
 216
 217     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
 218         int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
 219
 220         z_memcpy_fromio(skb->data,xfer_start,semi_count);
 221         count -= semi_count;
 222         z_memcpy_fromio(skb->data+semi_count, mem_base, count);
 223     } else
 224         z_memcpy_fromio(skb->data, xfer_start,count);
 225
 226 }
 227
 228 static void hydra_block_output(struct net_device *dev, int count,
 229                                const unsigned char *buf, int start_page)
 230 {
 231     unsigned long nic_base = dev->base_addr;
 232     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 233
 234     if (count&1)
 235         count++;
 236
 237     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
 238 }
 239
 240 static void __devexit hydra_remove_one(struct zorro_dev *z)
 241 {
 242     struct net_device *dev = zorro_get_drvdata(z);
 243
 244     unregister_netdev(dev);
 245     free_irq(IRQ_AMIGA_PORTS, dev);
 246     release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
 247     free_netdev(dev);
 248 }
 249
 250 static int __init hydra_init_module(void)
 251 {
 252     return zorro_register_driver(&hydra_driver);
 253 }
 254
 255 static void __exit hydra_cleanup_module(void)
 256 {
 257     zorro_unregister_driver(&hydra_driver);
 258 }
 259
 260 module_init(hydra_init_module);
 261 module_exit(hydra_cleanup_module);
 262
 263 MODULE_LICENSE("GPL");