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
 107     static u32 hydra_offsets[16] = {
 108         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 109         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 110     };
 111
 112     dev = ____alloc_ei_netdev(0);
 113     if (!dev)
 114         return -ENOMEM;
 115
 116     for(j = 0; j < ETHER_ADDR_LEN; j++)
 117         dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
 118
 119     /* We must set the 8390 for word mode. */
 120     z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
 121     start_page = NESM_START_PG;
 122     stop_page = NESM_STOP_PG;
 123
 124     dev->base_addr = ioaddr;
 125     dev->irq = IRQ_AMIGA_PORTS;
 126
 127     /* Install the Interrupt handler */
 128     if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
 129                     dev)) {
 130         free_netdev(dev);
 131         return -EAGAIN;
 132     }
 133
 134     ei_status.name = name;
 135     ei_status.tx_start_page = start_page;
 136     ei_status.stop_page = stop_page;
 137     ei_status.word16 = 1;
 138     ei_status.bigendian = 1;
 139
 140     ei_status.rx_start_page = start_page + TX_PAGES;
 141
 142     ei_status.reset_8390 = &hydra_reset_8390;
 143     ei_status.block_input = &hydra_block_input;
 144     ei_status.block_output = &hydra_block_output;
 145     ei_status.get_8390_hdr = &hydra_get_8390_hdr;
 146     ei_status.reg_offset = hydra_offsets;
 147     dev->open = &hydra_open;
 148     dev->stop = &hydra_close;
 149 #ifdef CONFIG_NET_POLL_CONTROLLER
 150     dev->poll_controller = __ei_poll;
 151 #endif
 152
 153     __NS8390_init(dev, 0);
 154
 155     err = register_netdev(dev);
 156     if (err) {
 157         free_irq(IRQ_AMIGA_PORTS, dev);
 158         free_netdev(dev);
 159         return err;
 160     }
 161
 162     zorro_set_drvdata(z, dev);
 163
 164     printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
 165            "%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
 166            dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
 167            dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
 168            dev->dev_addr[5]);
 169
 170     return 0;
 171 }
 172
 173 static int hydra_open(struct net_device *dev)
 174 {
 175     __ei_open(dev);
 176     return 0;
 177 }
 178
 179 static int hydra_close(struct net_device *dev)
 180 {
 181     if (ei_debug > 1)
 182         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 183     __ei_close(dev);
 184     return 0;
 185 }
 186
 187 static void hydra_reset_8390(struct net_device *dev)
 188 {
 189     printk(KERN_INFO "Hydra hw reset not there\n");
 190 }
 191
 192 static void hydra_get_8390_hdr(struct net_device *dev,
 193                                struct e8390_pkt_hdr *hdr, int ring_page)
 194 {
 195     int nic_base = dev->base_addr;
 196     short *ptrs;
 197     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
 198                              ((ring_page - NESM_START_PG)<<8);
 199     ptrs = (short *)hdr;
 200
 201     *(ptrs++) = z_readw(hdr_start);
 202     *((short *)hdr) = WORDSWAP(*((short *)hdr));
 203     hdr_start += 2;
 204     *(ptrs++) = z_readw(hdr_start);
 205     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
 206 }
 207
 208 static void hydra_block_input(struct net_device *dev, int count,
 209                               struct sk_buff *skb, int ring_offset)
 210 {
 211     unsigned long nic_base = dev->base_addr;
 212     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 213     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
 214
 215     if (count&1)
 216         count++;
 217
 218     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
 219         int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
 220
 221         z_memcpy_fromio(skb->data,xfer_start,semi_count);
 222         count -= semi_count;
 223         z_memcpy_fromio(skb->data+semi_count, mem_base, count);
 224     } else
 225         z_memcpy_fromio(skb->data, xfer_start,count);
 226
 227 }
 228
 229 static void hydra_block_output(struct net_device *dev, int count,
 230                                const unsigned char *buf, int start_page)
 231 {
 232     unsigned long nic_base = dev->base_addr;
 233     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 234
 235     if (count&1)
 236         count++;
 237
 238     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
 239 }
 240
 241 static void __devexit hydra_remove_one(struct zorro_dev *z)
 242 {
 243     struct net_device *dev = zorro_get_drvdata(z);
 244
 245     unregister_netdev(dev);
 246     free_irq(IRQ_AMIGA_PORTS, dev);
 247     release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
 248     free_netdev(dev);
 249 }
 250
 251 static int __init hydra_init_module(void)
 252 {
 253     return zorro_register_driver(&hydra_driver);
 254 }
 255
 256 static void __exit hydra_cleanup_module(void)
 257 {
 258     zorro_unregister_driver(&hydra_driver);
 259 }
 260
 261 module_init(hydra_init_module);
 262 module_exit(hydra_cleanup_module);
 263
 264 MODULE_LICENSE("GPL");