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
  27 #include <asm/bitops.h>
  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 #include "8390.h"
  35
  36 #define NE_BASE         (dev->base_addr)
  37 #define NE_CMD          (0x00*2)
  38
  39 #define NE_EN0_ISR      (0x07*2)
  40 #define NE_EN0_DCFG     (0x0e*2)
  41
  42 #define NE_EN0_RSARLO   (0x08*2)
  43 #define NE_EN0_RSARHI   (0x09*2)
  44 #define NE_EN0_RCNTLO   (0x0a*2)
  45 #define NE_EN0_RXCR     (0x0c*2)
  46 #define NE_EN0_TXCR     (0x0d*2)
  47 #define NE_EN0_RCNTHI   (0x0b*2)
  48 #define NE_EN0_IMR      (0x0f*2)
  49
  50 #define NESM_START_PG   0x0    /* First page of TX buffer */
  51 #define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */
  52
  53 #define HYDRA_NIC_BASE 0xffe1
  54 #define HYDRA_ADDRPROM 0xffc0
  55 #define HYDRA_VERSION "v3.0alpha"
  56
  57 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  58
  59 #ifdef MODULE
  60 static struct net_device *root_hydra_dev;
  61 #endif
  62
  63 static int __init hydra_probe(void);
  64 static int hydra_init(unsigned long board);
  65 static int hydra_open(struct net_device *dev);
  66 static int hydra_close(struct net_device *dev);
  67 static void hydra_reset_8390(struct net_device *dev);
  68 static void hydra_get_8390_hdr(struct net_device *dev,
  69                                struct e8390_pkt_hdr *hdr, int ring_page);
  70 static void hydra_block_input(struct net_device *dev, int count,
  71                               struct sk_buff *skb, int ring_offset);
  72 static void hydra_block_output(struct net_device *dev, int count,
  73                                const unsigned char *buf, int start_page);
  74 static void __exit hydra_cleanup(void);
  75
  76 static int __init hydra_probe(void)
  77 {
  78     struct zorro_dev *z = NULL;
  79     unsigned long board;
  80     int err = -ENODEV;
  81
  82     while ((z = zorro_find_device(ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET, z))) {
  83         board = z->resource.start;
  84         if (!request_mem_region(board, 0x10000, "Hydra"))
  85             continue;
  86         if ((err = hydra_init(ZTWO_VADDR(board)))) {
  87             release_mem_region(board, 0x10000);
  88             return err;
  89         }
  90         err = 0;
  91     }
  92
  93     if (err == -ENODEV)
  94         printk("No Hydra ethernet card found.\n");
  95
  96     return err;
  97 }
  98
  99 int __init hydra_init(unsigned long board)
 100 {
 101     struct net_device *dev;
 102     unsigned long ioaddr = board+HYDRA_NIC_BASE;
 103     const char *name = NULL;
 104     int start_page, stop_page;
 105     int j;
 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 = init_etherdev(NULL, 0);
 113     if (!dev)
 114         return -ENOMEM;
 115     SET_MODULE_OWNER(dev);
 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, SA_SHIRQ, "Hydra Ethernet",
 130                     dev))
 131         return -EAGAIN;
 132
 133     /* Allocate dev->priv and fill in 8390 specific dev fields. */
 134     if (ethdev_init(dev)) {
 135         printk("Unable to get memory for dev->priv.\n");
 136         return -ENOMEM;
 137     }
 138
 139     name = "NE2000";
 140
 141     printk("%s: hydra at 0x%08lx, address %02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n", dev->name, ZTWO_PADDR(board),
 142         dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 143         dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 144
 145     ei_status.name = name;
 146     ei_status.tx_start_page = start_page;
 147     ei_status.stop_page = stop_page;
 148     ei_status.word16 = 1;
 149     ei_status.bigendian = 1;
 150
 151     ei_status.rx_start_page = start_page + TX_PAGES;
 152
 153     ei_status.reset_8390 = &hydra_reset_8390;
 154     ei_status.block_input = &hydra_block_input;
 155     ei_status.block_output = &hydra_block_output;
 156     ei_status.get_8390_hdr = &hydra_get_8390_hdr;
 157     ei_status.reg_offset = hydra_offsets;
 158     dev->open = &hydra_open;
 159     dev->stop = &hydra_close;
 160 #ifdef MODULE
 161     ei_status.priv = (unsigned long)root_hydra_dev;
 162     root_hydra_dev = dev;
 163 #endif
 164     NS8390_init(dev, 0);
 165     return 0;
 166 }
 167
 168 static int hydra_open(struct net_device *dev)
 169 {
 170     ei_open(dev);
 171     return 0;
 172 }
 173
 174 static int hydra_close(struct net_device *dev)
 175 {
 176     if (ei_debug > 1)
 177         printk("%s: Shutting down ethercard.\n", dev->name);
 178     ei_close(dev);
 179     return 0;
 180 }
 181
 182 static void hydra_reset_8390(struct net_device *dev)
 183 {
 184     printk("Hydra hw reset not there\n");
 185 }
 186
 187 static void hydra_get_8390_hdr(struct net_device *dev,
 188                                struct e8390_pkt_hdr *hdr, int ring_page)
 189 {
 190     int nic_base = dev->base_addr;
 191     short *ptrs;
 192     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
 193                              ((ring_page - NESM_START_PG)<<8);
 194     ptrs = (short *)hdr;
 195
 196     *(ptrs++) = z_readw(hdr_start);
 197     *((short *)hdr) = WORDSWAP(*((short *)hdr));
 198     hdr_start += 2;
 199     *(ptrs++) = z_readw(hdr_start);
 200     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
 201 }
 202
 203 static void hydra_block_input(struct net_device *dev, int count,
 204                               struct sk_buff *skb, int ring_offset)
 205 {
 206     unsigned long nic_base = dev->base_addr;
 207     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 208     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
 209
 210     if (count&1)
 211         count++;
 212
 213     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
 214         int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
 215
 216         z_memcpy_fromio(skb->data,xfer_start,semi_count);
 217         count -= semi_count;
 218         z_memcpy_fromio(skb->data+semi_count, mem_base, count);
 219     } else
 220         z_memcpy_fromio(skb->data, xfer_start,count);
 221
 222 }
 223
 224 static void hydra_block_output(struct net_device *dev, int count,
 225                                const unsigned char *buf, int start_page)
 226 {
 227     unsigned long nic_base = dev->base_addr;
 228     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 229
 230     if (count&1)
 231         count++;
 232
 233     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
 234 }
 235
 236 static void __exit hydra_cleanup(void)
 237 {
 238 #ifdef MODULE
 239     struct net_device *dev, *next;
 240
 241     while ((dev = root_hydra_dev)) {
 242         next = (struct net_device *)(ei_status.priv);
 243         unregister_netdev(dev);
 244         free_irq(IRQ_AMIGA_PORTS, dev);
 245         release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
 246         kfree(dev);
 247         root_hydra_dev = next;
 248     }
 249 #endif
 250 }
 251
 252 module_init(hydra_probe);
 253 module_exit(hydra_cleanup);
 254 MODULE_LICENSE("GPL");