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 #include "8390.h"
  35
  36 #define NE_EN0_DCFG     (0x0e*2)
  37
  38 #define NESM_START_PG   0x0    /* First page of TX buffer */
  39 #define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */
  40
  41 #define HYDRA_NIC_BASE 0xffe1
  42 #define HYDRA_ADDRPROM 0xffc0
  43 #define HYDRA_VERSION "v3.0alpha"
  44
  45 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  46
  47
  48 static int __devinit hydra_init_one(struct zorro_dev *z,
  49                                     const struct zorro_device_id *ent);
  50 static int __devinit hydra_init(struct zorro_dev *z);
  51 static int hydra_open(struct net_device *dev);
  52 static int hydra_close(struct net_device *dev);
  53 static void hydra_reset_8390(struct net_device *dev);
  54 static void hydra_get_8390_hdr(struct net_device *dev,
  55                                struct e8390_pkt_hdr *hdr, int ring_page);
  56 static void hydra_block_input(struct net_device *dev, int count,
  57                               struct sk_buff *skb, int ring_offset);
  58 static void hydra_block_output(struct net_device *dev, int count,
  59                                const unsigned char *buf, int start_page);
  60 static void __devexit hydra_remove_one(struct zorro_dev *z);
  61
  62 static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
  63     { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
  64     { 0 }
  65 };
  66
  67 static struct zorro_driver hydra_driver = {
  68     .name       = "hydra",
  69     .id_table   = hydra_zorro_tbl,
  70     .probe      = hydra_init_one,
  71     .remove     = __devexit_p(hydra_remove_one),
  72 };
  73
  74 static int __devinit hydra_init_one(struct zorro_dev *z,
  75                                     const struct zorro_device_id *ent)
  76 {
  77     int err;
  78
  79     if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
  80         return -EBUSY;
  81     if ((err = hydra_init(z))) {
  82         release_mem_region(z->resource.start, 0x10000);
  83         return -EBUSY;
  84     }
  85     return 0;
  86 }
  87
  88 static int __devinit hydra_init(struct zorro_dev *z)
  89 {
  90     struct net_device *dev;
  91     unsigned long board = ZTWO_VADDR(z->resource.start);
  92     unsigned long ioaddr = board+HYDRA_NIC_BASE;
  93     const char name[] = "NE2000";
  94     int start_page, stop_page;
  95     int j;
  96     int err;
  97
  98     static u32 hydra_offsets[16] = {
  99         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 100         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 101     };
 102
 103     dev = alloc_ei_netdev();
 104     if (!dev)
 105         return -ENOMEM;
 106     SET_MODULE_OWNER(dev);
 107
 108     for(j = 0; j < ETHER_ADDR_LEN; j++)
 109         dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
 110
 111     /* We must set the 8390 for word mode. */
 112     z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
 113     start_page = NESM_START_PG;
 114     stop_page = NESM_STOP_PG;
 115
 116     dev->base_addr = ioaddr;
 117     dev->irq = IRQ_AMIGA_PORTS;
 118
 119     /* Install the Interrupt handler */
 120     if (request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, "Hydra Ethernet",
 121                     dev)) {
 122         free_netdev(dev);
 123         return -EAGAIN;
 124     }
 125
 126     ei_status.name = name;
 127     ei_status.tx_start_page = start_page;
 128     ei_status.stop_page = stop_page;
 129     ei_status.word16 = 1;
 130     ei_status.bigendian = 1;
 131
 132     ei_status.rx_start_page = start_page + TX_PAGES;
 133
 134     ei_status.reset_8390 = &hydra_reset_8390;
 135     ei_status.block_input = &hydra_block_input;
 136     ei_status.block_output = &hydra_block_output;
 137     ei_status.get_8390_hdr = &hydra_get_8390_hdr;
 138     ei_status.reg_offset = hydra_offsets;
 139     dev->open = &hydra_open;
 140     dev->stop = &hydra_close;
 141 #ifdef CONFIG_NET_POLL_CONTROLLER
 142     dev->poll_controller = ei_poll;
 143 #endif
 144
 145     NS8390_init(dev, 0);
 146
 147     err = register_netdev(dev);
 148     if (err) {
 149         free_irq(IRQ_AMIGA_PORTS, dev);
 150         free_netdev(dev);
 151         return err;
 152     }
 153
 154     zorro_set_drvdata(z, dev);
 155
 156     printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
 157            "%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
 158            dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
 159            dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
 160            dev->dev_addr[5]);
 161
 162     return 0;
 163 }
 164
 165 static int hydra_open(struct net_device *dev)
 166 {
 167     ei_open(dev);
 168     return 0;
 169 }
 170
 171 static int hydra_close(struct net_device *dev)
 172 {
 173     if (ei_debug > 1)
 174         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 175     ei_close(dev);
 176     return 0;
 177 }
 178
 179 static void hydra_reset_8390(struct net_device *dev)
 180 {
 181     printk(KERN_INFO "Hydra hw reset not there\n");
 182 }
 183
 184 static void hydra_get_8390_hdr(struct net_device *dev,
 185                                struct e8390_pkt_hdr *hdr, int ring_page)
 186 {
 187     int nic_base = dev->base_addr;
 188     short *ptrs;
 189     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
 190                              ((ring_page - NESM_START_PG)<<8);
 191     ptrs = (short *)hdr;
 192
 193     *(ptrs++) = z_readw(hdr_start);
 194     *((short *)hdr) = WORDSWAP(*((short *)hdr));
 195     hdr_start += 2;
 196     *(ptrs++) = z_readw(hdr_start);
 197     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
 198 }
 199
 200 static void hydra_block_input(struct net_device *dev, int count,
 201                               struct sk_buff *skb, int ring_offset)
 202 {
 203     unsigned long nic_base = dev->base_addr;
 204     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 205     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
 206
 207     if (count&1)
 208         count++;
 209
 210     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
 211         int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
 212
 213         z_memcpy_fromio(skb->data,xfer_start,semi_count);
 214         count -= semi_count;
 215         z_memcpy_fromio(skb->data+semi_count, mem_base, count);
 216     } else
 217         z_memcpy_fromio(skb->data, xfer_start,count);
 218
 219 }
 220
 221 static void hydra_block_output(struct net_device *dev, int count,
 222                                const unsigned char *buf, int start_page)
 223 {
 224     unsigned long nic_base = dev->base_addr;
 225     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 226
 227     if (count&1)
 228         count++;
 229
 230     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
 231 }
 232
 233 static void __devexit hydra_remove_one(struct zorro_dev *z)
 234 {
 235     struct net_device *dev = zorro_get_drvdata(z);
 236
 237     unregister_netdev(dev);
 238     free_irq(IRQ_AMIGA_PORTS, dev);
 239     release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
 240     free_netdev(dev);
 241 }
 242
 243 static int __init hydra_init_module(void)
 244 {
 245     return zorro_module_init(&hydra_driver);
 246 }
 247
 248 static void __exit hydra_cleanup_module(void)
 249 {
 250     zorro_unregister_driver(&hydra_driver);
 251 }
 252
 253 module_init(hydra_init_module);
 254 module_exit(hydra_cleanup_module);
 255
 256 MODULE_LICENSE("GPL");