hydra.c (7681B)
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/interrupt.h> 21#include <linux/netdevice.h> 22#include <linux/etherdevice.h> 23#include <linux/skbuff.h> 24#include <linux/init.h> 25#include <linux/bitops.h> 26 27#include <asm/io.h> 28#include <asm/irq.h> 29#include <asm/amigaints.h> 30#include <asm/amigahw.h> 31#include <linux/zorro.h> 32 33#define EI_SHIFT(x) (ei_local->reg_offset[x]) 34#define ei_inb(port) in_8(port) 35#define ei_outb(val,port) out_8(port,val) 36#define ei_inb_p(port) in_8(port) 37#define ei_outb_p(val,port) out_8(port,val) 38 39static const char version[] = 40 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 41 42#include "lib8390.c" 43 44#define NE_EN0_DCFG (0x0e*2) 45 46#define NESM_START_PG 0x0 /* First page of TX buffer */ 47#define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */ 48 49#define HYDRA_NIC_BASE 0xffe1 50#define HYDRA_ADDRPROM 0xffc0 51#define HYDRA_VERSION "v3.0alpha" 52 53#define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8)) 54 55 56static int hydra_init_one(struct zorro_dev *z, 57 const struct zorro_device_id *ent); 58static int hydra_init(struct zorro_dev *z); 59static int hydra_open(struct net_device *dev); 60static int hydra_close(struct net_device *dev); 61static void hydra_reset_8390(struct net_device *dev); 62static void hydra_get_8390_hdr(struct net_device *dev, 63 struct e8390_pkt_hdr *hdr, int ring_page); 64static void hydra_block_input(struct net_device *dev, int count, 65 struct sk_buff *skb, int ring_offset); 66static void hydra_block_output(struct net_device *dev, int count, 67 const unsigned char *buf, int start_page); 68static void hydra_remove_one(struct zorro_dev *z); 69 70static struct zorro_device_id hydra_zorro_tbl[] = { 71 { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET }, 72 { 0 } 73}; 74MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl); 75 76static struct zorro_driver hydra_driver = { 77 .name = "hydra", 78 .id_table = hydra_zorro_tbl, 79 .probe = hydra_init_one, 80 .remove = hydra_remove_one, 81}; 82 83static int 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 97static const struct net_device_ops hydra_netdev_ops = { 98 .ndo_open = hydra_open, 99 .ndo_stop = hydra_close, 100 101 .ndo_start_xmit = __ei_start_xmit, 102 .ndo_tx_timeout = __ei_tx_timeout, 103 .ndo_get_stats = __ei_get_stats, 104 .ndo_set_rx_mode = __ei_set_multicast_list, 105 .ndo_validate_addr = eth_validate_addr, 106 .ndo_set_mac_address = eth_mac_addr, 107#ifdef CONFIG_NET_POLL_CONTROLLER 108 .ndo_poll_controller = __ei_poll, 109#endif 110}; 111 112static int hydra_init(struct zorro_dev *z) 113{ 114 struct net_device *dev; 115 unsigned long board = (unsigned long)ZTWO_VADDR(z->resource.start); 116 unsigned long ioaddr = board+HYDRA_NIC_BASE; 117 const char name[] = "NE2000"; 118 int start_page, stop_page; 119 u8 macaddr[ETH_ALEN]; 120 int j; 121 int err; 122 123 static u32 hydra_offsets[16] = { 124 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 125 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, 126 }; 127 128 dev = ____alloc_ei_netdev(0); 129 if (!dev) 130 return -ENOMEM; 131 132 for (j = 0; j < ETH_ALEN; j++) 133 macaddr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j)); 134 eth_hw_addr_set(dev, macaddr); 135 136 /* We must set the 8390 for word mode. */ 137 z_writeb(0x4b, ioaddr + NE_EN0_DCFG); 138 start_page = NESM_START_PG; 139 stop_page = NESM_STOP_PG; 140 141 dev->base_addr = ioaddr; 142 dev->irq = IRQ_AMIGA_PORTS; 143 144 /* Install the Interrupt handler */ 145 if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet", 146 dev)) { 147 free_netdev(dev); 148 return -EAGAIN; 149 } 150 151 ei_status.name = name; 152 ei_status.tx_start_page = start_page; 153 ei_status.stop_page = stop_page; 154 ei_status.word16 = 1; 155 ei_status.bigendian = 1; 156 157 ei_status.rx_start_page = start_page + TX_PAGES; 158 159 ei_status.reset_8390 = hydra_reset_8390; 160 ei_status.block_input = hydra_block_input; 161 ei_status.block_output = hydra_block_output; 162 ei_status.get_8390_hdr = hydra_get_8390_hdr; 163 ei_status.reg_offset = hydra_offsets; 164 165 dev->netdev_ops = &hydra_netdev_ops; 166 __NS8390_init(dev, 0); 167 168 err = register_netdev(dev); 169 if (err) { 170 free_irq(IRQ_AMIGA_PORTS, dev); 171 free_netdev(dev); 172 return err; 173 } 174 175 zorro_set_drvdata(z, dev); 176 177 pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n", 178 dev->name, &z->resource, dev->dev_addr); 179 180 return 0; 181} 182 183static int hydra_open(struct net_device *dev) 184{ 185 __ei_open(dev); 186 return 0; 187} 188 189static int hydra_close(struct net_device *dev) 190{ 191 struct ei_device *ei_local = netdev_priv(dev); 192 193 netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n"); 194 __ei_close(dev); 195 return 0; 196} 197 198static void hydra_reset_8390(struct net_device *dev) 199{ 200 netdev_info(dev, "Hydra hw reset not there\n"); 201} 202 203static void hydra_get_8390_hdr(struct net_device *dev, 204 struct e8390_pkt_hdr *hdr, int ring_page) 205{ 206 int nic_base = dev->base_addr; 207 short *ptrs; 208 unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) + 209 ((ring_page - NESM_START_PG)<<8); 210 ptrs = (short *)hdr; 211 212 *(ptrs++) = z_readw(hdr_start); 213 *((short *)hdr) = WORDSWAP(*((short *)hdr)); 214 hdr_start += 2; 215 *(ptrs++) = z_readw(hdr_start); 216 *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1)); 217} 218 219static void hydra_block_input(struct net_device *dev, int count, 220 struct sk_buff *skb, int ring_offset) 221{ 222 unsigned long nic_base = dev->base_addr; 223 unsigned long mem_base = nic_base - HYDRA_NIC_BASE; 224 unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8); 225 226 if (count&1) 227 count++; 228 229 if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) { 230 int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start; 231 232 z_memcpy_fromio(skb->data,xfer_start,semi_count); 233 count -= semi_count; 234 z_memcpy_fromio(skb->data+semi_count, mem_base, count); 235 } else 236 z_memcpy_fromio(skb->data, xfer_start,count); 237 238} 239 240static void hydra_block_output(struct net_device *dev, int count, 241 const unsigned char *buf, int start_page) 242{ 243 unsigned long nic_base = dev->base_addr; 244 unsigned long mem_base = nic_base - HYDRA_NIC_BASE; 245 246 if (count&1) 247 count++; 248 249 z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count); 250} 251 252static void hydra_remove_one(struct zorro_dev *z) 253{ 254 struct net_device *dev = zorro_get_drvdata(z); 255 256 unregister_netdev(dev); 257 free_irq(IRQ_AMIGA_PORTS, dev); 258 release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000); 259 free_netdev(dev); 260} 261 262static int __init hydra_init_module(void) 263{ 264 return zorro_register_driver(&hydra_driver); 265} 266 267static void __exit hydra_cleanup_module(void) 268{ 269 zorro_unregister_driver(&hydra_driver); 270} 271 272module_init(hydra_init_module); 273module_exit(hydra_cleanup_module); 274 275MODULE_LICENSE("GPL");