1 // SPDX-License-Identifier: GPL-2.0-only 2 3 /* New Hydra driver using generic 8390 core */ 4 /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */ 5 6 /* Peter De Schrijver (p2@mind.be) */ 7 /* Oldenburg 2000 */ 8 9 /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */ 10 /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */ 11 /* and 10BASE-2 (thin coax) and AUI connectors. */ 12 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/string.h> 16 #include <linux/errno.h> 17 #include <linux/ioport.h> 18 #include <linux/interrupt.h> 19 #include <linux/netdevice.h> 20 #include <linux/etherdevice.h> 21 #include <linux/skbuff.h> 22 #include <linux/init.h> 23 #include <linux/bitops.h> 24 25 #include <asm/io.h> 26 #include <asm/irq.h> 27 #include <asm/amigaints.h> 28 #include <asm/amigahw.h> 29 #include <linux/zorro.h> 30 31 #define EI_SHIFT(x) (ei_local->reg_offset[x]) 32 #define ei_inb(port) in_8(port) 33 #define ei_outb(val,port) out_8(port,val) 34 #define ei_inb_p(port) in_8(port) 35 #define ei_outb_p(val,port) out_8(port,val) 36 37 static const char version[] = 38 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 39 40 #include "lib8390.c" 41 42 #define NE_EN0_DCFG (0x0e*2) 43 44 #define NESM_START_PG 0x0 /* First page of TX buffer */ 45 #define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */ 46 47 #define HYDRA_NIC_BASE 0xffe1 48 #define HYDRA_ADDRPROM 0xffc0 49 #define HYDRA_VERSION "v3.0alpha" 50 51 #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8)) 52 53 54 static int hydra_init_one(struct zorro_dev *z, 55 const struct zorro_device_id *ent); 56 static int hydra_init(struct zorro_dev *z); 57 static int hydra_open(struct net_device *dev); 58 static int hydra_close(struct net_device *dev); 59 static void hydra_reset_8390(struct net_device *dev); 60 static void hydra_get_8390_hdr(struct net_device *dev, 61 struct e8390_pkt_hdr *hdr, int ring_page); 62 static void hydra_block_input(struct net_device *dev, int count, 63 struct sk_buff *skb, int ring_offset); 64 static void hydra_block_output(struct net_device *dev, int count, 65 const unsigned char *buf, int start_page); 66 static void hydra_remove_one(struct zorro_dev *z); 67 68 static struct zorro_device_id hydra_zorro_tbl[] = { 69 { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET }, 70 { 0 } 71 }; 72 MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl); 73 74 static struct zorro_driver hydra_driver = { 75 .name = "hydra", 76 .id_table = hydra_zorro_tbl, 77 .probe = hydra_init_one, 78 .remove = hydra_remove_one, 79 }; 80 81 static int hydra_init_one(struct zorro_dev *z, 82 const struct zorro_device_id *ent) 83 { 84 int err; 85 86 if (!request_mem_region(z->resource.start, 0x10000, "Hydra")) 87 return -EBUSY; 88 if ((err = hydra_init(z))) { 89 release_mem_region(z->resource.start, 0x10000); 90 return -EBUSY; 91 } 92 return 0; 93 } 94 95 static const struct net_device_ops hydra_netdev_ops = { 96 .ndo_open = hydra_open, 97 .ndo_stop = hydra_close, 98 99 .ndo_start_xmit = __ei_start_xmit, 100 .ndo_tx_timeout = __ei_tx_timeout, 101 .ndo_get_stats = __ei_get_stats, 102 .ndo_set_rx_mode = __ei_set_multicast_list, 103 .ndo_validate_addr = eth_validate_addr, 104 .ndo_set_mac_address = eth_mac_addr, 105 #ifdef CONFIG_NET_POLL_CONTROLLER 106 .ndo_poll_controller = __ei_poll, 107 #endif 108 }; 109 110 static int hydra_init(struct zorro_dev *z) 111 { 112 struct net_device *dev; 113 unsigned long board = (unsigned long)ZTWO_VADDR(z->resource.start); 114 unsigned long ioaddr = board+HYDRA_NIC_BASE; 115 const char name[] = "NE2000"; 116 int start_page, stop_page; 117 u8 macaddr[ETH_ALEN]; 118 int j; 119 int err; 120 121 static u32 hydra_offsets[16] = { 122 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 123 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, 124 }; 125 126 dev = ____alloc_ei_netdev(0); 127 if (!dev) 128 return -ENOMEM; 129 130 for (j = 0; j < ETH_ALEN; j++) 131 macaddr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j)); 132 eth_hw_addr_set(dev, macaddr); 133 134 /* We must set the 8390 for word mode. */ 135 z_writeb(0x4b, ioaddr + NE_EN0_DCFG); 136 start_page = NESM_START_PG; 137 stop_page = NESM_STOP_PG; 138 139 dev->base_addr = ioaddr; 140 dev->irq = IRQ_AMIGA_PORTS; 141 142 /* Install the Interrupt handler */ 143 if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet", 144 dev)) { 145 free_netdev(dev); 146 return -EAGAIN; 147 } 148 149 ei_status.name = name; 150 ei_status.tx_start_page = start_page; 151 ei_status.stop_page = stop_page; 152 ei_status.word16 = 1; 153 ei_status.bigendian = 1; 154 155 ei_status.rx_start_page = start_page + TX_PAGES; 156 157 ei_status.reset_8390 = hydra_reset_8390; 158 ei_status.block_input = hydra_block_input; 159 ei_status.block_output = hydra_block_output; 160 ei_status.get_8390_hdr = hydra_get_8390_hdr; 161 ei_status.reg_offset = hydra_offsets; 162 163 dev->netdev_ops = &hydra_netdev_ops; 164 __NS8390_init(dev, 0); 165 166 err = register_netdev(dev); 167 if (err) { 168 free_irq(IRQ_AMIGA_PORTS, dev); 169 free_netdev(dev); 170 return err; 171 } 172 173 zorro_set_drvdata(z, dev); 174 175 pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n", 176 dev->name, &z->resource, dev->dev_addr); 177 178 return 0; 179 } 180 181 static int hydra_open(struct net_device *dev) 182 { 183 __ei_open(dev); 184 return 0; 185 } 186 187 static int hydra_close(struct net_device *dev) 188 { 189 struct ei_device *ei_local = netdev_priv(dev); 190 191 netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n"); 192 __ei_close(dev); 193 return 0; 194 } 195 196 static void hydra_reset_8390(struct net_device *dev) 197 { 198 netdev_info(dev, "Hydra hw reset not there\n"); 199 } 200 201 static void hydra_get_8390_hdr(struct net_device *dev, 202 struct e8390_pkt_hdr *hdr, int ring_page) 203 { 204 int nic_base = dev->base_addr; 205 short *ptrs; 206 unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) + 207 ((ring_page - NESM_START_PG)<<8); 208 ptrs = (short *)hdr; 209 210 *(ptrs++) = z_readw(hdr_start); 211 *((short *)hdr) = WORDSWAP(*((short *)hdr)); 212 hdr_start += 2; 213 *(ptrs++) = z_readw(hdr_start); 214 *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1)); 215 } 216 217 static void hydra_block_input(struct net_device *dev, int count, 218 struct sk_buff *skb, int ring_offset) 219 { 220 unsigned long nic_base = dev->base_addr; 221 unsigned long mem_base = nic_base - HYDRA_NIC_BASE; 222 unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8); 223 224 if (count&1) 225 count++; 226 227 if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) { 228 int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start; 229 230 z_memcpy_fromio(skb->data,xfer_start,semi_count); 231 count -= semi_count; 232 z_memcpy_fromio(skb->data+semi_count, mem_base, count); 233 } else 234 z_memcpy_fromio(skb->data, xfer_start,count); 235 236 } 237 238 static void hydra_block_output(struct net_device *dev, int count, 239 const unsigned char *buf, int start_page) 240 { 241 unsigned long nic_base = dev->base_addr; 242 unsigned long mem_base = nic_base - HYDRA_NIC_BASE; 243 244 if (count&1) 245 count++; 246 247 z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count); 248 } 249 250 static void hydra_remove_one(struct zorro_dev *z) 251 { 252 struct net_device *dev = zorro_get_drvdata(z); 253 254 unregister_netdev(dev); 255 free_irq(IRQ_AMIGA_PORTS, dev); 256 release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000); 257 free_netdev(dev); 258 } 259 260 static int __init hydra_init_module(void) 261 { 262 return zorro_register_driver(&hydra_driver); 263 } 264 265 static void __exit hydra_cleanup_module(void) 266 { 267 zorro_unregister_driver(&hydra_driver); 268 } 269 270 module_init(hydra_init_module); 271 module_exit(hydra_cleanup_module); 272 273 MODULE_LICENSE("GPL"); 274