275 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2 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 37static 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 0xffe148#define HYDRA_ADDRPROM 0xffc049#define HYDRA_VERSION "v3.0alpha"50 51#define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))52 53 54static int hydra_init_one(struct zorro_dev *z,55 const struct zorro_device_id *ent);56static int hydra_init(struct zorro_dev *z);57static int hydra_open(struct net_device *dev);58static int hydra_close(struct net_device *dev);59static void hydra_reset_8390(struct net_device *dev);60static void hydra_get_8390_hdr(struct net_device *dev,61 struct e8390_pkt_hdr *hdr, int ring_page);62static void hydra_block_input(struct net_device *dev, int count,63 struct sk_buff *skb, int ring_offset);64static void hydra_block_output(struct net_device *dev, int count,65 const unsigned char *buf, int start_page);66static void hydra_remove_one(struct zorro_dev *z);67 68static struct zorro_device_id hydra_zorro_tbl[] = {69 { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },70 { 0 }71};72MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl);73 74static 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 81static 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 95static 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_CONTROLLER106 .ndo_poll_controller = __ei_poll,107#endif108};109 110static 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 181static int hydra_open(struct net_device *dev)182{183 __ei_open(dev);184 return 0;185}186 187static 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 196static void hydra_reset_8390(struct net_device *dev)197{198 netdev_info(dev, "Hydra hw reset not there\n");199}200 201static 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 217static 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 } else234 z_memcpy_fromio(skb->data, xfer_start,count);235 236}237 238static 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 250static 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 260static int __init hydra_init_module(void)261{262 return zorro_register_driver(&hydra_driver);263}264 265static void __exit hydra_cleanup_module(void)266{267 zorro_unregister_driver(&hydra_driver);268}269 270module_init(hydra_init_module);271module_exit(hydra_cleanup_module);272 273MODULE_DESCRIPTION("Zorro-II Hydra 8390 ethernet driver");274MODULE_LICENSE("GPL");275