drivers/net/hp.c

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 1 /* hp.c: A HP LAN ethernet driver for linux. */
 2 /*
 3  Written 1993-94 by Donald Becker.
 4
 5  Copyright 1993 United States Government as represented by the
 6  Director, National Security Agency.
 7
 8  This software may be used and distributed according to the terms
 9  of the GNU Public License, incorporated herein by reference.
 10
 11  The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
 12  Center of Excellence in Space Data and Information Sciences
 13  Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
 14
 15  This is a driver for the HP PC-LAN adaptors.
 16
 17  Sources:
 18  The Crynwr packet driver.
 19 */
 20
 21 static const char*version =
 22 "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
 23
 24
 25 #include <linux/module.h>
 26
 27 #include <linux/kernel.h>
 28 #include <linux/sched.h>
 29 #include <linux/errno.h>
 30 #include <linux/ioport.h>
 31 #include <linux/netdevice.h>
 32 #include <linux/etherdevice.h>
 33 #include <linux/init.h>
 34 #include <linux/delay.h>
 35
 36 #include <asm/system.h>
 37 #include <asm/io.h>
 38
 39 #include"8390.h"
 40
 41 /* A zero-terminated list of I/O addresses to be probed. */
 42 static unsigned int hppclan_portlist[] __initdata =
 43 {0x300,0x320,0x340,0x280,0x2C0,0x200,0x240,0};
 44
 45 #define HP_IO_EXTENT 32
 46
 47 #define HP_DATAPORT 0x0c/* "Remote DMA" data port. */
 48 #define HP_ID 0x07
 49 #define HP_CONFIGURE 0x08/* Configuration register. */
 50 #define HP_RUN 0x01/* 1 == Run, 0 == reset. */
 51 #define HP_IRQ 0x0E/* Mask for software-configured IRQ line. */
 52 #define HP_DATAON 0x10/* Turn on dataport */
 53 #define NIC_OFFSET 0x10/* Offset the 8390 registers. */
 54
 55 #define HP_START_PG 0x00/* First page of TX buffer */
 56 #define HP_8BSTOP_PG 0x80/* Last page +1 of RX ring */
 57 #define HP_16BSTOP_PG 0xFF/* Same, for 16 bit cards. */
 58
 59 inthp_probe(struct net_device *dev);
 60 static inthp_probe1(struct net_device *dev,int ioaddr);
 61
 62 static inthp_open(struct net_device *dev);
 63 static inthp_close(struct net_device *dev);
 64 static voidhp_reset_8390(struct net_device *dev);
 65 static voidhp_get_8390_hdr(struct net_device *dev,struct e8390_pkt_hdr *hdr,
 66 int ring_page);
 67 static voidhp_block_input(struct net_device *dev,int count,
 68 struct sk_buff *skb ,int ring_offset);
 69 static voidhp_block_output(struct net_device *dev,int count,
 70 const unsigned char*buf,int start_page);
 71
 72 static voidhp_init_card(struct net_device *dev);
 73
 74 /* The map from IRQ number to HP_CONFIGURE register setting. */
 75 /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
 76 static char irqmap[16] __initdata= {0,0,4,6,8,10,0,14,0,4,2,12,0,0,0,0};
 77
 78 \f
 79 /* Probe for an HP LAN adaptor.
 80  Also initialize the card and fill in STATION_ADDR with the station
 81  address. */
 82
 83 int __init hp_probe(struct net_device *dev)
 84 {
 85 int i;
 86 int base_addr = dev->base_addr;
 87
 88 SET_MODULE_OWNER(dev);
 89
 90 if(base_addr >0x1ff)/* Check a single specified location. */
 91 returnhp_probe1(dev, base_addr);
 92 else if(base_addr !=0)/* Don't probe at all. */
 93 return-ENXIO;
 94
 95 for(i =0; hppclan_portlist[i]; i++)
 96 if(hp_probe1(dev, hppclan_portlist[i]) ==0)
 97 return0;
 98
 99 return-ENODEV;
 100 }
 101
 102 static int __init hp_probe1(struct net_device *dev,int ioaddr)
 103 {
 104 int i, retval, board_id, wordmode;
 105 const char*name;
 106 static unsigned version_printed;
 107
 108 if(!request_region(ioaddr, HP_IO_EXTENT, dev->name))
 109 return-EBUSY;
 110
 111 /* Check for the HP physical address, 08 00 09 xx xx xx. */
 112 /* This really isn't good enough: we may pick up HP LANCE boards
 113  also! Avoid the lance 0x5757 signature. */
 114 if(inb(ioaddr) !=0x08
 115 ||inb(ioaddr+1) !=0x00
 116 ||inb(ioaddr+2) !=0x09
 117 ||inb(ioaddr+14) ==0x57) {
 118  retval = -ENODEV;
 119 goto out;
 120 }
 121
 122 /* Set up the parameters based on the board ID.
 123  If you have additional mappings, please mail them to me -djb. */
 124 if((board_id =inb(ioaddr + HP_ID)) &0x80) {
 125  name ="HP27247";
 126  wordmode =1;
 127 }else{
 128  name ="HP27250";
 129  wordmode =0;
 130 }
 131
 132 if(ei_debug && version_printed++ ==0)
 133 printk(version);
 134
 135 /* Allocate dev->priv and fill in 8390 specific dev fields. */
 136 if(ethdev_init(dev)) {
 137 printk(" unable to get memory for dev->priv.\n");
 138  retval = -ENOMEM;
 139 goto out;
 140 }
 141
 142 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
 143
 144 for(i =0; i < ETHER_ADDR_LEN; i++)
 145 printk(" %2.2x", dev->dev_addr[i] =inb(ioaddr + i));
 146
 147 /* Snarf the interrupt now. Someday this could be moved to open(). */
 148 if(dev->irq <2) {
 149 int irq_16list[] = {11,10,5,3,4,7,9,0};
 150 int irq_8list[] = {7,5,3,4,9,0};
 151 int*irqp = wordmode ? irq_16list : irq_8list;
 152 do{
 153 int irq = *irqp;
 154 if(request_irq(irq, NULL,0,"bogus", NULL) != -EBUSY) {
 155 unsigned long cookie =probe_irq_on();
 156 /* Twinkle the interrupt, and check if it's seen. */
 157 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
 158 outb_p(0x00| HP_RUN, ioaddr + HP_CONFIGURE);
 159 if(irq ==probe_irq_off(cookie)/* It's a good IRQ line! */
 160 &&request_irq(irq, ei_interrupt,0, dev->name, dev) ==0) {
 161 printk(" selecting IRQ %d.\n", irq);
 162  dev->irq = *irqp;
 163 break;
 164 }
 165 }
 166 }while(*++irqp);
 167 if(*irqp ==0) {
 168 printk(" no free IRQ lines.\n");
 169  retval = -EBUSY;
 170 goto out1;
 171 }
 172 }else{
 173 if(dev->irq ==2)
 174  dev->irq =9;
 175 if((retval =request_irq(dev->irq, ei_interrupt,0, dev->name, dev))) {
 176 printk(" unable to get IRQ %d.\n", dev->irq);
 177 goto out1;
 178 }
 179 }
 180
 181 /* Set the base address to point to the NIC, not the "real" base! */
 182  dev->base_addr = ioaddr + NIC_OFFSET;
 183  dev->open = &hp_open;
 184  dev->stop = &hp_close;
 185
 186  ei_status.name = name;
 187  ei_status.word16 = wordmode;
 188  ei_status.tx_start_page = HP_START_PG;
 189  ei_status.rx_start_page = HP_START_PG + TX_PAGES;
 190  ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
 191
 192  ei_status.reset_8390 = &hp_reset_8390;
 193  ei_status.get_8390_hdr = &hp_get_8390_hdr;
 194  ei_status.block_input = &hp_block_input;
 195  ei_status.block_output = &hp_block_output;
 196 hp_init_card(dev);
 197
 198 return0;
 199 out1:
 200 kfree(dev->priv);
 201  dev->priv = NULL;
 202 out:
 203 release_region(ioaddr, HP_IO_EXTENT);
 204 return retval;
 205 }
 206
 207 static int
 208 hp_open(struct net_device *dev)
 209 {
 210 ei_open(dev);
 211 return0;
 212 }
 213
 214 static int
 215 hp_close(struct net_device *dev)
 216 {
 217 ei_close(dev);
 218 return0;
 219 }
 220
 221 static void
 222 hp_reset_8390(struct net_device *dev)
 223 {
 224 int hp_base = dev->base_addr - NIC_OFFSET;
 225 int saved_config =inb_p(hp_base + HP_CONFIGURE);
 226
 227 if(ei_debug >1)printk("resetting the 8390 time=%ld...", jiffies);
 228 outb_p(0x00, hp_base + HP_CONFIGURE);
 229  ei_status.txing =0;
 230 /* Pause just a few cycles for the hardware reset to take place. */
 231 udelay(5);
 232
 233 outb_p(saved_config, hp_base + HP_CONFIGURE);
 234 udelay(5);
 235
 236 if((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) ==0)
 237 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
 238
 239 if(ei_debug >1)printk("8390 reset done (%ld).", jiffies);
 240 return;
 241 }
 242
 243 static void
 244 hp_get_8390_hdr(struct net_device *dev,struct e8390_pkt_hdr *hdr,int ring_page)
 245 {
 246 int nic_base = dev->base_addr;
 247 int saved_config =inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 248
 249 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 250 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 251 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 252 outb_p(0, nic_base + EN0_RCNTHI);
 253 outb_p(0, nic_base + EN0_RSARLO);/* On page boundary */
 254 outb_p(ring_page, nic_base + EN0_RSARHI);
 255 outb_p(E8390_RREAD+E8390_START, nic_base);
 256
 257 if(ei_status.word16)
 258 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr,sizeof(struct e8390_pkt_hdr)>>1);
 259 else
 260 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr,sizeof(struct e8390_pkt_hdr));
 261
 262 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 263 }
 264
 265 /* Block input and output, similar to the Crynwr packet driver. If you are
 266  porting to a new ethercard look at the packet driver source for hints.
 267  The HP LAN doesn't use shared memory -- we put the packet
 268  out through the "remote DMA" dataport. */
 269
 270 static void
 271 hp_block_input(struct net_device *dev,int count,struct sk_buff *skb,int ring_offset)
 272 {
 273 int nic_base = dev->base_addr;
 274 int saved_config =inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 275 int xfer_count = count;
 276 char*buf = skb->data;
 277
 278 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 279 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 280 outb_p(count &0xff, nic_base + EN0_RCNTLO);
 281 outb_p(count >>8, nic_base + EN0_RCNTHI);
 282 outb_p(ring_offset &0xff, nic_base + EN0_RSARLO);
 283 outb_p(ring_offset >>8, nic_base + EN0_RSARHI);
 284 outb_p(E8390_RREAD+E8390_START, nic_base);
 285 if(ei_status.word16) {
 286 insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
 287 if(count &0x01)
 288  buf[count-1] =inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
 289 }else{
 290 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 291 }
 292 /* This is for the ALPHA version only, remove for later releases. */
 293 if(ei_debug >0) {/* DMA termination address check... */
 294 int high =inb_p(nic_base + EN0_RSARHI);
 295 int low =inb_p(nic_base + EN0_RSARLO);
 296 int addr = (high <<8) + low;
 297 /* Check only the lower 8 bits so we can ignore ring wrap. */
 298 if(((ring_offset + xfer_count) &0xff) != (addr &0xff))
 299 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
 300  dev->name, ring_offset + xfer_count, addr);
 301 }
 302 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 303 }
 304
 305 static void
 306 hp_block_output(struct net_device *dev,int count,
 307 const unsigned char*buf,int start_page)
 308 {
 309 int nic_base = dev->base_addr;
 310 int saved_config =inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 311
 312 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 313 /* Round the count up for word writes. Do we need to do this?
 314  What effect will an odd byte count have on the 8390?
 315  I should check someday. */
 316 if(ei_status.word16 && (count &0x01))
 317  count++;
 318 /* We should already be in page 0, but to be safe... */
 319 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
 320
 321 #ifdef NE8390_RW_BUGFIX
 322 /* Handle the read-before-write bug the same way as the
 323  Crynwr packet driver -- the NatSemi method doesn't work. */
 324 outb_p(0x42, nic_base + EN0_RCNTLO);
 325 outb_p(0, nic_base + EN0_RCNTHI);
 326 outb_p(0xff, nic_base + EN0_RSARLO);
 327 outb_p(0x00, nic_base + EN0_RSARHI);
 328 #define NE_CMD 0x00
 329 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 330 /* Make certain that the dummy read has occurred. */
 331 inb_p(0x61);
 332 inb_p(0x61);
 333 #endif
 334
 335 outb_p(count &0xff, nic_base + EN0_RCNTLO);
 336 outb_p(count >>8, nic_base + EN0_RCNTHI);
 337 outb_p(0x00, nic_base + EN0_RSARLO);
 338 outb_p(start_page, nic_base + EN0_RSARHI);
 339
 340 outb_p(E8390_RWRITE+E8390_START, nic_base);
 341 if(ei_status.word16) {
 342 /* Use the 'rep' sequence for 16 bit boards. */
 343 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
 344 }else{
 345 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 346 }
 347
 348 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
 349
 350 /* This is for the ALPHA version only, remove for later releases. */
 351 if(ei_debug >0) {/* DMA termination address check... */
 352 int high =inb_p(nic_base + EN0_RSARHI);
 353 int low =inb_p(nic_base + EN0_RSARLO);
 354 int addr = (high <<8) + low;
 355 if((start_page <<8) + count != addr)
 356 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
 357  dev->name, (start_page <<8) + count, addr);
 358 }
 359 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 360 return;
 361 }
 362
 363 /* This function resets the ethercard if something screws up. */
 364 static void
 365 hp_init_card(struct net_device *dev)
 366 {
 367 int irq = dev->irq;
 368 NS8390_init(dev,0);
 369 outb_p(irqmap[irq&0x0f] | HP_RUN,
 370  dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
 371 return;
 372 }
 373
 374 #ifdef MODULE
 375 #define MAX_HP_CARDS 4/* Max number of HP cards per module */
 376 static struct net_device dev_hp[MAX_HP_CARDS];
 377 static int io[MAX_HP_CARDS];
 378 static int irq[MAX_HP_CARDS];
 379
 380 MODULE_PARM(io,"1-"__MODULE_STRING(MAX_HP_CARDS)"i");
 381 MODULE_PARM(irq,"1-"__MODULE_STRING(MAX_HP_CARDS)"i");
 382
 383 /* This is set up so that only a single autoprobe takes place per call.
 384 ISA device autoprobes on a running machine are not recommended. */
 385 int
 386 init_module(void)
 387 {
 388 int this_dev, found =0;
 389
 390 for(this_dev =0; this_dev < MAX_HP_CARDS; this_dev++) {
 391 struct net_device *dev = &dev_hp[this_dev];
 392  dev->irq = irq[this_dev];
 393  dev->base_addr = io[this_dev];
 394  dev->init = hp_probe;
 395 if(io[this_dev] ==0) {
 396 if(this_dev !=0)break;/* only autoprobe 1st one */
 397 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
 398 }
 399 if(register_netdev(dev) !=0) {
 400 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
 401 if(found !=0) {/* Got at least one. */
 402 return0;
 403 }
 404 return-ENXIO;
 405 }
 406  found++;
 407 }
 408 return0;
 409 }
 410
 411 void
 412 cleanup_module(void)
 413 {
 414 int this_dev;
 415
 416 for(this_dev =0; this_dev < MAX_HP_CARDS; this_dev++) {
 417 struct net_device *dev = &dev_hp[this_dev];
 418 if(dev->priv != NULL) {
 419 int ioaddr = dev->base_addr - NIC_OFFSET;
 420 void*priv = dev->priv;
 421 free_irq(dev->irq, dev);
 422 release_region(ioaddr, HP_IO_EXTENT);
 423 unregister_netdev(dev);
 424 kfree(priv);
 425 }
 426 }
 427 }
 428 #endif/* MODULE */
 429 \f
 430 /*
 431  * Local variables:
 432  * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
 433  * version-control: t
 434  * kept-new-versions: 5
 435  * tab-width: 4
 436  * c-indent-level: 4
 437  * End:
 438  */