drivers/net/hp.c

   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 General Public License, incorporated herein by reference.
  10
  11         The author may be reached as becker@scyld.com, or C/O
  12         Scyld Computing Corporation
  13         410 Severn Ave., Suite 210
  14         Annapolis MD 21403
  15
  16         This is a driver for the HP PC-LAN adaptors.
  17
  18         Sources:
  19           The Crynwr packet driver.
  20 */
  21
  22 static const char version[] =
  23         "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  24
  25
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28 #include <linux/errno.h>
  29 #include <linux/ioport.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/init.h>
  33 #include <linux/delay.h>
  34
  35 #include <asm/system.h>
  36 #include <asm/io.h>
  37
  38 #include "8390.h"
  39
  40 #define DRV_NAME "hp"
  41
  42 /* A zero-terminated list of I/O addresses to be probed. */
  43 static unsigned int hppclan_portlist[] __initdata =
  44 { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
  45
  46 #define HP_IO_EXTENT    32
  47
  48 #define HP_DATAPORT             0x0c    /* "Remote DMA" data port. */
  49 #define HP_ID                   0x07
  50 #define HP_CONFIGURE    0x08    /* Configuration register. */
  51 #define  HP_RUN                 0x01    /* 1 == Run, 0 == reset. */
  52 #define  HP_IRQ                 0x0E    /* Mask for software-configured IRQ line. */
  53 #define  HP_DATAON              0x10    /* Turn on dataport */
  54 #define NIC_OFFSET              0x10    /* Offset the 8390 registers. */
  55
  56 #define HP_START_PG             0x00    /* First page of TX buffer */
  57 #define HP_8BSTOP_PG    0x80    /* Last page +1 of RX ring */
  58 #define HP_16BSTOP_PG   0xFF    /* Same, for 16 bit cards. */
  59
  60 static int hp_probe1(struct net_device *dev, int ioaddr);
  61
  62 static void hp_reset_8390(struct net_device *dev);
  63 static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
  64                                         int ring_page);
  65 static void hp_block_input(struct net_device *dev, int count,
  66                                         struct sk_buff *skb , int ring_offset);
  67 static void hp_block_output(struct net_device *dev, int count,
  68                                                         const unsigned char *buf, int start_page);
  69
  70 static void hp_init_card(struct net_device *dev);
  71
  72 /* The map from IRQ number to HP_CONFIGURE register setting. */
  73 /* My default is IRQ5                0  1  2  3  4  5  6  7  8  9 10 11 */
  74 static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
  75
  76
  77 /*      Probe for an HP LAN adaptor.
  78         Also initialize the card and fill in STATION_ADDR with the station
  79         address. */
  80
  81 static int __init do_hp_probe(struct net_device *dev)
  82 {
  83         int i;
  84         int base_addr = dev->base_addr;
  85         int irq = dev->irq;
  86
  87         if (base_addr > 0x1ff)          /* Check a single specified location. */
  88                 return hp_probe1(dev, base_addr);
  89         else if (base_addr != 0)        /* Don't probe at all. */
  90                 return -ENXIO;
  91
  92         for (i = 0; hppclan_portlist[i]; i++) {
  93                 if (hp_probe1(dev, hppclan_portlist[i]) == 0)
  94                         return 0;
  95                 dev->irq = irq;
  96         }
  97
  98         return -ENODEV;
  99 }
 100
 101 #ifndef MODULE
 102 struct net_device * __init hp_probe(int unit)
 103 {
 104         struct net_device *dev = alloc_eip_netdev();
 105         int err;
 106
 107         if (!dev)
 108                 return ERR_PTR(-ENOMEM);
 109
 110         sprintf(dev->name, "eth%d", unit);
 111         netdev_boot_setup_check(dev);
 112
 113         err = do_hp_probe(dev);
 114         if (err)
 115                 goto out;
 116         return dev;
 117 out:
 118         free_netdev(dev);
 119         return ERR_PTR(err);
 120 }
 121 #endif
 122
 123 static int __init hp_probe1(struct net_device *dev, int ioaddr)
 124 {
 125         int i, retval, board_id, wordmode;
 126         const char *name;
 127         static unsigned version_printed;
 128
 129         if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME))
 130                 return -EBUSY;
 131
 132         /* Check for the HP physical address, 08 00 09 xx xx xx. */
 133         /* This really isn't good enough: we may pick up HP LANCE boards
 134            also!  Avoid the lance 0x5757 signature. */
 135         if (inb(ioaddr) != 0x08
 136                 || inb(ioaddr+1) != 0x00
 137                 || inb(ioaddr+2) != 0x09
 138                 || inb(ioaddr+14) == 0x57) {
 139                 retval = -ENODEV;
 140                 goto out;
 141         }
 142
 143         /* Set up the parameters based on the board ID.
 144            If you have additional mappings, please mail them to me -djb. */
 145         if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
 146                 name = "HP27247";
 147                 wordmode = 1;
 148         } else {
 149                 name = "HP27250";
 150                 wordmode = 0;
 151         }
 152
 153         if (ei_debug  &&  version_printed++ == 0)
 154                 printk(version);
 155
 156         printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
 157
 158         for(i = 0; i < ETHER_ADDR_LEN; i++)
 159                 dev->dev_addr[i] = inb(ioaddr + i);
 160
 161         printk(" %pM", dev->dev_addr);
 162
 163         /* Snarf the interrupt now.  Someday this could be moved to open(). */
 164         if (dev->irq < 2) {
 165                 static const int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
 166                 static const int irq_8list[] = { 7, 5, 3, 4, 9, 0};
 167                 const int *irqp = wordmode ? irq_16list : irq_8list;
 168                 do {
 169                         int irq = *irqp;
 170                         if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
 171                                 unsigned long cookie = probe_irq_on();
 172                                 /* Twinkle the interrupt, and check if it's seen. */
 173                                 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
 174                                 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
 175                                 if (irq == probe_irq_off(cookie)                 /* It's a good IRQ line! */
 176                                         && request_irq (irq, eip_interrupt, 0, DRV_NAME, dev) == 0) {
 177                                         printk(" selecting IRQ %d.\n", irq);
 178                                         dev->irq = *irqp;
 179                                         break;
 180                                 }
 181                         }
 182                 } while (*++irqp);
 183                 if (*irqp == 0) {
 184                         printk(" no free IRQ lines.\n");
 185                         retval = -EBUSY;
 186                         goto out;
 187                 }
 188         } else {
 189                 if (dev->irq == 2)
 190                         dev->irq = 9;
 191                 if ((retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev))) {
 192                         printk (" unable to get IRQ %d.\n", dev->irq);
 193                         goto out;
 194                 }
 195         }
 196
 197         /* Set the base address to point to the NIC, not the "real" base! */
 198         dev->base_addr = ioaddr + NIC_OFFSET;
 199         dev->netdev_ops = &eip_netdev_ops;
 200
 201         ei_status.name = name;
 202         ei_status.word16 = wordmode;
 203         ei_status.tx_start_page = HP_START_PG;
 204         ei_status.rx_start_page = HP_START_PG + TX_PAGES;
 205         ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
 206
 207         ei_status.reset_8390 = hp_reset_8390;
 208         ei_status.get_8390_hdr = hp_get_8390_hdr;
 209         ei_status.block_input = hp_block_input;
 210         ei_status.block_output = hp_block_output;
 211         hp_init_card(dev);
 212
 213         retval = register_netdev(dev);
 214         if (retval)
 215                 goto out1;
 216         return 0;
 217 out1:
 218         free_irq(dev->irq, dev);
 219 out:
 220         release_region(ioaddr, HP_IO_EXTENT);
 221         return retval;
 222 }
 223
 224 static void
 225 hp_reset_8390(struct net_device *dev)
 226 {
 227         int hp_base = dev->base_addr - NIC_OFFSET;
 228         int saved_config = inb_p(hp_base + HP_CONFIGURE);
 229
 230         if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
 231         outb_p(0x00, hp_base + HP_CONFIGURE);
 232         ei_status.txing = 0;
 233         /* Pause just a few cycles for the hardware reset to take place. */
 234         udelay(5);
 235
 236         outb_p(saved_config, hp_base + HP_CONFIGURE);
 237         udelay(5);
 238
 239         if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
 240                 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
 241
 242         if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
 243 }
 244
 245 static void
 246 hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 247 {
 248         int nic_base = dev->base_addr;
 249         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 250
 251         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 252         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 253         outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 254         outb_p(0, nic_base + EN0_RCNTHI);
 255         outb_p(0, nic_base + EN0_RSARLO);       /* On page boundary */
 256         outb_p(ring_page, nic_base + EN0_RSARHI);
 257         outb_p(E8390_RREAD+E8390_START, nic_base);
 258
 259         if (ei_status.word16)
 260           insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
 261         else
 262           insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
 263
 264         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 265 }
 266
 267 /* Block input and output, similar to the Crynwr packet driver. If you are
 268    porting to a new ethercard look at the packet driver source for hints.
 269    The HP LAN doesn't use shared memory -- we put the packet
 270    out through the "remote DMA" dataport. */
 271
 272 static void
 273 hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 274 {
 275         int nic_base = dev->base_addr;
 276         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 277         int xfer_count = count;
 278         char *buf = skb->data;
 279
 280         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 281         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 282         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 283         outb_p(count >> 8, nic_base + EN0_RCNTHI);
 284         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 285         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 286         outb_p(E8390_RREAD+E8390_START, nic_base);
 287         if (ei_status.word16) {
 288           insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
 289           if (count & 0x01)
 290                 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
 291         } else {
 292                 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 293         }
 294         /* This is for the ALPHA version only, remove for later releases. */
 295         if (ei_debug > 0) {                     /* DMA termination address check... */
 296           int high = inb_p(nic_base + EN0_RSARHI);
 297           int low = inb_p(nic_base + EN0_RSARLO);
 298           int addr = (high << 8) + low;
 299           /* Check only the lower 8 bits so we can ignore ring wrap. */
 300           if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
 301                 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
 302                            dev->name, ring_offset + xfer_count, addr);
 303         }
 304         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 305 }
 306
 307 static void
 308 hp_block_output(struct net_device *dev, int count,
 309                                 const unsigned char *buf, int start_page)
 310 {
 311         int nic_base = dev->base_addr;
 312         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 313
 314         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 315         /* Round the count up for word writes.  Do we need to do this?
 316            What effect will an odd byte count have on the 8390?
 317            I should check someday. */
 318         if (ei_status.word16 && (count & 0x01))
 319           count++;
 320         /* We should already be in page 0, but to be safe... */
 321         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
 322
 323 #ifdef NE8390_RW_BUGFIX
 324         /* Handle the read-before-write bug the same way as the
 325            Crynwr packet driver -- the NatSemi method doesn't work. */
 326         outb_p(0x42, nic_base + EN0_RCNTLO);
 327         outb_p(0,       nic_base + EN0_RCNTHI);
 328         outb_p(0xff, nic_base + EN0_RSARLO);
 329         outb_p(0x00, nic_base + EN0_RSARHI);
 330 #define NE_CMD          0x00
 331         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 332         /* Make certain that the dummy read has occurred. */
 333         inb_p(0x61);
 334         inb_p(0x61);
 335 #endif
 336
 337         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 338         outb_p(count >> 8,       nic_base + EN0_RCNTHI);
 339         outb_p(0x00, nic_base + EN0_RSARLO);
 340         outb_p(start_page, nic_base + EN0_RSARHI);
 341
 342         outb_p(E8390_RWRITE+E8390_START, nic_base);
 343         if (ei_status.word16) {
 344                 /* Use the 'rep' sequence for 16 bit boards. */
 345                 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
 346         } else {
 347                 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 348         }
 349
 350         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
 351
 352         /* This is for the ALPHA version only, remove for later releases. */
 353         if (ei_debug > 0) {                     /* DMA termination address check... */
 354           int high = inb_p(nic_base + EN0_RSARHI);
 355           int low  = inb_p(nic_base + EN0_RSARLO);
 356           int addr = (high << 8) + low;
 357           if ((start_page << 8) + count != addr)
 358                 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
 359                            dev->name, (start_page << 8) + count, addr);
 360         }
 361         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 362 }
 363
 364 /* This function resets the ethercard if something screws up. */
 365 static void __init
 366 hp_init_card(struct net_device *dev)
 367 {
 368         int irq = dev->irq;
 369         NS8390p_init(dev, 0);
 370         outb_p(irqmap[irq&0x0f] | HP_RUN,
 371                    dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
 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_param_array(io, int, NULL, 0);
 381 module_param_array(irq, int, NULL, 0);
 382 MODULE_PARM_DESC(io, "I/O base address(es)");
 383 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
 384 MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
 385 MODULE_LICENSE("GPL");
 386
 387 /* This is set up so that only a single autoprobe takes place per call.
 388 ISA device autoprobes on a running machine are not recommended. */
 389 int __init
 390 init_module(void)
 391 {
 392         struct net_device *dev;
 393         int this_dev, found = 0;
 394
 395         for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
 396                 if (io[this_dev] == 0)  {
 397                         if (this_dev != 0) break; /* only autoprobe 1st one */
 398                         printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
 399                 }
 400                 dev = alloc_eip_netdev();
 401                 if (!dev)
 402                         break;
 403                 dev->irq = irq[this_dev];
 404                 dev->base_addr = io[this_dev];
 405                 if (do_hp_probe(dev) == 0) {
 406                         dev_hp[found++] = dev;
 407                         continue;
 408                 }
 409                 free_netdev(dev);
 410                 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
 411                 break;
 412         }
 413         if (found)
 414                 return 0;
 415         return -ENXIO;
 416 }
 417
 418 static void cleanup_card(struct net_device *dev)
 419 {
 420         free_irq(dev->irq, dev);
 421         release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
 422 }
 423
 424 void __exit
 425 cleanup_module(void)
 426 {
 427         int this_dev;
 428
 429         for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
 430                 struct net_device *dev = dev_hp[this_dev];
 431                 if (dev) {
 432                         unregister_netdev(dev);
 433                         cleanup_card(dev);
 434                         free_netdev(dev);
 435                 }
 436         }
 437 }
 438 #endif /* MODULE */