drivers/net/hp.c

/* */
This source file includes following definitions.
hp_probe
hp_probe1
hp_open
hp_close
hp_reset_8390
hp_get_8390_hdr
hp_block_input
hp_block_output
hp_init_card
init_module
cleanup_module
   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 
  34 #include <asm/system.h>
  35 #include <asm/io.h>
  36 
  37 #include "8390.h"
  38 
  39 /* A zero-terminated list of I/O addresses to be probed. */
  40 static unsigned int hppclan_portlist[] =
  41 { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
  42 
  43 #define HP_IO_EXTENT    32
  44 
  45 #define HP_DATAPORT             0x0c    /* "Remote DMA" data port. */
  46 #define HP_ID                   0x07
  47 #define HP_CONFIGURE    0x08    /* Configuration register. */
  48 #define  HP_RUN                 0x01    /* 1 == Run, 0 == reset. */
  49 #define  HP_IRQ                 0x0E    /* Mask for software-configured IRQ line. */
  50 #define  HP_DATAON              0x10    /* Turn on dataport */
  51 #define NIC_OFFSET              0x10    /* Offset the 8390 registers. */
  52 
  53 #define HP_START_PG             0x00    /* First page of TX buffer */
  54 #define HP_8BSTOP_PG    0x80    /* Last page +1 of RX ring */
  55 #define HP_16BSTOP_PG   0xFF    /* Same, for 16 bit cards. */
  56 
  57 int hp_probe(struct device *dev);
  58 int hp_probe1(struct device *dev, int ioaddr);
  59 
  60 static int hp_open(struct device *dev);
  61 static int hp_close(struct device *dev);
  62 static void hp_reset_8390(struct device *dev);
  63 static void hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
  64                                         int ring_page);
  65 static void hp_block_input(struct device *dev, int count,
  66                                         struct sk_buff *skb , int ring_offset);
  67 static void hp_block_output(struct device *dev, int count,
  68                                                         const unsigned char *buf, const start_page);
  69 
  70 static void hp_init_card(struct 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] = { 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 #ifdef HAVE_DEVLIST
  81 struct netdev_entry netcard_drv =
  82 {"hp", hp_probe1, HP_IO_EXTENT, hppclan_portlist};
  83 #else
  84 
  85 int hp_probe(struct device *dev)
     /*  */
  86 {
  87         int i;
  88         int base_addr = dev ? dev->base_addr : 0;
  89 
  90         if (base_addr > 0x1ff)          /* Check a single specified location. */
  91                 return hp_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                 int ioaddr = hppclan_portlist[i];
  97                 if (check_region(ioaddr, HP_IO_EXTENT))
  98                         continue;
  99                 if (hp_probe1(dev, ioaddr) == 0)
 100                         return 0;
 101         }
 102 
 103         return ENODEV;
 104 }
 105 #endif
 106 
 107 int hp_probe1(struct device *dev, int ioaddr)
     /*  */
 108 {
 109         int i, board_id, wordmode;
 110         const char *name;
 111         static unsigned version_printed = 0;
 112 
 113         /* Check for the HP physical address, 08 00 09 xx xx xx. */
 114         /* This really isn't good enough: we may pick up HP LANCE boards
 115            also!  Avoid the lance 0x5757 signature. */
 116         if (inb(ioaddr) != 0x08
 117                 || inb(ioaddr+1) != 0x00
 118                 || inb(ioaddr+2) != 0x09
 119                 || inb(ioaddr+14) == 0x57)
 120                 return ENODEV;
 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         /* We should have a "dev" from Space.c or the static module table. */
 133         if (dev == NULL) {
 134                 printk("hp.c: Passed a NULL device.\n");
 135                 dev = init_etherdev(0, 0);
 136         }
 137 
 138         if (ei_debug  &&  version_printed++ == 0)
 139                 printk(version);
 140  
 141         printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
 142 
 143         for(i = 0; i < ETHER_ADDR_LEN; i++)
 144                 printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
 145 
 146         /* Snarf the interrupt now.  Someday this could be moved to open(). */
 147         if (dev->irq < 2) {
 148                 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
 149                 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
 150                 int *irqp = wordmode ? irq_16list : irq_8list;
 151                 do {
 152                         int irq = *irqp;
 153                         if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
 154                                 autoirq_setup(0);
 155                                 /* Twinkle the interrupt, and check if it's seen. */
 156                                 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
 157                                 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
 158                                 if (irq == autoirq_report(0)             /* It's a good IRQ line! */
 159                                         && request_irq (irq, &ei_interrupt, 0, "hp", NULL) == 0) {
 160                                         printk(" selecting IRQ %d.\n", irq);
 161                                         dev->irq = *irqp;
 162                                         break;
 163                                 }
 164                         }
 165                 } while (*++irqp);
 166                 if (*irqp == 0) {
 167                         printk(" no free IRQ lines.\n");
 168                         return EBUSY;
 169                 }
 170         } else {
 171                 if (dev->irq == 2)
 172                         dev->irq = 9;
 173                 if (request_irq(dev->irq, ei_interrupt, 0, "hp", NULL)) {
 174                         printk (" unable to get IRQ %d.\n", dev->irq);
 175                         return EBUSY;
 176                 }
 177         }
 178 
 179         /* Allocate dev->priv and fill in 8390 specific dev fields. */
 180         if (ethdev_init(dev)) {
 181                 printk (" unable to get memory for dev->priv.\n");
 182                 free_irq(dev->irq, NULL);
 183                 return -ENOMEM;
 184         }
 185 
 186         /* Grab the region so we can find another board if something fails. */
 187         request_region(ioaddr, HP_IO_EXTENT,"hp");
 188 
 189         /* Set the base address to point to the NIC, not the "real" base! */
 190         dev->base_addr = ioaddr + NIC_OFFSET;
 191         dev->open = &hp_open;
 192         dev->stop = &hp_close;
 193 
 194         ei_status.name = name;
 195         ei_status.word16 = wordmode;
 196         ei_status.tx_start_page = HP_START_PG;
 197         ei_status.rx_start_page = HP_START_PG + TX_PAGES;
 198         ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
 199 
 200         ei_status.reset_8390 = &hp_reset_8390;
 201         ei_status.get_8390_hdr = &hp_get_8390_hdr;
 202         ei_status.block_input = &hp_block_input;
 203         ei_status.block_output = &hp_block_output;
 204         hp_init_card(dev);
 205 
 206         return 0;
 207 }
 208 
 209 static int
 210 hp_open(struct device *dev)
     /*  */
 211 {
 212         ei_open(dev);
 213         MOD_INC_USE_COUNT;
 214         return 0;
 215 }
 216 
 217 static int
 218 hp_close(struct device *dev)
     /*  */
 219 {
 220         ei_close(dev);
 221         MOD_DEC_USE_COUNT;
 222         return 0;
 223 }
 224 
 225 static void
 226 hp_reset_8390(struct device *dev)
     /*  */
 227 {
 228         int hp_base = dev->base_addr - NIC_OFFSET;
 229         int saved_config = inb_p(hp_base + HP_CONFIGURE);
 230 
 231         if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
 232         outb_p(0x00, hp_base + HP_CONFIGURE);
 233         ei_status.txing = 0;
 234         /* Pause just a few cycles for the hardware reset to take place. */
 235         SLOW_DOWN_IO;
 236         SLOW_DOWN_IO;
 237 
 238         outb_p(saved_config, hp_base + HP_CONFIGURE);
 239         SLOW_DOWN_IO; SLOW_DOWN_IO;
 240         
 241         if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
 242                 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
 243 
 244         if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
 245         return;
 246 }
 247 
 248 static void
 249 hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
     /*  */
 250 {
 251         int nic_base = dev->base_addr;
 252         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 253 
 254         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 255         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 256         outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 257         outb_p(0, nic_base + EN0_RCNTHI);
 258         outb_p(0, nic_base + EN0_RSARLO);       /* On page boundary */
 259         outb_p(ring_page, nic_base + EN0_RSARHI);
 260         outb_p(E8390_RREAD+E8390_START, nic_base);
 261 
 262         if (ei_status.word16) 
 263           insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
 264         else 
 265           insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
 266 
 267         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 268 }
 269         
 270 /* Block input and output, similar to the Crynwr packet driver. If you are
 271    porting to a new ethercard look at the packet driver source for hints.
 272    The HP LAN doesn't use shared memory -- we put the packet
 273    out through the "remote DMA" dataport. */
 274 
 275 static void
 276 hp_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
     /*  */
 277 {
 278         int nic_base = dev->base_addr;
 279         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 280         int xfer_count = count;
 281         char *buf = skb->data;
 282 
 283         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 284         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 285         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 286         outb_p(count >> 8, nic_base + EN0_RCNTHI);
 287         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 288         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 289         outb_p(E8390_RREAD+E8390_START, nic_base);
 290         if (ei_status.word16) {
 291           insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
 292           if (count & 0x01)
 293                 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
 294         } else {
 295                 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 296         }
 297         /* This is for the ALPHA version only, remove for later releases. */
 298         if (ei_debug > 0) {                     /* DMA termination address check... */
 299           int high = inb_p(nic_base + EN0_RSARHI);
 300           int low = inb_p(nic_base + EN0_RSARLO);
 301           int addr = (high << 8) + low;
 302           /* Check only the lower 8 bits so we can ignore ring wrap. */
 303           if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
 304                 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
 305                            dev->name, ring_offset + xfer_count, addr);
 306         }
 307         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 308 }
 309 
 310 static void
 311 hp_block_output(struct device *dev, int count,
     /*  */
 312                                 const unsigned char *buf, const start_page)
 313 {
 314         int nic_base = dev->base_addr;
 315         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 316 
 317         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 318         /* Round the count up for word writes.  Do we need to do this?
 319            What effect will an odd byte count have on the 8390?
 320            I should check someday. */
 321         if (ei_status.word16 && (count & 0x01))
 322           count++;
 323         /* We should already be in page 0, but to be safe... */
 324         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
 325 
 326 #ifdef NE8390_RW_BUGFIX
 327         /* Handle the read-before-write bug the same way as the
 328            Crynwr packet driver -- the NatSemi method doesn't work. */
 329         outb_p(0x42, nic_base + EN0_RCNTLO);
 330         outb_p(0,       nic_base + EN0_RCNTHI);
 331         outb_p(0xff, nic_base + EN0_RSARLO);
 332         outb_p(0x00, nic_base + EN0_RSARHI);
 333 #define NE_CMD          0x00
 334         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 335         /* Make certain that the dummy read has occurred. */
 336         inb_p(0x61);
 337         inb_p(0x61);
 338 #endif
 339 
 340         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 341         outb_p(count >> 8,       nic_base + EN0_RCNTHI);
 342         outb_p(0x00, nic_base + EN0_RSARLO);
 343         outb_p(start_page, nic_base + EN0_RSARHI);
 344 
 345         outb_p(E8390_RWRITE+E8390_START, nic_base);
 346         if (ei_status.word16) {
 347                 /* Use the 'rep' sequence for 16 bit boards. */
 348                 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
 349         } else {
 350                 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 351         }
 352 
 353         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
 354 
 355         /* This is for the ALPHA version only, remove for later releases. */
 356         if (ei_debug > 0) {                     /* DMA termination address check... */
 357           int high = inb_p(nic_base + EN0_RSARHI);
 358           int low  = inb_p(nic_base + EN0_RSARLO);
 359           int addr = (high << 8) + low;
 360           if ((start_page << 8) + count != addr)
 361                 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
 362                            dev->name, (start_page << 8) + count, addr);
 363         }
 364         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 365         return;
 366 }
 367 
 368 /* This function resets the ethercard if something screws up. */
 369 static void
 370 hp_init_card(struct device *dev)
     /*  */
 371 {
 372         int irq = dev->irq;
 373         NS8390_init(dev, 0);
 374         outb_p(irqmap[irq&0x0f] | HP_RUN,
 375                    dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
 376         return;
 377 }
 378 
 379 #ifdef MODULE
 380 #define MAX_HP_CARDS    4       /* Max number of HP cards per module */
 381 #define NAMELEN         8       /* # of chars for storing dev->name */
 382 static char namelist[NAMELEN * MAX_HP_CARDS] = { 0, };
 383 static struct device dev_hp[MAX_HP_CARDS] = {
 384         {
 385                 NULL,           /* assign a chunk of namelist[] below */
 386                 0, 0, 0, 0,
 387                 0, 0,
 388                 0, 0, 0, NULL, NULL
 389         },
 390 };
 391 
 392 static int io[MAX_HP_CARDS] = { 0, };
 393 static int irq[MAX_HP_CARDS]  = { 0, };
 394 
 395 /* This is set up so that only a single autoprobe takes place per call.
 396 ISA device autoprobes on a running machine are not recommended. */
 397 int
 398 init_module(void)
     /*  */
 399 {
 400         int this_dev, found = 0;
 401 
 402         for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
 403                 struct device *dev = &dev_hp[this_dev];
 404                 dev->name = namelist+(NAMELEN*this_dev);
 405                 dev->irq = irq[this_dev];
 406                 dev->base_addr = io[this_dev];
 407                 dev->init = hp_probe;
 408                 if (io[this_dev] == 0)  {
 409                         if (this_dev != 0) break; /* only autoprobe 1st one */
 410                         printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
 411                 }
 412                 if (register_netdev(dev) != 0) {
 413                         printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
 414                         if (found != 0) return 0;       /* Got at least one. */
 415                         return -ENXIO;
 416                 }
 417                 found++;
 418         }
 419 
 420         return 0;
 421 }
 422 
 423 void
 424 cleanup_module(void)
     /*  */
 425 {
 426         int this_dev;
 427 
 428         for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
 429                 struct device *dev = &dev_hp[this_dev];
 430                 if (dev->priv != NULL) {
 431                         int ioaddr = dev->base_addr - NIC_OFFSET;
 432                         kfree(dev->priv);
 433                         dev->priv = NULL;
 434                         free_irq(dev->irq, NULL);
 435                         irq2dev_map[dev->irq] = NULL;
 436                         release_region(ioaddr, HP_IO_EXTENT);
 437                         unregister_netdev(dev);
 438                 }
 439         }
 440 }
 441 #endif /* MODULE */
 442 
 443 /*
 444  * Local variables:
 445  * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
 446  * version-control: t
 447  * kept-new-versions: 5
 448  * tab-width: 4
 449  * c-indent-level: 4
 450  * End:
 451  */
/* */
root/drivers/net/hp.c

DEFINITIONS
