drivers/net/hp.c

/* */
This source file includes following definitions.
hp_probe
hpprobe1
hp_reset_8390
hp_block_input
hp_block_output
hp_init_card
   1 /* hp.c: A HP LAN ethernet driver for linux. */
   2 /*
   3         Written 1993 by Donald Becker.
   4         Copyright 1993 United States Government as represented by the
   5         Director, National Security Agency.      This software may be used and
   6         distributed according to the terms of the GNU Public License,
   7         incorporated herein by reference.
   8 
   9         This is a driver for the HP LAN adaptors.
  10 
  11         The Author may be reached as becker@super.org or
  12         C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
  13 */
  14 
  15 static char *version =
  16         "hp.c:v0.99.15k 3/3/94 Donald Becker (becker@super.org)\n";
  17 
  18 #include <linux/config.h>
  19 #include <linux/kernel.h>
  20 #include <linux/sched.h>
  21 #include <linux/errno.h>
  22 #include <linux/ioport.h>
  23 #include <asm/system.h>
  24 #include <asm/io.h>
  25 
  26 #include <linux/netdevice.h>
  27 #include "8390.h"
  28 
  29 #ifndef HAVE_PORTRESERVE
  30 #define check_region(ioaddr, size)                              0
  31 #define snarf_region(ioaddr, size);                             do ; while (0)
  32 #endif
  33 
  34 #define HP_IO_EXTENT    32
  35 
  36 #define HP_DATAPORT             0x0c    /* "Remote DMA" data port. */
  37 #define HP_ID                   0x07
  38 #define HP_CONFIGURE    0x08    /* Configuration register. */
  39 #define  HP_RUN                 0x01    /* 1 == Run, 0 == reset. */
  40 #define  HP_IRQ                 0x0E    /* Mask for software-configured IRQ line. */
  41 #define  HP_DATAON              0x10    /* Turn on dataport */
  42 #define NIC_OFFSET              0x10    /* Offset the 8390 registers. */
  43 
  44 #define HP_START_PG             0x00    /* First page of TX buffer */
  45 #define HP_8BSTOP_PG    0x80    /* Last page +1 of RX ring */
  46 #define HP_16BSTOP_PG   0xFF    /* Same, for 16 bit cards. */
  47 
  48 int hp_probe(struct device *dev);
  49 int hpprobe1(struct device *dev, int ioaddr);
  50 
  51 static void hp_reset_8390(struct device *dev);
  52 static int hp_block_input(struct device *dev, int count,
  53                                                   char *buf, int ring_offset);
  54 static void hp_block_output(struct device *dev, int count,
  55                                                         const unsigned char *buf, const start_page);
  56 static void hp_init_card(struct device *dev);
  57 
  58 /* The map from IRQ number to HP_CONFIGURE register setting. */
  59 /* My default is IRQ5      0  1  2  3  4  5  6  7  8  9 10 11 */
  60 static char irqmap[16] = { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
  61 
  62 
  63 /*      Probe for an HP LAN adaptor.
  64         Also initialize the card and fill in STATION_ADDR with the station
  65         address. */
  66 
  67 int hp_probe(struct device *dev)
     /*  */
  68 {
  69         int *port, ports[] = {0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
  70         short ioaddr = dev->base_addr;
  71 
  72         if (ioaddr > 0x1ff)                     /* Check a single specified location. */
  73                 return hpprobe1(dev, ioaddr);
  74         else if (ioaddr > 0)                            /* Don't probe at all. */
  75                 return ENXIO;
  76 
  77         for (port = &ports[0]; *port; port++) {
  78                 if (check_region(*port, HP_IO_EXTENT))
  79                         continue;
  80                 if (hpprobe1(dev, *port) == 0) {
  81                         return 0;
  82                 }
  83         }
  84         return ENODEV;
  85 }
  86 
  87 int hpprobe1(struct device *dev, int ioaddr)
     /*  */
  88 {
  89         int i, board_id, wordmode;
  90         char *name;
  91         unsigned char *station_addr = dev->dev_addr;
  92 
  93         /* Check for the HP physical address, 08 00 09 xx xx xx. */
  94         /* This really isn't good enough: we may pick up HP LANCE boards
  95            also!  Avoid the lance 0x5757 signature. */
  96         if (inb(ioaddr) != 0x08
  97                 || inb(ioaddr+1) != 0x00
  98                 || inb(ioaddr+2) != 0x09
  99                 || inb(ioaddr+14) == 0x57)
 100                 return ENODEV;
 101 
 102         /* Set up the parameters based on the board ID.
 103            If you have additional mappings, please mail them to becker@super.org. */
 104         if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
 105                 name = "HP27247";
 106                 wordmode = 1;
 107         } else {
 108                 name = "HP27250";
 109                 wordmode = 0;
 110         }
 111 
 112         /* Grab the region so we can find another board if something fails. */
 113         snarf_region(ioaddr, HP_IO_EXTENT);
 114 
 115         printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
 116 
 117         for(i = 0; i < ETHER_ADDR_LEN; i++)
 118                 printk(" %2.2x", station_addr[i] = inb(ioaddr + i));
 119 
 120         /* Snarf the interrupt now.  Someday this could be moved to open(). */
 121         if (dev->irq < 2) {
 122                 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
 123                 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
 124                 int *irqp = wordmode ? irq_16list : irq_8list;
 125                 do {
 126                         int irq = *irqp;
 127                         if (request_irq (irq, NULL, 0, "bogus") != -EBUSY) {
 128                                 autoirq_setup(0);
 129                                 /* Twinkle the interrupt, and check if it's seen. */
 130                                 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
 131                                 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
 132                                 if (irq == autoirq_report(0)             /* It's a good IRQ line! */
 133                                         && request_irq (irq, &ei_interrupt, 0, "hp") == 0) {
 134                                         printk(" selecting IRQ %d.\n", irq);
 135                                         dev->irq = *irqp;
 136                                         break;
 137                                 }
 138                         }
 139                 } while (*++irqp);
 140                 if (*irqp == 0) {
 141                         printk(" no free IRQ lines.\n");
 142                         return EBUSY;
 143                 }
 144         } else {
 145                 if (dev->irq == 2)
 146                         dev->irq = 9;
 147                 if (request_irq(dev->irq, ei_interrupt, 0, "hp")) {
 148                         printk (" unable to get IRQ %d.\n", dev->irq);
 149                         return EBUSY;
 150                 }
 151         }
 152 
 153         if (ei_debug > 1)
 154                 printk(version);
 155 
 156         /* Set the base address to point to the NIC, not the "real" base! */
 157         dev->base_addr = ioaddr + NIC_OFFSET;
 158 
 159         ethdev_init(dev);
 160 
 161         ei_status.name = name;
 162         ei_status.word16 = wordmode;
 163         ei_status.tx_start_page = HP_START_PG;
 164         ei_status.rx_start_page = HP_START_PG + TX_PAGES;
 165         ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
 166 
 167         ei_status.reset_8390 = &hp_reset_8390;
 168         ei_status.block_input = &hp_block_input;
 169         ei_status.block_output = &hp_block_output;
 170         hp_init_card(dev);
 171 
 172         return 0;
 173 }
 174 
 175 static void
 176 hp_reset_8390(struct device *dev)
     /*  */
 177 {
 178         int hp_base = dev->base_addr - NIC_OFFSET;
 179         int saved_config = inb_p(hp_base + HP_CONFIGURE);
 180 
 181         if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
 182         outb_p(0x00, hp_base + HP_CONFIGURE);
 183         ei_status.txing = 0;
 184         /* Pause just a few cycles for the hardware reset to take place. */
 185         SLOW_DOWN_IO;
 186         SLOW_DOWN_IO;
 187 
 188         outb_p(saved_config, hp_base + HP_CONFIGURE);
 189         SLOW_DOWN_IO; SLOW_DOWN_IO;
 190         
 191         if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
 192                 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
 193 
 194         if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
 195         return;
 196 }
 197 
 198 /* Block input and output, similar to the Crynwr packet driver.  If you
 199    porting to a new ethercard look at the packet driver source for hints.
 200    The HP LAN doesn't use shared memory -- we put the packet
 201    out through the "remote DMA" dataport. */
 202 
 203 static int
 204 hp_block_input(struct device *dev, int count, char *buf, int ring_offset)
     /*  */
 205 {
 206         int nic_base = dev->base_addr;
 207         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 208         int xfer_count = count;
 209 
 210         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 211         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
 212         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 213         outb_p(count >> 8, nic_base + EN0_RCNTHI);
 214         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 215         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 216         outb_p(E8390_RREAD+E8390_START, nic_base);
 217         if (ei_status.word16) {
 218           insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
 219           if (count & 0x01)
 220                 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
 221         } else {
 222                 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 223         }
 224         /* This is for the ALPHA version only, remove for later releases. */
 225         if (ei_debug > 0) {                     /* DMA termination address check... */
 226           int high = inb_p(nic_base + EN0_RSARHI);
 227           int low = inb_p(nic_base + EN0_RSARLO);
 228           int addr = (high << 8) + low;
 229           /* Check only the lower 8 bits so we can ignore ring wrap. */
 230           if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
 231                 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
 232                            dev->name, ring_offset + xfer_count, addr);
 233         }
 234         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 235         return ring_offset + count;
 236 }
 237 
 238 static void
 239 hp_block_output(struct device *dev, int count,
     /*  */
 240                                 const unsigned char *buf, const start_page)
 241 {
 242         int nic_base = dev->base_addr;
 243         int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
 244 
 245         outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
 246         /* Round the count up for word writes.  Do we need to do this?
 247            What effect will an odd byte count have on the 8390?
 248            I should check someday. */
 249         if (ei_status.word16 && (count & 0x01))
 250           count++;
 251         /* We should already be in page 0, but to be safe... */
 252         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
 253 
 254 #ifdef ei8390_bug
 255         /* Handle the read-before-write bug the same way as the
 256            Crynwr packet driver -- the NatSemi method doesn't work. */
 257         outb_p(0x42, nic_base + EN0_RCNTLO);
 258         outb_p(0,       nic_base + EN0_RCNTHI);
 259         outb_p(0xff, nic_base + EN0_RSARLO);
 260         outb_p(0x00, nic_base + EN0_RSARHI);
 261         outb_p(E8390_RREAD+E8390_START, EN_CMD);
 262         /* Make certain that the dummy read has occured. */
 263         inb_p(0x61);
 264         inb_p(0x61);
 265 #endif
 266 
 267         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 268         outb_p(count >> 8,       nic_base + EN0_RCNTHI);
 269         outb_p(0x00, nic_base + EN0_RSARLO);
 270         outb_p(start_page, nic_base + EN0_RSARHI);
 271 
 272         outb_p(E8390_RWRITE+E8390_START, nic_base);
 273         if (ei_status.word16) {
 274                 /* Use the 'rep' sequence for 16 bit boards. */
 275                 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
 276         } else {
 277                 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
 278         }
 279 
 280         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
 281 
 282         /* This is for the ALPHA version only, remove for later releases. */
 283         if (ei_debug > 0) {                     /* DMA termination address check... */
 284           int high = inb_p(nic_base + EN0_RSARHI);
 285           int low  = inb_p(nic_base + EN0_RSARLO);
 286           int addr = (high << 8) + low;
 287           if ((start_page << 8) + count != addr)
 288                 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
 289                            dev->name, (start_page << 8) + count, addr);
 290         }
 291         outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
 292         return;
 293 }
 294 
 295 /* This function resets the ethercard if something screws up. */
 296 static void
 297 hp_init_card(struct device *dev)
     /*  */
 298 {
 299         int irq = dev->irq;
 300         NS8390_init(dev, 0);
 301         outb_p(irqmap[irq&0x0f] | HP_RUN,
 302                    dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
 303         return;
 304 }
 305 
 306 
 307 /*
 308  * Local variables:
 309  * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
 310  * version-control: t
 311  * kept-new-versions: 5
 312  * tab-width: 4
 313  * c-indent-level: 4
 314  * End:
 315  */
/* */
root/drivers/net/hp.c

DEFINITIONS
