drivers/net/3c503.c

/* */
This source file includes following definitions.
el2_probe
el2_pio_autoprobe
el2probe1
el2_open
el2_close
el2_reset_8390
el2_init_card
el2_block_output
el2_block_input
   1 /* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */
   2 /*
   3     Written 1992,1993 by Donald Becker.
   4 
   5     Copyright 1993 United States Government as represented by the
   6     Director, National Security Agency.  This software may be used and
   7     distributed according to the terms of the GNU Public License,
   8     incorporated herein by reference.
   9 
  10     This driver should work with the 3c503 and 3c503/16.  It should be used
  11     in shared memory mode for best performance, although it may also work
  12     in programmed-I/O mode.
  13 
  14     The Author may be reached as becker@super.org or
  15     C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
  16 */
  17 
  18 static char *version =
  19     "3c503.c:v0.99.15k 3/3/93 Donald Becker (becker@super.org)\n";
  20 
  21 #include <linux/config.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.h>
  24 #include <linux/errno.h>
  25 #include <asm/io.h>
  26 #include <asm/system.h>
  27 
  28 #include "dev.h"
  29 
  30 #include "8390.h"
  31 #include "3c503.h"
  32 
  33 int el2_probe(struct device *dev);
  34 int el2_pio_autoprobe(struct device *dev);
  35 int el2probe1(int ioaddr, struct device *dev);
  36 
  37 static int el2_open(struct device *dev);
  38 static int el2_close(struct device *dev);
  39 static void el2_reset_8390(struct device *dev);
  40 static void el2_init_card(struct device *dev);
  41 static void el2_block_output(struct device *dev, int count,
  42                              const unsigned char *buf, const start_page);
  43 static int el2_block_input(struct device *dev, int count, char *buf,
  44                            int ring_offset);
  45 
  46 
  47 /* This routine probes for a memory-mapped 3c503 board by looking for
  48    the "location register" at the end of the jumpered boot PROM space.
  49    This works even if a PROM isn't there.
  50 
  51    If the ethercard isn't found there is an optional probe for
  52    ethercard jumpered to programmed-I/O mode.
  53    */
  54 
  55 static int ports[] = {0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0};
  56 
  57 int
  58 el2_probe(struct device *dev)
     /*  */
  59 {
  60     int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0};
  61     short ioaddr = dev->base_addr;
  62 
  63     if (ioaddr < 0)
  64         return ENXIO;           /* Don't probe at all. */
  65     if (ioaddr > 0)
  66         return ! el2probe1(ioaddr, dev);
  67 
  68     for (addr = addrs; *addr; addr++) {
  69         int i;
  70         unsigned int base_bits = *(unsigned char *)*addr;
  71         /* Find first set bit. */
  72         for(i = 7; i >= 0; i--, base_bits >>= 1)
  73             if (base_bits & 0x1)
  74                 break;
  75         if (base_bits != 1)
  76             continue;
  77 #ifdef HAVE_PORTRESERVE
  78         if (check_region(ports[i], 16))
  79             continue;
  80 #endif
  81         if (el2probe1(ports[i], dev))
  82             return 0;
  83     }
  84 #ifndef no_probe_nonshared_memory
  85     return el2_pio_autoprobe(dev);
  86 #else
  87     return ENODEV;
  88 #endif
  89 }
  90 
  91 /*  Try all of the locations that aren't obviously empty.  This touches
  92     a lot of locations, and is much riskier than the code above. */
  93 int
  94 el2_pio_autoprobe(struct device *dev)
     /*  */
  95 {
  96     int i;
  97     for (i = 0; i < 8; i++) {
  98 #ifdef HAVE_PORTRESERVE
  99         if (check_region(ports[i], 16))
 100             continue;
 101 #endif
 102         /* Reset and/or avoid any lurking NE2000 */
 103         if (inb_p(ports[i] + 0x408) == 0xff)
 104             continue;
 105         if (inb(ports[i] + 0x403) == (0x80 >> i) /* Preliminary check */
 106             && el2probe1(ports[i], dev))
 107             return 0;
 108     }
 109     return ENODEV;
 110 }
 111 
 112 /* Probe for the Etherlink II card at I/O port base IOADDR,
 113    returning non-zero on sucess.  If found, set the station
 114    address and memory parameters in DEVICE. */
 115 int
 116 el2probe1(int ioaddr, struct device *dev)
     /*  */
 117 {
 118     int i, iobase_reg, membase_reg, saved_406;
 119     unsigned char *station_addr = dev->dev_addr;
 120 
 121     /* We verify that it's a 3C503 board by checking the first three octets
 122        of its ethernet address. */
 123     printk("3c503 probe at %#3x:", ioaddr);
 124     iobase_reg = inb(ioaddr+0x403);
 125     membase_reg = inb(ioaddr+0x404);
 126     /* Verify ASIC register that should be 0 or have a single bit set. */
 127     if (   (iobase_reg  & (iobase_reg - 1))
 128         || (membase_reg & (membase_reg - 1))) {
 129         printk("  not found.\n");
 130         return 0;
 131     }
 132     saved_406 = inb_p(ioaddr + 0x406);
 133     outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */
 134     outb_p(ECNTRL_THIN, ioaddr + 0x406);
 135     /* Map the station addr PROM into the lower I/O ports. */
 136     outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406);
 137     for (i = 0; i < ETHER_ADDR_LEN; i++) {
 138         printk(" %2.2X", (station_addr[i] = inb(ioaddr + i)));
 139     }
 140     if ( station_addr[0] != 0x02
 141         || station_addr[1] != 0x60
 142         || station_addr[2] != 0x8c) {
 143         printk("  3C503 not found.\n");
 144         /* Restore the register we frobbed. */
 145         outb(saved_406, ioaddr + 0x406);
 146         return 0;
 147     }
 148 
 149 #ifdef HAVE_PORTRESERVE
 150     snarf_region(ioaddr, 16);
 151 #endif
 152     ethdev_init(dev);
 153 
 154     /* Map the 8390 back into the window. */
 155     outb(ECNTRL_THIN, ioaddr + 0x406);
 156     dev->base_addr = ioaddr;
 157     /* Probe for, turn on and clear the board's shared memory. */
 158     if (ei_debug > 2) printk(" memory jumpers %2.2x ", membase_reg);
 159     outb(EGACFR_NORM, ioaddr + 0x405);  /* Enable RAM */
 160 
 161     /* This should be probed for (or set via an ioctl()) at run-time.
 162        Right now we use a sleazy hack to pass in the interface number
 163        at boot-time via the low bits of the mem_end field.  That value is
 164        unused, and the low bits would be discarded even if it was used. */
 165 #if defined(EI8390_THICK) || defined(EL2_AUI)
 166     ei_status.interface_num = 1;
 167 #else
 168     ei_status.interface_num = dev->mem_end & 0xf;
 169 #endif
 170 
 171     if ((membase_reg & 0xf0) == 0) {
 172         dev->mem_start = 0;
 173     } else {
 174         dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) +
 175             ((membase_reg & 0xA0) ? 0x4000 : 0);
 176 
 177 #define EL2_MEMSIZE (EL2SM_STOP_PG - EL2SM_START_PG)*256
 178 #ifdef EL2MEMTEST
 179         /* This has never found an error, but someone might care. */
 180         {                       /* Check the card's memory. */
 181             int *mem_base = (int *)dev->mem_start;
 182             int memtest_value = 0xbbadf00d;
 183             mem_base[0] = 0xba5eba5e;
 184             for (i = 1; i < EL2_MEMSIZE/sizeof(mem_base[0]); i++) {
 185                 mem_base[i] = memtest_value;
 186                 if (mem_base[0] != 0xba5eba5e
 187                     || mem_base[i] != memtest_value) {
 188                     printk(" memory failure or memory address conflict.\n");
 189                     dev->mem_start = 0;
 190                     break;
 191                 }
 192                 memtest_value += 0x55555555;
 193                 mem_base[i] = 0;
 194             }
 195         }
 196 #endif  /* EL2MEMTEST */
 197         /* Divide the on-board memory into a single maximum-sized transmit
 198            (double-sized for ping-pong transmit) buffer at the base, and
 199            use the rest as a receive ring. */
 200         dev->mem_end = dev->rmem_end = dev->mem_start + EL2_MEMSIZE;
 201         dev->rmem_start = TX_PAGES*256 + dev->mem_start;
 202     }
 203 
 204     /* Finish setting the board's parameters. */
 205     ei_status.name = "3C503";
 206     ei_status.tx_start_page = EL2SM_START_PG;
 207     ei_status.rx_start_page = EL2SM_START_PG + TX_PAGES;
 208     ei_status.stop_page = EL2SM_STOP_PG;
 209     ei_status.reset_8390 = &el2_reset_8390;
 210     ei_status.block_input = &el2_block_input;
 211     ei_status.block_output = &el2_block_output;
 212 
 213     if (dev->irq == 2)
 214         dev->irq = 9;
 215     else if (dev->irq > 5 && dev->irq != 9) {
 216         printk("\n3c503: configured interrupt %d invalid, using autoIRQ.\n",
 217                dev->irq);
 218         dev->irq = 0;
 219     }
 220 
 221     ei_status.saved_irq = dev->irq;
 222 
 223     dev->start = 0;
 224     dev->open = &el2_open;
 225     dev->stop = &el2_close;
 226 
 227     if (dev->mem_start)
 228         printk("\n%s: %s with shared memory at %#6lx-%#6lx,\n",
 229                dev->name, ei_status.name, dev->mem_start, dev->mem_end-1);
 230     else
 231         printk("\n%s: %s using programmed I/O (REJUMPER for SHARED MEMORY).\n",
 232                dev->name, ei_status.name);
 233     if (ei_debug > 1)
 234         printk(version);
 235 
 236     return ioaddr;
 237 }
 238 
 239 static int
 240 el2_open(struct device *dev)
     /*  */
 241 {
 242 
 243     if (dev->irq < 2) {
 244         int irqlist[] = {5, 9, 3, 4, 0};
 245         int *irqp = irqlist;
 246 
 247         outb(EGACFR_NORM, E33G_GACFR);  /* Enable RAM and interrupts. */
 248         do {
 249             if (request_irq (*irqp, NULL) != -EBUSY) {
 250                 /* Twinkle the interrupt, and check if it's seen. */
 251                 autoirq_setup(0);
 252                 outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR);
 253                 outb_p(0x00, E33G_IDCFR);
 254                 if (*irqp == autoirq_report(0)   /* It's a good IRQ line! */
 255                     && request_irq (dev->irq = *irqp, &ei_interrupt) == 0)
 256                     break;
 257             }
 258         } while (*++irqp);
 259         if (*irqp == 0) {
 260             outb(EGACFR_IRQOFF, E33G_GACFR);    /* disable interrupts. */
 261             return -EAGAIN;
 262         }
 263     } else {
 264         if (request_irq(dev->irq, &ei_interrupt)) {
 265             return -EAGAIN;
 266         }
 267     }
 268     el2_init_card(dev);
 269     return ei_open(dev);
 270 }
 271 
 272 static int
 273 el2_close(struct device *dev)
     /*  */
 274 {
 275     free_irq(dev->irq);
 276     dev->irq = ei_status.saved_irq;
 277     irq2dev_map[dev->irq] = NULL;
 278     outb(EGACFR_IRQOFF, E33G_GACFR);    /* disable interrupts. */
 279 
 280     NS8390_init(dev, 0);
 281 
 282     return 0;
 283 }
 284 
 285 /* This is called whenever we have a unrecoverable failure:
 286        transmit timeout
 287        Bad ring buffer packet header
 288  */
 289 static void
 290 el2_reset_8390(struct device *dev)
     /*  */
 291 {
 292     if (ei_debug > 1) {
 293         printk("%s: Resetting the 3c503 board...", dev->name);
 294         printk("%#x=%#02x %#x=%#02x %#x=%#02x...", E33G_IDCFR, inb(E33G_IDCFR),
 295                E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR));
 296     }
 297     outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL);
 298     ei_status.txing = 0;
 299     outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
 300     el2_init_card(dev);
 301     if (ei_debug > 1) printk("done\n");
 302 }
 303 
 304 /* Initialize the 3c503 GA registers after a reset. */
 305 static void
 306 el2_init_card(struct device *dev)
     /*  */
 307 {
 308     /* Unmap the station PROM and select the DIX or BNC connector. */
 309     outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
 310 
 311     /* Set ASIC copy of rx's first and last+1 buffer pages */
 312     /* These must be the same as in the 8390. */
 313     outb(ei_status.rx_start_page, E33G_STARTPG);
 314     outb(ei_status.stop_page,  E33G_STOPPG);
 315 
 316     /* Point the vector pointer registers somewhere ?harmless?. */
 317     outb(0xff, E33G_VP2);       /* Point at the ROM restart location 0xffff0 */
 318     outb(0xff, E33G_VP1);
 319     outb(0x00, E33G_VP0);
 320     /* Turn off all interrupts until we're opened. */
 321     outb_p(0x00,  dev->base_addr + EN0_IMR);
 322     /* Enable IRQs iff started. */
 323     outb(EGACFR_NORM, E33G_GACFR);
 324 
 325     /* Set the interrupt line. */
 326     outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR);
 327     outb_p(8, E33G_DRQCNT);             /* Set burst size to 8 */
 328     outb_p(0x20, E33G_DMAAH);   /* Put a valid addr in the GA DMA */
 329     outb_p(0x00, E33G_DMAAL);
 330     return;                     /* We always succeed */
 331 }
 332 
 333 /* Either use the shared memory (if enabled on the board) or put the packet
 334    out through the ASIC FIFO.  The latter is probably much slower. */
 335 static void
 336 el2_block_output(struct device *dev, int count,
     /*  */
 337                  const unsigned char *buf, const start_page)
 338 {
 339     int i;                              /* Buffer index */
 340     int boguscount = 0;         /* timeout counter */
 341 
 342     /* This should really be set with during an open(). */
 343     outb(EGACFR_NORM, E33G_GACFR);      /* Enable RAM and interrupts. */
 344 
 345     if (dev->mem_start) {       /* Shared memory transfer */
 346         void *dest_addr = (void *)(dev->mem_start +
 347             ((start_page - ei_status.tx_start_page) << 8));
 348         memcpy(dest_addr, buf, count);
 349         if (ei_debug > 2  &&  memcmp(dest_addr, buf, count))
 350             printk("%s: 3c503 send_packet() bad memory copy @ %#5x.\n",
 351                    dev->name, (int) dest_addr);
 352         return;
 353     }
 354     /* No shared memory, put the packet out the slow way. */
 355     /* Set up then start the internal memory transfer to Tx Start Page */
 356     outb(0x00, E33G_DMAAL);
 357     outb_p(start_page, E33G_DMAAH);
 358     outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT
 359            | ECNTRL_START, E33G_CNTRL);
 360 
 361     /* This is the byte copy loop: it should probably be tuned for
 362        for speed once everything is working.  I think it is possible
 363        to output 8 bytes between each check of the status bit. */
 364     for(i = 0; i < count; i++) {
 365         if (i % 8 == 0)
 366             while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
 367                 if (++boguscount > (i<<3) + 32) {
 368                     printk("%s: FIFO blocked in el2_block_output (at %d of %d, bc=%d).\n",
 369                            dev->name, i, count, boguscount);
 370                     return;
 371                 }
 372         outb(buf[i], E33G_FIFOH);
 373     }
 374     outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
 375     return;
 376 }
 377 
 378 /* Returns the new ring pointer. */
 379 static int
 380 el2_block_input(struct device *dev, int count, char *buf, int ring_offset)
     /*  */
 381 {
 382     int boguscount = 0;
 383     int end_of_ring = dev->rmem_end;
 384     unsigned int i;
 385 
 386     /* Maybe enable shared memory just be to be safe... nahh.*/
 387     if (dev->mem_start) {       /* Use the shared memory. */
 388         ring_offset -= (EL2SM_START_PG<<8);
 389         if (dev->mem_start + ring_offset + count > end_of_ring) {
 390             /* We must wrap the input move. */
 391             int semi_count = end_of_ring - (dev->mem_start + ring_offset);
 392             memcpy(buf, (char *)dev->mem_start + ring_offset, semi_count);
 393             count -= semi_count;
 394             memcpy(buf + semi_count, (char *)dev->rmem_start, count);
 395             return dev->rmem_start + count;
 396         }
 397         memcpy(buf, (char *)dev->mem_start + ring_offset, count);
 398         return ring_offset + count;
 399     }
 400     /* No shared memory, use programmed I/O. */
 401     outb(ring_offset & 0xff, E33G_DMAAL);
 402     outb_p((ring_offset >> 8) & 0xff, E33G_DMAAH);
 403     outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT
 404            | ECNTRL_START, E33G_CNTRL);
 405 
 406     /* This is the byte copy loop: it should probably be tuned for
 407        for speed once everything is working. */
 408     for(i = 0; i < count; i++) {
 409         if (i % 8 == 0)
 410             while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
 411                 if (++boguscount > (i<<3) + 32) {
 412                     printk("%s: FIFO blocked in el2_block_input() (at %d of %d, bc=%d).\n",
 413                            dev->name, i, count, boguscount);
 414                     boguscount = 0;
 415                     break;
 416                 }
 417         buf[i] = inb_p(E33G_FIFOH);
 418     }
 419     outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
 420     return 0;
 421 }
 422 
 423 /*
 424  * Local variables:
 425  *  version-control: t
 426  *  kept-new-versions: 5
 427  * End:
 428  */
/* */
root/drivers/net/3c503.c

DEFINITIONS
