drivers/net/es3210.c

   1 /*
   2         es3210.c
   3
   4         Linux driver for Racal-Interlan ES3210 EISA Network Adapter
   5
   6         Copyright (C) 1996, Paul Gortmaker.
   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         Information and Code Sources:
  12
  13         1) The existing myriad of Linux 8390 drivers written by Donald Becker.
  14
  15         2) Once again Russ Nelson's asm packet driver provided additional info.
  16
  17         3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
  18            Too bad it doesn't work -- see below.
  19
  20         The ES3210 is an EISA shared memory NS8390 implementation. Note
  21         that all memory copies to/from the board must be 32bit transfers.
  22         Which rules out using eth_io_copy_and_sum() in this driver.
  23
  24         Apparently there are two slightly different revisions of the
  25         card, since there are two distinct EISA cfg files (!rii0101.cfg
  26         and !rii0102.cfg) One has media select in the cfg file and the
  27         other doesn't. Hopefully this will work with either.
  28
  29         That is about all I can tell you about it, having never actually
  30         even seen one of these cards. :)  Try http://www.interlan.com
  31         if you want more info.
  32
  33         Thanks go to Mark Salazar for testing v0.02 of this driver.
  34
  35         Bugs, to-fix, etc:
  36
  37         1) The EISA cfg ports that are *supposed* to have the IRQ and shared
  38            mem values just read 0xff all the time. Hrrmpf. Apparently the
  39            same happens with the packet driver as the code for reading
  40            these registers is disabled there. In the meantime, boot with:
  41            ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and
  42            shared memory detection. (The i/o port detection is okay.)
  43
  44         2) Module support currently untested. Probably works though.
  45
  46 */
  47
  48 static const char version[] =
  49         "es3210.c: Driver revision v0.03, 14/09/96\n";
  50
  51 #include <linux/module.h>
  52 #include <linux/eisa.h>
  53 #include <linux/kernel.h>
  54 #include <linux/errno.h>
  55 #include <linux/string.h>
  56 #include <linux/init.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/etherdevice.h>
  59
  60 #include <asm/io.h>
  61 #include <asm/system.h>
  62
  63 #include "8390.h"
  64
  65 static int es_probe1(struct net_device *dev, int ioaddr);
  66
  67 static void es_reset_8390(struct net_device *dev);
  68
  69 static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
  70 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
  71 static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page);
  72
  73 #define ES_START_PG     0x00    /* First page of TX buffer              */
  74 #define ES_STOP_PG      0x40    /* Last page +1 of RX ring              */
  75
  76 #define ES_IO_EXTENT    0x37    /* The cfg file says 0xc90 -> 0xcc7     */
  77 #define ES_ID_PORT      0xc80   /* Same for all EISA cards              */
  78 #define ES_SA_PROM      0xc90   /* Start of e'net addr.                 */
  79 #define ES_RESET_PORT   0xc84   /* From the packet driver source        */
  80 #define ES_NIC_OFFSET   0xca0   /* Hello, the 8390 is *here*            */
  81
  82 #define ES_ADDR0        0x02    /* 3 byte vendor prefix                 */
  83 #define ES_ADDR1        0x07
  84 #define ES_ADDR2        0x01
  85
  86 /*
  87  * Two card revisions. EISA ID's are always rev. minor, rev. major,, and
  88  * then the three vendor letters stored in 5 bits each, with an "a" = 1.
  89  * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
  90  * config utility determines automagically what config file(s) to use.
  91  */
  92 #define ES_EISA_ID1     0x01012949      /* !rii0101.cfg                 */
  93 #define ES_EISA_ID2     0x02012949      /* !rii0102.cfg                 */
  94
  95 #define ES_CFG1         0xcc0   /* IOPORT(1) --> IOPORT(6) in cfg file  */
  96 #define ES_CFG2         0xcc1
  97 #define ES_CFG3         0xcc2
  98 #define ES_CFG4         0xcc3
  99 #define ES_CFG5         0xcc4
 100 #define ES_CFG6         0xc84   /* NB: 0xc84 is also "reset" port.      */
 101
 102 /*
 103  *      You can OR any of the following bits together and assign it
 104  *      to ES_DEBUG to get verbose driver info during operation.
 105  *      Some of these don't do anything yet.
 106  */
 107
 108 #define ES_D_PROBE      0x01
 109 #define ES_D_RX_PKT     0x02
 110 #define ES_D_TX_PKT     0x04
 111 #define ED_D_IRQ        0x08
 112
 113 #define ES_DEBUG        0
 114
 115 static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10};
 116 static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15};
 117
 118 /*
 119  *      Probe for the card. The best way is to read the EISA ID if it
 120  *      is known. Then we check the prefix of the station address
 121  *      PROM for a match against the Racal-Interlan assigned value.
 122  */
 123
 124 static int __init do_es_probe(struct net_device *dev)
 125 {
 126         unsigned short ioaddr = dev->base_addr;
 127         int irq = dev->irq;
 128         int mem_start = dev->mem_start;
 129
 130         if (ioaddr > 0x1ff)             /* Check a single specified location. */
 131                 return es_probe1(dev, ioaddr);
 132         else if (ioaddr > 0)            /* Don't probe at all. */
 133                 return -ENXIO;
 134
 135         if (!EISA_bus) {
 136 #if ES_DEBUG & ES_D_PROBE
 137                 printk("es3210.c: Not EISA bus. Not probing high ports.\n");
 138 #endif
 139                 return -ENXIO;
 140         }
 141
 142         /* EISA spec allows for up to 16 slots, but 8 is typical. */
 143         for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
 144                 if (es_probe1(dev, ioaddr) == 0)
 145                         return 0;
 146                 dev->irq = irq;
 147                 dev->mem_start = mem_start;
 148         }
 149
 150         return -ENODEV;
 151 }
 152
 153 #ifndef MODULE
 154 struct net_device * __init es_probe(int unit)
 155 {
 156         struct net_device *dev = alloc_ei_netdev();
 157         int err;
 158
 159         if (!dev)
 160                 return ERR_PTR(-ENOMEM);
 161
 162         sprintf(dev->name, "eth%d", unit);
 163         netdev_boot_setup_check(dev);
 164
 165         err = do_es_probe(dev);
 166         if (err)
 167                 goto out;
 168         return dev;
 169 out:
 170         free_netdev(dev);
 171         return ERR_PTR(err);
 172 }
 173 #endif
 174
 175 static int __init es_probe1(struct net_device *dev, int ioaddr)
 176 {
 177         int i, retval;
 178         unsigned long eisa_id;
 179
 180         if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210"))
 181                 return -ENODEV;
 182
 183 #if ES_DEBUG & ES_D_PROBE
 184         printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT));
 185         printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n",
 186                 inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
 187                 inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
 188 #endif
 189
 190 /*      Check the EISA ID of the card. */
 191         eisa_id = inl(ioaddr + ES_ID_PORT);
 192         if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
 193                 retval = -ENODEV;
 194                 goto out;
 195         }
 196
 197         for (i = 0; i < ETHER_ADDR_LEN ; i++)
 198                 dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i);
 199
 200 /*      Check the Racal vendor ID as well. */
 201         if (dev->dev_addr[0] != ES_ADDR0 ||
 202             dev->dev_addr[1] != ES_ADDR1 ||
 203             dev->dev_addr[2] != ES_ADDR2) {
 204                 printk("es3210.c: card not found %pM (invalid_prefix).\n",
 205                        dev->dev_addr);
 206                 retval = -ENODEV;
 207                 goto out;
 208         }
 209
 210         printk("es3210.c: ES3210 rev. %ld at %#x, node %pM",
 211                eisa_id>>24, ioaddr, dev->dev_addr);
 212
 213         /* Snarf the interrupt now. */
 214         if (dev->irq == 0) {
 215                 unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
 216                 unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
 217
 218                 if (hi_irq != 0) {
 219                         dev->irq = hi_irq_map[hi_irq - 1];
 220                 } else {
 221                         int i = 0;
 222                         while (lo_irq > (1<<i)) i++;
 223                         dev->irq = lo_irq_map[i];
 224                 }
 225                 printk(" using IRQ %d", dev->irq);
 226 #if ES_DEBUG & ES_D_PROBE
 227                 printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n",
 228                                         hi_irq, lo_irq, dev->irq);
 229 #endif
 230         } else {
 231                 if (dev->irq == 2)
 232                         dev->irq = 9;                   /* Doh! */
 233                 printk(" assigning IRQ %d", dev->irq);
 234         }
 235
 236         if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) {
 237                 printk (" unable to get IRQ %d.\n", dev->irq);
 238                 retval = -EAGAIN;
 239                 goto out;
 240         }
 241
 242         if (dev->mem_start == 0) {
 243                 unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
 244                 unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
 245
 246                 if (mem_enabled != 0x80) {
 247                         printk(" shared mem disabled - giving up\n");
 248                         retval = -ENXIO;
 249                         goto out1;
 250                 }
 251                 dev->mem_start = 0xC0000 + mem_bits*0x4000;
 252                 printk(" using ");
 253         } else {
 254                 printk(" assigning ");
 255         }
 256
 257         ei_status.mem = ioremap(dev->mem_start, (ES_STOP_PG - ES_START_PG)*256);
 258         if (!ei_status.mem) {
 259                 printk("ioremap failed - giving up\n");
 260                 retval = -ENXIO;
 261                 goto out1;
 262         }
 263
 264         dev->mem_end = dev->mem_start + (ES_STOP_PG - ES_START_PG)*256;
 265
 266         printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1);
 267
 268 #if ES_DEBUG & ES_D_PROBE
 269         if (inb(ioaddr + ES_CFG5))
 270                 printk("es3210: Warning - DMA channel enabled, but not used here.\n");
 271 #endif
 272         /* Note, point at the 8390, and not the card... */
 273         dev->base_addr = ioaddr + ES_NIC_OFFSET;
 274
 275         ei_status.name = "ES3210";
 276         ei_status.tx_start_page = ES_START_PG;
 277         ei_status.rx_start_page = ES_START_PG + TX_PAGES;
 278         ei_status.stop_page = ES_STOP_PG;
 279         ei_status.word16 = 1;
 280
 281         if (ei_debug > 0)
 282                 printk(version);
 283
 284         ei_status.reset_8390 = &es_reset_8390;
 285         ei_status.block_input = &es_block_input;
 286         ei_status.block_output = &es_block_output;
 287         ei_status.get_8390_hdr = &es_get_8390_hdr;
 288
 289         dev->netdev_ops = &ei_netdev_ops;
 290         NS8390_init(dev, 0);
 291
 292         retval = register_netdev(dev);
 293         if (retval)
 294                 goto out1;
 295         return 0;
 296 out1:
 297         free_irq(dev->irq, dev);
 298 out:
 299         release_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT);
 300         return retval;
 301 }
 302
 303 /*
 304  *      Reset as per the packet driver method. Judging by the EISA cfg
 305  *      file, this just toggles the "Board Enable" bits (bit 2 and 0).
 306  */
 307
 308 static void es_reset_8390(struct net_device *dev)
 309 {
 310         unsigned short ioaddr = dev->base_addr;
 311         unsigned long end;
 312
 313         outb(0x04, ioaddr + ES_RESET_PORT);
 314         if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
 315
 316         end = jiffies + 2*HZ/100;
 317         while ((signed)(end - jiffies) > 0) continue;
 318
 319         ei_status.txing = 0;
 320         outb(0x01, ioaddr + ES_RESET_PORT);
 321         if (ei_debug > 1) printk("reset done\n");
 322
 323         return;
 324 }
 325
 326 /*
 327  *      Note: In the following three functions is the implicit assumption
 328  *      that the associated memcpy will only use "rep; movsl" as long as
 329  *      we keep the counts as some multiple of doublewords. This is a
 330  *      requirement of the hardware, and also prevents us from using
 331  *      eth_io_copy_and_sum() since we can't guarantee it will limit
 332  *      itself to doubleword access.
 333  */
 334
 335 /*
 336  *      Grab the 8390 specific header. Similar to the block_input routine, but
 337  *      we don't need to be concerned with ring wrap as the header will be at
 338  *      the start of a page, so we optimize accordingly. (A single doubleword.)
 339  */
 340
 341 static void
 342 es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 343 {
 344         void __iomem *hdr_start = ei_status.mem + ((ring_page - ES_START_PG)<<8);
 345         memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
 346         hdr->count = (hdr->count + 3) & ~3;     /* Round up allocation. */
 347 }
 348
 349 /*
 350  *      Block input and output are easy on shared memory ethercards, the only
 351  *      complication is when the ring buffer wraps. The count will already
 352  *      be rounded up to a doubleword value via es_get_8390_hdr() above.
 353  */
 354
 355 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb,
 356                                                   int ring_offset)
 357 {
 358         void __iomem *xfer_start = ei_status.mem + ring_offset - ES_START_PG*256;
 359
 360         if (ring_offset + count > ES_STOP_PG*256) {
 361                 /* Packet wraps over end of ring buffer. */
 362                 int semi_count = ES_STOP_PG*256 - ring_offset;
 363                 memcpy_fromio(skb->data, xfer_start, semi_count);
 364                 count -= semi_count;
 365                 memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
 366         } else {
 367                 /* Packet is in one chunk. */
 368                 memcpy_fromio(skb->data, xfer_start, count);
 369         }
 370 }
 371
 372 static void es_block_output(struct net_device *dev, int count,
 373                                 const unsigned char *buf, int start_page)
 374 {
 375         void __iomem *shmem = ei_status.mem + ((start_page - ES_START_PG)<<8);
 376
 377         count = (count + 3) & ~3;     /* Round up to doubleword */
 378         memcpy_toio(shmem, buf, count);
 379 }
 380
 381 #ifdef MODULE
 382 #define MAX_ES_CARDS    4       /* Max number of ES3210 cards per module */
 383 #define NAMELEN         8       /* # of chars for storing dev->name */
 384 static struct net_device *dev_es3210[MAX_ES_CARDS];
 385 static int io[MAX_ES_CARDS];
 386 static int irq[MAX_ES_CARDS];
 387 static int mem[MAX_ES_CARDS];
 388
 389 module_param_array(io, int, NULL, 0);
 390 module_param_array(irq, int, NULL, 0);
 391 module_param_array(mem, int, NULL, 0);
 392 MODULE_PARM_DESC(io, "I/O base address(es)");
 393 MODULE_PARM_DESC(irq, "IRQ number(s)");
 394 MODULE_PARM_DESC(mem, "memory base address(es)");
 395 MODULE_DESCRIPTION("Racal-Interlan ES3210 EISA ethernet driver");
 396 MODULE_LICENSE("GPL");
 397
 398 int __init init_module(void)
 399 {
 400         struct net_device *dev;
 401         int this_dev, found = 0;
 402
 403         for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
 404                 if (io[this_dev] == 0 && this_dev != 0)
 405                         break;
 406                 dev = alloc_ei_netdev();
 407                 if (!dev)
 408                         break;
 409                 dev->irq = irq[this_dev];
 410                 dev->base_addr = io[this_dev];
 411                 dev->mem_start = mem[this_dev];
 412                 if (do_es_probe(dev) == 0) {
 413                         dev_es3210[found++] = dev;
 414                         continue;
 415                 }
 416                 free_netdev(dev);
 417                 printk(KERN_WARNING "es3210.c: No es3210 card found (i/o = 0x%x).\n", io[this_dev]);
 418                 break;
 419         }
 420         if (found)
 421                 return 0;
 422         return -ENXIO;
 423 }
 424
 425 static void cleanup_card(struct net_device *dev)
 426 {
 427         free_irq(dev->irq, dev);
 428         release_region(dev->base_addr, ES_IO_EXTENT);
 429         iounmap(ei_status.mem);
 430 }
 431
 432 void __exit
 433 cleanup_module(void)
 434 {
 435         int this_dev;
 436
 437         for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
 438                 struct net_device *dev = dev_es3210[this_dev];
 439                 if (dev) {
 440                         unregister_netdev(dev);
 441                         cleanup_card(dev);
 442                         free_netdev(dev);
 443                 }
 444         }
 445 }
 446 #endif /* MODULE */
 447