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 int es_open(struct net_device *dev);
  68 static int es_close(struct net_device *dev);
  69
  70 static void es_reset_8390(struct net_device *dev);
  71
  72 static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
  73 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
  74 static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page);
  75
  76 #define ES_START_PG     0x00    /* First page of TX buffer              */
  77 #define ES_STOP_PG      0x40    /* Last page +1 of RX ring              */
  78
  79 #define ES_IO_EXTENT    0x37    /* The cfg file says 0xc90 -> 0xcc7     */
  80 #define ES_ID_PORT      0xc80   /* Same for all EISA cards              */
  81 #define ES_SA_PROM      0xc90   /* Start of e'net addr.                 */
  82 #define ES_RESET_PORT   0xc84   /* From the packet driver source        */
  83 #define ES_NIC_OFFSET   0xca0   /* Hello, the 8390 is *here*            */
  84
  85 #define ES_ADDR0        0x02    /* 3 byte vendor prefix                 */
  86 #define ES_ADDR1        0x07
  87 #define ES_ADDR2        0x01
  88
  89 /*
  90  * Two card revisions. EISA ID's are always rev. minor, rev. major,, and
  91  * then the three vendor letters stored in 5 bits each, with an "a" = 1.
  92  * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
  93  * config utility determines automagically what config file(s) to use.
  94  */
  95 #define ES_EISA_ID1     0x01012949      /* !rii0101.cfg                 */
  96 #define ES_EISA_ID2     0x02012949      /* !rii0102.cfg                 */
  97
  98 #define ES_CFG1         0xcc0   /* IOPORT(1) --> IOPORT(6) in cfg file  */
  99 #define ES_CFG2         0xcc1
 100 #define ES_CFG3         0xcc2
 101 #define ES_CFG4         0xcc3
 102 #define ES_CFG5         0xcc4
 103 #define ES_CFG6         0xc84   /* NB: 0xc84 is also "reset" port.      */
 104
 105 /*
 106  *      You can OR any of the following bits together and assign it
 107  *      to ES_DEBUG to get verbose driver info during operation.
 108  *      Some of these don't do anything yet.
 109  */
 110
 111 #define ES_D_PROBE      0x01
 112 #define ES_D_RX_PKT     0x02
 113 #define ES_D_TX_PKT     0x04
 114 #define ED_D_IRQ        0x08
 115
 116 #define ES_DEBUG        0
 117
 118 static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10};
 119 static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15};
 120
 121 /*
 122  *      Probe for the card. The best way is to read the EISA ID if it
 123  *      is known. Then we check the prefix of the station address
 124  *      PROM for a match against the Racal-Interlan assigned value.
 125  */
 126
 127 static int __init do_es_probe(struct net_device *dev)
 128 {
 129         unsigned short ioaddr = dev->base_addr;
 130         int irq = dev->irq;
 131         int mem_start = dev->mem_start;
 132
 133         SET_MODULE_OWNER(dev);
 134
 135         if (ioaddr > 0x1ff)             /* Check a single specified location. */
 136                 return es_probe1(dev, ioaddr);
 137         else if (ioaddr > 0)            /* Don't probe at all. */
 138                 return -ENXIO;
 139
 140         if (!EISA_bus) {
 141 #if ES_DEBUG & ES_D_PROBE
 142                 printk("es3210.c: Not EISA bus. Not probing high ports.\n");
 143 #endif
 144                 return -ENXIO;
 145         }
 146
 147         /* EISA spec allows for up to 16 slots, but 8 is typical. */
 148         for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
 149                 if (es_probe1(dev, ioaddr) == 0)
 150                         return 0;
 151                 dev->irq = irq;
 152                 dev->mem_start = mem_start;
 153         }
 154
 155         return -ENODEV;
 156 }
 157
 158 #ifndef MODULE
 159 struct net_device * __init es_probe(int unit)
 160 {
 161         struct net_device *dev = alloc_ei_netdev();
 162         int err;
 163
 164         if (!dev)
 165                 return ERR_PTR(-ENOMEM);
 166
 167         sprintf(dev->name, "eth%d", unit);
 168         netdev_boot_setup_check(dev);
 169
 170         err = do_es_probe(dev);
 171         if (err)
 172                 goto out;
 173         return dev;
 174 out:
 175         free_netdev(dev);
 176         return ERR_PTR(err);
 177 }
 178 #endif
 179
 180 static int __init es_probe1(struct net_device *dev, int ioaddr)
 181 {
 182         int i, retval;
 183         unsigned long eisa_id;
 184
 185         if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210"))
 186                 return -ENODEV;
 187
 188 #if ES_DEBUG & ES_D_PROBE
 189         printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT));
 190         printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n",
 191                 inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
 192                 inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
 193 #endif
 194
 195
 196 /*      Check the EISA ID of the card. */
 197         eisa_id = inl(ioaddr + ES_ID_PORT);
 198         if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
 199                 retval = -ENODEV;
 200                 goto out;
 201         }
 202
 203 /*      Check the Racal vendor ID as well. */
 204         if (inb(ioaddr + ES_SA_PROM + 0) != ES_ADDR0
 205                 || inb(ioaddr + ES_SA_PROM + 1) != ES_ADDR1
 206                 || inb(ioaddr + ES_SA_PROM + 2) != ES_ADDR2 ) {
 207                 printk("es3210.c: card not found");
 208                 for(i = 0; i < ETHER_ADDR_LEN; i++)
 209                         printk(" %02x", inb(ioaddr + ES_SA_PROM + i));
 210                 printk(" (invalid prefix).\n");
 211                 retval = -ENODEV;
 212                 goto out;
 213         }
 214
 215         printk("es3210.c: ES3210 rev. %ld at %#x, node", eisa_id>>24, ioaddr);
 216         for(i = 0; i < ETHER_ADDR_LEN; i++)
 217                 printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i)));
 218
 219         /* Snarf the interrupt now. */
 220         if (dev->irq == 0) {
 221                 unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
 222                 unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
 223
 224                 if (hi_irq != 0) {
 225                         dev->irq = hi_irq_map[hi_irq - 1];
 226                 } else {
 227                         int i = 0;
 228                         while (lo_irq > (1<<i)) i++;
 229                         dev->irq = lo_irq_map[i];
 230                 }
 231                 printk(" using IRQ %d", dev->irq);
 232 #if ES_DEBUG & ES_D_PROBE
 233                 printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n",
 234                                         hi_irq, lo_irq, dev->irq);
 235 #endif
 236         } else {
 237                 if (dev->irq == 2)
 238                         dev->irq = 9;                   /* Doh! */
 239                 printk(" assigning IRQ %d", dev->irq);
 240         }
 241
 242         if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) {
 243                 printk (" unable to get IRQ %d.\n", dev->irq);
 244                 retval = -EAGAIN;
 245                 goto out;
 246         }
 247
 248         if (dev->mem_start == 0) {
 249                 unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
 250                 unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
 251
 252                 if (mem_enabled != 0x80) {
 253                         printk(" shared mem disabled - giving up\n");
 254                         retval = -ENXIO;
 255                         goto out1;
 256                 }
 257                 dev->mem_start = 0xC0000 + mem_bits*0x4000;
 258                 printk(" using ");
 259         } else {
 260                 printk(" assigning ");
 261         }
 262
 263         ei_status.mem = ioremap(dev->mem_start, (ES_STOP_PG - ES_START_PG)*256);
 264         if (!ei_status.mem) {
 265                 printk("ioremap failed - giving up\n");
 266                 retval = -ENXIO;
 267                 goto out1;
 268         }
 269
 270         dev->mem_end = dev->mem_start + (ES_STOP_PG - ES_START_PG)*256;
 271
 272         printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1);
 273
 274 #if ES_DEBUG & ES_D_PROBE
 275         if (inb(ioaddr + ES_CFG5))
 276                 printk("es3210: Warning - DMA channel enabled, but not used here.\n");
 277 #endif
 278         /* Note, point at the 8390, and not the card... */
 279         dev->base_addr = ioaddr + ES_NIC_OFFSET;
 280
 281         ei_status.name = "ES3210";
 282         ei_status.tx_start_page = ES_START_PG;
 283         ei_status.rx_start_page = ES_START_PG + TX_PAGES;
 284         ei_status.stop_page = ES_STOP_PG;
 285         ei_status.word16 = 1;
 286
 287         if (ei_debug > 0)
 288                 printk(version);
 289
 290         ei_status.reset_8390 = &es_reset_8390;
 291         ei_status.block_input = &es_block_input;
 292         ei_status.block_output = &es_block_output;
 293         ei_status.get_8390_hdr = &es_get_8390_hdr;
 294
 295         dev->open = &es_open;
 296         dev->stop = &es_close;
 297 #ifdef CONFIG_NET_POLL_CONTROLLER
 298         dev->poll_controller = ei_poll;
 299 #endif
 300         NS8390_init(dev, 0);
 301
 302         retval = register_netdev(dev);
 303         if (retval)
 304                 goto out1;
 305         return 0;
 306 out1:
 307         free_irq(dev->irq, dev);
 308 out:
 309         release_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT);
 310         return retval;
 311 }
 312
 313 /*
 314  *      Reset as per the packet driver method. Judging by the EISA cfg
 315  *      file, this just toggles the "Board Enable" bits (bit 2 and 0).
 316  */
 317
 318 static void es_reset_8390(struct net_device *dev)
 319 {
 320         unsigned short ioaddr = dev->base_addr;
 321         unsigned long end;
 322
 323         outb(0x04, ioaddr + ES_RESET_PORT);
 324         if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
 325
 326         end = jiffies + 2*HZ/100;
 327         while ((signed)(end - jiffies) > 0) continue;
 328
 329         ei_status.txing = 0;
 330         outb(0x01, ioaddr + ES_RESET_PORT);
 331         if (ei_debug > 1) printk("reset done\n");
 332
 333         return;
 334 }
 335
 336 /*
 337  *      Note: In the following three functions is the implicit assumption
 338  *      that the associated memcpy will only use "rep; movsl" as long as
 339  *      we keep the counts as some multiple of doublewords. This is a
 340  *      requirement of the hardware, and also prevents us from using
 341  *      eth_io_copy_and_sum() since we can't guarantee it will limit
 342  *      itself to doubleword access.
 343  */
 344
 345 /*
 346  *      Grab the 8390 specific header. Similar to the block_input routine, but
 347  *      we don't need to be concerned with ring wrap as the header will be at
 348  *      the start of a page, so we optimize accordingly. (A single doubleword.)
 349  */
 350
 351 static void
 352 es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 353 {
 354         void __iomem *hdr_start = ei_status.mem + ((ring_page - ES_START_PG)<<8);
 355         memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
 356         hdr->count = (hdr->count + 3) & ~3;     /* Round up allocation. */
 357 }
 358
 359 /*
 360  *      Block input and output are easy on shared memory ethercards, the only
 361  *      complication is when the ring buffer wraps. The count will already
 362  *      be rounded up to a doubleword value via es_get_8390_hdr() above.
 363  */
 364
 365 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb,
 366                                                   int ring_offset)
 367 {
 368         void __iomem *xfer_start = ei_status.mem + ring_offset - ES_START_PG*256;
 369
 370         if (ring_offset + count > ES_STOP_PG*256) {
 371                 /* Packet wraps over end of ring buffer. */
 372                 int semi_count = ES_STOP_PG*256 - ring_offset;
 373                 memcpy_fromio(skb->data, xfer_start, semi_count);
 374                 count -= semi_count;
 375                 memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
 376         } else {
 377                 /* Packet is in one chunk. */
 378                 eth_io_copy_and_sum(skb, xfer_start, count, 0);
 379         }
 380 }
 381
 382 static void es_block_output(struct net_device *dev, int count,
 383                                 const unsigned char *buf, int start_page)
 384 {
 385         void __iomem *shmem = ei_status.mem + ((start_page - ES_START_PG)<<8);
 386
 387         count = (count + 3) & ~3;     /* Round up to doubleword */
 388         memcpy_toio(shmem, buf, count);
 389 }
 390
 391 static int es_open(struct net_device *dev)
 392 {
 393         ei_open(dev);
 394         return 0;
 395 }
 396
 397 static int es_close(struct net_device *dev)
 398 {
 399
 400         if (ei_debug > 1)
 401                 printk("%s: Shutting down ethercard.\n", dev->name);
 402
 403         ei_close(dev);
 404         return 0;
 405 }
 406
 407 #ifdef MODULE
 408 #define MAX_ES_CARDS    4       /* Max number of ES3210 cards per module */
 409 #define NAMELEN         8       /* # of chars for storing dev->name */
 410 static struct net_device *dev_es3210[MAX_ES_CARDS];
 411 static int io[MAX_ES_CARDS];
 412 static int irq[MAX_ES_CARDS];
 413 static int mem[MAX_ES_CARDS];
 414
 415 module_param_array(io, int, NULL, 0);
 416 module_param_array(irq, int, NULL, 0);
 417 module_param_array(mem, int, NULL, 0);
 418 MODULE_PARM_DESC(io, "I/O base address(es)");
 419 MODULE_PARM_DESC(irq, "IRQ number(s)");
 420 MODULE_PARM_DESC(mem, "memory base address(es)");
 421 MODULE_DESCRIPTION("Racal-Interlan ES3210 EISA ethernet driver");
 422 MODULE_LICENSE("GPL");
 423
 424 int
 425 init_module(void)
 426 {
 427         struct net_device *dev;
 428         int this_dev, found = 0;
 429
 430         for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
 431                 if (io[this_dev] == 0 && this_dev != 0)
 432                         break;
 433                 dev = alloc_ei_netdev();
 434                 if (!dev)
 435                         break;
 436                 dev->irq = irq[this_dev];
 437                 dev->base_addr = io[this_dev];
 438                 dev->mem_start = mem[this_dev];
 439                 if (do_es_probe(dev) == 0) {
 440                         dev_es3210[found++] = dev;
 441                         continue;
 442                 }
 443                 free_netdev(dev);
 444                 printk(KERN_WARNING "es3210.c: No es3210 card found (i/o = 0x%x).\n", io[this_dev]);
 445                 break;
 446         }
 447         if (found)
 448                 return 0;
 449         return -ENXIO;
 450 }
 451
 452 static void cleanup_card(struct net_device *dev)
 453 {
 454         free_irq(dev->irq, dev);
 455         release_region(dev->base_addr, ES_IO_EXTENT);
 456         iounmap(ei_status.mem);
 457 }
 458
 459 void
 460 cleanup_module(void)
 461 {
 462         int this_dev;
 463
 464         for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
 465                 struct net_device *dev = dev_es3210[this_dev];
 466                 if (dev) {
 467                         unregister_netdev(dev);
 468                         cleanup_card(dev);
 469                         free_netdev(dev);
 470                 }
 471         }
 472 }
 473 #endif /* MODULE */
 474