drivers/net/tokenring/skisa.c

   1 /*
   2  *  skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
   3  *
   4  *  Based on tmspci written 1999 by Adam Fritzler
   5  *
   6  *  Written 2000 by Jochen Friedrich
   7  *  Dedicated to my girlfriend Steffi Bopp
   8  *
   9  *  This software may be used and distributed according to the terms
  10  *  of the GNU General Public License, incorporated herein by reference.
  11  *
  12  *  This driver module supports the following cards:
  13  *      - SysKonnect TR4/16(+) ISA      (SK-4190)
  14  *
  15  *  Maintainer(s):
  16  *    AF        Adam Fritzler           mid@auk.cx
  17  *    JF        Jochen Friedrich        jochen@scram.de
  18  *
  19  *  Modification History:
  20  *      14-Jan-01       JF      Created
  21  *      28-Oct-02       JF      Fixed probe of card for static compilation.
  22  *                              Fixed module init to not make hotplug go wild.
  23  *      09-Nov-02       JF      Fixed early bail out on out of memory
  24  *                              situations if multiple cards are found.
  25  *                              Cleaned up some unnecessary console SPAM.
  26  *      09-Dec-02       JF      Fixed module reference counting.
  27  *      02-Jan-03       JF      Renamed to skisa.c
  28  *
  29  */
  30 static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";
  31
  32 #include <linux/module.h>
  33 #include <linux/kernel.h>
  34 #include <linux/errno.h>
  35 #include <linux/pci.h>
  36 #include <linux/init.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/trdevice.h>
  39
  40 #include <asm/system.h>
  41 #include <asm/io.h>
  42 #include <asm/irq.h>
  43 #include <asm/pci.h>
  44 #include <asm/dma.h>
  45
  46 #include "tms380tr.h"
  47
  48 #define SK_ISA_IO_EXTENT 32
  49
  50 /* A zero-terminated list of I/O addresses to be probed. */
  51 static unsigned int portlist[] __initdata = {
  52         0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
  53         0
  54 };
  55
  56 /* A zero-terminated list of IRQs to be probed.
  57  * Used again after initial probe for sktr_chipset_init, called from sktr_open.
  58  */
  59 static const unsigned short irqlist[] = {
  60         3, 5, 9, 10, 11, 12, 15,
  61         0
  62 };
  63
  64 /* A zero-terminated list of DMAs to be probed. */
  65 static int dmalist[] __initdata = {
  66         5, 6, 7,
  67         0
  68 };
  69
  70 static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
  71
  72 struct net_device *sk_isa_probe(int unit);
  73 static int sk_isa_open(struct net_device *dev);
  74 static void sk_isa_read_eeprom(struct net_device *dev);
  75 static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
  76
  77 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
  78 {
  79         return inb(dev->base_addr + reg);
  80 }
  81
  82 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
  83 {
  84         return inw(dev->base_addr + reg);
  85 }
  86
  87 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
  88 {
  89         outb(val, dev->base_addr + reg);
  90 }
  91
  92 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
  93 {
  94         outw(val, dev->base_addr + reg);
  95 }
  96
  97
  98 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
  99 {
 100         unsigned char old, chk1, chk2;
 101
 102         if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
 103                 return -ENODEV;
 104
 105         old = inb(ioaddr + SIFADR);     /* Get the old SIFADR value */
 106
 107         chk1 = 0;       /* Begin with check value 0 */
 108         do {
 109                 /* Write new SIFADR value */
 110                 outb(chk1, ioaddr + SIFADR);
 111
 112                 /* Read, invert and write */
 113                 chk2 = inb(ioaddr + SIFADD);
 114                 chk2 ^= 0x0FE;
 115                 outb(chk2, ioaddr + SIFADR);
 116
 117                 /* Read, invert and compare */
 118                 chk2 = inb(ioaddr + SIFADD);
 119                 chk2 ^= 0x0FE;
 120
 121                 if(chk1 != chk2) {
 122                         release_region(ioaddr, SK_ISA_IO_EXTENT);
 123                         return -ENODEV;
 124                 }
 125
 126                 chk1 -= 2;
 127         } while(chk1 != 0);     /* Repeat 128 times (all byte values) */
 128
 129         /* Restore the SIFADR value */
 130         outb(old, ioaddr + SIFADR);
 131
 132         dev->base_addr = ioaddr;
 133         return 0;
 134 }
 135
 136 static int __init setup_card(struct net_device *dev)
 137 {
 138         struct net_local *tp;
 139         static int versionprinted;
 140         const unsigned *port;
 141         int j, err = 0;
 142
 143         if (!dev)
 144                 return -ENOMEM;
 145
 146         SET_MODULE_OWNER(dev);
 147         if (dev->base_addr)     /* probe specific location */
 148                 err = sk_isa_probe1(dev, dev->base_addr);
 149         else {
 150                 for (port = portlist; *port; port++) {
 151                         err = sk_isa_probe1(dev, *port);
 152                         if (!err)
 153                                 break;
 154                 }
 155         }
 156         if (err)
 157                 goto out4;
 158
 159         /* At this point we have found a valid card. */
 160
 161         if (versionprinted++ == 0)
 162                 printk(KERN_DEBUG "%s", version);
 163
 164         err = -EIO;
 165         if (tmsdev_init(dev, ISA_MAX_ADDRESS, NULL))
 166                 goto out4;
 167
 168         dev->base_addr &= ~3;
 169
 170         sk_isa_read_eeprom(dev);
 171
 172         printk(KERN_DEBUG "%s:    Ring Station Address: ", dev->name);
 173         printk("%2.2x", dev->dev_addr[0]);
 174         for (j = 1; j < 6; j++)
 175                 printk(":%2.2x", dev->dev_addr[j]);
 176         printk("\n");
 177
 178         tp = netdev_priv(dev);
 179         tp->setnselout = sk_isa_setnselout_pins;
 180
 181         tp->sifreadb = sk_isa_sifreadb;
 182         tp->sifreadw = sk_isa_sifreadw;
 183         tp->sifwriteb = sk_isa_sifwriteb;
 184         tp->sifwritew = sk_isa_sifwritew;
 185
 186         memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
 187
 188         tp->tmspriv = NULL;
 189
 190         dev->open = sk_isa_open;
 191         dev->stop = tms380tr_close;
 192
 193         if (dev->irq == 0)
 194         {
 195                 for(j = 0; irqlist[j] != 0; j++)
 196                 {
 197                         dev->irq = irqlist[j];
 198                         if (!request_irq(dev->irq, tms380tr_interrupt, 0,
 199                                 isa_cardname, dev))
 200                                 break;
 201                 }
 202
 203                 if(irqlist[j] == 0)
 204                 {
 205                         printk(KERN_INFO "%s: AutoSelect no IRQ available\n", dev->name);
 206                         goto out3;
 207                 }
 208         }
 209         else
 210         {
 211                 for(j = 0; irqlist[j] != 0; j++)
 212                         if (irqlist[j] == dev->irq)
 213                                 break;
 214                 if (irqlist[j] == 0)
 215                 {
 216                         printk(KERN_INFO "%s: Illegal IRQ %d specified\n",
 217                                 dev->name, dev->irq);
 218                         goto out3;
 219                 }
 220                 if (request_irq(dev->irq, tms380tr_interrupt, 0,
 221                         isa_cardname, dev))
 222                 {
 223                         printk(KERN_INFO "%s: Selected IRQ %d not available\n",
 224                                 dev->name, dev->irq);
 225                         goto out3;
 226                 }
 227         }
 228
 229         if (dev->dma == 0)
 230         {
 231                 for(j = 0; dmalist[j] != 0; j++)
 232                 {
 233                         dev->dma = dmalist[j];
 234                         if (!request_dma(dev->dma, isa_cardname))
 235                                 break;
 236                 }
 237
 238                 if(dmalist[j] == 0)
 239                 {
 240                         printk(KERN_INFO "%s: AutoSelect no DMA available\n", dev->name);
 241                         goto out2;
 242                 }
 243         }
 244         else
 245         {
 246                 for(j = 0; dmalist[j] != 0; j++)
 247                         if (dmalist[j] == dev->dma)
 248                                 break;
 249                 if (dmalist[j] == 0)
 250                 {
 251                         printk(KERN_INFO "%s: Illegal DMA %d specified\n",
 252                                 dev->name, dev->dma);
 253                         goto out2;
 254                 }
 255                 if (request_dma(dev->dma, isa_cardname))
 256                 {
 257                         printk(KERN_INFO "%s: Selected DMA %d not available\n",
 258                                 dev->name, dev->dma);
 259                         goto out2;
 260                 }
 261         }
 262
 263         printk(KERN_DEBUG "%s:    IO: %#4lx  IRQ: %d  DMA: %d\n",
 264                dev->name, dev->base_addr, dev->irq, dev->dma);
 265
 266         err = register_netdev(dev);
 267         if (err)
 268                 goto out;
 269
 270         return 0;
 271 out:
 272         free_dma(dev->dma);
 273 out2:
 274         free_irq(dev->irq, dev);
 275 out3:
 276         tmsdev_term(dev);
 277 out4:
 278         release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 279         return err;
 280 }
 281
 282 struct net_device * __init sk_isa_probe(int unit)
 283 {
 284         struct net_device *dev = alloc_trdev(sizeof(struct net_local));
 285         int err = 0;
 286
 287         if (!dev)
 288                 return ERR_PTR(-ENOMEM);
 289
 290         if (unit >= 0) {
 291                 sprintf(dev->name, "tr%d", unit);
 292                 netdev_boot_setup_check(dev);
 293         }
 294
 295         err = setup_card(dev);
 296         if (err)
 297                 goto out;
 298
 299         return dev;
 300 out:
 301         free_netdev(dev);
 302         return ERR_PTR(err);
 303 }
 304
 305 /*
 306  * Reads MAC address from adapter RAM, which should've read it from
 307  * the onboard ROM.
 308  *
 309  * Calling this on a board that does not support it can be a very
 310  * dangerous thing.  The Madge board, for instance, will lock your
 311  * machine hard when this is called.  Luckily, its supported in a
 312  * separate driver.  --ASF
 313  */
 314 static void sk_isa_read_eeprom(struct net_device *dev)
 315 {
 316         int i;
 317
 318         /* Address: 0000:0000 */
 319         sk_isa_sifwritew(dev, 0, SIFADX);
 320         sk_isa_sifwritew(dev, 0, SIFADR);
 321
 322         /* Read six byte MAC address data */
 323         dev->addr_len = 6;
 324         for(i = 0; i < 6; i++)
 325                 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
 326 }
 327
 328 unsigned short sk_isa_setnselout_pins(struct net_device *dev)
 329 {
 330         return 0;
 331 }
 332
 333 static int sk_isa_open(struct net_device *dev)
 334 {
 335         struct net_local *tp = netdev_priv(dev);
 336         unsigned short val = 0;
 337         unsigned short oldval;
 338         int i;
 339
 340         val = 0;
 341         for(i = 0; irqlist[i] != 0; i++)
 342         {
 343                 if(irqlist[i] == dev->irq)
 344                         break;
 345         }
 346
 347         val |= CYCLE_TIME << 2;
 348         val |= i << 4;
 349         i = dev->dma - 5;
 350         val |= i;
 351         if(tp->DataRate == SPEED_4)
 352                 val |= LINE_SPEED_BIT;
 353         else
 354                 val &= ~LINE_SPEED_BIT;
 355         oldval = sk_isa_sifreadb(dev, POSREG);
 356         /* Leave cycle bits alone */
 357         oldval |= 0xf3;
 358         val &= oldval;
 359         sk_isa_sifwriteb(dev, val, POSREG);
 360
 361         return tms380tr_open(dev);
 362 }
 363
 364 #ifdef MODULE
 365
 366 #define ISATR_MAX_ADAPTERS 3
 367
 368 static int io[ISATR_MAX_ADAPTERS];
 369 static int irq[ISATR_MAX_ADAPTERS];
 370 static int dma[ISATR_MAX_ADAPTERS];
 371
 372 MODULE_LICENSE("GPL");
 373
 374 module_param_array(io, int, NULL, 0);
 375 module_param_array(irq, int, NULL, 0);
 376 module_param_array(dma, int, NULL, 0);
 377
 378 static struct net_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
 379
 380 int init_module(void)
 381 {
 382         struct net_device *dev;
 383         int i, num = 0, err = 0;
 384
 385         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 386                 dev = alloc_trdev(sizeof(struct net_local));
 387                 if (!dev)
 388                         continue;
 389
 390                 dev->base_addr = io[i];
 391                 dev->irq = irq[i];
 392                 dev->dma = dma[i];
 393                 err = setup_card(dev);
 394
 395                 if (!err) {
 396                         sk_isa_dev[i] = dev;
 397                         ++num;
 398                 } else {
 399                         free_netdev(dev);
 400                 }
 401         }
 402
 403         printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
 404         /* Probe for cards. */
 405         if (num == 0) {
 406                 printk(KERN_NOTICE "skisa.c: No cards found.\n");
 407                 return (-ENODEV);
 408         }
 409         return (0);
 410 }
 411
 412 void cleanup_module(void)
 413 {
 414         int i;
 415
 416         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 417                 struct net_device *dev = sk_isa_dev[i];
 418
 419                 if (!dev)
 420                         continue;
 421
 422                 unregister_netdev(dev);
 423                 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 424                 free_irq(dev->irq, dev);
 425                 free_dma(dev->dma);
 426                 tmsdev_term(dev);
 427                 free_netdev(dev);
 428         }
 429 }
 430 #endif /* MODULE */
 431
 432 \f
 433 /*
 434  * Local variables:
 435  *  compile-command: "gcc -DMODVERSIONS  -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c skisa.c"
 436  *  alt-compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c skisa.c"
 437  *  c-set-style "K&R"
 438  *  c-indent-level: 8
 439  *  c-basic-offset: 8
 440  *  tab-width: 8
 441  * End:
 442  */