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
  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 #include <linux/platform_device.h>
  40
  41 #include <asm/system.h>
  42 #include <asm/io.h>
  43 #include <asm/irq.h>
  44 #include <asm/pci.h>
  45 #include <asm/dma.h>
  46
  47 #include "tms380tr.h"
  48
  49 #define SK_ISA_IO_EXTENT 32
  50
  51 /* A zero-terminated list of I/O addresses to be probed. */
  52 static unsigned int portlist[] __initdata = {
  53         0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
  54         0
  55 };
  56
  57 /* A zero-terminated list of IRQs to be probed.
  58  * Used again after initial probe for sktr_chipset_init, called from sktr_open.
  59  */
  60 static const unsigned short irqlist[] = {
  61         3, 5, 9, 10, 11, 12, 15,
  62         0
  63 };
  64
  65 /* A zero-terminated list of DMAs to be probed. */
  66 static int dmalist[] __initdata = {
  67         5, 6, 7,
  68         0
  69 };
  70
  71 static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
  72 static u64 dma_mask = ISA_MAX_ADDRESS;
  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, struct device *pdev)
 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         if (dev->base_addr)     /* probe specific location */
 147                 err = sk_isa_probe1(dev, dev->base_addr);
 148         else {
 149                 for (port = portlist; *port; port++) {
 150                         err = sk_isa_probe1(dev, *port);
 151                         if (!err)
 152                                 break;
 153                 }
 154         }
 155         if (err)
 156                 goto out5;
 157
 158         /* At this point we have found a valid card. */
 159
 160         if (versionprinted++ == 0)
 161                 printk(KERN_DEBUG "%s", version);
 162
 163         err = -EIO;
 164         pdev->dma_mask = &dma_mask;
 165         if (tmsdev_init(dev, pdev))
 166                 goto out4;
 167
 168         dev->base_addr &= ~3;
 169
 170         sk_isa_read_eeprom(dev);
 171
 172         printk(KERN_DEBUG "skisa.c:    Ring Station Address: %pM\n",
 173                dev->dev_addr);
 174
 175         tp = netdev_priv(dev);
 176         tp->setnselout = sk_isa_setnselout_pins;
 177
 178         tp->sifreadb = sk_isa_sifreadb;
 179         tp->sifreadw = sk_isa_sifreadw;
 180         tp->sifwriteb = sk_isa_sifwriteb;
 181         tp->sifwritew = sk_isa_sifwritew;
 182
 183         memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
 184
 185         tp->tmspriv = NULL;
 186
 187         dev->open = sk_isa_open;
 188         dev->stop = tms380tr_close;
 189
 190         if (dev->irq == 0)
 191         {
 192                 for(j = 0; irqlist[j] != 0; j++)
 193                 {
 194                         dev->irq = irqlist[j];
 195                         if (!request_irq(dev->irq, tms380tr_interrupt, 0,
 196                                 isa_cardname, dev))
 197                                 break;
 198                 }
 199
 200                 if(irqlist[j] == 0)
 201                 {
 202                         printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
 203                         goto out3;
 204                 }
 205         }
 206         else
 207         {
 208                 for(j = 0; irqlist[j] != 0; j++)
 209                         if (irqlist[j] == dev->irq)
 210                                 break;
 211                 if (irqlist[j] == 0)
 212                 {
 213                         printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
 214                                 dev->irq);
 215                         goto out3;
 216                 }
 217                 if (request_irq(dev->irq, tms380tr_interrupt, 0,
 218                         isa_cardname, dev))
 219                 {
 220                         printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
 221                                 dev->irq);
 222                         goto out3;
 223                 }
 224         }
 225
 226         if (dev->dma == 0)
 227         {
 228                 for(j = 0; dmalist[j] != 0; j++)
 229                 {
 230                         dev->dma = dmalist[j];
 231                         if (!request_dma(dev->dma, isa_cardname))
 232                                 break;
 233                 }
 234
 235                 if(dmalist[j] == 0)
 236                 {
 237                         printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
 238                         goto out2;
 239                 }
 240         }
 241         else
 242         {
 243                 for(j = 0; dmalist[j] != 0; j++)
 244                         if (dmalist[j] == dev->dma)
 245                                 break;
 246                 if (dmalist[j] == 0)
 247                 {
 248                         printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
 249                                 dev->dma);
 250                         goto out2;
 251                 }
 252                 if (request_dma(dev->dma, isa_cardname))
 253                 {
 254                         printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
 255                                 dev->dma);
 256                         goto out2;
 257                 }
 258         }
 259
 260         err = register_netdev(dev);
 261         if (err)
 262                 goto out;
 263
 264         printk(KERN_DEBUG "%s:    IO: %#4lx  IRQ: %d  DMA: %d\n",
 265                dev->name, dev->base_addr, dev->irq, dev->dma);
 266
 267         return 0;
 268 out:
 269         free_dma(dev->dma);
 270 out2:
 271         free_irq(dev->irq, dev);
 272 out3:
 273         tmsdev_term(dev);
 274 out4:
 275         release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 276 out5:
 277         return err;
 278 }
 279
 280 /*
 281  * Reads MAC address from adapter RAM, which should've read it from
 282  * the onboard ROM.
 283  *
 284  * Calling this on a board that does not support it can be a very
 285  * dangerous thing.  The Madge board, for instance, will lock your
 286  * machine hard when this is called.  Luckily, its supported in a
 287  * separate driver.  --ASF
 288  */
 289 static void sk_isa_read_eeprom(struct net_device *dev)
 290 {
 291         int i;
 292
 293         /* Address: 0000:0000 */
 294         sk_isa_sifwritew(dev, 0, SIFADX);
 295         sk_isa_sifwritew(dev, 0, SIFADR);
 296
 297         /* Read six byte MAC address data */
 298         dev->addr_len = 6;
 299         for(i = 0; i < 6; i++)
 300                 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
 301 }
 302
 303 static unsigned short sk_isa_setnselout_pins(struct net_device *dev)
 304 {
 305         return 0;
 306 }
 307
 308 static int sk_isa_open(struct net_device *dev)
 309 {
 310         struct net_local *tp = netdev_priv(dev);
 311         unsigned short val = 0;
 312         unsigned short oldval;
 313         int i;
 314
 315         val = 0;
 316         for(i = 0; irqlist[i] != 0; i++)
 317         {
 318                 if(irqlist[i] == dev->irq)
 319                         break;
 320         }
 321
 322         val |= CYCLE_TIME << 2;
 323         val |= i << 4;
 324         i = dev->dma - 5;
 325         val |= i;
 326         if(tp->DataRate == SPEED_4)
 327                 val |= LINE_SPEED_BIT;
 328         else
 329                 val &= ~LINE_SPEED_BIT;
 330         oldval = sk_isa_sifreadb(dev, POSREG);
 331         /* Leave cycle bits alone */
 332         oldval |= 0xf3;
 333         val &= oldval;
 334         sk_isa_sifwriteb(dev, val, POSREG);
 335
 336         return tms380tr_open(dev);
 337 }
 338
 339 #define ISATR_MAX_ADAPTERS 3
 340
 341 static int io[ISATR_MAX_ADAPTERS];
 342 static int irq[ISATR_MAX_ADAPTERS];
 343 static int dma[ISATR_MAX_ADAPTERS];
 344
 345 MODULE_LICENSE("GPL");
 346
 347 module_param_array(io, int, NULL, 0);
 348 module_param_array(irq, int, NULL, 0);
 349 module_param_array(dma, int, NULL, 0);
 350
 351 static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
 352
 353 static struct platform_driver sk_isa_driver = {
 354         .driver         = {
 355                 .name   = "skisa",
 356         },
 357 };
 358
 359 static int __init sk_isa_init(void)
 360 {
 361         struct net_device *dev;
 362         struct platform_device *pdev;
 363         int i, num = 0, err = 0;
 364
 365         err = platform_driver_register(&sk_isa_driver);
 366         if (err)
 367                 return err;
 368
 369         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 370                 dev = alloc_trdev(sizeof(struct net_local));
 371                 if (!dev)
 372                         continue;
 373
 374                 dev->base_addr = io[i];
 375                 dev->irq = irq[i];
 376                 dev->dma = dma[i];
 377                 pdev = platform_device_register_simple("skisa",
 378                         i, NULL, 0);
 379                 if (IS_ERR(pdev)) {
 380                         free_netdev(dev);
 381                         continue;
 382                 }
 383                 err = setup_card(dev, &pdev->dev);
 384                 if (!err) {
 385                         sk_isa_dev[i] = pdev;
 386                         platform_set_drvdata(sk_isa_dev[i], dev);
 387                         ++num;
 388                 } else {
 389                         platform_device_unregister(pdev);
 390                         free_netdev(dev);
 391                 }
 392         }
 393
 394         printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
 395         /* Probe for cards. */
 396         if (num == 0) {
 397                 printk(KERN_NOTICE "skisa.c: No cards found.\n");
 398                 platform_driver_unregister(&sk_isa_driver);
 399                 return -ENODEV;
 400         }
 401         return 0;
 402 }
 403
 404 static void __exit sk_isa_cleanup(void)
 405 {
 406         struct net_device *dev;
 407         int i;
 408
 409         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 410                 struct platform_device *pdev = sk_isa_dev[i];
 411
 412                 if (!pdev)
 413                         continue;
 414                 dev = platform_get_drvdata(pdev);
 415                 unregister_netdev(dev);
 416                 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 417                 free_irq(dev->irq, dev);
 418                 free_dma(dev->dma);
 419                 tmsdev_term(dev);
 420                 free_netdev(dev);
 421                 platform_set_drvdata(pdev, NULL);
 422                 platform_device_unregister(pdev);
 423         }
 424         platform_driver_unregister(&sk_isa_driver);
 425 }
 426
 427 module_init(sk_isa_init);
 428 module_exit(sk_isa_cleanup);