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 static u64 dma_mask = ISA_MAX_ADDRESS;
  72 static int sk_isa_open(struct net_device *dev);
  73 static void sk_isa_read_eeprom(struct net_device *dev);
  74 static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
  75
  76 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
  77 {
  78         return inb(dev->base_addr + reg);
  79 }
  80
  81 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
  82 {
  83         return inw(dev->base_addr + reg);
  84 }
  85
  86 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
  87 {
  88         outb(val, dev->base_addr + reg);
  89 }
  90
  91 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
  92 {
  93         outw(val, dev->base_addr + reg);
  94 }
  95
  96
  97 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
  98 {
  99         unsigned char old, chk1, chk2;
 100
 101         if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
 102                 return -ENODEV;
 103
 104         old = inb(ioaddr + SIFADR);     /* Get the old SIFADR value */
 105
 106         chk1 = 0;       /* Begin with check value 0 */
 107         do {
 108                 /* Write new SIFADR value */
 109                 outb(chk1, ioaddr + SIFADR);
 110
 111                 /* Read, invert and write */
 112                 chk2 = inb(ioaddr + SIFADD);
 113                 chk2 ^= 0x0FE;
 114                 outb(chk2, ioaddr + SIFADR);
 115
 116                 /* Read, invert and compare */
 117                 chk2 = inb(ioaddr + SIFADD);
 118                 chk2 ^= 0x0FE;
 119
 120                 if(chk1 != chk2) {
 121                         release_region(ioaddr, SK_ISA_IO_EXTENT);
 122                         return -ENODEV;
 123                 }
 124
 125                 chk1 -= 2;
 126         } while(chk1 != 0);     /* Repeat 128 times (all byte values) */
 127
 128         /* Restore the SIFADR value */
 129         outb(old, ioaddr + SIFADR);
 130
 131         dev->base_addr = ioaddr;
 132         return 0;
 133 }
 134
 135 static int __init setup_card(struct net_device *dev, struct device *pdev)
 136 {
 137         struct net_local *tp;
 138         static int versionprinted;
 139         const unsigned *port;
 140         int j, err = 0;
 141
 142         if (!dev)
 143                 return -ENOMEM;
 144
 145         SET_MODULE_OWNER(dev);
 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: ");
 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 "skisa.c: AutoSelect no IRQ available\n");
 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 "skisa.c: Illegal IRQ %d specified\n",
 217                                 dev->irq);
 218                         goto out3;
 219                 }
 220                 if (request_irq(dev->irq, tms380tr_interrupt, 0,
 221                         isa_cardname, dev))
 222                 {
 223                         printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
 224                                 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 "skisa.c: AutoSelect no DMA available\n");
 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 "skisa.c: Illegal DMA %d specified\n",
 252                                 dev->dma);
 253                         goto out2;
 254                 }
 255                 if (request_dma(dev->dma, isa_cardname))
 256                 {
 257                         printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
 258                                 dev->dma);
 259                         goto out2;
 260                 }
 261         }
 262
 263         err = register_netdev(dev);
 264         if (err)
 265                 goto out;
 266
 267         printk(KERN_DEBUG "%s:    IO: %#4lx  IRQ: %d  DMA: %d\n",
 268                dev->name, dev->base_addr, dev->irq, dev->dma);
 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 out5:
 280         return err;
 281 }
 282
 283 /*
 284  * Reads MAC address from adapter RAM, which should've read it from
 285  * the onboard ROM.
 286  *
 287  * Calling this on a board that does not support it can be a very
 288  * dangerous thing.  The Madge board, for instance, will lock your
 289  * machine hard when this is called.  Luckily, its supported in a
 290  * separate driver.  --ASF
 291  */
 292 static void sk_isa_read_eeprom(struct net_device *dev)
 293 {
 294         int i;
 295
 296         /* Address: 0000:0000 */
 297         sk_isa_sifwritew(dev, 0, SIFADX);
 298         sk_isa_sifwritew(dev, 0, SIFADR);
 299
 300         /* Read six byte MAC address data */
 301         dev->addr_len = 6;
 302         for(i = 0; i < 6; i++)
 303                 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
 304 }
 305
 306 unsigned short sk_isa_setnselout_pins(struct net_device *dev)
 307 {
 308         return 0;
 309 }
 310
 311 static int sk_isa_open(struct net_device *dev)
 312 {
 313         struct net_local *tp = netdev_priv(dev);
 314         unsigned short val = 0;
 315         unsigned short oldval;
 316         int i;
 317
 318         val = 0;
 319         for(i = 0; irqlist[i] != 0; i++)
 320         {
 321                 if(irqlist[i] == dev->irq)
 322                         break;
 323         }
 324
 325         val |= CYCLE_TIME << 2;
 326         val |= i << 4;
 327         i = dev->dma - 5;
 328         val |= i;
 329         if(tp->DataRate == SPEED_4)
 330                 val |= LINE_SPEED_BIT;
 331         else
 332                 val &= ~LINE_SPEED_BIT;
 333         oldval = sk_isa_sifreadb(dev, POSREG);
 334         /* Leave cycle bits alone */
 335         oldval |= 0xf3;
 336         val &= oldval;
 337         sk_isa_sifwriteb(dev, val, POSREG);
 338
 339         return tms380tr_open(dev);
 340 }
 341
 342 #define ISATR_MAX_ADAPTERS 3
 343
 344 static int io[ISATR_MAX_ADAPTERS];
 345 static int irq[ISATR_MAX_ADAPTERS];
 346 static int dma[ISATR_MAX_ADAPTERS];
 347
 348 MODULE_LICENSE("GPL");
 349
 350 module_param_array(io, int, NULL, 0);
 351 module_param_array(irq, int, NULL, 0);
 352 module_param_array(dma, int, NULL, 0);
 353
 354 static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
 355
 356 static struct device_driver sk_isa_driver = {
 357         .name           = "skisa",
 358         .bus            = &platform_bus_type,
 359 };
 360
 361 static int __init sk_isa_init(void)
 362 {
 363         struct net_device *dev;
 364         struct platform_device *pdev;
 365         int i, num = 0, err = 0;
 366
 367         err = driver_register(&sk_isa_driver);
 368         if (err)
 369                 return err;
 370
 371         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 372                 dev = alloc_trdev(sizeof(struct net_local));
 373                 if (!dev)
 374                         continue;
 375
 376                 dev->base_addr = io[i];
 377                 dev->irq = irq[i];
 378                 dev->dma = dma[i];
 379                 pdev = platform_device_register_simple("skisa",
 380                         i, NULL, 0);
 381                 err = setup_card(dev, &pdev->dev);
 382                 if (!err) {
 383                         sk_isa_dev[i] = pdev;
 384                         dev_set_drvdata(&sk_isa_dev[i]->dev, dev);
 385                         ++num;
 386                 } else {
 387                         platform_device_unregister(pdev);
 388                         free_netdev(dev);
 389                 }
 390         }
 391
 392         printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
 393         /* Probe for cards. */
 394         if (num == 0) {
 395                 printk(KERN_NOTICE "skisa.c: No cards found.\n");
 396                 return (-ENODEV);
 397         }
 398         return (0);
 399 }
 400
 401 static void __exit sk_isa_cleanup(void)
 402 {
 403         struct net_device *dev;
 404         int i;
 405
 406         for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 407                 struct platform_device *pdev = sk_isa_dev[i];
 408
 409                 if (!pdev)
 410                         continue;
 411                 dev = dev_get_drvdata(&pdev->dev);
 412                 unregister_netdev(dev);
 413                 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 414                 free_irq(dev->irq, dev);
 415                 free_dma(dev->dma);
 416                 tmsdev_term(dev);
 417                 free_netdev(dev);
 418                 dev_set_drvdata(&pdev->dev, NULL);
 419                 platform_device_unregister(pdev);
 420         }
 421         driver_unregister(&sk_isa_driver);
 422 }
 423
 424 module_init(sk_isa_init);
 425 module_exit(sk_isa_cleanup);