drivers/net/pcmcia/ibmtr_cs.c

   1 /*======================================================================
   2
   3     A PCMCIA token-ring driver for IBM-based cards
   4
   5     This driver supports the IBM PCMCIA Token-Ring Card.
   6     Written by Steve Kipisz, kipisz@vnet.ibm.com or
   7                              bungy@ibm.net
   8
   9     Written 1995,1996.
  10
  11     This code is based on pcnet_cs.c from David Hinds.
  12
  13     V2.2.0 February 1999 - Mike Phillips phillim@amtrak.com
  14
  15     Linux V2.2.x presented significant changes to the underlying
  16     ibmtr.c code.  Mainly the code became a lot more organized and
  17     modular.
  18
  19     This caused the old PCMCIA Token Ring driver to give up and go
  20     home early. Instead of just patching the old code to make it
  21     work, the PCMCIA code has been streamlined, updated and possibly
  22     improved.
  23
  24     This code now only contains code required for the Card Services.
  25     All we do here is set the card up enough so that the real ibmtr.c
  26     driver can find it and work with it properly.
  27
  28     i.e. We set up the io port, irq, mmio memory and shared ram
  29     memory.  This enables ibmtr_probe in ibmtr.c to find the card and
  30     configure it as though it was a normal ISA and/or PnP card.
  31
  32     CHANGES
  33
  34     v2.2.5 April 1999 Mike Phillips (phillim@amtrak.com)
  35     Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
  36
  37     v2.2.7 May 1999 Mike Phillips (phillim@amtrak.com)
  38     Updated to version 2.2.7 to match the first version of the kernel
  39     that the modification to ibmtr.c were incorporated into.
  40
  41     v2.2.17 July 2000 Burt Silverman (burts@us.ibm.com)
  42     Address translation feature of PCMCIA controller is usable so
  43     memory windows can be placed in High memory (meaning above
  44     0xFFFFF.)
  45
  46 ======================================================================*/
  47
  48 #include <linux/kernel.h>
  49 #include <linux/init.h>
  50 #include <linux/ptrace.h>
  51 #include <linux/slab.h>
  52 #include <linux/string.h>
  53 #include <linux/timer.h>
  54 #include <linux/module.h>
  55 #include <linux/ethtool.h>
  56 #include <linux/netdevice.h>
  57 #include <linux/trdevice.h>
  58 #include <linux/ibmtr.h>
  59
  60 #include <pcmcia/cs_types.h>
  61 #include <pcmcia/cs.h>
  62 #include <pcmcia/cistpl.h>
  63 #include <pcmcia/ds.h>
  64
  65 #include <asm/uaccess.h>
  66 #include <asm/io.h>
  67 #include <asm/system.h>
  68
  69 #define PCMCIA
  70 #include "../tokenring/ibmtr.c"
  71
  72 #ifdef PCMCIA_DEBUG
  73 static int pc_debug = PCMCIA_DEBUG;
  74 module_param(pc_debug, int, 0);
  75 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  76 static char *version =
  77 "ibmtr_cs.c 1.10   1996/01/06 05:19:00 (Steve Kipisz)\n"
  78 "           2.2.7  1999/05/03 12:00:00 (Mike Phillips)\n"
  79 "           2.4.2  2001/30/28 Midnight (Burt Silverman)\n";
  80 #else
  81 #define DEBUG(n, args...)
  82 #endif
  83
  84 /*====================================================================*/
  85
  86 /* Parameters that can be set with 'insmod' */
  87
  88 /* MMIO base address */
  89 static u_long mmiobase = 0xce000;
  90
  91 /* SRAM base address */
  92 static u_long srambase = 0xd0000;
  93
  94 /* SRAM size 8,16,32,64 */
  95 static u_long sramsize = 64;
  96
  97 /* Ringspeed 4,16 */
  98 static int ringspeed = 16;
  99
 100 module_param(mmiobase, ulong, 0);
 101 module_param(srambase, ulong, 0);
 102 module_param(sramsize, ulong, 0);
 103 module_param(ringspeed, int, 0);
 104 MODULE_LICENSE("GPL");
 105
 106 /*====================================================================*/
 107
 108 static int ibmtr_config(struct pcmcia_device *link);
 109 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
 110 static void ibmtr_release(struct pcmcia_device *link);
 111 static void ibmtr_detach(struct pcmcia_device *p_dev);
 112
 113 /*====================================================================*/
 114
 115 typedef struct ibmtr_dev_t {
 116         struct pcmcia_device    *p_dev;
 117     struct net_device   *dev;
 118     dev_node_t          node;
 119     window_handle_t     sram_win_handle;
 120     struct tok_info     *ti;
 121 } ibmtr_dev_t;
 122
 123 static void netdev_get_drvinfo(struct net_device *dev,
 124                                struct ethtool_drvinfo *info)
 125 {
 126         strcpy(info->driver, "ibmtr_cs");
 127 }
 128
 129 static const struct ethtool_ops netdev_ethtool_ops = {
 130         .get_drvinfo            = netdev_get_drvinfo,
 131 };
 132
 133 /*======================================================================
 134
 135     ibmtr_attach() creates an "instance" of the driver, allocating
 136     local data structures for one device.  The device is registered
 137     with Card Services.
 138
 139 ======================================================================*/
 140
 141 static int __devinit ibmtr_attach(struct pcmcia_device *link)
 142 {
 143     ibmtr_dev_t *info;
 144     struct net_device *dev;
 145
 146     DEBUG(0, "ibmtr_attach()\n");
 147
 148     /* Create new token-ring device */
 149     info = kzalloc(sizeof(*info), GFP_KERNEL);
 150     if (!info) return -ENOMEM;
 151     dev = alloc_trdev(sizeof(struct tok_info));
 152     if (!dev) {
 153         kfree(info);
 154         return -ENOMEM;
 155     }
 156
 157     info->p_dev = link;
 158     link->priv = info;
 159     info->ti = netdev_priv(dev);
 160
 161     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 162     link->io.NumPorts1 = 4;
 163     link->io.IOAddrLines = 16;
 164     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 165     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 166     link->irq.Handler = &tok_interrupt;
 167     link->conf.Attributes = CONF_ENABLE_IRQ;
 168     link->conf.IntType = INT_MEMORY_AND_IO;
 169     link->conf.Present = PRESENT_OPTION;
 170
 171     link->irq.Instance = info->dev = dev;
 172
 173     SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
 174
 175     return ibmtr_config(link);
 176 } /* ibmtr_attach */
 177
 178 /*======================================================================
 179
 180     This deletes a driver "instance".  The device is de-registered
 181     with Card Services.  If it has been released, all local data
 182     structures are freed.  Otherwise, the structures will be freed
 183     when the device is released.
 184
 185 ======================================================================*/
 186
 187 static void ibmtr_detach(struct pcmcia_device *link)
 188 {
 189     struct ibmtr_dev_t *info = link->priv;
 190     struct net_device *dev = info->dev;
 191      struct tok_info *ti = netdev_priv(dev);
 192
 193     DEBUG(0, "ibmtr_detach(0x%p)\n", link);
 194
 195     /*
 196      * When the card removal interrupt hits tok_interrupt(),
 197      * bail out early, so we don't crash the machine
 198      */
 199     ti->sram_phys |= 1;
 200
 201     if (link->dev_node)
 202         unregister_netdev(dev);
 203
 204     del_timer_sync(&(ti->tr_timer));
 205
 206     ibmtr_release(link);
 207
 208     free_netdev(dev);
 209     kfree(info);
 210 } /* ibmtr_detach */
 211
 212 /*======================================================================
 213
 214     ibmtr_config() is scheduled to run after a CARD_INSERTION event
 215     is received, to configure the PCMCIA socket, and to make the
 216     token-ring device available to the system.
 217
 218 ======================================================================*/
 219
 220 #define CS_CHECK(fn, ret) \
 221 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 222
 223 static int __devinit ibmtr_config(struct pcmcia_device *link)
 224 {
 225     ibmtr_dev_t *info = link->priv;
 226     struct net_device *dev = info->dev;
 227     struct tok_info *ti = netdev_priv(dev);
 228     win_req_t req;
 229     memreq_t mem;
 230     int i, last_ret, last_fn;
 231
 232     DEBUG(0, "ibmtr_config(0x%p)\n", link);
 233
 234     link->conf.ConfigIndex = 0x61;
 235
 236     /* Determine if this is PRIMARY or ALTERNATE. */
 237
 238     /* Try PRIMARY card at 0xA20-0xA23 */
 239     link->io.BasePort1 = 0xA20;
 240     i = pcmcia_request_io(link, &link->io);
 241     if (i != 0) {
 242         /* Couldn't get 0xA20-0xA23.  Try ALTERNATE at 0xA24-0xA27. */
 243         link->io.BasePort1 = 0xA24;
 244         CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
 245     }
 246     dev->base_addr = link->io.BasePort1;
 247
 248     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 249     dev->irq = link->irq.AssignedIRQ;
 250     ti->irq = link->irq.AssignedIRQ;
 251     ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
 252
 253     /* Allocate the MMIO memory window */
 254     req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
 255     req.Attributes |= WIN_USE_WAIT;
 256     req.Base = 0;
 257     req.Size = 0x2000;
 258     req.AccessSpeed = 250;
 259     CS_CHECK(RequestWindow, pcmcia_request_window(&link, &req, &link->win));
 260
 261     mem.CardOffset = mmiobase;
 262     mem.Page = 0;
 263     CS_CHECK(MapMemPage, pcmcia_map_mem_page(link->win, &mem));
 264     ti->mmio = ioremap(req.Base, req.Size);
 265
 266     /* Allocate the SRAM memory window */
 267     req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
 268     req.Attributes |= WIN_USE_WAIT;
 269     req.Base = 0;
 270     req.Size = sramsize * 1024;
 271     req.AccessSpeed = 250;
 272     CS_CHECK(RequestWindow, pcmcia_request_window(&link, &req, &info->sram_win_handle));
 273
 274     mem.CardOffset = srambase;
 275     mem.Page = 0;
 276     CS_CHECK(MapMemPage, pcmcia_map_mem_page(info->sram_win_handle, &mem));
 277
 278     ti->sram_base = mem.CardOffset >> 12;
 279     ti->sram_virt = ioremap(req.Base, req.Size);
 280     ti->sram_phys = req.Base;
 281
 282     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 283
 284     /*  Set up the Token-Ring Controller Configuration Register and
 285         turn on the card.  Check the "Local Area Network Credit Card
 286         Adapters Technical Reference"  SC30-3585 for this info.  */
 287     ibmtr_hw_setup(dev, mmiobase);
 288
 289     link->dev_node = &info->node;
 290     SET_NETDEV_DEV(dev, &handle_to_dev(link));
 291
 292     i = ibmtr_probe_card(dev);
 293     if (i != 0) {
 294         printk(KERN_NOTICE "ibmtr_cs: register_netdev() failed\n");
 295         link->dev_node = NULL;
 296         goto failed;
 297     }
 298
 299     strcpy(info->node.dev_name, dev->name);
 300
 301     printk(KERN_INFO "%s: port %#3lx, irq %d,",
 302            dev->name, dev->base_addr, dev->irq);
 303     printk (" mmio %#5lx,", (u_long)ti->mmio);
 304     printk (" sram %#5lx,", (u_long)ti->sram_base << 12);
 305     printk ("\n" KERN_INFO "  hwaddr=");
 306     for (i = 0; i < TR_ALEN; i++)
 307         printk("%02X", dev->dev_addr[i]);
 308     printk("\n");
 309     return 0;
 310
 311 cs_failed:
 312     cs_error(link, last_fn, last_ret);
 313 failed:
 314     ibmtr_release(link);
 315     return -ENODEV;
 316 } /* ibmtr_config */
 317
 318 /*======================================================================
 319
 320     After a card is removed, ibmtr_release() will unregister the net
 321     device, and release the PCMCIA configuration.  If the device is
 322     still open, this will be postponed until it is closed.
 323
 324 ======================================================================*/
 325
 326 static void ibmtr_release(struct pcmcia_device *link)
 327 {
 328         ibmtr_dev_t *info = link->priv;
 329         struct net_device *dev = info->dev;
 330
 331         DEBUG(0, "ibmtr_release(0x%p)\n", link);
 332
 333         if (link->win) {
 334                 struct tok_info *ti = netdev_priv(dev);
 335                 iounmap(ti->mmio);
 336                 pcmcia_release_window(info->sram_win_handle);
 337         }
 338         pcmcia_disable_device(link);
 339 }
 340
 341 static int ibmtr_suspend(struct pcmcia_device *link)
 342 {
 343         ibmtr_dev_t *info = link->priv;
 344         struct net_device *dev = info->dev;
 345
 346         if (link->open)
 347                 netif_device_detach(dev);
 348
 349         return 0;
 350 }
 351
 352 static int __devinit ibmtr_resume(struct pcmcia_device *link)
 353 {
 354         ibmtr_dev_t *info = link->priv;
 355         struct net_device *dev = info->dev;
 356
 357         if (link->open) {
 358                 ibmtr_probe(dev);       /* really? */
 359                 netif_device_attach(dev);
 360         }
 361
 362         return 0;
 363 }
 364
 365
 366 /*====================================================================*/
 367
 368 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
 369 {
 370     int i;
 371
 372     /* Bizarre IBM behavior, there are 16 bits of information we
 373        need to set, but the card only allows us to send 4 bits at a
 374        time.  For each byte sent to base_addr, bits 7-4 tell the
 375        card which part of the 16 bits we are setting, bits 3-0 contain
 376        the actual information */
 377
 378     /* First nibble provides 4 bits of mmio */
 379     i = (mmiobase >> 16) & 0x0F;
 380     outb(i, dev->base_addr);
 381
 382     /* Second nibble provides 3 bits of mmio */
 383     i = 0x10 | ((mmiobase >> 12) & 0x0E);
 384     outb(i, dev->base_addr);
 385
 386     /* Third nibble, hard-coded values */
 387     i = 0x26;
 388     outb(i, dev->base_addr);
 389
 390     /* Fourth nibble sets shared ram page size */
 391
 392     /* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
 393     i = (sramsize >> 4) & 0x07;
 394     i = ((i == 4) ? 3 : i) << 2;
 395     i |= 0x30;
 396
 397     if (ringspeed == 16)
 398         i |= 2;
 399     if (dev->base_addr == 0xA24)
 400         i |= 1;
 401     outb(i, dev->base_addr);
 402
 403     /* 0x40 will release the card for use */
 404     outb(0x40, dev->base_addr);
 405
 406     return;
 407 }
 408
 409 static struct pcmcia_device_id ibmtr_ids[] = {
 410         PCMCIA_DEVICE_PROD_ID12("3Com", "TokenLink Velocity PC Card", 0x41240e5b, 0x82c3734e),
 411         PCMCIA_DEVICE_PROD_ID12("IBM", "TOKEN RING", 0xb569a6e5, 0xbf8eed47),
 412         PCMCIA_DEVICE_NULL,
 413 };
 414 MODULE_DEVICE_TABLE(pcmcia, ibmtr_ids);
 415
 416 static struct pcmcia_driver ibmtr_cs_driver = {
 417         .owner          = THIS_MODULE,
 418         .drv            = {
 419                 .name   = "ibmtr_cs",
 420         },
 421         .probe          = ibmtr_attach,
 422         .remove         = ibmtr_detach,
 423         .id_table       = ibmtr_ids,
 424         .suspend        = ibmtr_suspend,
 425         .resume         = ibmtr_resume,
 426 };
 427
 428 static int __init init_ibmtr_cs(void)
 429 {
 430         return pcmcia_register_driver(&ibmtr_cs_driver);
 431 }
 432
 433 static void __exit exit_ibmtr_cs(void)
 434 {
 435         pcmcia_unregister_driver(&ibmtr_cs_driver);
 436 }
 437
 438 module_init(init_ibmtr_cs);
 439 module_exit(exit_ibmtr_cs);