release/src-rt-6.x.4708/linux/linux-2.6.36/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.h>
  61 #include <pcmcia/cistpl.h>
  62 #include <pcmcia/ds.h>
  63
  64 #include <asm/uaccess.h>
  65 #include <asm/io.h>
  66 #include <asm/system.h>
  67
  68 #define PCMCIA
  69 #include "../tokenring/ibmtr.c"
  70
  71
  72 /*====================================================================*/
  73
  74 /* Parameters that can be set with 'insmod' */
  75
  76 /* MMIO base address */
  77 static u_long mmiobase = 0xce000;
  78
  79 /* SRAM base address */
  80 static u_long srambase = 0xd0000;
  81
  82 /* SRAM size 8,16,32,64 */
  83 static u_long sramsize = 64;
  84
  85 /* Ringspeed 4,16 */
  86 static int ringspeed = 16;
  87
  88 module_param(mmiobase, ulong, 0);
  89 module_param(srambase, ulong, 0);
  90 module_param(sramsize, ulong, 0);
  91 module_param(ringspeed, int, 0);
  92 MODULE_LICENSE("GPL");
  93
  94 /*====================================================================*/
  95
  96 static int ibmtr_config(struct pcmcia_device *link);
  97 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
  98 static void ibmtr_release(struct pcmcia_device *link);
  99 static void ibmtr_detach(struct pcmcia_device *p_dev);
 100
 101 /*====================================================================*/
 102
 103 typedef struct ibmtr_dev_t {
 104         struct pcmcia_device    *p_dev;
 105     struct net_device   *dev;
 106     window_handle_t     sram_win_handle;
 107     struct tok_info     *ti;
 108 } ibmtr_dev_t;
 109
 110 static void netdev_get_drvinfo(struct net_device *dev,
 111                                struct ethtool_drvinfo *info)
 112 {
 113         strcpy(info->driver, "ibmtr_cs");
 114 }
 115
 116 static const struct ethtool_ops netdev_ethtool_ops = {
 117         .get_drvinfo            = netdev_get_drvinfo,
 118 };
 119
 120 static irqreturn_t ibmtr_interrupt(int irq, void *dev_id) {
 121         ibmtr_dev_t *info = dev_id;
 122         struct net_device *dev = info->dev;
 123         return tok_interrupt(irq, dev);
 124 };
 125
 126 /*======================================================================
 127
 128     ibmtr_attach() creates an "instance" of the driver, allocating
 129     local data structures for one device.  The device is registered
 130     with Card Services.
 131
 132 ======================================================================*/
 133
 134 static int __devinit ibmtr_attach(struct pcmcia_device *link)
 135 {
 136     ibmtr_dev_t *info;
 137     struct net_device *dev;
 138
 139     dev_dbg(&link->dev, "ibmtr_attach()\n");
 140
 141     /* Create new token-ring device */
 142     info = kzalloc(sizeof(*info), GFP_KERNEL);
 143     if (!info) return -ENOMEM;
 144     dev = alloc_trdev(sizeof(struct tok_info));
 145     if (!dev) {
 146         kfree(info);
 147         return -ENOMEM;
 148     }
 149
 150     info->p_dev = link;
 151     link->priv = info;
 152     info->ti = netdev_priv(dev);
 153
 154     link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 155     link->resource[0]->end = 4;
 156     link->conf.Attributes = CONF_ENABLE_IRQ;
 157     link->conf.IntType = INT_MEMORY_AND_IO;
 158     link->conf.Present = PRESENT_OPTION;
 159
 160     info->dev = dev;
 161
 162     SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
 163
 164     return ibmtr_config(link);
 165 } /* ibmtr_attach */
 166
 167 /*======================================================================
 168
 169     This deletes a driver "instance".  The device is de-registered
 170     with Card Services.  If it has been released, all local data
 171     structures are freed.  Otherwise, the structures will be freed
 172     when the device is released.
 173
 174 ======================================================================*/
 175
 176 static void ibmtr_detach(struct pcmcia_device *link)
 177 {
 178     struct ibmtr_dev_t *info = link->priv;
 179     struct net_device *dev = info->dev;
 180      struct tok_info *ti = netdev_priv(dev);
 181
 182     dev_dbg(&link->dev, "ibmtr_detach\n");
 183
 184     /*
 185      * When the card removal interrupt hits tok_interrupt(),
 186      * bail out early, so we don't crash the machine
 187      */
 188     ti->sram_phys |= 1;
 189
 190     unregister_netdev(dev);
 191
 192     del_timer_sync(&(ti->tr_timer));
 193
 194     ibmtr_release(link);
 195
 196     free_netdev(dev);
 197     kfree(info);
 198 } /* ibmtr_detach */
 199
 200 /*======================================================================
 201
 202     ibmtr_config() is scheduled to run after a CARD_INSERTION event
 203     is received, to configure the PCMCIA socket, and to make the
 204     token-ring device available to the system.
 205
 206 ======================================================================*/
 207
 208 static int __devinit ibmtr_config(struct pcmcia_device *link)
 209 {
 210     ibmtr_dev_t *info = link->priv;
 211     struct net_device *dev = info->dev;
 212     struct tok_info *ti = netdev_priv(dev);
 213     win_req_t req;
 214     int i, ret;
 215
 216     dev_dbg(&link->dev, "ibmtr_config\n");
 217
 218     link->conf.ConfigIndex = 0x61;
 219     link->io_lines = 16;
 220
 221     /* Determine if this is PRIMARY or ALTERNATE. */
 222
 223     /* Try PRIMARY card at 0xA20-0xA23 */
 224     link->resource[0]->start = 0xA20;
 225     i = pcmcia_request_io(link);
 226     if (i != 0) {
 227         /* Couldn't get 0xA20-0xA23.  Try ALTERNATE at 0xA24-0xA27. */
 228         link->resource[0]->start = 0xA24;
 229         ret = pcmcia_request_io(link);
 230         if (ret)
 231                 goto failed;
 232     }
 233     dev->base_addr = link->resource[0]->start;
 234
 235     ret = pcmcia_request_exclusive_irq(link, ibmtr_interrupt);
 236     if (ret)
 237             goto failed;
 238     dev->irq = link->irq;
 239     ti->irq = link->irq;
 240     ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
 241
 242     /* Allocate the MMIO memory window */
 243     req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
 244     req.Attributes |= WIN_USE_WAIT;
 245     req.Base = 0;
 246     req.Size = 0x2000;
 247     req.AccessSpeed = 250;
 248     ret = pcmcia_request_window(link, &req, &link->win);
 249     if (ret)
 250             goto failed;
 251
 252     ret = pcmcia_map_mem_page(link, link->win, mmiobase);
 253     if (ret)
 254             goto failed;
 255     ti->mmio = ioremap(req.Base, req.Size);
 256
 257     /* Allocate the SRAM memory window */
 258     req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
 259     req.Attributes |= WIN_USE_WAIT;
 260     req.Base = 0;
 261     req.Size = sramsize * 1024;
 262     req.AccessSpeed = 250;
 263     ret = pcmcia_request_window(link, &req, &info->sram_win_handle);
 264     if (ret)
 265             goto failed;
 266
 267     ret = pcmcia_map_mem_page(link, info->sram_win_handle, srambase);
 268     if (ret)
 269             goto failed;
 270
 271     ti->sram_base = srambase >> 12;
 272     ti->sram_virt = ioremap(req.Base, req.Size);
 273     ti->sram_phys = req.Base;
 274
 275     ret = pcmcia_request_configuration(link, &link->conf);
 276     if (ret)
 277             goto failed;
 278
 279     /*  Set up the Token-Ring Controller Configuration Register and
 280         turn on the card.  Check the "Local Area Network Credit Card
 281         Adapters Technical Reference"  SC30-3585 for this info.  */
 282     ibmtr_hw_setup(dev, mmiobase);
 283
 284     SET_NETDEV_DEV(dev, &link->dev);
 285
 286     i = ibmtr_probe_card(dev);
 287     if (i != 0) {
 288         printk(KERN_NOTICE "ibmtr_cs: register_netdev() failed\n");
 289         goto failed;
 290     }
 291
 292     printk(KERN_INFO
 293            "%s: port %#3lx, irq %d,  mmio %#5lx, sram %#5lx, hwaddr=%pM\n",
 294            dev->name, dev->base_addr, dev->irq,
 295            (u_long)ti->mmio, (u_long)(ti->sram_base << 12),
 296            dev->dev_addr);
 297     return 0;
 298
 299 failed:
 300     ibmtr_release(link);
 301     return -ENODEV;
 302 } /* ibmtr_config */
 303
 304 /*======================================================================
 305
 306     After a card is removed, ibmtr_release() will unregister the net
 307     device, and release the PCMCIA configuration.  If the device is
 308     still open, this will be postponed until it is closed.
 309
 310 ======================================================================*/
 311
 312 static void ibmtr_release(struct pcmcia_device *link)
 313 {
 314         ibmtr_dev_t *info = link->priv;
 315         struct net_device *dev = info->dev;
 316
 317         dev_dbg(&link->dev, "ibmtr_release\n");
 318
 319         if (link->win) {
 320                 struct tok_info *ti = netdev_priv(dev);
 321                 iounmap(ti->mmio);
 322         }
 323         pcmcia_disable_device(link);
 324 }
 325
 326 static int ibmtr_suspend(struct pcmcia_device *link)
 327 {
 328         ibmtr_dev_t *info = link->priv;
 329         struct net_device *dev = info->dev;
 330
 331         if (link->open)
 332                 netif_device_detach(dev);
 333
 334         return 0;
 335 }
 336
 337 static int __devinit ibmtr_resume(struct pcmcia_device *link)
 338 {
 339         ibmtr_dev_t *info = link->priv;
 340         struct net_device *dev = info->dev;
 341
 342         if (link->open) {
 343                 ibmtr_probe(dev);       /* really? */
 344                 netif_device_attach(dev);
 345         }
 346
 347         return 0;
 348 }
 349
 350
 351 /*====================================================================*/
 352
 353 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
 354 {
 355     int i;
 356
 357     /* Bizarre IBM behavior, there are 16 bits of information we
 358        need to set, but the card only allows us to send 4 bits at a
 359        time.  For each byte sent to base_addr, bits 7-4 tell the
 360        card which part of the 16 bits we are setting, bits 3-0 contain
 361        the actual information */
 362
 363     /* First nibble provides 4 bits of mmio */
 364     i = (mmiobase >> 16) & 0x0F;
 365     outb(i, dev->base_addr);
 366
 367     /* Second nibble provides 3 bits of mmio */
 368     i = 0x10 | ((mmiobase >> 12) & 0x0E);
 369     outb(i, dev->base_addr);
 370
 371     /* Third nibble, hard-coded values */
 372     i = 0x26;
 373     outb(i, dev->base_addr);
 374
 375     /* Fourth nibble sets shared ram page size */
 376
 377     /* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
 378     i = (sramsize >> 4) & 0x07;
 379     i = ((i == 4) ? 3 : i) << 2;
 380     i |= 0x30;
 381
 382     if (ringspeed == 16)
 383         i |= 2;
 384     if (dev->base_addr == 0xA24)
 385         i |= 1;
 386     outb(i, dev->base_addr);
 387
 388     /* 0x40 will release the card for use */
 389     outb(0x40, dev->base_addr);
 390 }
 391
 392 static struct pcmcia_device_id ibmtr_ids[] = {
 393         PCMCIA_DEVICE_PROD_ID12("3Com", "TokenLink Velocity PC Card", 0x41240e5b, 0x82c3734e),
 394         PCMCIA_DEVICE_PROD_ID12("IBM", "TOKEN RING", 0xb569a6e5, 0xbf8eed47),
 395         PCMCIA_DEVICE_NULL,
 396 };
 397 MODULE_DEVICE_TABLE(pcmcia, ibmtr_ids);
 398
 399 static struct pcmcia_driver ibmtr_cs_driver = {
 400         .owner          = THIS_MODULE,
 401         .drv            = {
 402                 .name   = "ibmtr_cs",
 403         },
 404         .probe          = ibmtr_attach,
 405         .remove         = ibmtr_detach,
 406         .id_table       = ibmtr_ids,
 407         .suspend        = ibmtr_suspend,
 408         .resume         = ibmtr_resume,
 409 };
 410
 411 static int __init init_ibmtr_cs(void)
 412 {
 413         return pcmcia_register_driver(&ibmtr_cs_driver);
 414 }
 415
 416 static void __exit exit_ibmtr_cs(void)
 417 {
 418         pcmcia_unregister_driver(&ibmtr_cs_driver);
 419 }
 420
 421 module_init(init_ibmtr_cs);
 422 module_exit(exit_ibmtr_cs);