drivers/isdn/hisax/teles_cs.c

   1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
   2 /*======================================================================
   3
   4     A teles S0 PCMCIA client driver
   5
   6     Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
   7     Written by Christof Petig, christof.petig@wtal.de
   8
   9     Also inspired by ELSA PCMCIA driver
  10     by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
  11
  12     Extentions to new hisax_pcmcia by Karsten Keil
  13
  14     minor changes to be compatible with kernel 2.4.x
  15     by Jan.Schubert@GMX.li
  16
  17 ======================================================================*/
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/sched.h>
  23 #include <linux/ptrace.h>
  24 #include <linux/slab.h>
  25 #include <linux/string.h>
  26 #include <linux/timer.h>
  27 #include <linux/ioport.h>
  28 #include <asm/io.h>
  29 #include <asm/system.h>
  30
  31 #include <pcmcia/cs_types.h>
  32 #include <pcmcia/cs.h>
  33 #include <pcmcia/cistpl.h>
  34 #include <pcmcia/cisreg.h>
  35 #include <pcmcia/ds.h>
  36 #include "hisax_cfg.h"
  37
  38 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
  39 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
  40 MODULE_LICENSE("GPL");
  41
  42 /*
  43    All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
  44    you do not define PCMCIA_DEBUG at all, all the debug code will be
  45    left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
  46    be present but disabled -- but it can then be enabled for specific
  47    modules at load time with a 'pc_debug=#' option to insmod.
  48 */
  49
  50 #ifdef PCMCIA_DEBUG
  51 static int pc_debug = PCMCIA_DEBUG;
  52 module_param(pc_debug, int, 0);
  53 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
  54 static char *version =
  55 "teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
  56 #else
  57 #define DEBUG(n, args...)
  58 #endif
  59
  60 /*====================================================================*/
  61
  62 /* Parameters that can be set with 'insmod' */
  63
  64 static int protocol = 2;        /* EURO-ISDN Default */
  65 module_param(protocol, int, 0);
  66
  67 /*====================================================================*/
  68
  69 /*
  70    The event() function is this driver's Card Services event handler.
  71    It will be called by Card Services when an appropriate card status
  72    event is received.  The config() and release() entry points are
  73    used to configure or release a socket, in response to card insertion
  74    and ejection events.  They are invoked from the teles_cs event
  75    handler.
  76 */
  77
  78 static int teles_cs_config(struct pcmcia_device *link);
  79 static void teles_cs_release(struct pcmcia_device *link);
  80
  81 /*
  82    The attach() and detach() entry points are used to create and destroy
  83    "instances" of the driver, where each instance represents everything
  84    needed to manage one actual PCMCIA card.
  85 */
  86
  87 static void teles_detach(struct pcmcia_device *p_dev);
  88
  89 /*
  90    A linked list of "instances" of the teles_cs device.  Each actual
  91    PCMCIA card corresponds to one device instance, and is described
  92    by one struct pcmcia_device structure (defined in ds.h).
  93
  94    You may not want to use a linked list for this -- for example, the
  95    memory card driver uses an array of struct pcmcia_device pointers, where minor
  96    device numbers are used to derive the corresponding array index.
  97 */
  98
  99 /*
 100    A driver needs to provide a dev_node_t structure for each device
 101    on a card.  In some cases, there is only one device per card (for
 102    example, ethernet cards, modems).  In other cases, there may be
 103    many actual or logical devices (SCSI adapters, memory cards with
 104    multiple partitions).  The dev_node_t structures need to be kept
 105    in a linked list starting at the 'dev' field of a struct pcmcia_device
 106    structure.  We allocate them in the card's private data structure,
 107    because they generally shouldn't be allocated dynamically.
 108    In this case, we also provide a flag to indicate if a device is
 109    "stopped" due to a power management event, or card ejection.  The
 110    device IO routines can use a flag like this to throttle IO to a
 111    card that is not ready to accept it.
 112 */
 113
 114 typedef struct local_info_t {
 115         struct pcmcia_device    *p_dev;
 116     dev_node_t          node;
 117     int                 busy;
 118     int                 cardnr;
 119 } local_info_t;
 120
 121 /*======================================================================
 122
 123     teles_attach() creates an "instance" of the driver, allocatingx
 124     local data structures for one device.  The device is registered
 125     with Card Services.
 126
 127     The dev_link structure is initialized, but we don't actually
 128     configure the card at this point -- we wait until we receive a
 129     card insertion event.
 130
 131 ======================================================================*/
 132
 133 static int teles_probe(struct pcmcia_device *link)
 134 {
 135     local_info_t *local;
 136
 137     DEBUG(0, "teles_attach()\n");
 138
 139     /* Allocate space for private device-specific data */
 140     local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
 141     if (!local) return -ENOMEM;
 142     memset(local, 0, sizeof(local_info_t));
 143     local->cardnr = -1;
 144
 145     local->p_dev = link;
 146     link->priv = local;
 147
 148     /* Interrupt setup */
 149     link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
 150     link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
 151     link->irq.Handler = NULL;
 152
 153     /*
 154       General socket configuration defaults can go here.  In this
 155       client, we assume very little, and rely on the CIS for almost
 156       everything.  In most clients, many details (i.e., number, sizes,
 157       and attributes of IO windows) are fixed by the nature of the
 158       device, and can be hard-wired here.
 159     */
 160     link->io.NumPorts1 = 96;
 161     link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 162     link->io.IOAddrLines = 5;
 163
 164     link->conf.Attributes = CONF_ENABLE_IRQ;
 165     link->conf.IntType = INT_MEMORY_AND_IO;
 166
 167     return teles_cs_config(link);
 168 } /* teles_attach */
 169
 170 /*======================================================================
 171
 172     This deletes a driver "instance".  The device is de-registered
 173     with Card Services.  If it has been released, all local data
 174     structures are freed.  Otherwise, the structures will be freed
 175     when the device is released.
 176
 177 ======================================================================*/
 178
 179 static void teles_detach(struct pcmcia_device *link)
 180 {
 181         local_info_t *info = link->priv;
 182
 183         DEBUG(0, "teles_detach(0x%p)\n", link);
 184
 185         info->busy = 1;
 186         teles_cs_release(link);
 187
 188         kfree(info);
 189 } /* teles_detach */
 190
 191 /*======================================================================
 192
 193     teles_cs_config() is scheduled to run after a CARD_INSERTION event
 194     is received, to configure the PCMCIA socket, and to make the
 195     device available to the system.
 196
 197 ======================================================================*/
 198 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 199                      cisparse_t *parse)
 200 {
 201     int i = pcmcia_get_tuple_data(handle, tuple);
 202     if (i != CS_SUCCESS) return i;
 203     return pcmcia_parse_tuple(handle, tuple, parse);
 204 }
 205
 206 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 207                      cisparse_t *parse)
 208 {
 209     int i = pcmcia_get_first_tuple(handle, tuple);
 210     if (i != CS_SUCCESS) return i;
 211     return get_tuple(handle, tuple, parse);
 212 }
 213
 214 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 215                      cisparse_t *parse)
 216 {
 217     int i = pcmcia_get_next_tuple(handle, tuple);
 218     if (i != CS_SUCCESS) return i;
 219     return get_tuple(handle, tuple, parse);
 220 }
 221
 222 static int teles_cs_config(struct pcmcia_device *link)
 223 {
 224     tuple_t tuple;
 225     cisparse_t parse;
 226     local_info_t *dev;
 227     int i, j, last_fn;
 228     u_short buf[128];
 229     cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 230     IsdnCard_t icard;
 231
 232     DEBUG(0, "teles_config(0x%p)\n", link);
 233     dev = link->priv;
 234
 235     /*
 236        This reads the card's CONFIG tuple to find its configuration
 237        registers.
 238     */
 239     tuple.DesiredTuple = CISTPL_CONFIG;
 240     tuple.TupleData = (cisdata_t *)buf;
 241     tuple.TupleDataMax = 255;
 242     tuple.TupleOffset = 0;
 243     tuple.Attributes = 0;
 244     i = first_tuple(link, &tuple, &parse);
 245     if (i != CS_SUCCESS) {
 246         last_fn = ParseTuple;
 247         goto cs_failed;
 248     }
 249     link->conf.ConfigBase = parse.config.base;
 250     link->conf.Present = parse.config.rmask[0];
 251
 252     tuple.TupleData = (cisdata_t *)buf;
 253     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 254     tuple.Attributes = 0;
 255     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 256     i = first_tuple(link, &tuple, &parse);
 257     while (i == CS_SUCCESS) {
 258         if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
 259             printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
 260             link->conf.ConfigIndex = cf->index;
 261             link->io.BasePort1 = cf->io.win[0].base;
 262             i = pcmcia_request_io(link, &link->io);
 263             if (i == CS_SUCCESS) break;
 264         } else {
 265           printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
 266           link->conf.ConfigIndex = cf->index;
 267           for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
 268             link->io.BasePort1 = j;
 269             i = pcmcia_request_io(link, &link->io);
 270             if (i == CS_SUCCESS) break;
 271           }
 272           break;
 273         }
 274         i = next_tuple(link, &tuple, &parse);
 275     }
 276
 277     if (i != CS_SUCCESS) {
 278         last_fn = RequestIO;
 279         goto cs_failed;
 280     }
 281
 282     i = pcmcia_request_irq(link, &link->irq);
 283     if (i != CS_SUCCESS) {
 284         link->irq.AssignedIRQ = 0;
 285         last_fn = RequestIRQ;
 286         goto cs_failed;
 287     }
 288
 289     i = pcmcia_request_configuration(link, &link->conf);
 290     if (i != CS_SUCCESS) {
 291       last_fn = RequestConfiguration;
 292       goto cs_failed;
 293     }
 294
 295     /* At this point, the dev_node_t structure(s) should be
 296        initialized and arranged in a linked list at link->dev. *//*  */
 297     sprintf(dev->node.dev_name, "teles");
 298     dev->node.major = dev->node.minor = 0x0;
 299
 300     link->dev_node = &dev->node;
 301
 302     /* Finally, report what we've done */
 303     printk(KERN_INFO "%s: index 0x%02x:",
 304            dev->node.dev_name, link->conf.ConfigIndex);
 305     if (link->conf.Attributes & CONF_ENABLE_IRQ)
 306         printk(", irq %d", link->irq.AssignedIRQ);
 307     if (link->io.NumPorts1)
 308         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 309                link->io.BasePort1+link->io.NumPorts1-1);
 310     if (link->io.NumPorts2)
 311         printk(" & 0x%04x-0x%04x", link->io.BasePort2,
 312                link->io.BasePort2+link->io.NumPorts2-1);
 313     printk("\n");
 314
 315     icard.para[0] = link->irq.AssignedIRQ;
 316     icard.para[1] = link->io.BasePort1;
 317     icard.protocol = protocol;
 318     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 319
 320     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 321     if (i < 0) {
 322         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 323                 i, link->io.BasePort1);
 324         teles_cs_release(link);
 325         return -ENODEV;
 326     }
 327
 328     ((local_info_t*)link->priv)->cardnr = i;
 329     return 0;
 330
 331 cs_failed:
 332     cs_error(link, last_fn, i);
 333     teles_cs_release(link);
 334     return -ENODEV;
 335 } /* teles_cs_config */
 336
 337 /*======================================================================
 338
 339     After a card is removed, teles_cs_release() will unregister the net
 340     device, and release the PCMCIA configuration.  If the device is
 341     still open, this will be postponed until it is closed.
 342
 343 ======================================================================*/
 344
 345 static void teles_cs_release(struct pcmcia_device *link)
 346 {
 347     local_info_t *local = link->priv;
 348
 349     DEBUG(0, "teles_cs_release(0x%p)\n", link);
 350
 351     if (local) {
 352         if (local->cardnr >= 0) {
 353             /* no unregister function with hisax */
 354             HiSax_closecard(local->cardnr);
 355         }
 356     }
 357
 358     pcmcia_disable_device(link);
 359 } /* teles_cs_release */
 360
 361 static int teles_suspend(struct pcmcia_device *link)
 362 {
 363         local_info_t *dev = link->priv;
 364
 365         dev->busy = 1;
 366
 367         return 0;
 368 }
 369
 370 static int teles_resume(struct pcmcia_device *link)
 371 {
 372         local_info_t *dev = link->priv;
 373
 374         dev->busy = 0;
 375
 376         return 0;
 377 }
 378
 379
 380 static struct pcmcia_device_id teles_ids[] = {
 381         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 382         PCMCIA_DEVICE_NULL,
 383 };
 384 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 385
 386 static struct pcmcia_driver teles_cs_driver = {
 387         .owner          = THIS_MODULE,
 388         .drv            = {
 389                 .name   = "teles_cs",
 390         },
 391         .probe          = teles_probe,
 392         .remove         = teles_detach,
 393         .id_table       = teles_ids,
 394         .suspend        = teles_suspend,
 395         .resume         = teles_resume,
 396 };
 397
 398 static int __init init_teles_cs(void)
 399 {
 400         return pcmcia_register_driver(&teles_cs_driver);
 401 }
 402
 403 static void __exit exit_teles_cs(void)
 404 {
 405         pcmcia_unregister_driver(&teles_cs_driver);
 406 }
 407
 408 module_init(init_teles_cs);
 409 module_exit(exit_teles_cs);