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