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                                 cistpl_cftable_entry_t *dflt,
 200                                 unsigned int vcc,
 201                                 void *priv_data)
 202 {
 203         int j;
 204
 205         if ((cf->io.nwin > 0) && cf->io.win[0].base) {
 206                 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
 207                 p_dev->io.BasePort1 = cf->io.win[0].base;
 208                 if (!pcmcia_request_io(p_dev, &p_dev->io))
 209                         return 0;
 210         } else {
 211                 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
 212                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 213                         p_dev->io.BasePort1 = j;
 214                         if (!pcmcia_request_io(p_dev, &p_dev->io))
 215                                 return 0;
 216                 }
 217         }
 218         return -ENODEV;
 219 }
 220
 221 static int teles_cs_config(struct pcmcia_device *link)
 222 {
 223     local_info_t *dev;
 224     int i, last_fn;
 225     IsdnCard_t icard;
 226
 227     DEBUG(0, "teles_config(0x%p)\n", link);
 228     dev = link->priv;
 229
 230     i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
 231     if (i != 0) {
 232         last_fn = RequestIO;
 233         goto cs_failed;
 234     }
 235
 236     i = pcmcia_request_irq(link, &link->irq);
 237     if (i != 0) {
 238         link->irq.AssignedIRQ = 0;
 239         last_fn = RequestIRQ;
 240         goto cs_failed;
 241     }
 242
 243     i = pcmcia_request_configuration(link, &link->conf);
 244     if (i != 0) {
 245       last_fn = RequestConfiguration;
 246       goto cs_failed;
 247     }
 248
 249     /* At this point, the dev_node_t structure(s) should be
 250        initialized and arranged in a linked list at link->dev. *//*  */
 251     sprintf(dev->node.dev_name, "teles");
 252     dev->node.major = dev->node.minor = 0x0;
 253
 254     link->dev_node = &dev->node;
 255
 256     /* Finally, report what we've done */
 257     printk(KERN_INFO "%s: index 0x%02x:",
 258            dev->node.dev_name, link->conf.ConfigIndex);
 259     if (link->conf.Attributes & CONF_ENABLE_IRQ)
 260         printk(", irq %d", link->irq.AssignedIRQ);
 261     if (link->io.NumPorts1)
 262         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 263                link->io.BasePort1+link->io.NumPorts1-1);
 264     if (link->io.NumPorts2)
 265         printk(" & 0x%04x-0x%04x", link->io.BasePort2,
 266                link->io.BasePort2+link->io.NumPorts2-1);
 267     printk("\n");
 268
 269     icard.para[0] = link->irq.AssignedIRQ;
 270     icard.para[1] = link->io.BasePort1;
 271     icard.protocol = protocol;
 272     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 273
 274     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 275     if (i < 0) {
 276         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 277                 i, link->io.BasePort1);
 278         teles_cs_release(link);
 279         return -ENODEV;
 280     }
 281
 282     ((local_info_t*)link->priv)->cardnr = i;
 283     return 0;
 284
 285 cs_failed:
 286     cs_error(link, last_fn, i);
 287     teles_cs_release(link);
 288     return -ENODEV;
 289 } /* teles_cs_config */
 290
 291 /*======================================================================
 292
 293     After a card is removed, teles_cs_release() will unregister the net
 294     device, and release the PCMCIA configuration.  If the device is
 295     still open, this will be postponed until it is closed.
 296
 297 ======================================================================*/
 298
 299 static void teles_cs_release(struct pcmcia_device *link)
 300 {
 301     local_info_t *local = link->priv;
 302
 303     DEBUG(0, "teles_cs_release(0x%p)\n", link);
 304
 305     if (local) {
 306         if (local->cardnr >= 0) {
 307             /* no unregister function with hisax */
 308             HiSax_closecard(local->cardnr);
 309         }
 310     }
 311
 312     pcmcia_disable_device(link);
 313 } /* teles_cs_release */
 314
 315 static int teles_suspend(struct pcmcia_device *link)
 316 {
 317         local_info_t *dev = link->priv;
 318
 319         dev->busy = 1;
 320
 321         return 0;
 322 }
 323
 324 static int teles_resume(struct pcmcia_device *link)
 325 {
 326         local_info_t *dev = link->priv;
 327
 328         dev->busy = 0;
 329
 330         return 0;
 331 }
 332
 333
 334 static struct pcmcia_device_id teles_ids[] = {
 335         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 336         PCMCIA_DEVICE_NULL,
 337 };
 338 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 339
 340 static struct pcmcia_driver teles_cs_driver = {
 341         .owner          = THIS_MODULE,
 342         .drv            = {
 343                 .name   = "teles_cs",
 344         },
 345         .probe          = teles_probe,
 346         .remove         = teles_detach,
 347         .id_table       = teles_ids,
 348         .suspend        = teles_suspend,
 349         .resume         = teles_resume,
 350 };
 351
 352 static int __init init_teles_cs(void)
 353 {
 354         return pcmcia_register_driver(&teles_cs_driver);
 355 }
 356
 357 static void __exit exit_teles_cs(void)
 358 {
 359         pcmcia_unregister_driver(&teles_cs_driver);
 360 }
 361
 362 module_init(init_teles_cs);
 363 module_exit(exit_teles_cs);