drivers/isdn/hisax/avma1_cs.c

   1 /*
   2  * PCMCIA client driver for AVM A1 / Fritz!PCMCIA
   3  *
   4  * Author       Carsten Paeth
   5  * Copyright    1998-2001 by Carsten Paeth <calle@calle.in-berlin.de>
   6  *
   7  * This software may be used and distributed according to the terms
   8  * of the GNU General Public License, incorporated herein by reference.
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/sched.h>
  18 #include <linux/ptrace.h>
  19 #include <linux/slab.h>
  20 #include <linux/string.h>
  21 #include <asm/io.h>
  22 #include <asm/system.h>
  23
  24 #include <pcmcia/cs_types.h>
  25 #include <pcmcia/cs.h>
  26 #include <pcmcia/cistpl.h>
  27 #include <pcmcia/ds.h>
  28 #include "hisax_cfg.h"
  29
  30 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
  31 MODULE_AUTHOR("Carsten Paeth");
  32 MODULE_LICENSE("GPL");
  33
  34 /*
  35    All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
  36    you do not define PCMCIA_DEBUG at all, all the debug code will be
  37    left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
  38    be present but disabled -- but it can then be enabled for specific
  39    modules at load time with a 'pc_debug=#' option to insmod.
  40 */
  41 #ifdef PCMCIA_DEBUG
  42 static int pc_debug = PCMCIA_DEBUG;
  43 module_param(pc_debug, int, 0);
  44 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
  45 static char *version =
  46 "avma1_cs.c 1.00 1998/01/23 10:00:00 (Carsten Paeth)";
  47 #else
  48 #define DEBUG(n, args...)
  49 #endif
  50
  51 /*====================================================================*/
  52
  53 /* Parameters that can be set with 'insmod' */
  54
  55 static int isdnprot = 2;
  56
  57 module_param(isdnprot, int, 0);
  58
  59 /*====================================================================*/
  60
  61 /*
  62    The event() function is this driver's Card Services event handler.
  63    It will be called by Card Services when an appropriate card status
  64    event is received.  The config() and release() entry points are
  65    used to configure or release a socket, in response to card insertion
  66    and ejection events.  They are invoked from the skeleton event
  67    handler.
  68 */
  69
  70 static int avma1cs_config(struct pcmcia_device *link);
  71 static void avma1cs_release(struct pcmcia_device *link);
  72
  73 /*
  74    The attach() and detach() entry points are used to create and destroy
  75    "instances" of the driver, where each instance represents everything
  76    needed to manage one actual PCMCIA card.
  77 */
  78
  79 static void avma1cs_detach(struct pcmcia_device *p_dev);
  80
  81
  82 /*
  83    A linked list of "instances" of the skeleton device.  Each actual
  84    PCMCIA card corresponds to one device instance, and is described
  85    by one struct pcmcia_device structure (defined in ds.h).
  86
  87    You may not want to use a linked list for this -- for example, the
  88    memory card driver uses an array of struct pcmcia_device pointers, where minor
  89    device numbers are used to derive the corresponding array index.
  90 */
  91
  92 /*
  93    A driver needs to provide a dev_node_t structure for each device
  94    on a card.  In some cases, there is only one device per card (for
  95    example, ethernet cards, modems).  In other cases, there may be
  96    many actual or logical devices (SCSI adapters, memory cards with
  97    multiple partitions).  The dev_node_t structures need to be kept
  98    in a linked list starting at the 'dev' field of a struct pcmcia_device
  99    structure.  We allocate them in the card's private data structure,
 100    because they generally can't be allocated dynamically.
 101 */
 102
 103 typedef struct local_info_t {
 104     dev_node_t  node;
 105 } local_info_t;
 106
 107 /*======================================================================
 108
 109     avma1cs_attach() creates an "instance" of the driver, allocating
 110     local data structures for one device.  The device is registered
 111     with Card Services.
 112
 113     The dev_link structure is initialized, but we don't actually
 114     configure the card at this point -- we wait until we receive a
 115     card insertion event.
 116
 117 ======================================================================*/
 118
 119 static int avma1cs_probe(struct pcmcia_device *p_dev)
 120 {
 121     local_info_t *local;
 122
 123     DEBUG(0, "avma1cs_attach()\n");
 124
 125     /* Allocate space for private device-specific data */
 126     local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
 127     if (!local)
 128         return -ENOMEM;
 129
 130     memset(local, 0, sizeof(local_info_t));
 131     p_dev->priv = local;
 132
 133     /* The io structure describes IO port mapping */
 134     p_dev->io.NumPorts1 = 16;
 135     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 136     p_dev->io.NumPorts2 = 16;
 137     p_dev->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
 138     p_dev->io.IOAddrLines = 5;
 139
 140     /* Interrupt setup */
 141     p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 142     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
 143
 144     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 145
 146     /* General socket configuration */
 147     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 148     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 149     p_dev->conf.ConfigIndex = 1;
 150     p_dev->conf.Present = PRESENT_OPTION;
 151
 152     return avma1cs_config(p_dev);
 153 } /* avma1cs_attach */
 154
 155 /*======================================================================
 156
 157     This deletes a driver "instance".  The device is de-registered
 158     with Card Services.  If it has been released, all local data
 159     structures are freed.  Otherwise, the structures will be freed
 160     when the device is released.
 161
 162 ======================================================================*/
 163
 164 static void avma1cs_detach(struct pcmcia_device *link)
 165 {
 166         DEBUG(0, "avma1cs_detach(0x%p)\n", link);
 167         avma1cs_release(link);
 168         kfree(link->priv);
 169 } /* avma1cs_detach */
 170
 171 /*======================================================================
 172
 173     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 174     is received, to configure the PCMCIA socket, and to make the
 175     ethernet device available to the system.
 176
 177 ======================================================================*/
 178
 179 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 180                      cisparse_t *parse)
 181 {
 182     int i = pcmcia_get_tuple_data(handle, tuple);
 183     if (i != CS_SUCCESS) return i;
 184     return pcmcia_parse_tuple(handle, tuple, parse);
 185 }
 186
 187 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 188                      cisparse_t *parse)
 189 {
 190     int i = pcmcia_get_first_tuple(handle, tuple);
 191     if (i != CS_SUCCESS) return i;
 192     return get_tuple(handle, tuple, parse);
 193 }
 194
 195 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 196                      cisparse_t *parse)
 197 {
 198     int i = pcmcia_get_next_tuple(handle, tuple);
 199     if (i != CS_SUCCESS) return i;
 200     return get_tuple(handle, tuple, parse);
 201 }
 202
 203 static int avma1cs_config(struct pcmcia_device *link)
 204 {
 205     tuple_t tuple;
 206     cisparse_t parse;
 207     cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 208     local_info_t *dev;
 209     int i;
 210     u_char buf[64];
 211     char devname[128];
 212     IsdnCard_t  icard;
 213     int busy = 0;
 214
 215     dev = link->priv;
 216
 217     DEBUG(0, "avma1cs_config(0x%p)\n", link);
 218
 219     /*
 220        This reads the card's CONFIG tuple to find its configuration
 221        registers.
 222     */
 223     do {
 224         tuple.DesiredTuple = CISTPL_CONFIG;
 225         i = pcmcia_get_first_tuple(link, &tuple);
 226         if (i != CS_SUCCESS) break;
 227         tuple.TupleData = buf;
 228         tuple.TupleDataMax = 64;
 229         tuple.TupleOffset = 0;
 230         i = pcmcia_get_tuple_data(link, &tuple);
 231         if (i != CS_SUCCESS) break;
 232         i = pcmcia_parse_tuple(link, &tuple, &parse);
 233         if (i != CS_SUCCESS) break;
 234         link->conf.ConfigBase = parse.config.base;
 235     } while (0);
 236     if (i != CS_SUCCESS) {
 237         cs_error(link, ParseTuple, i);
 238         return -ENODEV;
 239     }
 240
 241     do {
 242
 243         tuple.Attributes = 0;
 244         tuple.TupleData = buf;
 245         tuple.TupleDataMax = 254;
 246         tuple.TupleOffset = 0;
 247         tuple.DesiredTuple = CISTPL_VERS_1;
 248
 249         devname[0] = 0;
 250         if( !first_tuple(link, &tuple, &parse) && parse.version_1.ns > 1 ) {
 251             strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1],
 252                         sizeof(devname));
 253         }
 254         /*
 255          * find IO port
 256          */
 257         tuple.TupleData = (cisdata_t *)buf;
 258         tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 259         tuple.Attributes = 0;
 260         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 261         i = first_tuple(link, &tuple, &parse);
 262         while (i == CS_SUCCESS) {
 263             if (cf->io.nwin > 0) {
 264                 link->conf.ConfigIndex = cf->index;
 265                 link->io.BasePort1 = cf->io.win[0].base;
 266                 link->io.NumPorts1 = cf->io.win[0].len;
 267                 link->io.NumPorts2 = 0;
 268                 printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
 269                         link->io.BasePort1,
 270                         link->io.BasePort1+link->io.NumPorts1 - 1);
 271                 i = pcmcia_request_io(link, &link->io);
 272                 if (i == CS_SUCCESS) goto found_port;
 273             }
 274             i = next_tuple(link, &tuple, &parse);
 275         }
 276
 277 found_port:
 278         if (i != CS_SUCCESS) {
 279             cs_error(link, RequestIO, i);
 280             break;
 281         }
 282
 283         /*
 284          * allocate an interrupt line
 285          */
 286         i = pcmcia_request_irq(link, &link->irq);
 287         if (i != CS_SUCCESS) {
 288             cs_error(link, RequestIRQ, i);
 289             /* undo */
 290             pcmcia_disable_device(link);
 291             break;
 292         }
 293
 294         /*
 295          * configure the PCMCIA socket
 296          */
 297         i = pcmcia_request_configuration(link, &link->conf);
 298         if (i != CS_SUCCESS) {
 299             cs_error(link, RequestConfiguration, i);
 300             pcmcia_disable_device(link);
 301             break;
 302         }
 303
 304     } while (0);
 305
 306     /* At this point, the dev_node_t structure(s) should be
 307        initialized and arranged in a linked list at link->dev. */
 308
 309     strcpy(dev->node.dev_name, "A1");
 310     dev->node.major = 45;
 311     dev->node.minor = 0;
 312     link->dev_node = &dev->node;
 313
 314     /* If any step failed, release any partially configured state */
 315     if (i != 0) {
 316         avma1cs_release(link);
 317         return -ENODEV;
 318     }
 319
 320     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 321                                 link->io.BasePort1, link->irq.AssignedIRQ);
 322
 323     icard.para[0] = link->irq.AssignedIRQ;
 324     icard.para[1] = link->io.BasePort1;
 325     icard.protocol = isdnprot;
 326     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 327
 328     i = hisax_init_pcmcia(link, &busy, &icard);
 329     if (i < 0) {
 330         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
 331         avma1cs_release(link);
 332         return -ENODEV;
 333     }
 334     dev->node.minor = i;
 335
 336     return 0;
 337 } /* avma1cs_config */
 338
 339 /*======================================================================
 340
 341     After a card is removed, avma1cs_release() will unregister the net
 342     device, and release the PCMCIA configuration.  If the device is
 343     still open, this will be postponed until it is closed.
 344
 345 ======================================================================*/
 346
 347 static void avma1cs_release(struct pcmcia_device *link)
 348 {
 349         local_info_t *local = link->priv;
 350
 351         DEBUG(0, "avma1cs_release(0x%p)\n", link);
 352
 353         /* now unregister function with hisax */
 354         HiSax_closecard(local->node.minor);
 355
 356         pcmcia_disable_device(link);
 357 } /* avma1cs_release */
 358
 359
 360 static struct pcmcia_device_id avma1cs_ids[] = {
 361         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 362         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 363         PCMCIA_DEVICE_NULL
 364 };
 365 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 366
 367 static struct pcmcia_driver avma1cs_driver = {
 368         .owner          = THIS_MODULE,
 369         .drv            = {
 370                 .name   = "avma1_cs",
 371         },
 372         .probe          = avma1cs_probe,
 373         .remove         = avma1cs_detach,
 374         .id_table       = avma1cs_ids,
 375 };
 376
 377 /*====================================================================*/
 378
 379 static int __init init_avma1_cs(void)
 380 {
 381         return(pcmcia_register_driver(&avma1cs_driver));
 382 }
 383
 384 static void __exit exit_avma1_cs(void)
 385 {
 386         pcmcia_unregister_driver(&avma1cs_driver);
 387 }
 388
 389 module_init(init_avma1_cs);
 390 module_exit(exit_avma1_cs);