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     do {
 220         devname[0] = 0;
 221         if (link->prod_id[1])
 222                 strlcpy(devname, link->prod_id[1], sizeof(devname));
 223
 224         /*
 225          * find IO port
 226          */
 227         tuple.TupleData = (cisdata_t *)buf;
 228         tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 229         tuple.Attributes = 0;
 230         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 231         i = first_tuple(link, &tuple, &parse);
 232         while (i == CS_SUCCESS) {
 233             if (cf->io.nwin > 0) {
 234                 link->conf.ConfigIndex = cf->index;
 235                 link->io.BasePort1 = cf->io.win[0].base;
 236                 link->io.NumPorts1 = cf->io.win[0].len;
 237                 link->io.NumPorts2 = 0;
 238                 printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
 239                         link->io.BasePort1,
 240                         link->io.BasePort1+link->io.NumPorts1 - 1);
 241                 i = pcmcia_request_io(link, &link->io);
 242                 if (i == CS_SUCCESS) goto found_port;
 243             }
 244             i = next_tuple(link, &tuple, &parse);
 245         }
 246
 247 found_port:
 248         if (i != CS_SUCCESS) {
 249             cs_error(link, RequestIO, i);
 250             break;
 251         }
 252
 253         /*
 254          * allocate an interrupt line
 255          */
 256         i = pcmcia_request_irq(link, &link->irq);
 257         if (i != CS_SUCCESS) {
 258             cs_error(link, RequestIRQ, i);
 259             /* undo */
 260             pcmcia_disable_device(link);
 261             break;
 262         }
 263
 264         /*
 265          * configure the PCMCIA socket
 266          */
 267         i = pcmcia_request_configuration(link, &link->conf);
 268         if (i != CS_SUCCESS) {
 269             cs_error(link, RequestConfiguration, i);
 270             pcmcia_disable_device(link);
 271             break;
 272         }
 273
 274     } while (0);
 275
 276     /* At this point, the dev_node_t structure(s) should be
 277        initialized and arranged in a linked list at link->dev. */
 278
 279     strcpy(dev->node.dev_name, "A1");
 280     dev->node.major = 45;
 281     dev->node.minor = 0;
 282     link->dev_node = &dev->node;
 283
 284     /* If any step failed, release any partially configured state */
 285     if (i != 0) {
 286         avma1cs_release(link);
 287         return -ENODEV;
 288     }
 289
 290     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 291                                 link->io.BasePort1, link->irq.AssignedIRQ);
 292
 293     icard.para[0] = link->irq.AssignedIRQ;
 294     icard.para[1] = link->io.BasePort1;
 295     icard.protocol = isdnprot;
 296     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 297
 298     i = hisax_init_pcmcia(link, &busy, &icard);
 299     if (i < 0) {
 300         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
 301         avma1cs_release(link);
 302         return -ENODEV;
 303     }
 304     dev->node.minor = i;
 305
 306     return 0;
 307 } /* avma1cs_config */
 308
 309 /*======================================================================
 310
 311     After a card is removed, avma1cs_release() will unregister the net
 312     device, and release the PCMCIA configuration.  If the device is
 313     still open, this will be postponed until it is closed.
 314
 315 ======================================================================*/
 316
 317 static void avma1cs_release(struct pcmcia_device *link)
 318 {
 319         local_info_t *local = link->priv;
 320
 321         DEBUG(0, "avma1cs_release(0x%p)\n", link);
 322
 323         /* now unregister function with hisax */
 324         HiSax_closecard(local->node.minor);
 325
 326         pcmcia_disable_device(link);
 327 } /* avma1cs_release */
 328
 329
 330 static struct pcmcia_device_id avma1cs_ids[] = {
 331         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 332         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 333         PCMCIA_DEVICE_NULL
 334 };
 335 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 336
 337 static struct pcmcia_driver avma1cs_driver = {
 338         .owner          = THIS_MODULE,
 339         .drv            = {
 340                 .name   = "avma1_cs",
 341         },
 342         .probe          = avma1cs_probe,
 343         .remove         = avma1cs_detach,
 344         .id_table       = avma1cs_ids,
 345 };
 346
 347 /*====================================================================*/
 348
 349 static int __init init_avma1_cs(void)
 350 {
 351         return(pcmcia_register_driver(&avma1cs_driver));
 352 }
 353
 354 static void __exit exit_avma1_cs(void)
 355 {
 356         pcmcia_unregister_driver(&avma1cs_driver);
 357 }
 358
 359 module_init(init_avma1_cs);
 360 module_exit(exit_avma1_cs);