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 = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 127     if (!local)
 128         return -ENOMEM;
 129
 130     p_dev->priv = local;
 131
 132     /* The io structure describes IO port mapping */
 133     p_dev->io.NumPorts1 = 16;
 134     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 135     p_dev->io.NumPorts2 = 16;
 136     p_dev->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
 137     p_dev->io.IOAddrLines = 5;
 138
 139     /* Interrupt setup */
 140     p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 141     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
 142
 143     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 144
 145     /* General socket configuration */
 146     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 147     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 148     p_dev->conf.ConfigIndex = 1;
 149     p_dev->conf.Present = PRESENT_OPTION;
 150
 151     return avma1cs_config(p_dev);
 152 } /* avma1cs_attach */
 153
 154 /*======================================================================
 155
 156     This deletes a driver "instance".  The device is de-registered
 157     with Card Services.  If it has been released, all local data
 158     structures are freed.  Otherwise, the structures will be freed
 159     when the device is released.
 160
 161 ======================================================================*/
 162
 163 static void avma1cs_detach(struct pcmcia_device *link)
 164 {
 165         DEBUG(0, "avma1cs_detach(0x%p)\n", link);
 166         avma1cs_release(link);
 167         kfree(link->priv);
 168 } /* avma1cs_detach */
 169
 170 /*======================================================================
 171
 172     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 173     is received, to configure the PCMCIA socket, and to make the
 174     ethernet device available to the system.
 175
 176 ======================================================================*/
 177
 178 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 179                      cisparse_t *parse)
 180 {
 181     int i = pcmcia_get_tuple_data(handle, tuple);
 182     if (i != CS_SUCCESS) return i;
 183     return pcmcia_parse_tuple(handle, tuple, parse);
 184 }
 185
 186 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 187                      cisparse_t *parse)
 188 {
 189     int i = pcmcia_get_first_tuple(handle, tuple);
 190     if (i != CS_SUCCESS) return i;
 191     return get_tuple(handle, tuple, parse);
 192 }
 193
 194 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple,
 195                      cisparse_t *parse)
 196 {
 197     int i = pcmcia_get_next_tuple(handle, tuple);
 198     if (i != CS_SUCCESS) return i;
 199     return get_tuple(handle, tuple, parse);
 200 }
 201
 202 static int avma1cs_config(struct pcmcia_device *link)
 203 {
 204     tuple_t tuple;
 205     cisparse_t parse;
 206     cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 207     local_info_t *dev;
 208     int i;
 209     u_char buf[64];
 210     char devname[128];
 211     IsdnCard_t  icard;
 212     int busy = 0;
 213
 214     dev = link->priv;
 215
 216     DEBUG(0, "avma1cs_config(0x%p)\n", link);
 217
 218     do {
 219         devname[0] = 0;
 220         if (link->prod_id[1])
 221                 strlcpy(devname, link->prod_id[1], sizeof(devname));
 222
 223         /*
 224          * find IO port
 225          */
 226         tuple.TupleData = (cisdata_t *)buf;
 227         tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 228         tuple.Attributes = 0;
 229         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 230         i = first_tuple(link, &tuple, &parse);
 231         while (i == CS_SUCCESS) {
 232             if (cf->io.nwin > 0) {
 233                 link->conf.ConfigIndex = cf->index;
 234                 link->io.BasePort1 = cf->io.win[0].base;
 235                 link->io.NumPorts1 = cf->io.win[0].len;
 236                 link->io.NumPorts2 = 0;
 237                 printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
 238                         link->io.BasePort1,
 239                         link->io.BasePort1+link->io.NumPorts1 - 1);
 240                 i = pcmcia_request_io(link, &link->io);
 241                 if (i == CS_SUCCESS) goto found_port;
 242             }
 243             i = next_tuple(link, &tuple, &parse);
 244         }
 245
 246 found_port:
 247         if (i != CS_SUCCESS) {
 248             cs_error(link, RequestIO, i);
 249             break;
 250         }
 251
 252         /*
 253          * allocate an interrupt line
 254          */
 255         i = pcmcia_request_irq(link, &link->irq);
 256         if (i != CS_SUCCESS) {
 257             cs_error(link, RequestIRQ, i);
 258             /* undo */
 259             pcmcia_disable_device(link);
 260             break;
 261         }
 262
 263         /*
 264          * configure the PCMCIA socket
 265          */
 266         i = pcmcia_request_configuration(link, &link->conf);
 267         if (i != CS_SUCCESS) {
 268             cs_error(link, RequestConfiguration, i);
 269             pcmcia_disable_device(link);
 270             break;
 271         }
 272
 273     } while (0);
 274
 275     /* At this point, the dev_node_t structure(s) should be
 276        initialized and arranged in a linked list at link->dev. */
 277
 278     strcpy(dev->node.dev_name, "A1");
 279     dev->node.major = 45;
 280     dev->node.minor = 0;
 281     link->dev_node = &dev->node;
 282
 283     /* If any step failed, release any partially configured state */
 284     if (i != 0) {
 285         avma1cs_release(link);
 286         return -ENODEV;
 287     }
 288
 289     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 290                                 link->io.BasePort1, link->irq.AssignedIRQ);
 291
 292     icard.para[0] = link->irq.AssignedIRQ;
 293     icard.para[1] = link->io.BasePort1;
 294     icard.protocol = isdnprot;
 295     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 296
 297     i = hisax_init_pcmcia(link, &busy, &icard);
 298     if (i < 0) {
 299         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
 300         avma1cs_release(link);
 301         return -ENODEV;
 302     }
 303     dev->node.minor = i;
 304
 305     return 0;
 306 } /* avma1cs_config */
 307
 308 /*======================================================================
 309
 310     After a card is removed, avma1cs_release() will unregister the net
 311     device, and release the PCMCIA configuration.  If the device is
 312     still open, this will be postponed until it is closed.
 313
 314 ======================================================================*/
 315
 316 static void avma1cs_release(struct pcmcia_device *link)
 317 {
 318         local_info_t *local = link->priv;
 319
 320         DEBUG(0, "avma1cs_release(0x%p)\n", link);
 321
 322         /* now unregister function with hisax */
 323         HiSax_closecard(local->node.minor);
 324
 325         pcmcia_disable_device(link);
 326 } /* avma1cs_release */
 327
 328
 329 static struct pcmcia_device_id avma1cs_ids[] = {
 330         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 331         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 332         PCMCIA_DEVICE_NULL
 333 };
 334 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 335
 336 static struct pcmcia_driver avma1cs_driver = {
 337         .owner          = THIS_MODULE,
 338         .drv            = {
 339                 .name   = "avma1_cs",
 340         },
 341         .probe          = avma1cs_probe,
 342         .remove         = avma1cs_detach,
 343         .id_table       = avma1cs_ids,
 344 };
 345
 346 /*====================================================================*/
 347
 348 static int __init init_avma1_cs(void)
 349 {
 350         return(pcmcia_register_driver(&avma1cs_driver));
 351 }
 352
 353 static void __exit exit_avma1_cs(void)
 354 {
 355         pcmcia_unregister_driver(&avma1cs_driver);
 356 }
 357
 358 module_init(init_avma1_cs);
 359 module_exit(exit_avma1_cs);