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