drivers/isdn/hisax/elsa_cs.c

   1 /*======================================================================
   2
   3     An elsa_cs PCMCIA client driver
   4
   5     This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink
   6
   7
   8     The contents of this file are subject to the Mozilla Public
   9     License Version 1.1 (the "License"); you may not use this file
  10     except in compliance with the License. You may obtain a copy of
  11     the License at http://www.mozilla.org/MPL/
  12
  13     Software distributed under the License is distributed on an "AS
  14     IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  15     implied. See the License for the specific language governing
  16     rights and limitations under the License.
  17
  18     The initial developer of the original code is David A. Hinds
  19     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  20     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  21
  22     Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
  23     Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.
  24
  25     Alternatively, the contents of this file may be used under the
  26     terms of the GNU General Public License version 2 (the "GPL"), in
  27     which case the provisions of the GPL are applicable instead of the
  28     above.  If you wish to allow the use of your version of this file
  29     only under the terms of the GPL and not to allow others to use
  30     your version of this file under the MPL, indicate your decision
  31     by deleting the provisions above and replace them with the notice
  32     and other provisions required by the GPL.  If you do not delete
  33     the provisions above, a recipient may use your version of this
  34     file under either the MPL or the GPL.
  35
  36 ======================================================================*/
  37
  38 #include <linux/module.h>
  39 #include <linux/kernel.h>
  40 #include <linux/init.h>
  41 #include <linux/ptrace.h>
  42 #include <linux/slab.h>
  43 #include <linux/string.h>
  44 #include <linux/timer.h>
  45 #include <linux/ioport.h>
  46 #include <asm/io.h>
  47 #include <asm/system.h>
  48
  49 #include <pcmcia/cistpl.h>
  50 #include <pcmcia/cisreg.h>
  51 #include <pcmcia/ds.h>
  52 #include "hisax_cfg.h"
  53
  54 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
  55 MODULE_AUTHOR("Klaus Lichtenwalder");
  56 MODULE_LICENSE("Dual MPL/GPL");
  57
  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 elsa_cs event
  74    handler.
  75 */
  76
  77 static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
  78 static void elsa_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 elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;
  87
  88 typedef struct local_info_t {
  89         struct pcmcia_device    *p_dev;
  90     int                 busy;
  91     int                 cardnr;
  92 } local_info_t;
  93
  94 /*======================================================================
  95
  96     elsa_cs_attach() creates an "instance" of the driver, allocatingx
  97     local data structures for one device.  The device is registered
  98     with Card Services.
  99
 100     The dev_link structure is initialized, but we don't actually
 101     configure the card at this point -- we wait until we receive a
 102     card insertion event.
 103
 104 ======================================================================*/
 105
 106 static int __devinit elsa_cs_probe(struct pcmcia_device *link)
 107 {
 108     local_info_t *local;
 109
 110     dev_dbg(&link->dev, "elsa_cs_attach()\n");
 111
 112     /* Allocate space for private device-specific data */
 113     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 114     if (!local) return -ENOMEM;
 115
 116     local->p_dev = link;
 117     link->priv = local;
 118
 119     local->cardnr = -1;
 120
 121     /*
 122       General socket configuration defaults can go here.  In this
 123       client, we assume very little, and rely on the CIS for almost
 124       everything.  In most clients, many details (i.e., number, sizes,
 125       and attributes of IO windows) are fixed by the nature of the
 126       device, and can be hard-wired here.
 127     */
 128     link->resource[0]->end = 8;
 129     link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 130
 131     return elsa_cs_config(link);
 132 } /* elsa_cs_attach */
 133
 134 /*======================================================================
 135
 136     This deletes a driver "instance".  The device is de-registered
 137     with Card Services.  If it has been released, all local data
 138     structures are freed.  Otherwise, the structures will be freed
 139     when the device is released.
 140
 141 ======================================================================*/
 142
 143 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
 144 {
 145         local_info_t *info = link->priv;
 146
 147         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
 148
 149         info->busy = 1;
 150         elsa_cs_release(link);
 151
 152         kfree(info);
 153 } /* elsa_cs_detach */
 154
 155 /*======================================================================
 156
 157     elsa_cs_config() is scheduled to run after a CARD_INSERTION event
 158     is received, to configure the PCMCIA socket, and to make the
 159     device available to the system.
 160
 161 ======================================================================*/
 162
 163 static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
 164                                cistpl_cftable_entry_t *cf,
 165                                cistpl_cftable_entry_t *dflt,
 166                                unsigned int vcc,
 167                                void *priv_data)
 168 {
 169         int j;
 170
 171         p_dev->io_lines = 3;
 172
 173         if ((cf->io.nwin > 0) && cf->io.win[0].base) {
 174                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 175                 p_dev->resource[0]->start = cf->io.win[0].base;
 176                 if (!pcmcia_request_io(p_dev))
 177                         return 0;
 178         } else {
 179                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 180                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 181                         p_dev->resource[0]->start = j;
 182                         if (!pcmcia_request_io(p_dev))
 183                                 return 0;
 184                 }
 185         }
 186         return -ENODEV;
 187 }
 188
 189 static int __devinit elsa_cs_config(struct pcmcia_device *link)
 190 {
 191     local_info_t *dev;
 192     int i;
 193     IsdnCard_t icard;
 194
 195     dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
 196     dev = link->priv;
 197
 198     i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
 199     if (i != 0)
 200         goto failed;
 201
 202     if (!link->irq)
 203         goto failed;
 204
 205     i = pcmcia_enable_device(link);
 206     if (i != 0)
 207         goto failed;
 208
 209     /* Finally, report what we've done */
 210     dev_info(&link->dev, "index 0x%02x: ",
 211             link->config_index);
 212     printk(", irq %d", link->irq);
 213     if (link->resource[0])
 214         printk(" & %pR", link->resource[0]);
 215     if (link->resource[1])
 216         printk(" & %pR", link->resource[1]);
 217     printk("\n");
 218
 219     icard.para[0] = link->irq;
 220     icard.para[1] = link->resource[0]->start;
 221     icard.protocol = protocol;
 222     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 223
 224     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 225     if (i < 0) {
 226         printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
 227                 "PCMCIA %d with %pR\n", i, link->resource[0]);
 228         elsa_cs_release(link);
 229     } else
 230         ((local_info_t*)link->priv)->cardnr = i;
 231
 232     return 0;
 233 failed:
 234     elsa_cs_release(link);
 235     return -ENODEV;
 236 } /* elsa_cs_config */
 237
 238 /*======================================================================
 239
 240     After a card is removed, elsa_cs_release() will unregister the net
 241     device, and release the PCMCIA configuration.  If the device is
 242     still open, this will be postponed until it is closed.
 243
 244 ======================================================================*/
 245
 246 static void elsa_cs_release(struct pcmcia_device *link)
 247 {
 248     local_info_t *local = link->priv;
 249
 250     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 251
 252     if (local) {
 253         if (local->cardnr >= 0) {
 254             /* no unregister function with hisax */
 255             HiSax_closecard(local->cardnr);
 256         }
 257     }
 258
 259     pcmcia_disable_device(link);
 260 } /* elsa_cs_release */
 261
 262 static int elsa_suspend(struct pcmcia_device *link)
 263 {
 264         local_info_t *dev = link->priv;
 265
 266         dev->busy = 1;
 267
 268         return 0;
 269 }
 270
 271 static int elsa_resume(struct pcmcia_device *link)
 272 {
 273         local_info_t *dev = link->priv;
 274
 275         dev->busy = 0;
 276
 277         return 0;
 278 }
 279
 280 static struct pcmcia_device_id elsa_ids[] = {
 281         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 282         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 283         PCMCIA_DEVICE_NULL
 284 };
 285 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 286
 287 static struct pcmcia_driver elsa_cs_driver = {
 288         .owner          = THIS_MODULE,
 289         .drv            = {
 290                 .name   = "elsa_cs",
 291         },
 292         .probe          = elsa_cs_probe,
 293         .remove         = __devexit_p(elsa_cs_detach),
 294         .id_table       = elsa_ids,
 295         .suspend        = elsa_suspend,
 296         .resume         = elsa_resume,
 297 };
 298
 299 static int __init init_elsa_cs(void)
 300 {
 301         return pcmcia_register_driver(&elsa_cs_driver);
 302 }
 303
 304 static void __exit exit_elsa_cs(void)
 305 {
 306         pcmcia_unregister_driver(&elsa_cs_driver);
 307 }
 308
 309 module_init(init_elsa_cs);
 310 module_exit(exit_elsa_cs);