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/cs.h>
  50 #include <pcmcia/cistpl.h>
  51 #include <pcmcia/cisreg.h>
  52 #include <pcmcia/ds.h>
  53 #include "hisax_cfg.h"
  54
  55 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
  56 MODULE_AUTHOR("Klaus Lichtenwalder");
  57 MODULE_LICENSE("Dual MPL/GPL");
  58
  59
  60 /*====================================================================*/
  61
  62 /* Parameters that can be set with 'insmod' */
  63
  64 static int protocol = 2;        /* EURO-ISDN Default */
  65 module_param(protocol, int, 0);
  66
  67 /*====================================================================*/
  68
  69 /*
  70    The event() function is this driver's Card Services event handler.
  71    It will be called by Card Services when an appropriate card status
  72    event is received.  The config() and release() entry points are
  73    used to configure or release a socket, in response to card insertion
  74    and ejection events.  They are invoked from the elsa_cs event
  75    handler.
  76 */
  77
  78 static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
  79 static void elsa_cs_release(struct pcmcia_device *link);
  80
  81 /*
  82    The attach() and detach() entry points are used to create and destroy
  83    "instances" of the driver, where each instance represents everything
  84    needed to manage one actual PCMCIA card.
  85 */
  86
  87 static void elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;
  88
  89 typedef struct local_info_t {
  90         struct pcmcia_device    *p_dev;
  91     int                 busy;
  92     int                 cardnr;
  93 } local_info_t;
  94
  95 /*======================================================================
  96
  97     elsa_cs_attach() creates an "instance" of the driver, allocatingx
  98     local data structures for one device.  The device is registered
  99     with Card Services.
 100
 101     The dev_link structure is initialized, but we don't actually
 102     configure the card at this point -- we wait until we receive a
 103     card insertion event.
 104
 105 ======================================================================*/
 106
 107 static int __devinit elsa_cs_probe(struct pcmcia_device *link)
 108 {
 109     local_info_t *local;
 110
 111     dev_dbg(&link->dev, "elsa_cs_attach()\n");
 112
 113     /* Allocate space for private device-specific data */
 114     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 115     if (!local) return -ENOMEM;
 116
 117     local->p_dev = link;
 118     link->priv = local;
 119
 120     local->cardnr = -1;
 121
 122     /*
 123       General socket configuration defaults can go here.  In this
 124       client, we assume very little, and rely on the CIS for almost
 125       everything.  In most clients, many details (i.e., number, sizes,
 126       and attributes of IO windows) are fixed by the nature of the
 127       device, and can be hard-wired here.
 128     */
 129     link->resource[0]->end = 8;
 130     link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 131
 132     link->conf.Attributes = CONF_ENABLE_IRQ;
 133     link->conf.IntType = INT_MEMORY_AND_IO;
 134
 135     return elsa_cs_config(link);
 136 } /* elsa_cs_attach */
 137
 138 /*======================================================================
 139
 140     This deletes a driver "instance".  The device is de-registered
 141     with Card Services.  If it has been released, all local data
 142     structures are freed.  Otherwise, the structures will be freed
 143     when the device is released.
 144
 145 ======================================================================*/
 146
 147 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
 148 {
 149         local_info_t *info = link->priv;
 150
 151         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
 152
 153         info->busy = 1;
 154         elsa_cs_release(link);
 155
 156         kfree(info);
 157 } /* elsa_cs_detach */
 158
 159 /*======================================================================
 160
 161     elsa_cs_config() is scheduled to run after a CARD_INSERTION event
 162     is received, to configure the PCMCIA socket, and to make the
 163     device available to the system.
 164
 165 ======================================================================*/
 166
 167 static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
 168                                cistpl_cftable_entry_t *cf,
 169                                cistpl_cftable_entry_t *dflt,
 170                                unsigned int vcc,
 171                                void *priv_data)
 172 {
 173         int j;
 174
 175         p_dev->io_lines = 3;
 176
 177         if ((cf->io.nwin > 0) && cf->io.win[0].base) {
 178                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 179                 p_dev->resource[0]->start = cf->io.win[0].base;
 180                 if (!pcmcia_request_io(p_dev))
 181                         return 0;
 182         } else {
 183                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 184                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 185                         p_dev->resource[0]->start = j;
 186                         if (!pcmcia_request_io(p_dev))
 187                                 return 0;
 188                 }
 189         }
 190         return -ENODEV;
 191 }
 192
 193 static int __devinit elsa_cs_config(struct pcmcia_device *link)
 194 {
 195     local_info_t *dev;
 196     int i;
 197     IsdnCard_t icard;
 198
 199     dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
 200     dev = link->priv;
 201
 202     i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
 203     if (i != 0)
 204         goto failed;
 205
 206     if (!link->irq)
 207         goto failed;
 208
 209     i = pcmcia_request_configuration(link, &link->conf);
 210     if (i != 0)
 211         goto failed;
 212
 213     /* Finally, report what we've done */
 214     dev_info(&link->dev, "index 0x%02x: ",
 215             link->conf.ConfigIndex);
 216     if (link->conf.Attributes & CONF_ENABLE_IRQ)
 217         printk(", irq %d", link->irq);
 218     if (link->resource[0])
 219         printk(" & %pR", link->resource[0]);
 220     if (link->resource[1])
 221         printk(" & %pR", link->resource[1]);
 222     printk("\n");
 223
 224     icard.para[0] = link->irq;
 225     icard.para[1] = link->resource[0]->start;
 226     icard.protocol = protocol;
 227     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 228
 229     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 230     if (i < 0) {
 231         printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
 232                 "PCMCIA %d with %pR\n", i, link->resource[0]);
 233         elsa_cs_release(link);
 234     } else
 235         ((local_info_t*)link->priv)->cardnr = i;
 236
 237     return 0;
 238 failed:
 239     elsa_cs_release(link);
 240     return -ENODEV;
 241 } /* elsa_cs_config */
 242
 243 /*======================================================================
 244
 245     After a card is removed, elsa_cs_release() will unregister the net
 246     device, and release the PCMCIA configuration.  If the device is
 247     still open, this will be postponed until it is closed.
 248
 249 ======================================================================*/
 250
 251 static void elsa_cs_release(struct pcmcia_device *link)
 252 {
 253     local_info_t *local = link->priv;
 254
 255     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 256
 257     if (local) {
 258         if (local->cardnr >= 0) {
 259             /* no unregister function with hisax */
 260             HiSax_closecard(local->cardnr);
 261         }
 262     }
 263
 264     pcmcia_disable_device(link);
 265 } /* elsa_cs_release */
 266
 267 static int elsa_suspend(struct pcmcia_device *link)
 268 {
 269         local_info_t *dev = link->priv;
 270
 271         dev->busy = 1;
 272
 273         return 0;
 274 }
 275
 276 static int elsa_resume(struct pcmcia_device *link)
 277 {
 278         local_info_t *dev = link->priv;
 279
 280         dev->busy = 0;
 281
 282         return 0;
 283 }
 284
 285 static struct pcmcia_device_id elsa_ids[] = {
 286         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 287         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 288         PCMCIA_DEVICE_NULL
 289 };
 290 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 291
 292 static struct pcmcia_driver elsa_cs_driver = {
 293         .owner          = THIS_MODULE,
 294         .drv            = {
 295                 .name   = "elsa_cs",
 296         },
 297         .probe          = elsa_cs_probe,
 298         .remove         = __devexit_p(elsa_cs_detach),
 299         .id_table       = elsa_ids,
 300         .suspend        = elsa_suspend,
 301         .resume         = elsa_resume,
 302 };
 303
 304 static int __init init_elsa_cs(void)
 305 {
 306         return pcmcia_register_driver(&elsa_cs_driver);
 307 }
 308
 309 static void __exit exit_elsa_cs(void)
 310 {
 311         pcmcia_unregister_driver(&elsa_cs_driver);
 312 }
 313
 314 module_init(init_elsa_cs);
 315 module_exit(exit_elsa_cs);