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_types.h>
  50 #include <pcmcia/cs.h>
  51 #include <pcmcia/cistpl.h>
  52 #include <pcmcia/cisreg.h>
  53 #include <pcmcia/ds.h>
  54 #include "hisax_cfg.h"
  55
  56 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
  57 MODULE_AUTHOR("Klaus Lichtenwalder");
  58 MODULE_LICENSE("Dual MPL/GPL");
  59
  60
  61 /*====================================================================*/
  62
  63 /* Parameters that can be set with 'insmod' */
  64
  65 static int protocol = 2;        /* EURO-ISDN Default */
  66 module_param(protocol, int, 0);
  67
  68 /*====================================================================*/
  69
  70 /*
  71    The event() function is this driver's Card Services event handler.
  72    It will be called by Card Services when an appropriate card status
  73    event is received.  The config() and release() entry points are
  74    used to configure or release a socket, in response to card insertion
  75    and ejection events.  They are invoked from the elsa_cs event
  76    handler.
  77 */
  78
  79 static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
  80 static void elsa_cs_release(struct pcmcia_device *link);
  81
  82 /*
  83    The attach() and detach() entry points are used to create and destroy
  84    "instances" of the driver, where each instance represents everything
  85    needed to manage one actual PCMCIA card.
  86 */
  87
  88 static void elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;
  89
  90 typedef struct local_info_t {
  91         struct pcmcia_device    *p_dev;
  92     int                 busy;
  93     int                 cardnr;
  94 } local_info_t;
  95
  96 /*======================================================================
  97
  98     elsa_cs_attach() creates an "instance" of the driver, allocatingx
  99     local data structures for one device.  The device is registered
 100     with Card Services.
 101
 102     The dev_link structure is initialized, but we don't actually
 103     configure the card at this point -- we wait until we receive a
 104     card insertion event.
 105
 106 ======================================================================*/
 107
 108 static int __devinit elsa_cs_probe(struct pcmcia_device *link)
 109 {
 110     local_info_t *local;
 111
 112     dev_dbg(&link->dev, "elsa_cs_attach()\n");
 113
 114     /* Allocate space for private device-specific data */
 115     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 116     if (!local) return -ENOMEM;
 117
 118     local->p_dev = link;
 119     link->priv = local;
 120
 121     local->cardnr = -1;
 122
 123     /*
 124       General socket configuration defaults can go here.  In this
 125       client, we assume very little, and rely on the CIS for almost
 126       everything.  In most clients, many details (i.e., number, sizes,
 127       and attributes of IO windows) are fixed by the nature of the
 128       device, and can be hard-wired here.
 129     */
 130     link->io.NumPorts1 = 8;
 131     link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 132     link->io.IOAddrLines = 3;
 133
 134     link->conf.Attributes = CONF_ENABLE_IRQ;
 135     link->conf.IntType = INT_MEMORY_AND_IO;
 136
 137     return elsa_cs_config(link);
 138 } /* elsa_cs_attach */
 139
 140 /*======================================================================
 141
 142     This deletes a driver "instance".  The device is de-registered
 143     with Card Services.  If it has been released, all local data
 144     structures are freed.  Otherwise, the structures will be freed
 145     when the device is released.
 146
 147 ======================================================================*/
 148
 149 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
 150 {
 151         local_info_t *info = link->priv;
 152
 153         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
 154
 155         info->busy = 1;
 156         elsa_cs_release(link);
 157
 158         kfree(info);
 159 } /* elsa_cs_detach */
 160
 161 /*======================================================================
 162
 163     elsa_cs_config() is scheduled to run after a CARD_INSERTION event
 164     is received, to configure the PCMCIA socket, and to make the
 165     device available to the system.
 166
 167 ======================================================================*/
 168
 169 static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
 170                                cistpl_cftable_entry_t *cf,
 171                                cistpl_cftable_entry_t *dflt,
 172                                unsigned int vcc,
 173                                void *priv_data)
 174 {
 175         int j;
 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->io.BasePort1 = cf->io.win[0].base;
 180                 if (!pcmcia_request_io(p_dev, &p_dev->io))
 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->io.BasePort1 = j;
 186                         if (!pcmcia_request_io(p_dev, &p_dev->io))
 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->io.NumPorts1)
 219         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 220                link->io.BasePort1+link->io.NumPorts1-1);
 221     if (link->io.NumPorts2)
 222         printk(" & 0x%04x-0x%04x", link->io.BasePort2,
 223                link->io.BasePort2+link->io.NumPorts2-1);
 224     printk("\n");
 225
 226     icard.para[0] = link->irq;
 227     icard.para[1] = link->io.BasePort1;
 228     icard.protocol = protocol;
 229     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 230
 231     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 232     if (i < 0) {
 233         printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
 234                 i, link->io.BasePort1);
 235         elsa_cs_release(link);
 236     } else
 237         ((local_info_t*)link->priv)->cardnr = i;
 238
 239     return 0;
 240 failed:
 241     elsa_cs_release(link);
 242     return -ENODEV;
 243 } /* elsa_cs_config */
 244
 245 /*======================================================================
 246
 247     After a card is removed, elsa_cs_release() will unregister the net
 248     device, and release the PCMCIA configuration.  If the device is
 249     still open, this will be postponed until it is closed.
 250
 251 ======================================================================*/
 252
 253 static void elsa_cs_release(struct pcmcia_device *link)
 254 {
 255     local_info_t *local = link->priv;
 256
 257     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 258
 259     if (local) {
 260         if (local->cardnr >= 0) {
 261             /* no unregister function with hisax */
 262             HiSax_closecard(local->cardnr);
 263         }
 264     }
 265
 266     pcmcia_disable_device(link);
 267 } /* elsa_cs_release */
 268
 269 static int elsa_suspend(struct pcmcia_device *link)
 270 {
 271         local_info_t *dev = link->priv;
 272
 273         dev->busy = 1;
 274
 275         return 0;
 276 }
 277
 278 static int elsa_resume(struct pcmcia_device *link)
 279 {
 280         local_info_t *dev = link->priv;
 281
 282         dev->busy = 0;
 283
 284         return 0;
 285 }
 286
 287 static struct pcmcia_device_id elsa_ids[] = {
 288         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 289         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 290         PCMCIA_DEVICE_NULL
 291 };
 292 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 293
 294 static struct pcmcia_driver elsa_cs_driver = {
 295         .owner          = THIS_MODULE,
 296         .drv            = {
 297                 .name   = "elsa_cs",
 298         },
 299         .probe          = elsa_cs_probe,
 300         .remove         = __devexit_p(elsa_cs_detach),
 301         .id_table       = elsa_ids,
 302         .suspend        = elsa_suspend,
 303         .resume         = elsa_resume,
 304 };
 305
 306 static int __init init_elsa_cs(void)
 307 {
 308         return pcmcia_register_driver(&elsa_cs_driver);
 309 }
 310
 311 static void __exit exit_elsa_cs(void)
 312 {
 313         pcmcia_unregister_driver(&elsa_cs_driver);
 314 }
 315
 316 module_init(init_elsa_cs);
 317 module_exit(exit_elsa_cs);