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     return elsa_cs_config(link);
 122 } /* elsa_cs_attach */
 123
 124 /*======================================================================
 125
 126     This deletes a driver "instance".  The device is de-registered
 127     with Card Services.  If it has been released, all local data
 128     structures are freed.  Otherwise, the structures will be freed
 129     when the device is released.
 130
 131 ======================================================================*/
 132
 133 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
 134 {
 135         local_info_t *info = link->priv;
 136
 137         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
 138
 139         info->busy = 1;
 140         elsa_cs_release(link);
 141
 142         kfree(info);
 143 } /* elsa_cs_detach */
 144
 145 /*======================================================================
 146
 147     elsa_cs_config() is scheduled to run after a CARD_INSERTION event
 148     is received, to configure the PCMCIA socket, and to make the
 149     device available to the system.
 150
 151 ======================================================================*/
 152
 153 static int elsa_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 154 {
 155         int j;
 156
 157         p_dev->io_lines = 3;
 158         p_dev->resource[0]->end = 8;
 159         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
 160         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 161
 162         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
 163                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 164                 if (!pcmcia_request_io(p_dev))
 165                         return 0;
 166         } else {
 167                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 168                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 169                         p_dev->resource[0]->start = j;
 170                         if (!pcmcia_request_io(p_dev))
 171                                 return 0;
 172                 }
 173         }
 174         return -ENODEV;
 175 }
 176
 177 static int __devinit elsa_cs_config(struct pcmcia_device *link)
 178 {
 179     local_info_t *dev;
 180     int i;
 181     IsdnCard_t icard;
 182
 183     dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
 184     dev = link->priv;
 185
 186     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 187
 188     i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
 189     if (i != 0)
 190         goto failed;
 191
 192     if (!link->irq)
 193         goto failed;
 194
 195     i = pcmcia_enable_device(link);
 196     if (i != 0)
 197         goto failed;
 198
 199     icard.para[0] = link->irq;
 200     icard.para[1] = link->resource[0]->start;
 201     icard.protocol = protocol;
 202     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 203
 204     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 205     if (i < 0) {
 206         printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
 207                 "PCMCIA %d with %pR\n", i, link->resource[0]);
 208         elsa_cs_release(link);
 209     } else
 210         ((local_info_t*)link->priv)->cardnr = i;
 211
 212     return 0;
 213 failed:
 214     elsa_cs_release(link);
 215     return -ENODEV;
 216 } /* elsa_cs_config */
 217
 218 /*======================================================================
 219
 220     After a card is removed, elsa_cs_release() will unregister the net
 221     device, and release the PCMCIA configuration.  If the device is
 222     still open, this will be postponed until it is closed.
 223
 224 ======================================================================*/
 225
 226 static void elsa_cs_release(struct pcmcia_device *link)
 227 {
 228     local_info_t *local = link->priv;
 229
 230     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 231
 232     if (local) {
 233         if (local->cardnr >= 0) {
 234             /* no unregister function with hisax */
 235             HiSax_closecard(local->cardnr);
 236         }
 237     }
 238
 239     pcmcia_disable_device(link);
 240 } /* elsa_cs_release */
 241
 242 static int elsa_suspend(struct pcmcia_device *link)
 243 {
 244         local_info_t *dev = link->priv;
 245
 246         dev->busy = 1;
 247
 248         return 0;
 249 }
 250
 251 static int elsa_resume(struct pcmcia_device *link)
 252 {
 253         local_info_t *dev = link->priv;
 254
 255         dev->busy = 0;
 256
 257         return 0;
 258 }
 259
 260 static struct pcmcia_device_id elsa_ids[] = {
 261         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 262         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 263         PCMCIA_DEVICE_NULL
 264 };
 265 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 266
 267 static struct pcmcia_driver elsa_cs_driver = {
 268         .owner          = THIS_MODULE,
 269         .name           = "elsa_cs",
 270         .probe          = elsa_cs_probe,
 271         .remove         = __devexit_p(elsa_cs_detach),
 272         .id_table       = elsa_ids,
 273         .suspend        = elsa_suspend,
 274         .resume         = elsa_resume,
 275 };
 276
 277 static int __init init_elsa_cs(void)
 278 {
 279         return pcmcia_register_driver(&elsa_cs_driver);
 280 }
 281
 282 static void __exit exit_elsa_cs(void)
 283 {
 284         pcmcia_unregister_driver(&elsa_cs_driver);
 285 }
 286
 287 module_init(init_elsa_cs);
 288 module_exit(exit_elsa_cs);