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 static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
  67 static void elsa_cs_release(struct pcmcia_device *link);
  68 static void elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;
  69
  70 typedef struct local_info_t {
  71         struct pcmcia_device    *p_dev;
  72     int                 busy;
  73     int                 cardnr;
  74 } local_info_t;
  75
  76 static int __devinit elsa_cs_probe(struct pcmcia_device *link)
  77 {
  78     local_info_t *local;
  79
  80     dev_dbg(&link->dev, "elsa_cs_attach()\n");
  81
  82     /* Allocate space for private device-specific data */
  83     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
  84     if (!local) return -ENOMEM;
  85
  86     local->p_dev = link;
  87     link->priv = local;
  88
  89     local->cardnr = -1;
  90
  91     return elsa_cs_config(link);
  92 } /* elsa_cs_attach */
  93
  94 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
  95 {
  96         local_info_t *info = link->priv;
  97
  98         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
  99
 100         info->busy = 1;
 101         elsa_cs_release(link);
 102
 103         kfree(info);
 104 } /* elsa_cs_detach */
 105
 106 static int elsa_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 107 {
 108         int j;
 109
 110         p_dev->io_lines = 3;
 111         p_dev->resource[0]->end = 8;
 112         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
 113         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 114
 115         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
 116                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 117                 if (!pcmcia_request_io(p_dev))
 118                         return 0;
 119         } else {
 120                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 121                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 122                         p_dev->resource[0]->start = j;
 123                         if (!pcmcia_request_io(p_dev))
 124                                 return 0;
 125                 }
 126         }
 127         return -ENODEV;
 128 }
 129
 130 static int __devinit elsa_cs_config(struct pcmcia_device *link)
 131 {
 132     local_info_t *dev;
 133     int i;
 134     IsdnCard_t icard;
 135
 136     dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
 137     dev = link->priv;
 138
 139     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 140
 141     i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
 142     if (i != 0)
 143         goto failed;
 144
 145     if (!link->irq)
 146         goto failed;
 147
 148     i = pcmcia_enable_device(link);
 149     if (i != 0)
 150         goto failed;
 151
 152     icard.para[0] = link->irq;
 153     icard.para[1] = link->resource[0]->start;
 154     icard.protocol = protocol;
 155     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 156
 157     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 158     if (i < 0) {
 159         printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
 160                 "PCMCIA %d with %pR\n", i, link->resource[0]);
 161         elsa_cs_release(link);
 162     } else
 163         ((local_info_t*)link->priv)->cardnr = i;
 164
 165     return 0;
 166 failed:
 167     elsa_cs_release(link);
 168     return -ENODEV;
 169 } /* elsa_cs_config */
 170
 171 static void elsa_cs_release(struct pcmcia_device *link)
 172 {
 173     local_info_t *local = link->priv;
 174
 175     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 176
 177     if (local) {
 178         if (local->cardnr >= 0) {
 179             /* no unregister function with hisax */
 180             HiSax_closecard(local->cardnr);
 181         }
 182     }
 183
 184     pcmcia_disable_device(link);
 185 } /* elsa_cs_release */
 186
 187 static int elsa_suspend(struct pcmcia_device *link)
 188 {
 189         local_info_t *dev = link->priv;
 190
 191         dev->busy = 1;
 192
 193         return 0;
 194 }
 195
 196 static int elsa_resume(struct pcmcia_device *link)
 197 {
 198         local_info_t *dev = link->priv;
 199
 200         dev->busy = 0;
 201
 202         return 0;
 203 }
 204
 205 static const struct pcmcia_device_id elsa_ids[] = {
 206         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 207         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 208         PCMCIA_DEVICE_NULL
 209 };
 210 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 211
 212 static struct pcmcia_driver elsa_cs_driver = {
 213         .owner          = THIS_MODULE,
 214         .name           = "elsa_cs",
 215         .probe          = elsa_cs_probe,
 216         .remove         = __devexit_p(elsa_cs_detach),
 217         .id_table       = elsa_ids,
 218         .suspend        = elsa_suspend,
 219         .resume         = elsa_resume,
 220 };
 221
 222 static int __init init_elsa_cs(void)
 223 {
 224         return pcmcia_register_driver(&elsa_cs_driver);
 225 }
 226
 227 static void __exit exit_elsa_cs(void)
 228 {
 229         pcmcia_unregister_driver(&elsa_cs_driver);
 230 }
 231
 232 module_init(init_elsa_cs);
 233 module_exit(exit_elsa_cs);