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
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/cisreg.h>
  50 #include <pcmcia/ds.h>
  51 #include "hisax_cfg.h"
  52
  53 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
  54 MODULE_AUTHOR("Klaus Lichtenwalder");
  55 MODULE_LICENSE("Dual MPL/GPL");
  56
  57
  58 /*====================================================================*/
  59
  60 /* Parameters that can be set with 'insmod' */
  61
  62 static int protocol = 2;        /* EURO-ISDN Default */
  63 module_param(protocol, int, 0);
  64
  65 static int elsa_cs_config(struct pcmcia_device *link);
  66 static void elsa_cs_release(struct pcmcia_device *link);
  67 static void elsa_cs_detach(struct pcmcia_device *p_dev);
  68
  69 typedef struct local_info_t {
  70         struct pcmcia_device    *p_dev;
  71         int                 busy;
  72         int                     cardnr;
  73 } local_info_t;
  74
  75 static int elsa_cs_probe(struct pcmcia_device *link)
  76 {
  77         local_info_t *local;
  78
  79         dev_dbg(&link->dev, "elsa_cs_attach()\n");
  80
  81         /* Allocate space for private device-specific data */
  82         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
  83         if (!local) return -ENOMEM;
  84
  85         local->p_dev = link;
  86         link->priv = local;
  87
  88         local->cardnr = -1;
  89
  90         return elsa_cs_config(link);
  91 } /* elsa_cs_attach */
  92
  93 static void elsa_cs_detach(struct pcmcia_device *link)
  94 {
  95         local_info_t *info = link->priv;
  96
  97         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
  98
  99         info->busy = 1;
 100         elsa_cs_release(link);
 101
 102         kfree(info);
 103 } /* elsa_cs_detach */
 104
 105 static int elsa_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 106 {
 107         int j;
 108
 109         p_dev->io_lines = 3;
 110         p_dev->resource[0]->end = 8;
 111         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
 112         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 113
 114         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
 115                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 116                 if (!pcmcia_request_io(p_dev))
 117                         return 0;
 118         } else {
 119                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 120                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 121                         p_dev->resource[0]->start = j;
 122                         if (!pcmcia_request_io(p_dev))
 123                                 return 0;
 124                 }
 125         }
 126         return -ENODEV;
 127 }
 128
 129 static int elsa_cs_config(struct pcmcia_device *link)
 130 {
 131         int i;
 132         IsdnCard_t icard;
 133
 134         dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
 135
 136         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 137
 138         i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
 139         if (i != 0)
 140                 goto failed;
 141
 142         if (!link->irq)
 143                 goto failed;
 144
 145         i = pcmcia_enable_device(link);
 146         if (i != 0)
 147                 goto failed;
 148
 149         icard.para[0] = link->irq;
 150         icard.para[1] = link->resource[0]->start;
 151         icard.protocol = protocol;
 152         icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
 153
 154         i = hisax_init_pcmcia(link, &(((local_info_t *)link->priv)->busy), &icard);
 155         if (i < 0) {
 156                 printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
 157                        "PCMCIA %d with %pR\n", i, link->resource[0]);
 158                 elsa_cs_release(link);
 159         } else
 160                 ((local_info_t *)link->priv)->cardnr = i;
 161
 162         return 0;
 163 failed:
 164         elsa_cs_release(link);
 165         return -ENODEV;
 166 } /* elsa_cs_config */
 167
 168 static void elsa_cs_release(struct pcmcia_device *link)
 169 {
 170         local_info_t *local = link->priv;
 171
 172         dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
 173
 174         if (local) {
 175                 if (local->cardnr >= 0) {
 176                         /* no unregister function with hisax */
 177                         HiSax_closecard(local->cardnr);
 178                 }
 179         }
 180
 181         pcmcia_disable_device(link);
 182 } /* elsa_cs_release */
 183
 184 static int elsa_suspend(struct pcmcia_device *link)
 185 {
 186         local_info_t *dev = link->priv;
 187
 188         dev->busy = 1;
 189
 190         return 0;
 191 }
 192
 193 static int elsa_resume(struct pcmcia_device *link)
 194 {
 195         local_info_t *dev = link->priv;
 196
 197         dev->busy = 0;
 198
 199         return 0;
 200 }
 201
 202 static const struct pcmcia_device_id elsa_ids[] = {
 203         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 204         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 205         PCMCIA_DEVICE_NULL
 206 };
 207 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
 208
 209 static struct pcmcia_driver elsa_cs_driver = {
 210         .owner          = THIS_MODULE,
 211         .name           = "elsa_cs",
 212         .probe          = elsa_cs_probe,
 213         .remove         = elsa_cs_detach,
 214         .id_table       = elsa_ids,
 215         .suspend        = elsa_suspend,
 216         .resume         = elsa_resume,
 217 };
 218 module_pcmcia_driver(elsa_cs_driver);