drivers/isdn/hisax/teles_cs.c

   1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
   2 /*======================================================================
   3
   4     A teles S0 PCMCIA client driver
   5
   6     Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
   7     Written by Christof Petig, christof.petig@wtal.de
   8
   9     Also inspired by ELSA PCMCIA driver
  10     by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
  11
  12     Extensions to new hisax_pcmcia by Karsten Keil
  13
  14     minor changes to be compatible with kernel 2.4.x
  15     by Jan.Schubert@GMX.li
  16
  17 ======================================================================*/
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.h>
  25 #include <linux/timer.h>
  26 #include <linux/ioport.h>
  27 #include <asm/io.h>
  28 #include <asm/system.h>
  29
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/cisreg.h>
  32 #include <pcmcia/ds.h>
  33 #include "hisax_cfg.h"
  34
  35 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
  36 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
  37 MODULE_LICENSE("GPL");
  38
  39
  40 /*====================================================================*/
  41
  42 /* Parameters that can be set with 'insmod' */
  43
  44 static int protocol = 2;        /* EURO-ISDN Default */
  45 module_param(protocol, int, 0);
  46
  47 static int teles_cs_config(struct pcmcia_device *link) __devinit ;
  48 static void teles_cs_release(struct pcmcia_device *link);
  49 static void teles_detach(struct pcmcia_device *p_dev) __devexit ;
  50
  51 typedef struct local_info_t {
  52         struct pcmcia_device    *p_dev;
  53     int                 busy;
  54     int                 cardnr;
  55 } local_info_t;
  56
  57 static int __devinit teles_probe(struct pcmcia_device *link)
  58 {
  59     local_info_t *local;
  60
  61     dev_dbg(&link->dev, "teles_attach()\n");
  62
  63     /* Allocate space for private device-specific data */
  64     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
  65     if (!local) return -ENOMEM;
  66     local->cardnr = -1;
  67
  68     local->p_dev = link;
  69     link->priv = local;
  70
  71     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
  72
  73     return teles_cs_config(link);
  74 } /* teles_attach */
  75
  76 static void __devexit teles_detach(struct pcmcia_device *link)
  77 {
  78         local_info_t *info = link->priv;
  79
  80         dev_dbg(&link->dev, "teles_detach(0x%p)\n", link);
  81
  82         info->busy = 1;
  83         teles_cs_release(link);
  84
  85         kfree(info);
  86 } /* teles_detach */
  87
  88 static int teles_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
  89 {
  90         int j;
  91
  92         p_dev->io_lines = 5;
  93         p_dev->resource[0]->end = 96;
  94         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
  95         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  96
  97         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
  98                 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
  99                 if (!pcmcia_request_io(p_dev))
 100                         return 0;
 101         } else {
 102                 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
 103                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 104                         p_dev->resource[0]->start = j;
 105                         if (!pcmcia_request_io(p_dev))
 106                                 return 0;
 107                 }
 108         }
 109         return -ENODEV;
 110 }
 111
 112 static int __devinit teles_cs_config(struct pcmcia_device *link)
 113 {
 114     int i;
 115     IsdnCard_t icard;
 116
 117     dev_dbg(&link->dev, "teles_config(0x%p)\n", link);
 118
 119     i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
 120     if (i != 0)
 121         goto cs_failed;
 122
 123     if (!link->irq)
 124         goto cs_failed;
 125
 126     i = pcmcia_enable_device(link);
 127     if (i != 0)
 128       goto cs_failed;
 129
 130     icard.para[0] = link->irq;
 131     icard.para[1] = link->resource[0]->start;
 132     icard.protocol = protocol;
 133     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 134
 135     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 136     if (i < 0) {
 137         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 138                         i, (unsigned int) link->resource[0]->start);
 139         teles_cs_release(link);
 140         return -ENODEV;
 141     }
 142
 143     ((local_info_t*)link->priv)->cardnr = i;
 144     return 0;
 145
 146 cs_failed:
 147     teles_cs_release(link);
 148     return -ENODEV;
 149 } /* teles_cs_config */
 150
 151 static void teles_cs_release(struct pcmcia_device *link)
 152 {
 153     local_info_t *local = link->priv;
 154
 155     dev_dbg(&link->dev, "teles_cs_release(0x%p)\n", link);
 156
 157     if (local) {
 158         if (local->cardnr >= 0) {
 159             /* no unregister function with hisax */
 160             HiSax_closecard(local->cardnr);
 161         }
 162     }
 163
 164     pcmcia_disable_device(link);
 165 } /* teles_cs_release */
 166
 167 static int teles_suspend(struct pcmcia_device *link)
 168 {
 169         local_info_t *dev = link->priv;
 170
 171         dev->busy = 1;
 172
 173         return 0;
 174 }
 175
 176 static int teles_resume(struct pcmcia_device *link)
 177 {
 178         local_info_t *dev = link->priv;
 179
 180         dev->busy = 0;
 181
 182         return 0;
 183 }
 184
 185
 186 static const struct pcmcia_device_id teles_ids[] = {
 187         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 188         PCMCIA_DEVICE_NULL,
 189 };
 190 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 191
 192 static struct pcmcia_driver teles_cs_driver = {
 193         .owner          = THIS_MODULE,
 194         .name           = "teles_cs",
 195         .probe          = teles_probe,
 196         .remove         = __devexit_p(teles_detach),
 197         .id_table       = teles_ids,
 198         .suspend        = teles_suspend,
 199         .resume         = teles_resume,
 200 };
 201
 202 static int __init init_teles_cs(void)
 203 {
 204         return pcmcia_register_driver(&teles_cs_driver);
 205 }
 206
 207 static void __exit exit_teles_cs(void)
 208 {
 209         pcmcia_unregister_driver(&teles_cs_driver);
 210 }
 211
 212 module_init(init_teles_cs);
 213 module_exit(exit_teles_cs);