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     local_info_t *dev;
 115     int i;
 116     IsdnCard_t icard;
 117
 118     dev_dbg(&link->dev, "teles_config(0x%p)\n", link);
 119     dev = link->priv;
 120
 121     i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
 122     if (i != 0)
 123         goto cs_failed;
 124
 125     if (!link->irq)
 126         goto cs_failed;
 127
 128     i = pcmcia_enable_device(link);
 129     if (i != 0)
 130       goto cs_failed;
 131
 132     icard.para[0] = link->irq;
 133     icard.para[1] = link->resource[0]->start;
 134     icard.protocol = protocol;
 135     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 136
 137     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 138     if (i < 0) {
 139         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 140                         i, (unsigned int) link->resource[0]->start);
 141         teles_cs_release(link);
 142         return -ENODEV;
 143     }
 144
 145     ((local_info_t*)link->priv)->cardnr = i;
 146     return 0;
 147
 148 cs_failed:
 149     teles_cs_release(link);
 150     return -ENODEV;
 151 } /* teles_cs_config */
 152
 153 static void teles_cs_release(struct pcmcia_device *link)
 154 {
 155     local_info_t *local = link->priv;
 156
 157     dev_dbg(&link->dev, "teles_cs_release(0x%p)\n", link);
 158
 159     if (local) {
 160         if (local->cardnr >= 0) {
 161             /* no unregister function with hisax */
 162             HiSax_closecard(local->cardnr);
 163         }
 164     }
 165
 166     pcmcia_disable_device(link);
 167 } /* teles_cs_release */
 168
 169 static int teles_suspend(struct pcmcia_device *link)
 170 {
 171         local_info_t *dev = link->priv;
 172
 173         dev->busy = 1;
 174
 175         return 0;
 176 }
 177
 178 static int teles_resume(struct pcmcia_device *link)
 179 {
 180         local_info_t *dev = link->priv;
 181
 182         dev->busy = 0;
 183
 184         return 0;
 185 }
 186
 187
 188 static const struct pcmcia_device_id teles_ids[] = {
 189         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 190         PCMCIA_DEVICE_NULL,
 191 };
 192 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 193
 194 static struct pcmcia_driver teles_cs_driver = {
 195         .owner          = THIS_MODULE,
 196         .name           = "teles_cs",
 197         .probe          = teles_probe,
 198         .remove         = __devexit_p(teles_detach),
 199         .id_table       = teles_ids,
 200         .suspend        = teles_suspend,
 201         .resume         = teles_resume,
 202 };
 203
 204 static int __init init_teles_cs(void)
 205 {
 206         return pcmcia_register_driver(&teles_cs_driver);
 207 }
 208
 209 static void __exit exit_teles_cs(void)
 210 {
 211         pcmcia_unregister_driver(&teles_cs_driver);
 212 }
 213
 214 module_init(init_teles_cs);
 215 module_exit(exit_teles_cs);