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     Extentions 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 /*====================================================================*/
  48
  49 /*
  50    The event() function is this driver's Card Services event handler.
  51    It will be called by Card Services when an appropriate card status
  52    event is received.  The config() and release() entry points are
  53    used to configure or release a socket, in response to card insertion
  54    and ejection events.  They are invoked from the teles_cs event
  55    handler.
  56 */
  57
  58 static int teles_cs_config(struct pcmcia_device *link) __devinit ;
  59 static void teles_cs_release(struct pcmcia_device *link);
  60
  61 /*
  62    The attach() and detach() entry points are used to create and destroy
  63    "instances" of the driver, where each instance represents everything
  64    needed to manage one actual PCMCIA card.
  65 */
  66
  67 static void teles_detach(struct pcmcia_device *p_dev) __devexit ;
  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 /*======================================================================
  76
  77     teles_attach() creates an "instance" of the driver, allocatingx
  78     local data structures for one device.  The device is registered
  79     with Card Services.
  80
  81     The dev_link structure is initialized, but we don't actually
  82     configure the card at this point -- we wait until we receive a
  83     card insertion event.
  84
  85 ======================================================================*/
  86
  87 static int __devinit teles_probe(struct pcmcia_device *link)
  88 {
  89     local_info_t *local;
  90
  91     dev_dbg(&link->dev, "teles_attach()\n");
  92
  93     /* Allocate space for private device-specific data */
  94     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
  95     if (!local) return -ENOMEM;
  96     local->cardnr = -1;
  97
  98     local->p_dev = link;
  99     link->priv = local;
 100
 101     /*
 102       General socket configuration defaults can go here.  In this
 103       client, we assume very little, and rely on the CIS for almost
 104       everything.  In most clients, many details (i.e., number, sizes,
 105       and attributes of IO windows) are fixed by the nature of the
 106       device, and can be hard-wired here.
 107     */
 108     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 109
 110     return teles_cs_config(link);
 111 } /* teles_attach */
 112
 113 /*======================================================================
 114
 115     This deletes a driver "instance".  The device is de-registered
 116     with Card Services.  If it has been released, all local data
 117     structures are freed.  Otherwise, the structures will be freed
 118     when the device is released.
 119
 120 ======================================================================*/
 121
 122 static void __devexit teles_detach(struct pcmcia_device *link)
 123 {
 124         local_info_t *info = link->priv;
 125
 126         dev_dbg(&link->dev, "teles_detach(0x%p)\n", link);
 127
 128         info->busy = 1;
 129         teles_cs_release(link);
 130
 131         kfree(info);
 132 } /* teles_detach */
 133
 134 /*======================================================================
 135
 136     teles_cs_config() is scheduled to run after a CARD_INSERTION event
 137     is received, to configure the PCMCIA socket, and to make the
 138     device available to the system.
 139
 140 ======================================================================*/
 141
 142 static int teles_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 143 {
 144         int j;
 145
 146         p_dev->io_lines = 5;
 147         p_dev->resource[0]->end = 96;
 148         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
 149         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 150
 151         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
 152                 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
 153                 if (!pcmcia_request_io(p_dev))
 154                         return 0;
 155         } else {
 156                 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
 157                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 158                         p_dev->resource[0]->start = j;
 159                         if (!pcmcia_request_io(p_dev))
 160                                 return 0;
 161                 }
 162         }
 163         return -ENODEV;
 164 }
 165
 166 static int __devinit teles_cs_config(struct pcmcia_device *link)
 167 {
 168     local_info_t *dev;
 169     int i;
 170     IsdnCard_t icard;
 171
 172     dev_dbg(&link->dev, "teles_config(0x%p)\n", link);
 173     dev = link->priv;
 174
 175     i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
 176     if (i != 0)
 177         goto cs_failed;
 178
 179     if (!link->irq)
 180         goto cs_failed;
 181
 182     i = pcmcia_enable_device(link);
 183     if (i != 0)
 184       goto cs_failed;
 185
 186     icard.para[0] = link->irq;
 187     icard.para[1] = link->resource[0]->start;
 188     icard.protocol = protocol;
 189     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 190
 191     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 192     if (i < 0) {
 193         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 194                         i, (unsigned int) link->resource[0]->start);
 195         teles_cs_release(link);
 196         return -ENODEV;
 197     }
 198
 199     ((local_info_t*)link->priv)->cardnr = i;
 200     return 0;
 201
 202 cs_failed:
 203     teles_cs_release(link);
 204     return -ENODEV;
 205 } /* teles_cs_config */
 206
 207 /*======================================================================
 208
 209     After a card is removed, teles_cs_release() will unregister the net
 210     device, and release the PCMCIA configuration.  If the device is
 211     still open, this will be postponed until it is closed.
 212
 213 ======================================================================*/
 214
 215 static void teles_cs_release(struct pcmcia_device *link)
 216 {
 217     local_info_t *local = link->priv;
 218
 219     dev_dbg(&link->dev, "teles_cs_release(0x%p)\n", link);
 220
 221     if (local) {
 222         if (local->cardnr >= 0) {
 223             /* no unregister function with hisax */
 224             HiSax_closecard(local->cardnr);
 225         }
 226     }
 227
 228     pcmcia_disable_device(link);
 229 } /* teles_cs_release */
 230
 231 static int teles_suspend(struct pcmcia_device *link)
 232 {
 233         local_info_t *dev = link->priv;
 234
 235         dev->busy = 1;
 236
 237         return 0;
 238 }
 239
 240 static int teles_resume(struct pcmcia_device *link)
 241 {
 242         local_info_t *dev = link->priv;
 243
 244         dev->busy = 0;
 245
 246         return 0;
 247 }
 248
 249
 250 static struct pcmcia_device_id teles_ids[] = {
 251         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 252         PCMCIA_DEVICE_NULL,
 253 };
 254 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 255
 256 static struct pcmcia_driver teles_cs_driver = {
 257         .owner          = THIS_MODULE,
 258         .name           = "teles_cs",
 259         .probe          = teles_probe,
 260         .remove         = __devexit_p(teles_detach),
 261         .id_table       = teles_ids,
 262         .suspend        = teles_suspend,
 263         .resume         = teles_resume,
 264 };
 265
 266 static int __init init_teles_cs(void)
 267 {
 268         return pcmcia_register_driver(&teles_cs_driver);
 269 }
 270
 271 static void __exit exit_teles_cs(void)
 272 {
 273         pcmcia_unregister_driver(&teles_cs_driver);
 274 }
 275
 276 module_init(init_teles_cs);
 277 module_exit(exit_teles_cs);