release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/isdn/hardware/avm/avm_cs.c

   1 /* $Id: avm_cs.c,v 1.4.6.3 2001/09/23 22:24:33 Exp $
   2  *
   3  * A PCMCIA client driver for AVM B1/M1/M2
   4  *
   5  * Copyright 1999 by Carsten Paeth <calle@calle.de>
   6  *
   7  * This software may be used and distributed according to the terms
   8  * of the GNU General Public License, incorporated herein by reference.
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/ptrace.h>
  16 #include <linux/string.h>
  17 #include <linux/tty.h>
  18 #include <linux/serial.h>
  19 #include <linux/major.h>
  20 #include <asm/io.h>
  21 #include <asm/system.h>
  22
  23 #include <pcmcia/cs.h>
  24 #include <pcmcia/cistpl.h>
  25 #include <pcmcia/ciscode.h>
  26 #include <pcmcia/ds.h>
  27 #include <pcmcia/cisreg.h>
  28
  29 #include <linux/skbuff.h>
  30 #include <linux/capi.h>
  31 #include <linux/b1lli.h>
  32 #include <linux/b1pcmcia.h>
  33
  34 /*====================================================================*/
  35
  36 MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
  37 MODULE_AUTHOR("Carsten Paeth");
  38 MODULE_LICENSE("GPL");
  39
  40 /*====================================================================*/
  41
  42 /*
  43    The event() function is this driver's Card Services event handler.
  44    It will be called by Card Services when an appropriate card status
  45    event is received.  The config() and release() entry points are
  46    used to configure or release a socket, in response to card insertion
  47    and ejection events.  They are invoked from the skeleton event
  48    handler.
  49 */
  50
  51 static int avmcs_config(struct pcmcia_device *link);
  52 static void avmcs_release(struct pcmcia_device *link);
  53
  54 /*
  55    The attach() and detach() entry points are used to create and destroy
  56    "instances" of the driver, where each instance represents everything
  57    needed to manage one actual PCMCIA card.
  58 */
  59
  60 static void avmcs_detach(struct pcmcia_device *p_dev);
  61
  62 /*======================================================================
  63
  64     avmcs_attach() creates an "instance" of the driver, allocating
  65     local data structures for one device.  The device is registered
  66     with Card Services.
  67
  68     The dev_link structure is initialized, but we don't actually
  69     configure the card at this point -- we wait until we receive a
  70     card insertion event.
  71
  72 ======================================================================*/
  73
  74 static int avmcs_probe(struct pcmcia_device *p_dev)
  75 {
  76
  77     /* The io structure describes IO port mapping */
  78     p_dev->resource[0]->end = 16;
  79     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
  80
  81     /* General socket configuration */
  82     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
  83     p_dev->conf.IntType = INT_MEMORY_AND_IO;
  84     p_dev->conf.ConfigIndex = 1;
  85     p_dev->conf.Present = PRESENT_OPTION;
  86
  87     return avmcs_config(p_dev);
  88 } /* avmcs_attach */
  89
  90 /*======================================================================
  91
  92     This deletes a driver "instance".  The device is de-registered
  93     with Card Services.  If it has been released, all local data
  94     structures are freed.  Otherwise, the structures will be freed
  95     when the device is released.
  96
  97 ======================================================================*/
  98
  99 static void avmcs_detach(struct pcmcia_device *link)
 100 {
 101         avmcs_release(link);
 102 } /* avmcs_detach */
 103
 104 /*======================================================================
 105
 106     avmcs_config() is scheduled to run after a CARD_INSERTION event
 107     is received, to configure the PCMCIA socket, and to make the
 108     ethernet device available to the system.
 109
 110 ======================================================================*/
 111
 112 static int avmcs_configcheck(struct pcmcia_device *p_dev,
 113                              cistpl_cftable_entry_t *cf,
 114                              cistpl_cftable_entry_t *dflt,
 115                              unsigned int vcc,
 116                              void *priv_data)
 117 {
 118         if (cf->io.nwin <= 0)
 119                 return -ENODEV;
 120
 121         p_dev->resource[0]->start = cf->io.win[0].base;
 122         p_dev->resource[0]->end = cf->io.win[0].len;
 123         return pcmcia_request_io(p_dev);
 124 }
 125
 126 static int avmcs_config(struct pcmcia_device *link)
 127 {
 128     int i = -1;
 129     char devname[128];
 130     int cardtype;
 131     int (*addcard)(unsigned int port, unsigned irq);
 132
 133     devname[0] = 0;
 134     if (link->prod_id[1])
 135             strlcpy(devname, link->prod_id[1], sizeof(devname));
 136
 137     /*
 138      * find IO port
 139      */
 140     if (pcmcia_loop_config(link, avmcs_configcheck, NULL))
 141             return -ENODEV;
 142
 143     do {
 144         if (!link->irq) {
 145             /* undo */
 146             pcmcia_disable_device(link);
 147             break;
 148         }
 149
 150         /*
 151          * configure the PCMCIA socket
 152           */
 153         i = pcmcia_request_configuration(link, &link->conf);
 154         if (i != 0) {
 155             pcmcia_disable_device(link);
 156             break;
 157         }
 158
 159     } while (0);
 160
 161     if (devname[0]) {
 162         char *s = strrchr(devname, ' ');
 163         if (!s)
 164            s = devname;
 165         else s++;
 166         if (strcmp("M1", s) == 0) {
 167            cardtype = AVM_CARDTYPE_M1;
 168         } else if (strcmp("M2", s) == 0) {
 169            cardtype = AVM_CARDTYPE_M2;
 170         } else {
 171            cardtype = AVM_CARDTYPE_B1;
 172         }
 173     } else
 174         cardtype = AVM_CARDTYPE_B1;
 175
 176     /* If any step failed, release any partially configured state */
 177     if (i != 0) {
 178         avmcs_release(link);
 179         return -ENODEV;
 180     }
 181
 182
 183     switch (cardtype) {
 184         case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
 185         case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
 186         default:
 187         case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
 188     }
 189     if ((i = (*addcard)(link->resource[0]->start, link->irq)) < 0) {
 190             dev_err(&link->dev,
 191                     "avm_cs: failed to add AVM-Controller at i/o %#x, irq %d\n",
 192                     (unsigned int) link->resource[0]->start, link->irq);
 193             avmcs_release(link);
 194             return -ENODEV;
 195     }
 196     return 0;
 197
 198 } /* avmcs_config */
 199
 200 /*======================================================================
 201
 202     After a card is removed, avmcs_release() will unregister the net
 203     device, and release the PCMCIA configuration.  If the device is
 204     still open, this will be postponed until it is closed.
 205
 206 ======================================================================*/
 207
 208 static void avmcs_release(struct pcmcia_device *link)
 209 {
 210         b1pcmcia_delcard(link->resource[0]->start, link->irq);
 211         pcmcia_disable_device(link);
 212 } /* avmcs_release */
 213
 214
 215 static struct pcmcia_device_id avmcs_ids[] = {
 216         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
 217         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
 218         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
 219         PCMCIA_DEVICE_NULL
 220 };
 221 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
 222
 223 static struct pcmcia_driver avmcs_driver = {
 224         .owner  = THIS_MODULE,
 225         .drv    = {
 226                 .name   = "avm_cs",
 227         },
 228         .probe = avmcs_probe,
 229         .remove = avmcs_detach,
 230         .id_table = avmcs_ids,
 231 };
 232
 233 static int __init avmcs_init(void)
 234 {
 235         return pcmcia_register_driver(&avmcs_driver);
 236 }
 237
 238 static void __exit avmcs_exit(void)
 239 {
 240         pcmcia_unregister_driver(&avmcs_driver);
 241 }
 242
 243 module_init(avmcs_init);
 244 module_exit(avmcs_exit);