drivers/isdn/hardware/avm/avm_cs.c

   1 /* $Id: avm_cs.c,v 1.4.6.3 2001/09/23 22:24:33 kai 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/slab.h>
  17 #include <linux/string.h>
  18 #include <linux/tty.h>
  19 #include <linux/serial.h>
  20 #include <linux/major.h>
  21 #include <asm/io.h>
  22 #include <asm/system.h>
  23
  24 #include <pcmcia/cs_types.h>
  25 #include <pcmcia/cs.h>
  26 #include <pcmcia/cistpl.h>
  27 #include <pcmcia/ciscode.h>
  28 #include <pcmcia/ds.h>
  29 #include <pcmcia/cisreg.h>
  30
  31 #include <linux/skbuff.h>
  32 #include <linux/capi.h>
  33 #include <linux/b1lli.h>
  34 #include <linux/b1pcmcia.h>
  35
  36 /*====================================================================*/
  37
  38 MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
  39 MODULE_AUTHOR("Carsten Paeth");
  40 MODULE_LICENSE("GPL");
  41
  42 /*====================================================================*/
  43
  44 /*
  45    The event() function is this driver's Card Services event handler.
  46    It will be called by Card Services when an appropriate card status
  47    event is received.  The config() and release() entry points are
  48    used to configure or release a socket, in response to card insertion
  49    and ejection events.  They are invoked from the skeleton event
  50    handler.
  51 */
  52
  53 static int avmcs_config(struct pcmcia_device *link);
  54 static void avmcs_release(struct pcmcia_device *link);
  55
  56 /*
  57    The attach() and detach() entry points are used to create and destroy
  58    "instances" of the driver, where each instance represents everything
  59    needed to manage one actual PCMCIA card.
  60 */
  61
  62 static void avmcs_detach(struct pcmcia_device *p_dev);
  63
  64 /*
  65    A linked list of "instances" of the skeleton device.  Each actual
  66    PCMCIA card corresponds to one device instance, and is described
  67    by one struct pcmcia_device structure (defined in ds.h).
  68
  69    You may not want to use a linked list for this -- for example, the
  70    memory card driver uses an array of struct pcmcia_device pointers, where minor
  71    device numbers are used to derive the corresponding array index.
  72 */
  73
  74 /*
  75    A driver needs to provide a dev_node_t structure for each device
  76    on a card.  In some cases, there is only one device per card (for
  77    example, ethernet cards, modems).  In other cases, there may be
  78    many actual or logical devices (SCSI adapters, memory cards with
  79    multiple partitions).  The dev_node_t structures need to be kept
  80    in a linked list starting at the 'dev' field of a struct pcmcia_device
  81    structure.  We allocate them in the card's private data structure,
  82    because they generally can't be allocated dynamically.
  83 */
  84
  85 typedef struct local_info_t {
  86     dev_node_t  node;
  87 } local_info_t;
  88
  89 /*======================================================================
  90
  91     avmcs_attach() creates an "instance" of the driver, allocating
  92     local data structures for one device.  The device is registered
  93     with Card Services.
  94
  95     The dev_link structure is initialized, but we don't actually
  96     configure the card at this point -- we wait until we receive a
  97     card insertion event.
  98
  99 ======================================================================*/
 100
 101 static int avmcs_probe(struct pcmcia_device *p_dev)
 102 {
 103     local_info_t *local;
 104
 105     /* The io structure describes IO port mapping */
 106     p_dev->io.NumPorts1 = 16;
 107     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 108     p_dev->io.NumPorts2 = 0;
 109
 110     /* Interrupt setup */
 111     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 112
 113     /* General socket configuration */
 114     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 115     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 116     p_dev->conf.ConfigIndex = 1;
 117     p_dev->conf.Present = PRESENT_OPTION;
 118
 119     /* Allocate space for private device-specific data */
 120     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 121     if (!local)
 122         goto err;
 123     p_dev->priv = local;
 124
 125     return avmcs_config(p_dev);
 126
 127  err:
 128     return -ENOMEM;
 129 } /* avmcs_attach */
 130
 131 /*======================================================================
 132
 133     This deletes a driver "instance".  The device is de-registered
 134     with Card Services.  If it has been released, all local data
 135     structures are freed.  Otherwise, the structures will be freed
 136     when the device is released.
 137
 138 ======================================================================*/
 139
 140 static void avmcs_detach(struct pcmcia_device *link)
 141 {
 142         avmcs_release(link);
 143         kfree(link->priv);
 144 } /* avmcs_detach */
 145
 146 /*======================================================================
 147
 148     avmcs_config() is scheduled to run after a CARD_INSERTION event
 149     is received, to configure the PCMCIA socket, and to make the
 150     ethernet device available to the system.
 151
 152 ======================================================================*/
 153
 154 static int avmcs_configcheck(struct pcmcia_device *p_dev,
 155                              cistpl_cftable_entry_t *cf,
 156                              cistpl_cftable_entry_t *dflt,
 157                              unsigned int vcc,
 158                              void *priv_data)
 159 {
 160         if (cf->io.nwin <= 0)
 161                 return -ENODEV;
 162
 163         p_dev->io.BasePort1 = cf->io.win[0].base;
 164         p_dev->io.NumPorts1 = cf->io.win[0].len;
 165         p_dev->io.NumPorts2 = 0;
 166         printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
 167                p_dev->io.BasePort1,
 168                p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
 169         return pcmcia_request_io(p_dev, &p_dev->io);
 170 }
 171
 172 static int avmcs_config(struct pcmcia_device *link)
 173 {
 174     local_info_t *dev;
 175     int i;
 176     char devname[128];
 177     int cardtype;
 178     int (*addcard)(unsigned int port, unsigned irq);
 179
 180     dev = link->priv;
 181
 182     devname[0] = 0;
 183     if (link->prod_id[1])
 184             strlcpy(devname, link->prod_id[1], sizeof(devname));
 185
 186     /*
 187      * find IO port
 188      */
 189     if (pcmcia_loop_config(link, avmcs_configcheck, NULL))
 190             return -ENODEV;
 191
 192     do {
 193         /*
 194          * allocate an interrupt line
 195          */
 196         i = pcmcia_request_irq(link, &link->irq);
 197         if (i != 0) {
 198             /* undo */
 199             pcmcia_disable_device(link);
 200             break;
 201         }
 202
 203         /*
 204          * configure the PCMCIA socket
 205           */
 206         i = pcmcia_request_configuration(link, &link->conf);
 207         if (i != 0) {
 208             pcmcia_disable_device(link);
 209             break;
 210         }
 211
 212     } while (0);
 213
 214     /* At this point, the dev_node_t structure(s) should be
 215        initialized and arranged in a linked list at link->dev. */
 216
 217     if (devname[0]) {
 218         char *s = strrchr(devname, ' ');
 219         if (!s)
 220            s = devname;
 221         else s++;
 222         strcpy(dev->node.dev_name, s);
 223         if (strcmp("M1", s) == 0) {
 224            cardtype = AVM_CARDTYPE_M1;
 225         } else if (strcmp("M2", s) == 0) {
 226            cardtype = AVM_CARDTYPE_M2;
 227         } else {
 228            cardtype = AVM_CARDTYPE_B1;
 229         }
 230     } else {
 231         strcpy(dev->node.dev_name, "b1");
 232         cardtype = AVM_CARDTYPE_B1;
 233     }
 234
 235     dev->node.major = 64;
 236     dev->node.minor = 0;
 237     link->dev_node = &dev->node;
 238
 239     /* If any step failed, release any partially configured state */
 240     if (i != 0) {
 241         avmcs_release(link);
 242         return -ENODEV;
 243     }
 244
 245
 246     switch (cardtype) {
 247         case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
 248         case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
 249         default:
 250         case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
 251     }
 252     if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
 253         printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
 254                 dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
 255         avmcs_release(link);
 256         return -ENODEV;
 257     }
 258     dev->node.minor = i;
 259     return 0;
 260
 261 } /* avmcs_config */
 262
 263 /*======================================================================
 264
 265     After a card is removed, avmcs_release() will unregister the net
 266     device, and release the PCMCIA configuration.  If the device is
 267     still open, this will be postponed until it is closed.
 268
 269 ======================================================================*/
 270
 271 static void avmcs_release(struct pcmcia_device *link)
 272 {
 273         b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
 274         pcmcia_disable_device(link);
 275 } /* avmcs_release */
 276
 277
 278 static struct pcmcia_device_id avmcs_ids[] = {
 279         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
 280         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
 281         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
 282         PCMCIA_DEVICE_NULL
 283 };
 284 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
 285
 286 static struct pcmcia_driver avmcs_driver = {
 287         .owner  = THIS_MODULE,
 288         .drv    = {
 289                 .name   = "avm_cs",
 290         },
 291         .probe = avmcs_probe,
 292         .remove = avmcs_detach,
 293         .id_table = avmcs_ids,
 294 };
 295
 296 static int __init avmcs_init(void)
 297 {
 298         return pcmcia_register_driver(&avmcs_driver);
 299 }
 300
 301 static void __exit avmcs_exit(void)
 302 {
 303         pcmcia_unregister_driver(&avmcs_driver);
 304 }
 305
 306 module_init(avmcs_init);
 307 module_exit(avmcs_exit);