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_EXCLUSIVE;
 112     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
 113
 114     /* General socket configuration */
 115     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 116     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 117     p_dev->conf.ConfigIndex = 1;
 118     p_dev->conf.Present = PRESENT_OPTION;
 119
 120     /* Allocate space for private device-specific data */
 121     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 122     if (!local)
 123         goto err;
 124     p_dev->priv = local;
 125
 126     return avmcs_config(p_dev);
 127
 128  err:
 129     return -ENOMEM;
 130 } /* avmcs_attach */
 131
 132 /*======================================================================
 133
 134     This deletes a driver "instance".  The device is de-registered
 135     with Card Services.  If it has been released, all local data
 136     structures are freed.  Otherwise, the structures will be freed
 137     when the device is released.
 138
 139 ======================================================================*/
 140
 141 static void avmcs_detach(struct pcmcia_device *link)
 142 {
 143         avmcs_release(link);
 144         kfree(link->priv);
 145 } /* avmcs_detach */
 146
 147 /*======================================================================
 148
 149     avmcs_config() is scheduled to run after a CARD_INSERTION event
 150     is received, to configure the PCMCIA socket, and to make the
 151     ethernet device available to the system.
 152
 153 ======================================================================*/
 154
 155 static int avmcs_configcheck(struct pcmcia_device *p_dev,
 156                              cistpl_cftable_entry_t *cf,
 157                              cistpl_cftable_entry_t *dflt,
 158                              unsigned int vcc,
 159                              void *priv_data)
 160 {
 161         if (cf->io.nwin <= 0)
 162                 return -ENODEV;
 163
 164         p_dev->io.BasePort1 = cf->io.win[0].base;
 165         p_dev->io.NumPorts1 = cf->io.win[0].len;
 166         p_dev->io.NumPorts2 = 0;
 167         printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
 168                p_dev->io.BasePort1,
 169                p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
 170         return pcmcia_request_io(p_dev, &p_dev->io);
 171 }
 172
 173 static int avmcs_config(struct pcmcia_device *link)
 174 {
 175     local_info_t *dev;
 176     int i;
 177     char devname[128];
 178     int cardtype;
 179     int (*addcard)(unsigned int port, unsigned irq);
 180
 181     dev = link->priv;
 182
 183     devname[0] = 0;
 184     if (link->prod_id[1])
 185             strlcpy(devname, link->prod_id[1], sizeof(devname));
 186
 187     /*
 188      * find IO port
 189      */
 190     if (pcmcia_loop_config(link, avmcs_configcheck, NULL))
 191             return -ENODEV;
 192
 193     do {
 194         /*
 195          * allocate an interrupt line
 196          */
 197         i = pcmcia_request_irq(link, &link->irq);
 198         if (i != 0) {
 199             /* undo */
 200             pcmcia_disable_device(link);
 201             break;
 202         }
 203
 204         /*
 205          * configure the PCMCIA socket
 206           */
 207         i = pcmcia_request_configuration(link, &link->conf);
 208         if (i != 0) {
 209             pcmcia_disable_device(link);
 210             break;
 211         }
 212
 213     } while (0);
 214
 215     /* At this point, the dev_node_t structure(s) should be
 216        initialized and arranged in a linked list at link->dev. */
 217
 218     if (devname[0]) {
 219         char *s = strrchr(devname, ' ');
 220         if (!s)
 221            s = devname;
 222         else s++;
 223         strcpy(dev->node.dev_name, s);
 224         if (strcmp("M1", s) == 0) {
 225            cardtype = AVM_CARDTYPE_M1;
 226         } else if (strcmp("M2", s) == 0) {
 227            cardtype = AVM_CARDTYPE_M2;
 228         } else {
 229            cardtype = AVM_CARDTYPE_B1;
 230         }
 231     } else {
 232         strcpy(dev->node.dev_name, "b1");
 233         cardtype = AVM_CARDTYPE_B1;
 234     }
 235
 236     dev->node.major = 64;
 237     dev->node.minor = 0;
 238     link->dev_node = &dev->node;
 239
 240     /* If any step failed, release any partially configured state */
 241     if (i != 0) {
 242         avmcs_release(link);
 243         return -ENODEV;
 244     }
 245
 246
 247     switch (cardtype) {
 248         case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
 249         case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
 250         default:
 251         case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
 252     }
 253     if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
 254         printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
 255                 dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
 256         avmcs_release(link);
 257         return -ENODEV;
 258     }
 259     dev->node.minor = i;
 260     return 0;
 261
 262 } /* avmcs_config */
 263
 264 /*======================================================================
 265
 266     After a card is removed, avmcs_release() will unregister the net
 267     device, and release the PCMCIA configuration.  If the device is
 268     still open, this will be postponed until it is closed.
 269
 270 ======================================================================*/
 271
 272 static void avmcs_release(struct pcmcia_device *link)
 273 {
 274         b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
 275         pcmcia_disable_device(link);
 276 } /* avmcs_release */
 277
 278
 279 static struct pcmcia_device_id avmcs_ids[] = {
 280         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
 281         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
 282         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
 283         PCMCIA_DEVICE_NULL
 284 };
 285 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
 286
 287 static struct pcmcia_driver avmcs_driver = {
 288         .owner  = THIS_MODULE,
 289         .drv    = {
 290                 .name   = "avm_cs",
 291         },
 292         .probe = avmcs_probe,
 293         .remove = avmcs_detach,
 294         .id_table = avmcs_ids,
 295 };
 296
 297 static int __init avmcs_init(void)
 298 {
 299         return pcmcia_register_driver(&avmcs_driver);
 300 }
 301
 302 static void __exit avmcs_exit(void)
 303 {
 304         pcmcia_unregister_driver(&avmcs_driver);
 305 }
 306
 307 module_init(avmcs_init);
 308 module_exit(avmcs_exit);