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     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 115
 116     /* General socket configuration */
 117     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 118     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 119     p_dev->conf.ConfigIndex = 1;
 120     p_dev->conf.Present = PRESENT_OPTION;
 121
 122     /* Allocate space for private device-specific data */
 123     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 124     if (!local)
 125         goto err;
 126     p_dev->priv = local;
 127
 128     return avmcs_config(p_dev);
 129
 130  err:
 131     return -ENOMEM;
 132 } /* avmcs_attach */
 133
 134 /*======================================================================
 135
 136     This deletes a driver "instance".  The device is de-registered
 137     with Card Services.  If it has been released, all local data
 138     structures are freed.  Otherwise, the structures will be freed
 139     when the device is released.
 140
 141 ======================================================================*/
 142
 143 static void avmcs_detach(struct pcmcia_device *link)
 144 {
 145         avmcs_release(link);
 146         kfree(link->priv);
 147 } /* avmcs_detach */
 148
 149 /*======================================================================
 150
 151     avmcs_config() is scheduled to run after a CARD_INSERTION event
 152     is received, to configure the PCMCIA socket, and to make the
 153     ethernet device available to the system.
 154
 155 ======================================================================*/
 156
 157 static int avmcs_configcheck(struct pcmcia_device *p_dev,
 158                              cistpl_cftable_entry_t *cf,
 159                              cistpl_cftable_entry_t *dflt,
 160                              unsigned int vcc,
 161                              void *priv_data)
 162 {
 163         if (cf->io.nwin <= 0)
 164                 return -ENODEV;
 165
 166         p_dev->io.BasePort1 = cf->io.win[0].base;
 167         p_dev->io.NumPorts1 = cf->io.win[0].len;
 168         p_dev->io.NumPorts2 = 0;
 169         printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
 170                p_dev->io.BasePort1,
 171                p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
 172         return pcmcia_request_io(p_dev, &p_dev->io);
 173 }
 174
 175 static int avmcs_config(struct pcmcia_device *link)
 176 {
 177     local_info_t *dev;
 178     int i;
 179     char devname[128];
 180     int cardtype;
 181     int (*addcard)(unsigned int port, unsigned irq);
 182
 183     dev = link->priv;
 184
 185     devname[0] = 0;
 186     if (link->prod_id[1])
 187             strlcpy(devname, link->prod_id[1], sizeof(devname));
 188
 189     /*
 190      * find IO port
 191      */
 192     if (pcmcia_loop_config(link, avmcs_configcheck, NULL))
 193             return -ENODEV;
 194
 195     do {
 196         /*
 197          * allocate an interrupt line
 198          */
 199         i = pcmcia_request_irq(link, &link->irq);
 200         if (i != CS_SUCCESS) {
 201             cs_error(link, RequestIRQ, i);
 202             /* undo */
 203             pcmcia_disable_device(link);
 204             break;
 205         }
 206
 207         /*
 208          * configure the PCMCIA socket
 209           */
 210         i = pcmcia_request_configuration(link, &link->conf);
 211         if (i != CS_SUCCESS) {
 212             cs_error(link, RequestConfiguration, i);
 213             pcmcia_disable_device(link);
 214             break;
 215         }
 216
 217     } while (0);
 218
 219     /* At this point, the dev_node_t structure(s) should be
 220        initialized and arranged in a linked list at link->dev. */
 221
 222     if (devname[0]) {
 223         char *s = strrchr(devname, ' ');
 224         if (!s)
 225            s = devname;
 226         else s++;
 227         strcpy(dev->node.dev_name, s);
 228         if (strcmp("M1", s) == 0) {
 229            cardtype = AVM_CARDTYPE_M1;
 230         } else if (strcmp("M2", s) == 0) {
 231            cardtype = AVM_CARDTYPE_M2;
 232         } else {
 233            cardtype = AVM_CARDTYPE_B1;
 234         }
 235     } else {
 236         strcpy(dev->node.dev_name, "b1");
 237         cardtype = AVM_CARDTYPE_B1;
 238     }
 239
 240     dev->node.major = 64;
 241     dev->node.minor = 0;
 242     link->dev_node = &dev->node;
 243
 244     /* If any step failed, release any partially configured state */
 245     if (i != 0) {
 246         avmcs_release(link);
 247         return -ENODEV;
 248     }
 249
 250
 251     switch (cardtype) {
 252         case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
 253         case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
 254         default:
 255         case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
 256     }
 257     if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
 258         printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
 259                 dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
 260         avmcs_release(link);
 261         return -ENODEV;
 262     }
 263     dev->node.minor = i;
 264     return 0;
 265
 266 } /* avmcs_config */
 267
 268 /*======================================================================
 269
 270     After a card is removed, avmcs_release() will unregister the net
 271     device, and release the PCMCIA configuration.  If the device is
 272     still open, this will be postponed until it is closed.
 273
 274 ======================================================================*/
 275
 276 static void avmcs_release(struct pcmcia_device *link)
 277 {
 278         b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
 279         pcmcia_disable_device(link);
 280 } /* avmcs_release */
 281
 282
 283 static struct pcmcia_device_id avmcs_ids[] = {
 284         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
 285         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
 286         PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
 287         PCMCIA_DEVICE_NULL
 288 };
 289 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
 290
 291 static struct pcmcia_driver avmcs_driver = {
 292         .owner  = THIS_MODULE,
 293         .drv    = {
 294                 .name   = "avm_cs",
 295         },
 296         .probe = avmcs_probe,
 297         .remove = avmcs_detach,
 298         .id_table = avmcs_ids,
 299 };
 300
 301 static int __init avmcs_init(void)
 302 {
 303         return pcmcia_register_driver(&avmcs_driver);
 304 }
 305
 306 static void __exit avmcs_exit(void)
 307 {
 308         pcmcia_unregister_driver(&avmcs_driver);
 309 }
 310
 311 module_init(avmcs_init);
 312 module_exit(avmcs_exit);