drivers/isdn/hisax/avma1_cs.c

   1 /*
   2  * PCMCIA client driver for AVM A1 / Fritz!PCMCIA
   3  *
   4  * Author       Carsten Paeth
   5  * Copyright    1998-2001 by Carsten Paeth <calle@calle.in-berlin.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
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/ptrace.h>
  18 #include <linux/slab.h>
  19 #include <linux/string.h>
  20 #include <asm/io.h>
  21 #include <asm/system.h>
  22
  23 #include <pcmcia/cs_types.h>
  24 #include <pcmcia/cs.h>
  25 #include <pcmcia/cistpl.h>
  26 #include <pcmcia/ds.h>
  27 #include "hisax_cfg.h"
  28
  29 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
  30 MODULE_AUTHOR("Carsten Paeth");
  31 MODULE_LICENSE("GPL");
  32
  33 /*
  34    All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
  35    you do not define PCMCIA_DEBUG at all, all the debug code will be
  36    left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
  37    be present but disabled -- but it can then be enabled for specific
  38    modules at load time with a 'pc_debug=#' option to insmod.
  39 */
  40 #ifdef PCMCIA_DEBUG
  41 static int pc_debug = PCMCIA_DEBUG;
  42 module_param(pc_debug, int, 0);
  43 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
  44 static char *version =
  45 "avma1_cs.c 1.00 1998/01/23 10:00:00 (Carsten Paeth)";
  46 #else
  47 #define DEBUG(n, args...)
  48 #endif
  49
  50 /*====================================================================*/
  51
  52 /* Parameters that can be set with 'insmod' */
  53
  54 static int isdnprot = 2;
  55
  56 module_param(isdnprot, int, 0);
  57
  58 /*====================================================================*/
  59
  60 /*
  61    The event() function is this driver's Card Services event handler.
  62    It will be called by Card Services when an appropriate card status
  63    event is received.  The config() and release() entry points are
  64    used to configure or release a socket, in response to card insertion
  65    and ejection events.  They are invoked from the skeleton event
  66    handler.
  67 */
  68
  69 static int avma1cs_config(struct pcmcia_device *link);
  70 static void avma1cs_release(struct pcmcia_device *link);
  71
  72 /*
  73    The attach() and detach() entry points are used to create and destroy
  74    "instances" of the driver, where each instance represents everything
  75    needed to manage one actual PCMCIA card.
  76 */
  77
  78 static void avma1cs_detach(struct pcmcia_device *p_dev);
  79
  80
  81 /*
  82    A linked list of "instances" of the skeleton device.  Each actual
  83    PCMCIA card corresponds to one device instance, and is described
  84    by one struct pcmcia_device structure (defined in ds.h).
  85
  86    You may not want to use a linked list for this -- for example, the
  87    memory card driver uses an array of struct pcmcia_device pointers, where minor
  88    device numbers are used to derive the corresponding array index.
  89 */
  90
  91 /*
  92    A driver needs to provide a dev_node_t structure for each device
  93    on a card.  In some cases, there is only one device per card (for
  94    example, ethernet cards, modems).  In other cases, there may be
  95    many actual or logical devices (SCSI adapters, memory cards with
  96    multiple partitions).  The dev_node_t structures need to be kept
  97    in a linked list starting at the 'dev' field of a struct pcmcia_device
  98    structure.  We allocate them in the card's private data structure,
  99    because they generally can't be allocated dynamically.
 100 */
 101
 102 typedef struct local_info_t {
 103     dev_node_t  node;
 104 } local_info_t;
 105
 106 /*======================================================================
 107
 108     avma1cs_attach() creates an "instance" of the driver, allocating
 109     local data structures for one device.  The device is registered
 110     with Card Services.
 111
 112     The dev_link structure is initialized, but we don't actually
 113     configure the card at this point -- we wait until we receive a
 114     card insertion event.
 115
 116 ======================================================================*/
 117
 118 static int avma1cs_probe(struct pcmcia_device *p_dev)
 119 {
 120     local_info_t *local;
 121
 122     DEBUG(0, "avma1cs_attach()\n");
 123
 124     /* Allocate space for private device-specific data */
 125     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 126     if (!local)
 127         return -ENOMEM;
 128
 129     p_dev->priv = local;
 130
 131     /* The io structure describes IO port mapping */
 132     p_dev->io.NumPorts1 = 16;
 133     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 134     p_dev->io.NumPorts2 = 16;
 135     p_dev->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
 136     p_dev->io.IOAddrLines = 5;
 137
 138     /* Interrupt setup */
 139     p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 140     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
 141
 142     p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
 143
 144     /* General socket configuration */
 145     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 146     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 147     p_dev->conf.ConfigIndex = 1;
 148     p_dev->conf.Present = PRESENT_OPTION;
 149
 150     return avma1cs_config(p_dev);
 151 } /* avma1cs_attach */
 152
 153 /*======================================================================
 154
 155     This deletes a driver "instance".  The device is de-registered
 156     with Card Services.  If it has been released, all local data
 157     structures are freed.  Otherwise, the structures will be freed
 158     when the device is released.
 159
 160 ======================================================================*/
 161
 162 static void avma1cs_detach(struct pcmcia_device *link)
 163 {
 164         DEBUG(0, "avma1cs_detach(0x%p)\n", link);
 165         avma1cs_release(link);
 166         kfree(link->priv);
 167 } /* avma1cs_detach */
 168
 169 /*======================================================================
 170
 171     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 172     is received, to configure the PCMCIA socket, and to make the
 173     ethernet device available to the system.
 174
 175 ======================================================================*/
 176
 177 static int avma1cs_configcheck(struct pcmcia_device *p_dev,
 178                                cistpl_cftable_entry_t *cf,
 179                                cistpl_cftable_entry_t *dflt,
 180                                unsigned int vcc,
 181                                void *priv_data)
 182 {
 183         if (cf->io.nwin <= 0)
 184                 return -ENODEV;
 185
 186         p_dev->io.BasePort1 = cf->io.win[0].base;
 187         p_dev->io.NumPorts1 = cf->io.win[0].len;
 188         p_dev->io.NumPorts2 = 0;
 189         printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
 190                p_dev->io.BasePort1,
 191                p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
 192         return pcmcia_request_io(p_dev, &p_dev->io);
 193 }
 194
 195
 196 static int avma1cs_config(struct pcmcia_device *link)
 197 {
 198     local_info_t *dev;
 199     int i;
 200     char devname[128];
 201     IsdnCard_t  icard;
 202     int busy = 0;
 203
 204     dev = link->priv;
 205
 206     DEBUG(0, "avma1cs_config(0x%p)\n", link);
 207
 208     devname[0] = 0;
 209     if (link->prod_id[1])
 210             strlcpy(devname, link->prod_id[1], sizeof(devname));
 211
 212     if (pcmcia_loop_config(link, avma1cs_configcheck, NULL))
 213             return -ENODEV;
 214
 215     do {
 216         /*
 217          * allocate an interrupt line
 218          */
 219         i = pcmcia_request_irq(link, &link->irq);
 220         if (i != 0) {
 221             cs_error(link, RequestIRQ, i);
 222             /* undo */
 223             pcmcia_disable_device(link);
 224             break;
 225         }
 226
 227         /*
 228          * configure the PCMCIA socket
 229          */
 230         i = pcmcia_request_configuration(link, &link->conf);
 231         if (i != 0) {
 232             cs_error(link, RequestConfiguration, i);
 233             pcmcia_disable_device(link);
 234             break;
 235         }
 236
 237     } while (0);
 238
 239     /* At this point, the dev_node_t structure(s) should be
 240        initialized and arranged in a linked list at link->dev. */
 241
 242     strcpy(dev->node.dev_name, "A1");
 243     dev->node.major = 45;
 244     dev->node.minor = 0;
 245     link->dev_node = &dev->node;
 246
 247     /* If any step failed, release any partially configured state */
 248     if (i != 0) {
 249         avma1cs_release(link);
 250         return -ENODEV;
 251     }
 252
 253     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 254                                 link->io.BasePort1, link->irq.AssignedIRQ);
 255
 256     icard.para[0] = link->irq.AssignedIRQ;
 257     icard.para[1] = link->io.BasePort1;
 258     icard.protocol = isdnprot;
 259     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 260
 261     i = hisax_init_pcmcia(link, &busy, &icard);
 262     if (i < 0) {
 263         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
 264         avma1cs_release(link);
 265         return -ENODEV;
 266     }
 267     dev->node.minor = i;
 268
 269     return 0;
 270 } /* avma1cs_config */
 271
 272 /*======================================================================
 273
 274     After a card is removed, avma1cs_release() will unregister the net
 275     device, and release the PCMCIA configuration.  If the device is
 276     still open, this will be postponed until it is closed.
 277
 278 ======================================================================*/
 279
 280 static void avma1cs_release(struct pcmcia_device *link)
 281 {
 282         local_info_t *local = link->priv;
 283
 284         DEBUG(0, "avma1cs_release(0x%p)\n", link);
 285
 286         /* now unregister function with hisax */
 287         HiSax_closecard(local->node.minor);
 288
 289         pcmcia_disable_device(link);
 290 } /* avma1cs_release */
 291
 292
 293 static struct pcmcia_device_id avma1cs_ids[] = {
 294         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 295         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 296         PCMCIA_DEVICE_NULL
 297 };
 298 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 299
 300 static struct pcmcia_driver avma1cs_driver = {
 301         .owner          = THIS_MODULE,
 302         .drv            = {
 303                 .name   = "avma1_cs",
 304         },
 305         .probe          = avma1cs_probe,
 306         .remove         = avma1cs_detach,
 307         .id_table       = avma1cs_ids,
 308 };
 309
 310 /*====================================================================*/
 311
 312 static int __init init_avma1_cs(void)
 313 {
 314         return(pcmcia_register_driver(&avma1cs_driver));
 315 }
 316
 317 static void __exit exit_avma1_cs(void)
 318 {
 319         pcmcia_unregister_driver(&avma1cs_driver);
 320 }
 321
 322 module_init(init_avma1_cs);
 323 module_exit(exit_avma1_cs);