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 /*====================================================================*/
  35
  36 /* Parameters that can be set with 'insmod' */
  37
  38 static int isdnprot = 2;
  39
  40 module_param(isdnprot, int, 0);
  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 avma1cs_config(struct pcmcia_device *link) __devinit ;
  54 static void avma1cs_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 avma1cs_detach(struct pcmcia_device *p_dev) __devexit ;
  63
  64
  65 /*
  66    A linked list of "instances" of the skeleton device.  Each actual
  67    PCMCIA card corresponds to one device instance, and is described
  68    by one struct pcmcia_device structure (defined in ds.h).
  69
  70    You may not want to use a linked list for this -- for example, the
  71    memory card driver uses an array of struct pcmcia_device pointers, where minor
  72    device numbers are used to derive the corresponding array index.
  73 */
  74
  75 /*
  76    A driver needs to provide a dev_node_t structure for each device
  77    on a card.  In some cases, there is only one device per card (for
  78    example, ethernet cards, modems).  In other cases, there may be
  79    many actual or logical devices (SCSI adapters, memory cards with
  80    multiple partitions).  The dev_node_t structures need to be kept
  81    in a linked list starting at the 'dev' field of a struct pcmcia_device
  82    structure.  We allocate them in the card's private data structure,
  83    because they generally can't be allocated dynamically.
  84 */
  85
  86 typedef struct local_info_t {
  87     dev_node_t  node;
  88 } local_info_t;
  89
  90 /*======================================================================
  91
  92     avma1cs_attach() creates an "instance" of the driver, allocating
  93     local data structures for one device.  The device is registered
  94     with Card Services.
  95
  96     The dev_link structure is initialized, but we don't actually
  97     configure the card at this point -- we wait until we receive a
  98     card insertion event.
  99
 100 ======================================================================*/
 101
 102 static int __devinit avma1cs_probe(struct pcmcia_device *p_dev)
 103 {
 104     local_info_t *local;
 105
 106     dev_dbg(&p_dev->dev, "avma1cs_attach()\n");
 107
 108     /* Allocate space for private device-specific data */
 109     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 110     if (!local)
 111         return -ENOMEM;
 112
 113     p_dev->priv = local;
 114
 115     /* The io structure describes IO port mapping */
 116     p_dev->io.NumPorts1 = 16;
 117     p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 118     p_dev->io.NumPorts2 = 16;
 119     p_dev->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
 120     p_dev->io.IOAddrLines = 5;
 121
 122     /* Interrupt setup */
 123     p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 124
 125     /* General socket configuration */
 126     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
 127     p_dev->conf.IntType = INT_MEMORY_AND_IO;
 128     p_dev->conf.ConfigIndex = 1;
 129     p_dev->conf.Present = PRESENT_OPTION;
 130
 131     return avma1cs_config(p_dev);
 132 } /* avma1cs_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 __devexit avma1cs_detach(struct pcmcia_device *link)
 144 {
 145         dev_dbg(&link->dev, "avma1cs_detach(0x%p)\n", link);
 146         avma1cs_release(link);
 147         kfree(link->priv);
 148 } /* avma1cs_detach */
 149
 150 /*======================================================================
 151
 152     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 153     is received, to configure the PCMCIA socket, and to make the
 154     ethernet device available to the system.
 155
 156 ======================================================================*/
 157
 158 static int avma1cs_configcheck(struct pcmcia_device *p_dev,
 159                                cistpl_cftable_entry_t *cf,
 160                                cistpl_cftable_entry_t *dflt,
 161                                unsigned int vcc,
 162                                void *priv_data)
 163 {
 164         if (cf->io.nwin <= 0)
 165                 return -ENODEV;
 166
 167         p_dev->io.BasePort1 = cf->io.win[0].base;
 168         p_dev->io.NumPorts1 = cf->io.win[0].len;
 169         p_dev->io.NumPorts2 = 0;
 170         printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
 171                p_dev->io.BasePort1,
 172                p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
 173         return pcmcia_request_io(p_dev, &p_dev->io);
 174 }
 175
 176
 177 static int __devinit avma1cs_config(struct pcmcia_device *link)
 178 {
 179     local_info_t *dev;
 180     int i;
 181     char devname[128];
 182     IsdnCard_t  icard;
 183     int busy = 0;
 184
 185     dev = link->priv;
 186
 187     dev_dbg(&link->dev, "avma1cs_config(0x%p)\n", link);
 188
 189     devname[0] = 0;
 190     if (link->prod_id[1])
 191             strlcpy(devname, link->prod_id[1], sizeof(devname));
 192
 193     if (pcmcia_loop_config(link, avma1cs_configcheck, NULL))
 194             return -ENODEV;
 195
 196     do {
 197         /*
 198          * allocate an interrupt line
 199          */
 200         i = pcmcia_request_irq(link, &link->irq);
 201         if (i != 0) {
 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 != 0) {
 212             pcmcia_disable_device(link);
 213             break;
 214         }
 215
 216     } while (0);
 217
 218     /* At this point, the dev_node_t structure(s) should be
 219        initialized and arranged in a linked list at link->dev. */
 220
 221     strcpy(dev->node.dev_name, "A1");
 222     dev->node.major = 45;
 223     dev->node.minor = 0;
 224     link->dev_node = &dev->node;
 225
 226     /* If any step failed, release any partially configured state */
 227     if (i != 0) {
 228         avma1cs_release(link);
 229         return -ENODEV;
 230     }
 231
 232     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 233                                 link->io.BasePort1, link->irq.AssignedIRQ);
 234
 235     icard.para[0] = link->irq.AssignedIRQ;
 236     icard.para[1] = link->io.BasePort1;
 237     icard.protocol = isdnprot;
 238     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 239
 240     i = hisax_init_pcmcia(link, &busy, &icard);
 241     if (i < 0) {
 242         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
 243         avma1cs_release(link);
 244         return -ENODEV;
 245     }
 246     dev->node.minor = i;
 247
 248     return 0;
 249 } /* avma1cs_config */
 250
 251 /*======================================================================
 252
 253     After a card is removed, avma1cs_release() will unregister the net
 254     device, and release the PCMCIA configuration.  If the device is
 255     still open, this will be postponed until it is closed.
 256
 257 ======================================================================*/
 258
 259 static void avma1cs_release(struct pcmcia_device *link)
 260 {
 261         local_info_t *local = link->priv;
 262
 263         dev_dbg(&link->dev, "avma1cs_release(0x%p)\n", link);
 264
 265         /* now unregister function with hisax */
 266         HiSax_closecard(local->node.minor);
 267
 268         pcmcia_disable_device(link);
 269 } /* avma1cs_release */
 270
 271
 272 static struct pcmcia_device_id avma1cs_ids[] = {
 273         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 274         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 275         PCMCIA_DEVICE_NULL
 276 };
 277 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 278
 279 static struct pcmcia_driver avma1cs_driver = {
 280         .owner          = THIS_MODULE,
 281         .drv            = {
 282                 .name   = "avma1_cs",
 283         },
 284         .probe          = avma1cs_probe,
 285         .remove         = __devexit_p(avma1cs_detach),
 286         .id_table       = avma1cs_ids,
 287 };
 288
 289 /*====================================================================*/
 290
 291 static int __init init_avma1_cs(void)
 292 {
 293         return(pcmcia_register_driver(&avma1cs_driver));
 294 }
 295
 296 static void __exit exit_avma1_cs(void)
 297 {
 298         pcmcia_unregister_driver(&avma1cs_driver);
 299 }
 300
 301 module_init(init_avma1_cs);
 302 module_exit(exit_avma1_cs);