drivers/isdn/hisax/teles_cs.c

   1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
   2 /*======================================================================
   3
   4     A teles S0 PCMCIA client driver
   5
   6     Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
   7     Written by Christof Petig, christof.petig@wtal.de
   8
   9     Also inspired by ELSA PCMCIA driver
  10     by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
  11
  12     Extentions to new hisax_pcmcia by Karsten Keil
  13
  14     minor changes to be compatible with kernel 2.4.x
  15     by Jan.Schubert@GMX.li
  16
  17 ======================================================================*/
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.h>
  25 #include <linux/timer.h>
  26 #include <linux/ioport.h>
  27 #include <asm/io.h>
  28 #include <asm/system.h>
  29
  30 #include <pcmcia/cs_types.h>
  31 #include <pcmcia/cs.h>
  32 #include <pcmcia/cistpl.h>
  33 #include <pcmcia/cisreg.h>
  34 #include <pcmcia/ds.h>
  35 #include "hisax_cfg.h"
  36
  37 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
  38 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
  39 MODULE_LICENSE("GPL");
  40
  41
  42 /*====================================================================*/
  43
  44 /* Parameters that can be set with 'insmod' */
  45
  46 static int protocol = 2;        /* EURO-ISDN Default */
  47 module_param(protocol, int, 0);
  48
  49 /*====================================================================*/
  50
  51 /*
  52    The event() function is this driver's Card Services event handler.
  53    It will be called by Card Services when an appropriate card status
  54    event is received.  The config() and release() entry points are
  55    used to configure or release a socket, in response to card insertion
  56    and ejection events.  They are invoked from the teles_cs event
  57    handler.
  58 */
  59
  60 static int teles_cs_config(struct pcmcia_device *link);
  61 static void teles_cs_release(struct pcmcia_device *link);
  62
  63 /*
  64    The attach() and detach() entry points are used to create and destroy
  65    "instances" of the driver, where each instance represents everything
  66    needed to manage one actual PCMCIA card.
  67 */
  68
  69 static void teles_detach(struct pcmcia_device *p_dev);
  70
  71 /*
  72    A linked list of "instances" of the teles_cs device.  Each actual
  73    PCMCIA card corresponds to one device instance, and is described
  74    by one struct pcmcia_device structure (defined in ds.h).
  75
  76    You may not want to use a linked list for this -- for example, the
  77    memory card driver uses an array of struct pcmcia_device pointers, where minor
  78    device numbers are used to derive the corresponding array index.
  79 */
  80
  81 /*
  82    A driver needs to provide a dev_node_t structure for each device
  83    on a card.  In some cases, there is only one device per card (for
  84    example, ethernet cards, modems).  In other cases, there may be
  85    many actual or logical devices (SCSI adapters, memory cards with
  86    multiple partitions).  The dev_node_t structures need to be kept
  87    in a linked list starting at the 'dev' field of a struct pcmcia_device
  88    structure.  We allocate them in the card's private data structure,
  89    because they generally shouldn't be allocated dynamically.
  90    In this case, we also provide a flag to indicate if a device is
  91    "stopped" due to a power management event, or card ejection.  The
  92    device IO routines can use a flag like this to throttle IO to a
  93    card that is not ready to accept it.
  94 */
  95
  96 typedef struct local_info_t {
  97         struct pcmcia_device    *p_dev;
  98     dev_node_t          node;
  99     int                 busy;
 100     int                 cardnr;
 101 } local_info_t;
 102
 103 /*======================================================================
 104
 105     teles_attach() creates an "instance" of the driver, allocatingx
 106     local data structures for one device.  The device is registered
 107     with Card Services.
 108
 109     The dev_link structure is initialized, but we don't actually
 110     configure the card at this point -- we wait until we receive a
 111     card insertion event.
 112
 113 ======================================================================*/
 114
 115 static int teles_probe(struct pcmcia_device *link)
 116 {
 117     local_info_t *local;
 118
 119     dev_dbg(&link->dev, "teles_attach()\n");
 120
 121     /* Allocate space for private device-specific data */
 122     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 123     if (!local) return -ENOMEM;
 124     local->cardnr = -1;
 125
 126     local->p_dev = link;
 127     link->priv = local;
 128
 129     /* Interrupt setup */
 130     link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 131     link->irq.Handler = NULL;
 132
 133     /*
 134       General socket configuration defaults can go here.  In this
 135       client, we assume very little, and rely on the CIS for almost
 136       everything.  In most clients, many details (i.e., number, sizes,
 137       and attributes of IO windows) are fixed by the nature of the
 138       device, and can be hard-wired here.
 139     */
 140     link->io.NumPorts1 = 96;
 141     link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 142     link->io.IOAddrLines = 5;
 143
 144     link->conf.Attributes = CONF_ENABLE_IRQ;
 145     link->conf.IntType = INT_MEMORY_AND_IO;
 146
 147     return teles_cs_config(link);
 148 } /* teles_attach */
 149
 150 /*======================================================================
 151
 152     This deletes a driver "instance".  The device is de-registered
 153     with Card Services.  If it has been released, all local data
 154     structures are freed.  Otherwise, the structures will be freed
 155     when the device is released.
 156
 157 ======================================================================*/
 158
 159 static void teles_detach(struct pcmcia_device *link)
 160 {
 161         local_info_t *info = link->priv;
 162
 163         dev_dbg(&link->dev, "teles_detach(0x%p)\n", link);
 164
 165         info->busy = 1;
 166         teles_cs_release(link);
 167
 168         kfree(info);
 169 } /* teles_detach */
 170
 171 /*======================================================================
 172
 173     teles_cs_config() is scheduled to run after a CARD_INSERTION event
 174     is received, to configure the PCMCIA socket, and to make the
 175     device available to the system.
 176
 177 ======================================================================*/
 178
 179 static int teles_cs_configcheck(struct pcmcia_device *p_dev,
 180                                 cistpl_cftable_entry_t *cf,
 181                                 cistpl_cftable_entry_t *dflt,
 182                                 unsigned int vcc,
 183                                 void *priv_data)
 184 {
 185         int j;
 186
 187         if ((cf->io.nwin > 0) && cf->io.win[0].base) {
 188                 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
 189                 p_dev->io.BasePort1 = cf->io.win[0].base;
 190                 if (!pcmcia_request_io(p_dev, &p_dev->io))
 191                         return 0;
 192         } else {
 193                 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
 194                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
 195                         p_dev->io.BasePort1 = j;
 196                         if (!pcmcia_request_io(p_dev, &p_dev->io))
 197                                 return 0;
 198                 }
 199         }
 200         return -ENODEV;
 201 }
 202
 203 static int teles_cs_config(struct pcmcia_device *link)
 204 {
 205     local_info_t *dev;
 206     int i;
 207     IsdnCard_t icard;
 208
 209     dev_dbg(&link->dev, "teles_config(0x%p)\n", link);
 210     dev = link->priv;
 211
 212     i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
 213     if (i != 0)
 214         goto cs_failed;
 215
 216     i = pcmcia_request_irq(link, &link->irq);
 217     if (i != 0) {
 218         link->irq.AssignedIRQ = 0;
 219         goto cs_failed;
 220     }
 221
 222     i = pcmcia_request_configuration(link, &link->conf);
 223     if (i != 0)
 224       goto cs_failed;
 225
 226     /* At this point, the dev_node_t structure(s) should be
 227        initialized and arranged in a linked list at link->dev. *//*  */
 228     sprintf(dev->node.dev_name, "teles");
 229     dev->node.major = dev->node.minor = 0x0;
 230
 231     link->dev_node = &dev->node;
 232
 233     /* Finally, report what we've done */
 234     printk(KERN_INFO "%s: index 0x%02x:",
 235            dev->node.dev_name, link->conf.ConfigIndex);
 236     if (link->conf.Attributes & CONF_ENABLE_IRQ)
 237         printk(", irq %d", link->irq.AssignedIRQ);
 238     if (link->io.NumPorts1)
 239         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 240                link->io.BasePort1+link->io.NumPorts1-1);
 241     if (link->io.NumPorts2)
 242         printk(" & 0x%04x-0x%04x", link->io.BasePort2,
 243                link->io.BasePort2+link->io.NumPorts2-1);
 244     printk("\n");
 245
 246     icard.para[0] = link->irq.AssignedIRQ;
 247     icard.para[1] = link->io.BasePort1;
 248     icard.protocol = protocol;
 249     icard.typ = ISDN_CTYPE_TELESPCMCIA;
 250
 251     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
 252     if (i < 0) {
 253         printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
 254                 i, link->io.BasePort1);
 255         teles_cs_release(link);
 256         return -ENODEV;
 257     }
 258
 259     ((local_info_t*)link->priv)->cardnr = i;
 260     return 0;
 261
 262 cs_failed:
 263     teles_cs_release(link);
 264     return -ENODEV;
 265 } /* teles_cs_config */
 266
 267 /*======================================================================
 268
 269     After a card is removed, teles_cs_release() will unregister the net
 270     device, and release the PCMCIA configuration.  If the device is
 271     still open, this will be postponed until it is closed.
 272
 273 ======================================================================*/
 274
 275 static void teles_cs_release(struct pcmcia_device *link)
 276 {
 277     local_info_t *local = link->priv;
 278
 279     dev_dbg(&link->dev, "teles_cs_release(0x%p)\n", link);
 280
 281     if (local) {
 282         if (local->cardnr >= 0) {
 283             /* no unregister function with hisax */
 284             HiSax_closecard(local->cardnr);
 285         }
 286     }
 287
 288     pcmcia_disable_device(link);
 289 } /* teles_cs_release */
 290
 291 static int teles_suspend(struct pcmcia_device *link)
 292 {
 293         local_info_t *dev = link->priv;
 294
 295         dev->busy = 1;
 296
 297         return 0;
 298 }
 299
 300 static int teles_resume(struct pcmcia_device *link)
 301 {
 302         local_info_t *dev = link->priv;
 303
 304         dev->busy = 0;
 305
 306         return 0;
 307 }
 308
 309
 310 static struct pcmcia_device_id teles_ids[] = {
 311         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
 312         PCMCIA_DEVICE_NULL,
 313 };
 314 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
 315
 316 static struct pcmcia_driver teles_cs_driver = {
 317         .owner          = THIS_MODULE,
 318         .drv            = {
 319                 .name   = "teles_cs",
 320         },
 321         .probe          = teles_probe,
 322         .remove         = teles_detach,
 323         .id_table       = teles_ids,
 324         .suspend        = teles_suspend,
 325         .resume         = teles_resume,
 326 };
 327
 328 static int __init init_teles_cs(void)
 329 {
 330         return pcmcia_register_driver(&teles_cs_driver);
 331 }
 332
 333 static void __exit exit_teles_cs(void)
 334 {
 335         pcmcia_unregister_driver(&teles_cs_driver);
 336 }
 337
 338 module_init(init_teles_cs);
 339 module_exit(exit_teles_cs);