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.h>
  24 #include <pcmcia/cistpl.h>
  25 #include <pcmcia/ds.h>
  26 #include "hisax_cfg.h"
  27
  28 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
  29 MODULE_AUTHOR("Carsten Paeth");
  30 MODULE_LICENSE("GPL");
  31
  32
  33 /*====================================================================*/
  34
  35 /* Parameters that can be set with 'insmod' */
  36
  37 static int isdnprot = 2;
  38
  39 module_param(isdnprot, int, 0);
  40
  41 /*====================================================================*/
  42
  43 /*
  44    The event() function is this driver's Card Services event handler.
  45    It will be called by Card Services when an appropriate card status
  46    event is received.  The config() and release() entry points are
  47    used to configure or release a socket, in response to card insertion
  48    and ejection events.  They are invoked from the skeleton event
  49    handler.
  50 */
  51
  52 static int avma1cs_config(struct pcmcia_device *link) __devinit ;
  53 static void avma1cs_release(struct pcmcia_device *link);
  54
  55 /*
  56    The attach() and detach() entry points are used to create and destroy
  57    "instances" of the driver, where each instance represents everything
  58    needed to manage one actual PCMCIA card.
  59 */
  60
  61 static void avma1cs_detach(struct pcmcia_device *p_dev) __devexit ;
  62
  63
  64 /*======================================================================
  65
  66     avma1cs_attach() creates an "instance" of the driver, allocating
  67     local data structures for one device.  The device is registered
  68     with Card Services.
  69
  70     The dev_link structure is initialized, but we don't actually
  71     configure the card at this point -- we wait until we receive a
  72     card insertion event.
  73
  74 ======================================================================*/
  75
  76 static int __devinit avma1cs_probe(struct pcmcia_device *p_dev)
  77 {
  78     dev_dbg(&p_dev->dev, "avma1cs_attach()\n");
  79
  80     /* The io structure describes IO port mapping */
  81     p_dev->resource[0]->end = 16;
  82     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
  83     p_dev->resource[1]->end = 16;
  84     p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
  85
  86     /* General socket configuration */
  87     p_dev->conf.Attributes = CONF_ENABLE_IRQ;
  88     p_dev->conf.IntType = INT_MEMORY_AND_IO;
  89     p_dev->conf.ConfigIndex = 1;
  90     p_dev->conf.Present = PRESENT_OPTION;
  91
  92     return avma1cs_config(p_dev);
  93 } /* avma1cs_attach */
  94
  95 /*======================================================================
  96
  97     This deletes a driver "instance".  The device is de-registered
  98     with Card Services.  If it has been released, all local data
  99     structures are freed.  Otherwise, the structures will be freed
 100     when the device is released.
 101
 102 ======================================================================*/
 103
 104 static void __devexit avma1cs_detach(struct pcmcia_device *link)
 105 {
 106         dev_dbg(&link->dev, "avma1cs_detach(0x%p)\n", link);
 107         avma1cs_release(link);
 108         kfree(link->priv);
 109 } /* avma1cs_detach */
 110
 111 /*======================================================================
 112
 113     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 114     is received, to configure the PCMCIA socket, and to make the
 115     ethernet device available to the system.
 116
 117 ======================================================================*/
 118
 119 static int avma1cs_configcheck(struct pcmcia_device *p_dev,
 120                                cistpl_cftable_entry_t *cf,
 121                                cistpl_cftable_entry_t *dflt,
 122                                unsigned int vcc,
 123                                void *priv_data)
 124 {
 125         if (cf->io.nwin <= 0)
 126                 return -ENODEV;
 127
 128         p_dev->resource[0]->start = cf->io.win[0].base;
 129         p_dev->resource[0]->end = cf->io.win[0].len;
 130         p_dev->io_lines = 5;
 131         return pcmcia_request_io(p_dev);
 132 }
 133
 134
 135 static int __devinit avma1cs_config(struct pcmcia_device *link)
 136 {
 137     int i = -1;
 138     char devname[128];
 139     IsdnCard_t  icard;
 140     int busy = 0;
 141
 142     dev_dbg(&link->dev, "avma1cs_config(0x%p)\n", link);
 143
 144     devname[0] = 0;
 145     if (link->prod_id[1])
 146             strlcpy(devname, link->prod_id[1], sizeof(devname));
 147
 148     if (pcmcia_loop_config(link, avma1cs_configcheck, NULL))
 149             return -ENODEV;
 150
 151     do {
 152         /*
 153          * allocate an interrupt line
 154          */
 155         if (!link->irq) {
 156             /* undo */
 157             pcmcia_disable_device(link);
 158             break;
 159         }
 160
 161         /*
 162          * configure the PCMCIA socket
 163          */
 164         i = pcmcia_request_configuration(link, &link->conf);
 165         if (i != 0) {
 166             pcmcia_disable_device(link);
 167             break;
 168         }
 169
 170     } while (0);
 171
 172     /* If any step failed, release any partially configured state */
 173     if (i != 0) {
 174         avma1cs_release(link);
 175         return -ENODEV;
 176     }
 177
 178     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 179                 (unsigned int) link->resource[0]->start, link->irq);
 180
 181     icard.para[0] = link->irq;
 182     icard.para[1] = link->resource[0]->start;
 183     icard.protocol = isdnprot;
 184     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 185
 186     i = hisax_init_pcmcia(link, &busy, &icard);
 187     if (i < 0) {
 188         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 "
 189                         "PCMCIA %d at i/o %#x\n", i,
 190                         (unsigned int) link->resource[0]->start);
 191         avma1cs_release(link);
 192         return -ENODEV;
 193     }
 194     link->priv = (void *) (unsigned long) i;
 195
 196     return 0;
 197 } /* avma1cs_config */
 198
 199 /*======================================================================
 200
 201     After a card is removed, avma1cs_release() will unregister the net
 202     device, and release the PCMCIA configuration.  If the device is
 203     still open, this will be postponed until it is closed.
 204
 205 ======================================================================*/
 206
 207 static void avma1cs_release(struct pcmcia_device *link)
 208 {
 209         unsigned long minor = (unsigned long) link->priv;
 210
 211         dev_dbg(&link->dev, "avma1cs_release(0x%p)\n", link);
 212
 213         /* now unregister function with hisax */
 214         HiSax_closecard(minor);
 215
 216         pcmcia_disable_device(link);
 217 } /* avma1cs_release */
 218
 219
 220 static struct pcmcia_device_id avma1cs_ids[] = {
 221         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 222         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 223         PCMCIA_DEVICE_NULL
 224 };
 225 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 226
 227 static struct pcmcia_driver avma1cs_driver = {
 228         .owner          = THIS_MODULE,
 229         .drv            = {
 230                 .name   = "avma1_cs",
 231         },
 232         .probe          = avma1cs_probe,
 233         .remove         = __devexit_p(avma1cs_detach),
 234         .id_table       = avma1cs_ids,
 235 };
 236
 237 /*====================================================================*/
 238
 239 static int __init init_avma1_cs(void)
 240 {
 241         return(pcmcia_register_driver(&avma1cs_driver));
 242 }
 243
 244 static void __exit exit_avma1_cs(void)
 245 {
 246         pcmcia_unregister_driver(&avma1cs_driver);
 247 }
 248
 249 module_init(init_avma1_cs);
 250 module_exit(exit_avma1_cs);