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