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     /* The io structure describes IO port mapping */
  80     p_dev->resource[0]->end = 16;
  81     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
  82     p_dev->resource[1]->end = 16;
  83     p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
  84
  85     /* General socket configuration */
  86     p_dev->config_flags |= CONF_ENABLE_IRQ;
  87     p_dev->config_index = 1;
  88     p_dev->config_regs = PRESENT_OPTION;
  89
  90     return avma1cs_config(p_dev);
  91 } /* avma1cs_attach */
  92
  93 /*======================================================================
  94
  95     This deletes a driver "instance".  The device is de-registered
  96     with Card Services.  If it has been released, all local data
  97     structures are freed.  Otherwise, the structures will be freed
  98     when the device is released.
  99
 100 ======================================================================*/
 101
 102 static void __devexit avma1cs_detach(struct pcmcia_device *link)
 103 {
 104         dev_dbg(&link->dev, "avma1cs_detach(0x%p)\n", link);
 105         avma1cs_release(link);
 106         kfree(link->priv);
 107 } /* avma1cs_detach */
 108
 109 /*======================================================================
 110
 111     avma1cs_config() is scheduled to run after a CARD_INSERTION event
 112     is received, to configure the PCMCIA socket, and to make the
 113     ethernet device available to the system.
 114
 115 ======================================================================*/
 116
 117 static int avma1cs_configcheck(struct pcmcia_device *p_dev,
 118                                cistpl_cftable_entry_t *cf,
 119                                cistpl_cftable_entry_t *dflt,
 120                                unsigned int vcc,
 121                                void *priv_data)
 122 {
 123         if (cf->io.nwin <= 0)
 124                 return -ENODEV;
 125
 126         p_dev->resource[0]->start = cf->io.win[0].base;
 127         p_dev->resource[0]->end = cf->io.win[0].len;
 128         p_dev->io_lines = 5;
 129         return pcmcia_request_io(p_dev);
 130 }
 131
 132
 133 static int __devinit avma1cs_config(struct pcmcia_device *link)
 134 {
 135     int i = -1;
 136     char devname[128];
 137     IsdnCard_t  icard;
 138     int busy = 0;
 139
 140     dev_dbg(&link->dev, "avma1cs_config(0x%p)\n", link);
 141
 142     devname[0] = 0;
 143     if (link->prod_id[1])
 144             strlcpy(devname, link->prod_id[1], sizeof(devname));
 145
 146     if (pcmcia_loop_config(link, avma1cs_configcheck, NULL))
 147             return -ENODEV;
 148
 149     do {
 150         /*
 151          * allocate an interrupt line
 152          */
 153         if (!link->irq) {
 154             /* undo */
 155             pcmcia_disable_device(link);
 156             break;
 157         }
 158
 159         /*
 160          * configure the PCMCIA socket
 161          */
 162         i = pcmcia_enable_device(link);
 163         if (i != 0) {
 164             pcmcia_disable_device(link);
 165             break;
 166         }
 167
 168     } while (0);
 169
 170     /* If any step failed, release any partially configured state */
 171     if (i != 0) {
 172         avma1cs_release(link);
 173         return -ENODEV;
 174     }
 175
 176     printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
 177                 (unsigned int) link->resource[0]->start, link->irq);
 178
 179     icard.para[0] = link->irq;
 180     icard.para[1] = link->resource[0]->start;
 181     icard.protocol = isdnprot;
 182     icard.typ = ISDN_CTYPE_A1_PCMCIA;
 183
 184     i = hisax_init_pcmcia(link, &busy, &icard);
 185     if (i < 0) {
 186         printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 "
 187                         "PCMCIA %d at i/o %#x\n", i,
 188                         (unsigned int) link->resource[0]->start);
 189         avma1cs_release(link);
 190         return -ENODEV;
 191     }
 192     link->priv = (void *) (unsigned long) i;
 193
 194     return 0;
 195 } /* avma1cs_config */
 196
 197 /*======================================================================
 198
 199     After a card is removed, avma1cs_release() will unregister the net
 200     device, and release the PCMCIA configuration.  If the device is
 201     still open, this will be postponed until it is closed.
 202
 203 ======================================================================*/
 204
 205 static void avma1cs_release(struct pcmcia_device *link)
 206 {
 207         unsigned long minor = (unsigned long) link->priv;
 208
 209         dev_dbg(&link->dev, "avma1cs_release(0x%p)\n", link);
 210
 211         /* now unregister function with hisax */
 212         HiSax_closecard(minor);
 213
 214         pcmcia_disable_device(link);
 215 } /* avma1cs_release */
 216
 217
 218 static struct pcmcia_device_id avma1cs_ids[] = {
 219         PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
 220         PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
 221         PCMCIA_DEVICE_NULL
 222 };
 223 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
 224
 225 static struct pcmcia_driver avma1cs_driver = {
 226         .owner          = THIS_MODULE,
 227         .drv            = {
 228                 .name   = "avma1_cs",
 229         },
 230         .probe          = avma1cs_probe,
 231         .remove         = __devexit_p(avma1cs_detach),
 232         .id_table       = avma1cs_ids,
 233 };
 234
 235 /*====================================================================*/
 236
 237 static int __init init_avma1_cs(void)
 238 {
 239         return(pcmcia_register_driver(&avma1cs_driver));
 240 }
 241
 242 static void __exit exit_avma1_cs(void)
 243 {
 244         pcmcia_unregister_driver(&avma1cs_driver);
 245 }
 246
 247 module_init(init_avma1_cs);
 248 module_exit(exit_avma1_cs);