drivers/telephony/ixj_pcmcia.c

   1 #include "ixj-ver.h"
   2
   3 #include <linux/module.h>
   4
   5 #include <linux/init.h>
   6 #include <linux/sched.h>
   7 #include <linux/kernel.h>       /* printk() */
   8 #include <linux/fs.h>           /* everything... */
   9 #include <linux/errno.h>        /* error codes */
  10 #include <linux/slab.h>
  11
  12 #include <pcmcia/version.h>
  13 #include <pcmcia/cs_types.h>
  14 #include <pcmcia/cs.h>
  15 #include <pcmcia/cistpl.h>
  16 #include <pcmcia/ds.h>
  17
  18 #include "ixj.h"
  19
  20 /*
  21  *      PCMCIA service support for Quicknet cards
  22  */
  23
  24 #ifdef PCMCIA_DEBUG
  25 static int pc_debug = PCMCIA_DEBUG;
  26 MODULE_PARM(pc_debug, "i");
  27 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  28 #else
  29 #define DEBUG(n, args...)
  30 #endif
  31
  32 typedef struct ixj_info_t {
  33         int ndev;
  34         dev_node_t node;
  35         struct ixj *port;
  36 } ixj_info_t;
  37
  38 static dev_link_t *ixj_attach(void);
  39 static void ixj_detach(dev_link_t *);
  40 static void ixj_config(dev_link_t * link);
  41 static void ixj_cs_release(dev_link_t * link);
  42 static int ixj_event(event_t event, int priority, event_callback_args_t * args);
  43 static dev_info_t dev_info = "ixj_cs";
  44 static dev_link_t *dev_list = NULL;
  45
  46 static dev_link_t *ixj_attach(void)
  47 {
  48         client_reg_t client_reg;
  49         dev_link_t *link;
  50         int ret;
  51         DEBUG(0, "ixj_attach()\n");
  52         /* Create new ixj device */
  53         link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
  54         if (!link)
  55                 return NULL;
  56         memset(link, 0, sizeof(struct dev_link_t));
  57         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
  58         link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
  59         link->io.IOAddrLines = 3;
  60         link->conf.Vcc = 50;
  61         link->conf.IntType = INT_MEMORY_AND_IO;
  62         link->priv = kmalloc(sizeof(struct ixj_info_t), GFP_KERNEL);
  63         if (!link->priv) {
  64                 kfree(link);
  65                 return NULL;
  66         }
  67         memset(link->priv, 0, sizeof(struct ixj_info_t));
  68         /* Register with Card Services */
  69         link->next = dev_list;
  70         dev_list = link;
  71         client_reg.dev_info = &dev_info;
  72         client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
  73         client_reg.EventMask =
  74             CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
  75             CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
  76             CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
  77         client_reg.event_handler = &ixj_event;
  78         client_reg.Version = 0x0210;
  79         client_reg.event_callback_args.client_data = link;
  80         ret = pcmcia_register_client(&link->handle, &client_reg);
  81         if (ret != CS_SUCCESS) {
  82                 cs_error(link->handle, RegisterClient, ret);
  83                 ixj_detach(link);
  84                 return NULL;
  85         }
  86         return link;
  87 }
  88
  89 static void ixj_detach(dev_link_t * link)
  90 {
  91         dev_link_t **linkp;
  92         int ret;
  93         DEBUG(0, "ixj_detach(0x%p)\n", link);
  94         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
  95                 if (*linkp == link)
  96                         break;
  97         if (*linkp == NULL)
  98                 return;
  99         link->state &= ~DEV_RELEASE_PENDING;
 100         if (link->state & DEV_CONFIG)
 101                 ixj_cs_release(link);
 102         if (link->handle) {
 103                 ret = pcmcia_deregister_client(link->handle);
 104                 if (ret != CS_SUCCESS)
 105                         cs_error(link->handle, DeregisterClient, ret);
 106         }
 107         /* Unlink device structure, free bits */
 108         *linkp = link->next;
 109         kfree(link->priv);
 110         kfree(link);
 111 }
 112
 113 #define CS_CHECK(fn, ret) \
 114 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 115
 116 static void ixj_get_serial(dev_link_t * link, IXJ * j)
 117 {
 118         client_handle_t handle;
 119         tuple_t tuple;
 120         u_short buf[128];
 121         char *str;
 122         int last_ret, last_fn, i, place;
 123         handle = link->handle;
 124         DEBUG(0, "ixj_get_serial(0x%p)\n", link);
 125         tuple.TupleData = (cisdata_t *) buf;
 126         tuple.TupleOffset = 0;
 127         tuple.TupleDataMax = 80;
 128         tuple.Attributes = 0;
 129         tuple.DesiredTuple = CISTPL_VERS_1;
 130         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 131         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 132         str = (char *) buf;
 133         printk("PCMCIA Version %d.%d\n", str[0], str[1]);
 134         str += 2;
 135         printk("%s", str);
 136         str = str + strlen(str) + 1;
 137         printk(" %s", str);
 138         str = str + strlen(str) + 1;
 139         place = 1;
 140         for (i = strlen(str) - 1; i >= 0; i--) {
 141                 switch (str[i]) {
 142                 case '0':
 143                 case '1':
 144                 case '2':
 145                 case '3':
 146                 case '4':
 147                 case '5':
 148                 case '6':
 149                 case '7':
 150                 case '8':
 151                 case '9':
 152                         j->serial += (str[i] - 48) * place;
 153                         break;
 154                 case 'A':
 155                 case 'B':
 156                 case 'C':
 157                 case 'D':
 158                 case 'E':
 159                 case 'F':
 160                         j->serial += (str[i] - 55) * place;
 161                         break;
 162                 case 'a':
 163                 case 'b':
 164                 case 'c':
 165                 case 'd':
 166                 case 'e':
 167                 case 'f':
 168                         j->serial += (str[i] - 87) * place;
 169                         break;
 170                 }
 171                 place = place * 0x10;
 172         }
 173         str = str + strlen(str) + 1;
 174         printk(" version %s\n", str);
 175       cs_failed:
 176         return;
 177 }
 178
 179 static void ixj_config(dev_link_t * link)
 180 {
 181         IXJ *j;
 182         client_handle_t handle;
 183         ixj_info_t *info;
 184         tuple_t tuple;
 185         u_short buf[128];
 186         cisparse_t parse;
 187         config_info_t conf;
 188         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 189         cistpl_cftable_entry_t dflt =
 190         {
 191                 0
 192         };
 193         int last_ret, last_fn;
 194         handle = link->handle;
 195         info = link->priv;
 196         DEBUG(0, "ixj_config(0x%p)\n", link);
 197         tuple.TupleData = (cisdata_t *) buf;
 198         tuple.TupleOffset = 0;
 199         tuple.TupleDataMax = 255;
 200         tuple.Attributes = 0;
 201         tuple.DesiredTuple = CISTPL_CONFIG;
 202         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 203         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 204         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 205         link->conf.ConfigBase = parse.config.base;
 206         link->conf.Present = parse.config.rmask[0];
 207         link->state |= DEV_CONFIG;
 208         CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
 209         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 210         tuple.Attributes = 0;
 211         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 212         while (1) {
 213                 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 214                                 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 215                         goto next_entry;
 216                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 217                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 218                         link->conf.ConfigIndex = cfg->index;
 219                         link->io.BasePort1 = io->win[0].base;
 220                         link->io.NumPorts1 = io->win[0].len;
 221                         if (io->nwin == 2) {
 222                                 link->io.BasePort2 = io->win[1].base;
 223                                 link->io.NumPorts2 = io->win[1].len;
 224                         }
 225                         if (pcmcia_request_io(link->handle, &link->io) != 0)
 226                                 goto next_entry;
 227                         /* If we've got this far, we're done */
 228                         break;
 229                 }
 230               next_entry:
 231                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 232                         dflt = *cfg;
 233                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 234         }
 235
 236         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
 237
 238         /*
 239          *      Register the card with the core.
 240          */
 241         j=ixj_pcmcia_probe(link->io.BasePort1,link->io.BasePort1 + 0x10);
 242
 243         info->ndev = 1;
 244         info->node.major = PHONE_MAJOR;
 245         link->dev = &info->node;
 246         ixj_get_serial(link, j);
 247         link->state &= ~DEV_CONFIG_PENDING;
 248         return;
 249       cs_failed:
 250         cs_error(link->handle, last_fn, last_ret);
 251         ixj_cs_release(link);
 252 }
 253
 254 static void ixj_cs_release(dev_link_t *link)
 255 {
 256         ixj_info_t *info = link->priv;
 257         DEBUG(0, "ixj_cs_release(0x%p)\n", link);
 258         info->ndev = 0;
 259         link->dev = NULL;
 260         pcmcia_release_configuration(link->handle);
 261         pcmcia_release_io(link->handle, &link->io);
 262         link->state &= ~DEV_CONFIG;
 263 }
 264
 265 static int ixj_event(event_t event, int priority, event_callback_args_t * args)
 266 {
 267         dev_link_t *link = args->client_data;
 268         DEBUG(1, "ixj_event(0x%06x)\n", event);
 269         switch (event) {
 270         case CS_EVENT_CARD_REMOVAL:
 271                 link->state &= ~DEV_PRESENT;
 272                 if (link->state & DEV_CONFIG) {
 273                         link->state |= DEV_RELEASE_PENDING;
 274                         ixj_cs_release(link);
 275                 }
 276                 break;
 277         case CS_EVENT_CARD_INSERTION:
 278                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 279                 ixj_config(link);
 280                 break;
 281         case CS_EVENT_PM_SUSPEND:
 282                 link->state |= DEV_SUSPEND;
 283                 /* Fall through... */
 284         case CS_EVENT_RESET_PHYSICAL:
 285                 if (link->state & DEV_CONFIG)
 286                         pcmcia_release_configuration(link->handle);
 287                 break;
 288         case CS_EVENT_PM_RESUME:
 289                 link->state &= ~DEV_SUSPEND;
 290                 /* Fall through... */
 291         case CS_EVENT_CARD_RESET:
 292                 if (DEV_OK(link))
 293                         pcmcia_request_configuration(link->handle, &link->conf);
 294                 break;
 295         }
 296         return 0;
 297 }
 298
 299 static struct pcmcia_driver ixj_driver = {
 300         .owner          = THIS_MODULE,
 301         .drv            = {
 302                 .name   = "ixj_cs",
 303         },
 304         .attach         = ixj_attach,
 305         .detach         = ixj_detach,
 306 };
 307
 308 static int __init ixj_pcmcia_init(void)
 309 {
 310         return pcmcia_register_driver(&ixj_driver);
 311 }
 312
 313 static void ixj_pcmcia_exit(void)
 314 {
 315         pcmcia_unregister_driver(&ixj_driver);
 316
 317         /* XXX: this really needs to move into generic code.. */
 318         while (dev_list != NULL)
 319                 ixj_detach(dev_list);
 320 }
 321
 322 module_init(ixj_pcmcia_init);
 323 module_exit(ixj_pcmcia_exit);
 324
 325 MODULE_LICENSE("GPL");