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_param(pc_debug, int, 0644);
  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.EventMask =
  73             CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
  74             CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
  75             CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
  76         client_reg.event_handler = &ixj_event;
  77         client_reg.Version = 0x0210;
  78         client_reg.event_callback_args.client_data = link;
  79         ret = pcmcia_register_client(&link->handle, &client_reg);
  80         if (ret != CS_SUCCESS) {
  81                 cs_error(link->handle, RegisterClient, ret);
  82                 ixj_detach(link);
  83                 return NULL;
  84         }
  85         return link;
  86 }
  87
  88 static void ixj_detach(dev_link_t * link)
  89 {
  90         dev_link_t **linkp;
  91         int ret;
  92         DEBUG(0, "ixj_detach(0x%p)\n", link);
  93         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
  94                 if (*linkp == link)
  95                         break;
  96         if (*linkp == NULL)
  97                 return;
  98         link->state &= ~DEV_RELEASE_PENDING;
  99         if (link->state & DEV_CONFIG)
 100                 ixj_cs_release(link);
 101         if (link->handle) {
 102                 ret = pcmcia_deregister_client(link->handle);
 103                 if (ret != CS_SUCCESS)
 104                         cs_error(link->handle, DeregisterClient, ret);
 105         }
 106         /* Unlink device structure, free bits */
 107         *linkp = link->next;
 108         kfree(link->priv);
 109         kfree(link);
 110 }
 111
 112 #define CS_CHECK(fn, ret) \
 113 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 114
 115 static void ixj_get_serial(dev_link_t * link, IXJ * j)
 116 {
 117         client_handle_t handle;
 118         tuple_t tuple;
 119         u_short buf[128];
 120         char *str;
 121         int last_ret, last_fn, i, place;
 122         handle = link->handle;
 123         DEBUG(0, "ixj_get_serial(0x%p)\n", link);
 124         tuple.TupleData = (cisdata_t *) buf;
 125         tuple.TupleOffset = 0;
 126         tuple.TupleDataMax = 80;
 127         tuple.Attributes = 0;
 128         tuple.DesiredTuple = CISTPL_VERS_1;
 129         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 130         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 131         str = (char *) buf;
 132         printk("PCMCIA Version %d.%d\n", str[0], str[1]);
 133         str += 2;
 134         printk("%s", str);
 135         str = str + strlen(str) + 1;
 136         printk(" %s", str);
 137         str = str + strlen(str) + 1;
 138         place = 1;
 139         for (i = strlen(str) - 1; i >= 0; i--) {
 140                 switch (str[i]) {
 141                 case '0':
 142                 case '1':
 143                 case '2':
 144                 case '3':
 145                 case '4':
 146                 case '5':
 147                 case '6':
 148                 case '7':
 149                 case '8':
 150                 case '9':
 151                         j->serial += (str[i] - 48) * place;
 152                         break;
 153                 case 'A':
 154                 case 'B':
 155                 case 'C':
 156                 case 'D':
 157                 case 'E':
 158                 case 'F':
 159                         j->serial += (str[i] - 55) * place;
 160                         break;
 161                 case 'a':
 162                 case 'b':
 163                 case 'c':
 164                 case 'd':
 165                 case 'e':
 166                 case 'f':
 167                         j->serial += (str[i] - 87) * place;
 168                         break;
 169                 }
 170                 place = place * 0x10;
 171         }
 172         str = str + strlen(str) + 1;
 173         printk(" version %s\n", str);
 174       cs_failed:
 175         return;
 176 }
 177
 178 static void ixj_config(dev_link_t * link)
 179 {
 180         IXJ *j;
 181         client_handle_t handle;
 182         ixj_info_t *info;
 183         tuple_t tuple;
 184         u_short buf[128];
 185         cisparse_t parse;
 186         config_info_t conf;
 187         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 188         cistpl_cftable_entry_t dflt =
 189         {
 190                 0
 191         };
 192         int last_ret, last_fn;
 193         handle = link->handle;
 194         info = link->priv;
 195         DEBUG(0, "ixj_config(0x%p)\n", link);
 196         tuple.TupleData = (cisdata_t *) buf;
 197         tuple.TupleOffset = 0;
 198         tuple.TupleDataMax = 255;
 199         tuple.Attributes = 0;
 200         tuple.DesiredTuple = CISTPL_CONFIG;
 201         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 202         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 203         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 204         link->conf.ConfigBase = parse.config.base;
 205         link->conf.Present = parse.config.rmask[0];
 206         link->state |= DEV_CONFIG;
 207         CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
 208         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 209         tuple.Attributes = 0;
 210         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 211         while (1) {
 212                 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 213                                 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 214                         goto next_entry;
 215                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 216                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 217                         link->conf.ConfigIndex = cfg->index;
 218                         link->io.BasePort1 = io->win[0].base;
 219                         link->io.NumPorts1 = io->win[0].len;
 220                         if (io->nwin == 2) {
 221                                 link->io.BasePort2 = io->win[1].base;
 222                                 link->io.NumPorts2 = io->win[1].len;
 223                         }
 224                         if (pcmcia_request_io(link->handle, &link->io) != 0)
 225                                 goto next_entry;
 226                         /* If we've got this far, we're done */
 227                         break;
 228                 }
 229               next_entry:
 230                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 231                         dflt = *cfg;
 232                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 233         }
 234
 235         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
 236
 237         /*
 238          *      Register the card with the core.
 239          */
 240         j=ixj_pcmcia_probe(link->io.BasePort1,link->io.BasePort1 + 0x10);
 241
 242         info->ndev = 1;
 243         info->node.major = PHONE_MAJOR;
 244         link->dev = &info->node;
 245         ixj_get_serial(link, j);
 246         link->state &= ~DEV_CONFIG_PENDING;
 247         return;
 248       cs_failed:
 249         cs_error(link->handle, last_fn, last_ret);
 250         ixj_cs_release(link);
 251 }
 252
 253 static void ixj_cs_release(dev_link_t *link)
 254 {
 255         ixj_info_t *info = link->priv;
 256         DEBUG(0, "ixj_cs_release(0x%p)\n", link);
 257         info->ndev = 0;
 258         link->dev = NULL;
 259         pcmcia_release_configuration(link->handle);
 260         pcmcia_release_io(link->handle, &link->io);
 261         link->state &= ~DEV_CONFIG;
 262 }
 263
 264 static int ixj_event(event_t event, int priority, event_callback_args_t * args)
 265 {
 266         dev_link_t *link = args->client_data;
 267         DEBUG(1, "ixj_event(0x%06x)\n", event);
 268         switch (event) {
 269         case CS_EVENT_CARD_REMOVAL:
 270                 link->state &= ~DEV_PRESENT;
 271                 if (link->state & DEV_CONFIG) {
 272                         link->state |= DEV_RELEASE_PENDING;
 273                         ixj_cs_release(link);
 274                 }
 275                 break;
 276         case CS_EVENT_CARD_INSERTION:
 277                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 278                 ixj_config(link);
 279                 break;
 280         case CS_EVENT_PM_SUSPEND:
 281                 link->state |= DEV_SUSPEND;
 282                 /* Fall through... */
 283         case CS_EVENT_RESET_PHYSICAL:
 284                 if (link->state & DEV_CONFIG)
 285                         pcmcia_release_configuration(link->handle);
 286                 break;
 287         case CS_EVENT_PM_RESUME:
 288                 link->state &= ~DEV_SUSPEND;
 289                 /* Fall through... */
 290         case CS_EVENT_CARD_RESET:
 291                 if (DEV_OK(link))
 292                         pcmcia_request_configuration(link->handle, &link->conf);
 293                 break;
 294         }
 295         return 0;
 296 }
 297
 298 static struct pcmcia_driver ixj_driver = {
 299         .owner          = THIS_MODULE,
 300         .drv            = {
 301                 .name   = "ixj_cs",
 302         },
 303         .attach         = ixj_attach,
 304         .detach         = ixj_detach,
 305 };
 306
 307 static int __init ixj_pcmcia_init(void)
 308 {
 309         return pcmcia_register_driver(&ixj_driver);
 310 }
 311
 312 static void ixj_pcmcia_exit(void)
 313 {
 314         pcmcia_unregister_driver(&ixj_driver);
 315         BUG_ON(dev_list != NULL);
 316 }
 317
 318 module_init(ixj_pcmcia_init);
 319 module_exit(ixj_pcmcia_exit);
 320
 321 MODULE_LICENSE("GPL");