drivers/parport/parport_cs.c

   1 /*======================================================================
   2
   3     A driver for PCMCIA parallel port adapters
   4
   5     (specifically, for the Quatech SPP-100 EPP card: other cards will
   6     probably require driver tweaks)
   7
   8     parport_cs.c 1.29 2002/10/11 06:57:41
   9
  10     The contents of this file are subject to the Mozilla Public
  11     License Version 1.1 (the "License"); you may not use this file
  12     except in compliance with the License. You may obtain a copy of
  13     the License at http://www.mozilla.org/MPL/
  14
  15     Software distributed under the License is distributed on an "AS
  16     IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  17     implied. See the License for the specific language governing
  18     rights and limitations under the License.
  19
  20     The initial developer of the original code is David A. Hinds
  21     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  22     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  23
  24     Alternatively, the contents of this file may be used under the
  25     terms of the GNU General Public License version 2 (the "GPL"), in
  26     which case the provisions of the GPL are applicable instead of the
  27     above.  If you wish to allow the use of your version of this file
  28     only under the terms of the GPL and not to allow others to use
  29     your version of this file under the MPL, indicate your decision
  30     by deleting the provisions above and replace them with the notice
  31     and other provisions required by the GPL.  If you do not delete
  32     the provisions above, a recipient may use your version of this
  33     file under either the MPL or the GPL.
  34
  35 ======================================================================*/
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/sched.h>
  41 #include <linux/ptrace.h>
  42 #include <linux/slab.h>
  43 #include <linux/string.h>
  44 #include <linux/timer.h>
  45 #include <linux/ioport.h>
  46 #include <linux/major.h>
  47
  48 #include <linux/parport.h>
  49 #include <linux/parport_pc.h>
  50
  51 #include <pcmcia/cs_types.h>
  52 #include <pcmcia/cs.h>
  53 #include <pcmcia/cistpl.h>
  54 #include <pcmcia/ds.h>
  55 #include <pcmcia/cisreg.h>
  56 #include <pcmcia/ciscode.h>
  57
  58 /*====================================================================*/
  59
  60 /* Module parameters */
  61
  62 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  63 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  64 MODULE_LICENSE("Dual MPL/GPL");
  65
  66 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  67
  68 INT_MODULE_PARM(epp_mode, 1);
  69
  70 #ifdef PCMCIA_DEBUG
  71 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
  72 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  73 static char *version =
  74 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
  75 #else
  76 #define DEBUG(n, args...)
  77 #endif
  78
  79 /*====================================================================*/
  80
  81 #define FORCE_EPP_MODE  0x08
  82
  83 typedef struct parport_info_t {
  84     dev_link_t          link;
  85     int                 ndev;
  86     dev_node_t          node;
  87     struct parport      *port;
  88 } parport_info_t;
  89
  90 static dev_link_t *parport_attach(void);
  91 static void parport_detach(dev_link_t *);
  92 static void parport_config(dev_link_t *link);
  93 static void parport_cs_release(dev_link_t *);
  94 static int parport_event(event_t event, int priority,
  95                          event_callback_args_t *args);
  96
  97 static dev_info_t dev_info = "parport_cs";
  98 static dev_link_t *dev_list = NULL;
  99
 100 /*======================================================================
 101
 102     parport_attach() creates an "instance" of the driver, allocating
 103     local data structures for one device.  The device is registered
 104     with Card Services.
 105
 106 ======================================================================*/
 107
 108 static dev_link_t *parport_attach(void)
 109 {
 110     parport_info_t *info;
 111     dev_link_t *link;
 112     client_reg_t client_reg;
 113     int ret;
 114
 115     DEBUG(0, "parport_attach()\n");
 116
 117     /* Create new parport device */
 118     info = kmalloc(sizeof(*info), GFP_KERNEL);
 119     if (!info) return NULL;
 120     memset(info, 0, sizeof(*info));
 121     link = &info->link; link->priv = info;
 122
 123     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 124     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 125     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 126     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 127     link->conf.Attributes = CONF_ENABLE_IRQ;
 128     link->conf.Vcc = 50;
 129     link->conf.IntType = INT_MEMORY_AND_IO;
 130
 131     /* Register with Card Services */
 132     link->next = dev_list;
 133     dev_list = link;
 134     client_reg.dev_info = &dev_info;
 135     client_reg.Version = 0x0210;
 136     client_reg.event_callback_args.client_data = link;
 137     ret = pcmcia_register_client(&link->handle, &client_reg);
 138     if (ret != CS_SUCCESS) {
 139         cs_error(link->handle, RegisterClient, ret);
 140         parport_detach(link);
 141         return NULL;
 142     }
 143
 144     return link;
 145 } /* parport_attach */
 146
 147 /*======================================================================
 148
 149     This deletes a driver "instance".  The device is de-registered
 150     with Card Services.  If it has been released, all local data
 151     structures are freed.  Otherwise, the structures will be freed
 152     when the device is released.
 153
 154 ======================================================================*/
 155
 156 static void parport_detach(dev_link_t *link)
 157 {
 158     dev_link_t **linkp;
 159     int ret;
 160
 161     DEBUG(0, "parport_detach(0x%p)\n", link);
 162
 163     /* Locate device structure */
 164     for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
 165         if (*linkp == link) break;
 166     if (*linkp == NULL)
 167         return;
 168
 169     if (link->state & DEV_CONFIG)
 170         parport_cs_release(link);
 171
 172     if (link->handle) {
 173         ret = pcmcia_deregister_client(link->handle);
 174         if (ret != CS_SUCCESS)
 175             cs_error(link->handle, DeregisterClient, ret);
 176     }
 177
 178     /* Unlink, free device structure */
 179     *linkp = link->next;
 180     kfree(link->priv);
 181
 182 } /* parport_detach */
 183
 184 /*======================================================================
 185
 186     parport_config() is scheduled to run after a CARD_INSERTION event
 187     is received, to configure the PCMCIA socket, and to make the
 188     parport device available to the system.
 189
 190 ======================================================================*/
 191
 192 #define CS_CHECK(fn, ret) \
 193 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 194
 195 void parport_config(dev_link_t *link)
 196 {
 197     client_handle_t handle = link->handle;
 198     parport_info_t *info = link->priv;
 199     tuple_t tuple;
 200     u_short buf[128];
 201     cisparse_t parse;
 202     config_info_t conf;
 203     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 204     cistpl_cftable_entry_t dflt = { 0 };
 205     struct parport *p;
 206     int last_ret, last_fn;
 207
 208     DEBUG(0, "parport_config(0x%p)\n", link);
 209
 210     tuple.TupleData = (cisdata_t *)buf;
 211     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 212     tuple.Attributes = 0;
 213     tuple.DesiredTuple = CISTPL_CONFIG;
 214     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 215     CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 216     CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 217     link->conf.ConfigBase = parse.config.base;
 218     link->conf.Present = parse.config.rmask[0];
 219
 220     /* Configure card */
 221     link->state |= DEV_CONFIG;
 222
 223     /* Not sure if this is right... look up the current Vcc */
 224     CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
 225
 226     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 227     tuple.Attributes = 0;
 228     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 229     while (1) {
 230         if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 231                 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 232             goto next_entry;
 233
 234         if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 235             cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 236             link->conf.ConfigIndex = cfg->index;
 237             if (epp_mode)
 238                 link->conf.ConfigIndex |= FORCE_EPP_MODE;
 239             link->io.BasePort1 = io->win[0].base;
 240             link->io.NumPorts1 = io->win[0].len;
 241             link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 242             if (io->nwin == 2) {
 243                 link->io.BasePort2 = io->win[1].base;
 244                 link->io.NumPorts2 = io->win[1].len;
 245             }
 246             if (pcmcia_request_io(link->handle, &link->io) != 0)
 247                 goto next_entry;
 248             /* If we've got this far, we're done */
 249             break;
 250         }
 251
 252     next_entry:
 253         if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 254         CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 255     }
 256
 257     CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
 258     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
 259
 260     release_region(link->io.BasePort1, link->io.NumPorts1);
 261     if (link->io.NumPorts2)
 262         release_region(link->io.BasePort2, link->io.NumPorts2);
 263     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 264                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 265                               NULL);
 266     if (p == NULL) {
 267         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 268                "0x%3x, irq %u failed\n", link->io.BasePort1,
 269                link->irq.AssignedIRQ);
 270         goto failed;
 271     }
 272
 273     p->modes |= PARPORT_MODE_PCSPP;
 274     if (epp_mode)
 275         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 276     info->ndev = 1;
 277     info->node.major = LP_MAJOR;
 278     info->node.minor = p->number;
 279     info->port = p;
 280     strcpy(info->node.dev_name, p->name);
 281     link->dev = &info->node;
 282
 283     link->state &= ~DEV_CONFIG_PENDING;
 284     return;
 285
 286 cs_failed:
 287     cs_error(link->handle, last_fn, last_ret);
 288 failed:
 289     parport_cs_release(link);
 290     link->state &= ~DEV_CONFIG_PENDING;
 291
 292 } /* parport_config */
 293
 294 /*======================================================================
 295
 296     After a card is removed, parport_cs_release() will unregister the
 297     device, and release the PCMCIA configuration.  If the device is
 298     still open, this will be postponed until it is closed.
 299
 300 ======================================================================*/
 301
 302 void parport_cs_release(dev_link_t *link)
 303 {
 304     parport_info_t *info = link->priv;
 305
 306     DEBUG(0, "parport_release(0x%p)\n", link);
 307
 308     if (info->ndev) {
 309         struct parport *p = info->port;
 310         parport_pc_unregister_port(p);
 311         request_region(link->io.BasePort1, link->io.NumPorts1,
 312                        info->node.dev_name);
 313         if (link->io.NumPorts2)
 314             request_region(link->io.BasePort2, link->io.NumPorts2,
 315                            info->node.dev_name);
 316     }
 317     info->ndev = 0;
 318     link->dev = NULL;
 319
 320     pcmcia_release_configuration(link->handle);
 321     pcmcia_release_io(link->handle, &link->io);
 322     pcmcia_release_irq(link->handle, &link->irq);
 323
 324     link->state &= ~DEV_CONFIG;
 325
 326 } /* parport_cs_release */
 327
 328 /*======================================================================
 329
 330     The card status event handler.  Mostly, this schedules other
 331     stuff to run after an event is received.
 332
 333 ======================================================================*/
 334
 335 int parport_event(event_t event, int priority,
 336                   event_callback_args_t *args)
 337 {
 338     dev_link_t *link = args->client_data;
 339
 340     DEBUG(1, "parport_event(0x%06x)\n", event);
 341
 342     switch (event) {
 343     case CS_EVENT_CARD_REMOVAL:
 344         link->state &= ~DEV_PRESENT;
 345         if (link->state & DEV_CONFIG)
 346                 parport_cs_release(link);
 347         break;
 348     case CS_EVENT_CARD_INSERTION:
 349         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 350         parport_config(link);
 351         break;
 352     case CS_EVENT_PM_SUSPEND:
 353         link->state |= DEV_SUSPEND;
 354         /* Fall through... */
 355     case CS_EVENT_RESET_PHYSICAL:
 356         if (link->state & DEV_CONFIG)
 357             pcmcia_release_configuration(link->handle);
 358         break;
 359     case CS_EVENT_PM_RESUME:
 360         link->state &= ~DEV_SUSPEND;
 361         /* Fall through... */
 362     case CS_EVENT_CARD_RESET:
 363         if (DEV_OK(link))
 364             pcmcia_request_configuration(link->handle, &link->conf);
 365         break;
 366     }
 367     return 0;
 368 } /* parport_event */
 369
 370 static struct pcmcia_device_id parport_ids[] = {
 371         PCMCIA_DEVICE_FUNC_ID(3),
 372         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 373         PCMCIA_DEVICE_NULL
 374 };
 375 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 376
 377 static struct pcmcia_driver parport_cs_driver = {
 378         .owner          = THIS_MODULE,
 379         .drv            = {
 380                 .name   = "parport_cs",
 381         },
 382         .attach         = parport_attach,
 383         .event          = parport_event,
 384         .detach         = parport_detach,
 385         .id_table       = parport_ids,
 386
 387 };
 388
 389 static int __init init_parport_cs(void)
 390 {
 391         return pcmcia_register_driver(&parport_cs_driver);
 392 }
 393
 394 static void __exit exit_parport_cs(void)
 395 {
 396         pcmcia_unregister_driver(&parport_cs_driver);
 397         BUG_ON(dev_list != NULL);
 398 }
 399
 400 module_init(init_parport_cs);
 401 module_exit(exit_parport_cs);