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 void parport_detach(struct pcmcia_device *p_dev);
  91 static void parport_config(dev_link_t *link);
  92 static void parport_cs_release(dev_link_t *);
  93
  94 /*======================================================================
  95
  96     parport_attach() creates an "instance" of the driver, allocating
  97     local data structures for one device.  The device is registered
  98     with Card Services.
  99
 100 ======================================================================*/
 101
 102 static int parport_attach(struct pcmcia_device *p_dev)
 103 {
 104     parport_info_t *info;
 105     dev_link_t *link;
 106
 107     DEBUG(0, "parport_attach()\n");
 108
 109     /* Create new parport device */
 110     info = kmalloc(sizeof(*info), GFP_KERNEL);
 111     if (!info) return -ENOMEM;
 112     memset(info, 0, sizeof(*info));
 113     link = &info->link; link->priv = info;
 114
 115     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 116     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 117     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 118     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 119     link->conf.Attributes = CONF_ENABLE_IRQ;
 120     link->conf.Vcc = 50;
 121     link->conf.IntType = INT_MEMORY_AND_IO;
 122
 123     link->handle = p_dev;
 124     p_dev->instance = link;
 125
 126     link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 127     parport_config(link);
 128
 129     return 0;
 130 } /* parport_attach */
 131
 132 /*======================================================================
 133
 134     This deletes a driver "instance".  The device is de-registered
 135     with Card Services.  If it has been released, all local data
 136     structures are freed.  Otherwise, the structures will be freed
 137     when the device is released.
 138
 139 ======================================================================*/
 140
 141 static void parport_detach(struct pcmcia_device *p_dev)
 142 {
 143     dev_link_t *link = dev_to_instance(p_dev);
 144
 145     DEBUG(0, "parport_detach(0x%p)\n", link);
 146
 147     if (link->state & DEV_CONFIG)
 148         parport_cs_release(link);
 149
 150     kfree(link->priv);
 151 } /* parport_detach */
 152
 153 /*======================================================================
 154
 155     parport_config() is scheduled to run after a CARD_INSERTION event
 156     is received, to configure the PCMCIA socket, and to make the
 157     parport device available to the system.
 158
 159 ======================================================================*/
 160
 161 #define CS_CHECK(fn, ret) \
 162 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 163
 164 void parport_config(dev_link_t *link)
 165 {
 166     client_handle_t handle = link->handle;
 167     parport_info_t *info = link->priv;
 168     tuple_t tuple;
 169     u_short buf[128];
 170     cisparse_t parse;
 171     config_info_t conf;
 172     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 173     cistpl_cftable_entry_t dflt = { 0 };
 174     struct parport *p;
 175     int last_ret, last_fn;
 176
 177     DEBUG(0, "parport_config(0x%p)\n", link);
 178
 179     tuple.TupleData = (cisdata_t *)buf;
 180     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 181     tuple.Attributes = 0;
 182     tuple.DesiredTuple = CISTPL_CONFIG;
 183     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 184     CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 185     CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 186     link->conf.ConfigBase = parse.config.base;
 187     link->conf.Present = parse.config.rmask[0];
 188
 189     /* Configure card */
 190     link->state |= DEV_CONFIG;
 191
 192     /* Not sure if this is right... look up the current Vcc */
 193     CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
 194
 195     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 196     tuple.Attributes = 0;
 197     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 198     while (1) {
 199         if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 200                 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 201             goto next_entry;
 202
 203         if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 204             cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 205             link->conf.ConfigIndex = cfg->index;
 206             if (epp_mode)
 207                 link->conf.ConfigIndex |= FORCE_EPP_MODE;
 208             link->io.BasePort1 = io->win[0].base;
 209             link->io.NumPorts1 = io->win[0].len;
 210             link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 211             if (io->nwin == 2) {
 212                 link->io.BasePort2 = io->win[1].base;
 213                 link->io.NumPorts2 = io->win[1].len;
 214             }
 215             if (pcmcia_request_io(link->handle, &link->io) != 0)
 216                 goto next_entry;
 217             /* If we've got this far, we're done */
 218             break;
 219         }
 220
 221     next_entry:
 222         if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 223         CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 224     }
 225
 226     CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
 227     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
 228
 229     release_region(link->io.BasePort1, link->io.NumPorts1);
 230     if (link->io.NumPorts2)
 231         release_region(link->io.BasePort2, link->io.NumPorts2);
 232     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 233                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 234                               NULL);
 235     if (p == NULL) {
 236         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 237                "0x%3x, irq %u failed\n", link->io.BasePort1,
 238                link->irq.AssignedIRQ);
 239         goto failed;
 240     }
 241
 242     p->modes |= PARPORT_MODE_PCSPP;
 243     if (epp_mode)
 244         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 245     info->ndev = 1;
 246     info->node.major = LP_MAJOR;
 247     info->node.minor = p->number;
 248     info->port = p;
 249     strcpy(info->node.dev_name, p->name);
 250     link->dev = &info->node;
 251
 252     link->state &= ~DEV_CONFIG_PENDING;
 253     return;
 254
 255 cs_failed:
 256     cs_error(link->handle, last_fn, last_ret);
 257 failed:
 258     parport_cs_release(link);
 259     link->state &= ~DEV_CONFIG_PENDING;
 260
 261 } /* parport_config */
 262
 263 /*======================================================================
 264
 265     After a card is removed, parport_cs_release() will unregister the
 266     device, and release the PCMCIA configuration.  If the device is
 267     still open, this will be postponed until it is closed.
 268
 269 ======================================================================*/
 270
 271 void parport_cs_release(dev_link_t *link)
 272 {
 273     parport_info_t *info = link->priv;
 274
 275     DEBUG(0, "parport_release(0x%p)\n", link);
 276
 277     if (info->ndev) {
 278         struct parport *p = info->port;
 279         parport_pc_unregister_port(p);
 280         request_region(link->io.BasePort1, link->io.NumPorts1,
 281                        info->node.dev_name);
 282         if (link->io.NumPorts2)
 283             request_region(link->io.BasePort2, link->io.NumPorts2,
 284                            info->node.dev_name);
 285     }
 286     info->ndev = 0;
 287     link->dev = NULL;
 288
 289     pcmcia_release_configuration(link->handle);
 290     pcmcia_release_io(link->handle, &link->io);
 291     pcmcia_release_irq(link->handle, &link->irq);
 292
 293     link->state &= ~DEV_CONFIG;
 294
 295 } /* parport_cs_release */
 296
 297 static int parport_suspend(struct pcmcia_device *dev)
 298 {
 299         dev_link_t *link = dev_to_instance(dev);
 300
 301         link->state |= DEV_SUSPEND;
 302         if (link->state & DEV_CONFIG)
 303                 pcmcia_release_configuration(link->handle);
 304
 305         return 0;
 306 }
 307
 308 static int parport_resume(struct pcmcia_device *dev)
 309 {
 310         dev_link_t *link = dev_to_instance(dev);
 311
 312         link->state &= ~DEV_SUSPEND;
 313         if (DEV_OK(link))
 314                 pcmcia_request_configuration(link->handle, &link->conf);
 315
 316         return 0;
 317 }
 318
 319 static struct pcmcia_device_id parport_ids[] = {
 320         PCMCIA_DEVICE_FUNC_ID(3),
 321         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 322         PCMCIA_DEVICE_NULL
 323 };
 324 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 325
 326 static struct pcmcia_driver parport_cs_driver = {
 327         .owner          = THIS_MODULE,
 328         .drv            = {
 329                 .name   = "parport_cs",
 330         },
 331         .probe          = parport_attach,
 332         .remove         = parport_detach,
 333         .id_table       = parport_ids,
 334         .suspend        = parport_suspend,
 335         .resume         = parport_resume,
 336 };
 337
 338 static int __init init_parport_cs(void)
 339 {
 340         return pcmcia_register_driver(&parport_cs_driver);
 341 }
 342
 343 static void __exit exit_parport_cs(void)
 344 {
 345         pcmcia_unregister_driver(&parport_cs_driver);
 346 }
 347
 348 module_init(init_parport_cs);
 349 module_exit(exit_parport_cs);