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/ptrace.h>
  41 #include <linux/slab.h>
  42 #include <linux/string.h>
  43 #include <linux/timer.h>
  44 #include <linux/ioport.h>
  45 #include <linux/major.h>
  46
  47 #include <linux/parport.h>
  48 #include <linux/parport_pc.h>
  49
  50 #include <pcmcia/cs_types.h>
  51 #include <pcmcia/cs.h>
  52 #include <pcmcia/cistpl.h>
  53 #include <pcmcia/ds.h>
  54 #include <pcmcia/cisreg.h>
  55 #include <pcmcia/ciscode.h>
  56
  57 /*====================================================================*/
  58
  59 /* Module parameters */
  60
  61 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  62 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  63 MODULE_LICENSE("Dual MPL/GPL");
  64
  65 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  66
  67 INT_MODULE_PARM(epp_mode, 1);
  68
  69 #ifdef PCMCIA_DEBUG
  70 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
  71 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  72 static char *version =
  73 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
  74 #else
  75 #define DEBUG(n, args...)
  76 #endif
  77
  78 /*====================================================================*/
  79
  80 #define FORCE_EPP_MODE  0x08
  81
  82 typedef struct parport_info_t {
  83         struct pcmcia_device    *p_dev;
  84     int                 ndev;
  85     dev_node_t          node;
  86     struct parport      *port;
  87 } parport_info_t;
  88
  89 static void parport_detach(struct pcmcia_device *p_dev);
  90 static int parport_config(struct pcmcia_device *link);
  91 static void parport_cs_release(struct pcmcia_device *);
  92
  93 /*======================================================================
  94
  95     parport_attach() creates an "instance" of the driver, allocating
  96     local data structures for one device.  The device is registered
  97     with Card Services.
  98
  99 ======================================================================*/
 100
 101 static int parport_probe(struct pcmcia_device *link)
 102 {
 103     parport_info_t *info;
 104
 105     DEBUG(0, "parport_attach()\n");
 106
 107     /* Create new parport device */
 108     info = kmalloc(sizeof(*info), GFP_KERNEL);
 109     if (!info) return -ENOMEM;
 110     memset(info, 0, sizeof(*info));
 111     link->priv = info;
 112     info->p_dev = link;
 113
 114     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 115     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 116     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 117     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 118     link->conf.Attributes = CONF_ENABLE_IRQ;
 119     link->conf.IntType = INT_MEMORY_AND_IO;
 120
 121     return parport_config(link);
 122 } /* parport_attach */
 123
 124 /*======================================================================
 125
 126     This deletes a driver "instance".  The device is de-registered
 127     with Card Services.  If it has been released, all local data
 128     structures are freed.  Otherwise, the structures will be freed
 129     when the device is released.
 130
 131 ======================================================================*/
 132
 133 static void parport_detach(struct pcmcia_device *link)
 134 {
 135     DEBUG(0, "parport_detach(0x%p)\n", link);
 136
 137     parport_cs_release(link);
 138
 139     kfree(link->priv);
 140 } /* parport_detach */
 141
 142 /*======================================================================
 143
 144     parport_config() is scheduled to run after a CARD_INSERTION event
 145     is received, to configure the PCMCIA socket, and to make the
 146     parport device available to the system.
 147
 148 ======================================================================*/
 149
 150 #define CS_CHECK(fn, ret) \
 151 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 152
 153 static int parport_config(struct pcmcia_device *link)
 154 {
 155     parport_info_t *info = link->priv;
 156     tuple_t tuple;
 157     u_short buf[128];
 158     cisparse_t parse;
 159     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 160     cistpl_cftable_entry_t dflt = { 0 };
 161     struct parport *p;
 162     int last_ret, last_fn;
 163
 164     DEBUG(0, "parport_config(0x%p)\n", link);
 165
 166     tuple.TupleData = (cisdata_t *)buf;
 167     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 168     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 169     tuple.Attributes = 0;
 170     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 171     while (1) {
 172         if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
 173                 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
 174             goto next_entry;
 175
 176         if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 177             cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 178             link->conf.ConfigIndex = cfg->index;
 179             if (epp_mode)
 180                 link->conf.ConfigIndex |= FORCE_EPP_MODE;
 181             link->io.BasePort1 = io->win[0].base;
 182             link->io.NumPorts1 = io->win[0].len;
 183             link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 184             if (io->nwin == 2) {
 185                 link->io.BasePort2 = io->win[1].base;
 186                 link->io.NumPorts2 = io->win[1].len;
 187             }
 188             if (pcmcia_request_io(link, &link->io) != 0)
 189                 goto next_entry;
 190             /* If we've got this far, we're done */
 191             break;
 192         }
 193
 194     next_entry:
 195         if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 196         CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
 197     }
 198
 199     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 200     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 201
 202     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 203                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 204                               &link->dev);
 205     if (p == NULL) {
 206         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 207                "0x%3x, irq %u failed\n", link->io.BasePort1,
 208                link->irq.AssignedIRQ);
 209         goto failed;
 210     }
 211
 212     p->modes |= PARPORT_MODE_PCSPP;
 213     if (epp_mode)
 214         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 215     info->ndev = 1;
 216     info->node.major = LP_MAJOR;
 217     info->node.minor = p->number;
 218     info->port = p;
 219     strcpy(info->node.dev_name, p->name);
 220     link->dev_node = &info->node;
 221
 222     return 0;
 223
 224 cs_failed:
 225     cs_error(link, last_fn, last_ret);
 226 failed:
 227     parport_cs_release(link);
 228     return -ENODEV;
 229 } /* parport_config */
 230
 231 /*======================================================================
 232
 233     After a card is removed, parport_cs_release() will unregister the
 234     device, and release the PCMCIA configuration.  If the device is
 235     still open, this will be postponed until it is closed.
 236
 237 ======================================================================*/
 238
 239 void parport_cs_release(struct pcmcia_device *link)
 240 {
 241         parport_info_t *info = link->priv;
 242
 243         DEBUG(0, "parport_release(0x%p)\n", link);
 244
 245         if (info->ndev) {
 246                 struct parport *p = info->port;
 247                 parport_pc_unregister_port(p);
 248         }
 249         info->ndev = 0;
 250
 251         pcmcia_disable_device(link);
 252 } /* parport_cs_release */
 253
 254
 255 static struct pcmcia_device_id parport_ids[] = {
 256         PCMCIA_DEVICE_FUNC_ID(3),
 257         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 258         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 259         PCMCIA_DEVICE_NULL
 260 };
 261 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 262
 263 static struct pcmcia_driver parport_cs_driver = {
 264         .owner          = THIS_MODULE,
 265         .drv            = {
 266                 .name   = "parport_cs",
 267         },
 268         .probe          = parport_probe,
 269         .remove         = parport_detach,
 270         .id_table       = parport_ids,
 271 };
 272
 273 static int __init init_parport_cs(void)
 274 {
 275         return pcmcia_register_driver(&parport_cs_driver);
 276 }
 277
 278 static void __exit exit_parport_cs(void)
 279 {
 280         pcmcia_unregister_driver(&parport_cs_driver);
 281 }
 282
 283 module_init(init_parport_cs);
 284 module_exit(exit_parport_cs);