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         struct pcmcia_device    *p_dev;
  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 int parport_config(struct pcmcia_device *link);
  92 static void parport_cs_release(struct pcmcia_device *);
  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_probe(struct pcmcia_device *link)
 103 {
 104     parport_info_t *info;
 105
 106     DEBUG(0, "parport_attach()\n");
 107
 108     /* Create new parport device */
 109     info = kmalloc(sizeof(*info), GFP_KERNEL);
 110     if (!info) return -ENOMEM;
 111     memset(info, 0, sizeof(*info));
 112     link->priv = info;
 113     info->p_dev = link;
 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.IntType = INT_MEMORY_AND_IO;
 121
 122     return parport_config(link);
 123 } /* parport_attach */
 124
 125 /*======================================================================
 126
 127     This deletes a driver "instance".  The device is de-registered
 128     with Card Services.  If it has been released, all local data
 129     structures are freed.  Otherwise, the structures will be freed
 130     when the device is released.
 131
 132 ======================================================================*/
 133
 134 static void parport_detach(struct pcmcia_device *link)
 135 {
 136     DEBUG(0, "parport_detach(0x%p)\n", link);
 137
 138     parport_cs_release(link);
 139
 140     kfree(link->priv);
 141 } /* parport_detach */
 142
 143 /*======================================================================
 144
 145     parport_config() is scheduled to run after a CARD_INSERTION event
 146     is received, to configure the PCMCIA socket, and to make the
 147     parport device available to the system.
 148
 149 ======================================================================*/
 150
 151 #define CS_CHECK(fn, ret) \
 152 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 153
 154 static int parport_config(struct pcmcia_device *link)
 155 {
 156     parport_info_t *info = link->priv;
 157     tuple_t tuple;
 158     u_short buf[128];
 159     cisparse_t parse;
 160     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 161     cistpl_cftable_entry_t dflt = { 0 };
 162     struct parport *p;
 163     int last_ret, last_fn;
 164
 165     DEBUG(0, "parport_config(0x%p)\n", link);
 166
 167     tuple.TupleData = (cisdata_t *)buf;
 168     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 169     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 170     tuple.Attributes = 0;
 171     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 172     while (1) {
 173         if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
 174                 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
 175             goto next_entry;
 176
 177         if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 178             cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 179             link->conf.ConfigIndex = cfg->index;
 180             if (epp_mode)
 181                 link->conf.ConfigIndex |= FORCE_EPP_MODE;
 182             link->io.BasePort1 = io->win[0].base;
 183             link->io.NumPorts1 = io->win[0].len;
 184             link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 185             if (io->nwin == 2) {
 186                 link->io.BasePort2 = io->win[1].base;
 187                 link->io.NumPorts2 = io->win[1].len;
 188             }
 189             if (pcmcia_request_io(link, &link->io) != 0)
 190                 goto next_entry;
 191             /* If we've got this far, we're done */
 192             break;
 193         }
 194
 195     next_entry:
 196         if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 197         CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
 198     }
 199
 200     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 201     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 202
 203     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 204                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 205                               NULL);
 206     if (p == NULL) {
 207         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 208                "0x%3x, irq %u failed\n", link->io.BasePort1,
 209                link->irq.AssignedIRQ);
 210         goto failed;
 211     }
 212
 213     p->modes |= PARPORT_MODE_PCSPP;
 214     if (epp_mode)
 215         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 216     info->ndev = 1;
 217     info->node.major = LP_MAJOR;
 218     info->node.minor = p->number;
 219     info->port = p;
 220     strcpy(info->node.dev_name, p->name);
 221     link->dev_node = &info->node;
 222
 223     return 0;
 224
 225 cs_failed:
 226     cs_error(link, last_fn, last_ret);
 227 failed:
 228     parport_cs_release(link);
 229     return -ENODEV;
 230 } /* parport_config */
 231
 232 /*======================================================================
 233
 234     After a card is removed, parport_cs_release() will unregister the
 235     device, and release the PCMCIA configuration.  If the device is
 236     still open, this will be postponed until it is closed.
 237
 238 ======================================================================*/
 239
 240 void parport_cs_release(struct pcmcia_device *link)
 241 {
 242         parport_info_t *info = link->priv;
 243
 244         DEBUG(0, "parport_release(0x%p)\n", link);
 245
 246         if (info->ndev) {
 247                 struct parport *p = info->port;
 248                 parport_pc_unregister_port(p);
 249         }
 250         info->ndev = 0;
 251
 252         pcmcia_disable_device(link);
 253 } /* parport_cs_release */
 254
 255
 256 static struct pcmcia_device_id parport_ids[] = {
 257         PCMCIA_DEVICE_FUNC_ID(3),
 258         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 259         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 260         PCMCIA_DEVICE_NULL
 261 };
 262 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 263
 264 static struct pcmcia_driver parport_cs_driver = {
 265         .owner          = THIS_MODULE,
 266         .drv            = {
 267                 .name   = "parport_cs",
 268         },
 269         .probe          = parport_probe,
 270         .remove         = parport_detach,
 271         .id_table       = parport_ids,
 272 };
 273
 274 static int __init init_parport_cs(void)
 275 {
 276         return pcmcia_register_driver(&parport_cs_driver);
 277 }
 278
 279 static void __exit exit_parport_cs(void)
 280 {
 281         pcmcia_unregister_driver(&parport_cs_driver);
 282 }
 283
 284 module_init(init_parport_cs);
 285 module_exit(exit_parport_cs);