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 = kzalloc(sizeof(*info), GFP_KERNEL);
 109     if (!info) return -ENOMEM;
 110     link->priv = info;
 111     info->p_dev = link;
 112
 113     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 114     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 115     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 116     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 117     link->conf.Attributes = CONF_ENABLE_IRQ;
 118     link->conf.IntType = INT_MEMORY_AND_IO;
 119
 120     return parport_config(link);
 121 } /* parport_attach */
 122
 123 /*======================================================================
 124
 125     This deletes a driver "instance".  The device is de-registered
 126     with Card Services.  If it has been released, all local data
 127     structures are freed.  Otherwise, the structures will be freed
 128     when the device is released.
 129
 130 ======================================================================*/
 131
 132 static void parport_detach(struct pcmcia_device *link)
 133 {
 134     DEBUG(0, "parport_detach(0x%p)\n", link);
 135
 136     parport_cs_release(link);
 137
 138     kfree(link->priv);
 139 } /* parport_detach */
 140
 141 /*======================================================================
 142
 143     parport_config() is scheduled to run after a CARD_INSERTION event
 144     is received, to configure the PCMCIA socket, and to make the
 145     parport device available to the system.
 146
 147 ======================================================================*/
 148
 149 #define CS_CHECK(fn, ret) \
 150 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 151
 152 static int parport_config(struct pcmcia_device *link)
 153 {
 154     parport_info_t *info = link->priv;
 155     tuple_t tuple;
 156     u_short buf[128];
 157     cisparse_t parse;
 158     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 159     cistpl_cftable_entry_t dflt = { 0 };
 160     struct parport *p;
 161     int last_ret, last_fn;
 162
 163     DEBUG(0, "parport_config(0x%p)\n", link);
 164
 165     tuple.TupleData = (cisdata_t *)buf;
 166     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
 167     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 168     tuple.Attributes = 0;
 169     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 170     while (1) {
 171         if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
 172                 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
 173             goto next_entry;
 174
 175         if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 176             cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 177             link->conf.ConfigIndex = cfg->index;
 178             if (epp_mode)
 179                 link->conf.ConfigIndex |= FORCE_EPP_MODE;
 180             link->io.BasePort1 = io->win[0].base;
 181             link->io.NumPorts1 = io->win[0].len;
 182             link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 183             if (io->nwin == 2) {
 184                 link->io.BasePort2 = io->win[1].base;
 185                 link->io.NumPorts2 = io->win[1].len;
 186             }
 187             if (pcmcia_request_io(link, &link->io) != 0)
 188                 goto next_entry;
 189             /* If we've got this far, we're done */
 190             break;
 191         }
 192
 193     next_entry:
 194         if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 195         CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
 196     }
 197
 198     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 199     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 200
 201     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 202                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 203                               &link->dev);
 204     if (p == NULL) {
 205         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 206                "0x%3x, irq %u failed\n", link->io.BasePort1,
 207                link->irq.AssignedIRQ);
 208         goto failed;
 209     }
 210
 211     p->modes |= PARPORT_MODE_PCSPP;
 212     if (epp_mode)
 213         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 214     info->ndev = 1;
 215     info->node.major = LP_MAJOR;
 216     info->node.minor = p->number;
 217     info->port = p;
 218     strcpy(info->node.dev_name, p->name);
 219     link->dev_node = &info->node;
 220
 221     return 0;
 222
 223 cs_failed:
 224     cs_error(link, last_fn, last_ret);
 225 failed:
 226     parport_cs_release(link);
 227     return -ENODEV;
 228 } /* parport_config */
 229
 230 /*======================================================================
 231
 232     After a card is removed, parport_cs_release() will unregister the
 233     device, and release the PCMCIA configuration.  If the device is
 234     still open, this will be postponed until it is closed.
 235
 236 ======================================================================*/
 237
 238 void parport_cs_release(struct pcmcia_device *link)
 239 {
 240         parport_info_t *info = link->priv;
 241
 242         DEBUG(0, "parport_release(0x%p)\n", link);
 243
 244         if (info->ndev) {
 245                 struct parport *p = info->port;
 246                 parport_pc_unregister_port(p);
 247         }
 248         info->ndev = 0;
 249
 250         pcmcia_disable_device(link);
 251 } /* parport_cs_release */
 252
 253
 254 static struct pcmcia_device_id parport_ids[] = {
 255         PCMCIA_DEVICE_FUNC_ID(3),
 256         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 257         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 258         PCMCIA_DEVICE_NULL
 259 };
 260 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 261
 262 static struct pcmcia_driver parport_cs_driver = {
 263         .owner          = THIS_MODULE,
 264         .drv            = {
 265                 .name   = "parport_cs",
 266         },
 267         .probe          = parport_probe,
 268         .remove         = parport_detach,
 269         .id_table       = parport_ids,
 270 };
 271
 272 static int __init init_parport_cs(void)
 273 {
 274         return pcmcia_register_driver(&parport_cs_driver);
 275 }
 276
 277 static void __exit exit_parport_cs(void)
 278 {
 279         pcmcia_unregister_driver(&parport_cs_driver);
 280 }
 281
 282 module_init(init_parport_cs);
 283 module_exit(exit_parport_cs);