release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <linux/interrupt.h>
  47
  48 #include <linux/parport.h>
  49 #include <linux/parport_pc.h>
  50
  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
  70 /*====================================================================*/
  71
  72 #define FORCE_EPP_MODE  0x08
  73
  74 typedef struct parport_info_t {
  75         struct pcmcia_device    *p_dev;
  76     int                 ndev;
  77     struct parport      *port;
  78 } parport_info_t;
  79
  80 static void parport_detach(struct pcmcia_device *p_dev);
  81 static int parport_config(struct pcmcia_device *link);
  82 static void parport_cs_release(struct pcmcia_device *);
  83
  84 /*======================================================================
  85
  86     parport_attach() creates an "instance" of the driver, allocating
  87     local data structures for one device.  The device is registered
  88     with Card Services.
  89
  90 ======================================================================*/
  91
  92 static int parport_probe(struct pcmcia_device *link)
  93 {
  94     parport_info_t *info;
  95
  96     dev_dbg(&link->dev, "parport_attach()\n");
  97
  98     /* Create new parport device */
  99     info = kzalloc(sizeof(*info), GFP_KERNEL);
 100     if (!info) return -ENOMEM;
 101     link->priv = info;
 102     info->p_dev = link;
 103
 104     link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 105     link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
 106     link->conf.Attributes = CONF_ENABLE_IRQ;
 107     link->conf.IntType = INT_MEMORY_AND_IO;
 108
 109     return parport_config(link);
 110 } /* parport_attach */
 111
 112 /*======================================================================
 113
 114     This deletes a driver "instance".  The device is de-registered
 115     with Card Services.  If it has been released, all local data
 116     structures are freed.  Otherwise, the structures will be freed
 117     when the device is released.
 118
 119 ======================================================================*/
 120
 121 static void parport_detach(struct pcmcia_device *link)
 122 {
 123     dev_dbg(&link->dev, "parport_detach\n");
 124
 125     parport_cs_release(link);
 126
 127     kfree(link->priv);
 128 } /* parport_detach */
 129
 130 /*======================================================================
 131
 132     parport_config() is scheduled to run after a CARD_INSERTION event
 133     is received, to configure the PCMCIA socket, and to make the
 134     parport device available to the system.
 135
 136 ======================================================================*/
 137
 138 static int parport_config_check(struct pcmcia_device *p_dev,
 139                                 cistpl_cftable_entry_t *cfg,
 140                                 cistpl_cftable_entry_t *dflt,
 141                                 unsigned int vcc,
 142                                 void *priv_data)
 143 {
 144         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 145                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 146                 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
 147                 if (epp_mode)
 148                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 149                 p_dev->resource[0]->start = io->win[0].base;
 150                 p_dev->resource[0]->end = io->win[0].len;
 151                 if (io->nwin == 2) {
 152                         p_dev->resource[1]->start = io->win[1].base;
 153                         p_dev->resource[1]->end = io->win[1].len;
 154                 }
 155                 if (pcmcia_request_io(p_dev) != 0)
 156                         return -ENODEV;
 157                 return 0;
 158         }
 159         return -ENODEV;
 160 }
 161
 162 static int parport_config(struct pcmcia_device *link)
 163 {
 164     parport_info_t *info = link->priv;
 165     struct parport *p;
 166     int ret;
 167
 168     dev_dbg(&link->dev, "parport_config\n");
 169
 170     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 171     if (ret)
 172             goto failed;
 173
 174     if (!link->irq)
 175             goto failed;
 176     ret = pcmcia_request_configuration(link, &link->conf);
 177     if (ret)
 178             goto failed;
 179
 180     p = parport_pc_probe_port(link->resource[0]->start,
 181                               link->resource[1]->start,
 182                               link->irq, PARPORT_DMA_NONE,
 183                               &link->dev, IRQF_SHARED);
 184     if (p == NULL) {
 185         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 186                "0x%3x, irq %u failed\n",
 187                (unsigned int) link->resource[0]->start,
 188                link->irq);
 189         goto failed;
 190     }
 191
 192     p->modes |= PARPORT_MODE_PCSPP;
 193     if (epp_mode)
 194         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 195     info->ndev = 1;
 196     info->port = p;
 197
 198     return 0;
 199
 200 failed:
 201     parport_cs_release(link);
 202     return -ENODEV;
 203 } /* parport_config */
 204
 205 /*======================================================================
 206
 207     After a card is removed, parport_cs_release() will unregister the
 208     device, and release the PCMCIA configuration.  If the device is
 209     still open, this will be postponed until it is closed.
 210
 211 ======================================================================*/
 212
 213 static void parport_cs_release(struct pcmcia_device *link)
 214 {
 215         parport_info_t *info = link->priv;
 216
 217         dev_dbg(&link->dev, "parport_release\n");
 218
 219         if (info->ndev) {
 220                 struct parport *p = info->port;
 221                 parport_pc_unregister_port(p);
 222         }
 223         info->ndev = 0;
 224
 225         pcmcia_disable_device(link);
 226 } /* parport_cs_release */
 227
 228
 229 static struct pcmcia_device_id parport_ids[] = {
 230         PCMCIA_DEVICE_FUNC_ID(3),
 231         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 232         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 233         PCMCIA_DEVICE_NULL
 234 };
 235 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 236
 237 static struct pcmcia_driver parport_cs_driver = {
 238         .owner          = THIS_MODULE,
 239         .drv            = {
 240                 .name   = "parport_cs",
 241         },
 242         .probe          = parport_probe,
 243         .remove         = parport_detach,
 244         .id_table       = parport_ids,
 245 };
 246
 247 static int __init init_parport_cs(void)
 248 {
 249         return pcmcia_register_driver(&parport_cs_driver);
 250 }
 251
 252 static void __exit exit_parport_cs(void)
 253 {
 254         pcmcia_unregister_driver(&parport_cs_driver);
 255 }
 256
 257 module_init(init_parport_cs);
 258 module_exit(exit_parport_cs);