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/cistpl.h>
  52 #include <pcmcia/ds.h>
  53 #include <pcmcia/cisreg.h>
  54 #include <pcmcia/ciscode.h>
  55
  56 /*====================================================================*/
  57
  58 /* Module parameters */
  59
  60 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  61 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  62 MODULE_LICENSE("Dual MPL/GPL");
  63
  64 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  65
  66 INT_MODULE_PARM(epp_mode, 1);
  67
  68
  69 /*====================================================================*/
  70
  71 #define FORCE_EPP_MODE  0x08
  72
  73 typedef struct parport_info_t {
  74         struct pcmcia_device    *p_dev;
  75     int                 ndev;
  76     struct parport      *port;
  77 } parport_info_t;
  78
  79 static void parport_detach(struct pcmcia_device *p_dev);
  80 static int parport_config(struct pcmcia_device *link);
  81 static void parport_cs_release(struct pcmcia_device *);
  82
  83 /*======================================================================
  84
  85     parport_attach() creates an "instance" of the driver, allocating
  86     local data structures for one device.  The device is registered
  87     with Card Services.
  88
  89 ======================================================================*/
  90
  91 static int parport_probe(struct pcmcia_device *link)
  92 {
  93     parport_info_t *info;
  94
  95     dev_dbg(&link->dev, "parport_attach()\n");
  96
  97     /* Create new parport device */
  98     info = kzalloc(sizeof(*info), GFP_KERNEL);
  99     if (!info) return -ENOMEM;
 100     link->priv = info;
 101     info->p_dev = link;
 102
 103     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 104
 105     return parport_config(link);
 106 } /* parport_attach */
 107
 108 /*======================================================================
 109
 110     This deletes a driver "instance".  The device is de-registered
 111     with Card Services.  If it has been released, all local data
 112     structures are freed.  Otherwise, the structures will be freed
 113     when the device is released.
 114
 115 ======================================================================*/
 116
 117 static void parport_detach(struct pcmcia_device *link)
 118 {
 119     dev_dbg(&link->dev, "parport_detach\n");
 120
 121     parport_cs_release(link);
 122
 123     kfree(link->priv);
 124 } /* parport_detach */
 125
 126 /*======================================================================
 127
 128     parport_config() is scheduled to run after a CARD_INSERTION event
 129     is received, to configure the PCMCIA socket, and to make the
 130     parport device available to the system.
 131
 132 ======================================================================*/
 133
 134 static int parport_config_check(struct pcmcia_device *p_dev, void *priv_data)
 135 {
 136         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 137         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 138         p_dev->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
 139         p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
 140
 141         return pcmcia_request_io(p_dev);
 142 }
 143
 144 static int parport_config(struct pcmcia_device *link)
 145 {
 146     parport_info_t *info = link->priv;
 147     struct parport *p;
 148     int ret;
 149
 150     dev_dbg(&link->dev, "parport_config\n");
 151
 152     if (epp_mode)
 153             link->config_index |= FORCE_EPP_MODE;
 154
 155     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 156     if (ret)
 157             goto failed;
 158
 159     if (!link->irq)
 160             goto failed;
 161     ret = pcmcia_enable_device(link);
 162     if (ret)
 163             goto failed;
 164
 165     p = parport_pc_probe_port(link->resource[0]->start,
 166                               link->resource[1]->start,
 167                               link->irq, PARPORT_DMA_NONE,
 168                               &link->dev, IRQF_SHARED);
 169     if (p == NULL) {
 170         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 171                "0x%3x, irq %u failed\n",
 172                (unsigned int) link->resource[0]->start,
 173                link->irq);
 174         goto failed;
 175     }
 176
 177     p->modes |= PARPORT_MODE_PCSPP;
 178     if (epp_mode)
 179         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 180     info->ndev = 1;
 181     info->port = p;
 182
 183     return 0;
 184
 185 failed:
 186     parport_cs_release(link);
 187     return -ENODEV;
 188 } /* parport_config */
 189
 190 /*======================================================================
 191
 192     After a card is removed, parport_cs_release() will unregister the
 193     device, and release the PCMCIA configuration.  If the device is
 194     still open, this will be postponed until it is closed.
 195
 196 ======================================================================*/
 197
 198 static void parport_cs_release(struct pcmcia_device *link)
 199 {
 200         parport_info_t *info = link->priv;
 201
 202         dev_dbg(&link->dev, "parport_release\n");
 203
 204         if (info->ndev) {
 205                 struct parport *p = info->port;
 206                 parport_pc_unregister_port(p);
 207         }
 208         info->ndev = 0;
 209
 210         pcmcia_disable_device(link);
 211 } /* parport_cs_release */
 212
 213
 214 static struct pcmcia_device_id parport_ids[] = {
 215         PCMCIA_DEVICE_FUNC_ID(3),
 216         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 217         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 218         PCMCIA_DEVICE_NULL
 219 };
 220 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 221
 222 static struct pcmcia_driver parport_cs_driver = {
 223         .owner          = THIS_MODULE,
 224         .name           = "parport_cs",
 225         .probe          = parport_probe,
 226         .remove         = parport_detach,
 227         .id_table       = parport_ids,
 228 };
 229
 230 static int __init init_parport_cs(void)
 231 {
 232         return pcmcia_register_driver(&parport_cs_driver);
 233 }
 234
 235 static void __exit exit_parport_cs(void)
 236 {
 237         pcmcia_unregister_driver(&parport_cs_driver);
 238 }
 239
 240 module_init(init_parport_cs);
 241 module_exit(exit_parport_cs);