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