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 static int parport_probe(struct pcmcia_device *link)
  84 {
  85     parport_info_t *info;
  86
  87     dev_dbg(&link->dev, "parport_attach()\n");
  88
  89     /* Create new parport device */
  90     info = kzalloc(sizeof(*info), GFP_KERNEL);
  91     if (!info) return -ENOMEM;
  92     link->priv = info;
  93     info->p_dev = link;
  94
  95     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
  96
  97     return parport_config(link);
  98 } /* parport_attach */
  99
 100 static void parport_detach(struct pcmcia_device *link)
 101 {
 102     dev_dbg(&link->dev, "parport_detach\n");
 103
 104     parport_cs_release(link);
 105
 106     kfree(link->priv);
 107 } /* parport_detach */
 108
 109 static int parport_config_check(struct pcmcia_device *p_dev, void *priv_data)
 110 {
 111         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 112         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 113         p_dev->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
 114         p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
 115
 116         return pcmcia_request_io(p_dev);
 117 }
 118
 119 static int parport_config(struct pcmcia_device *link)
 120 {
 121     parport_info_t *info = link->priv;
 122     struct parport *p;
 123     int ret;
 124
 125     dev_dbg(&link->dev, "parport_config\n");
 126
 127     if (epp_mode)
 128             link->config_index |= FORCE_EPP_MODE;
 129
 130     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 131     if (ret)
 132             goto failed;
 133
 134     if (!link->irq)
 135             goto failed;
 136     ret = pcmcia_enable_device(link);
 137     if (ret)
 138             goto failed;
 139
 140     p = parport_pc_probe_port(link->resource[0]->start,
 141                               link->resource[1]->start,
 142                               link->irq, PARPORT_DMA_NONE,
 143                               &link->dev, IRQF_SHARED);
 144     if (p == NULL) {
 145             pr_notice("parport_cs: parport_pc_probe_port() at 0x%3x, irq %u failed\n",
 146                       (unsigned int)link->resource[0]->start, link->irq);
 147         goto failed;
 148     }
 149
 150     p->modes |= PARPORT_MODE_PCSPP;
 151     if (epp_mode)
 152         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 153     info->ndev = 1;
 154     info->port = p;
 155
 156     return 0;
 157
 158 failed:
 159         parport_cs_release(link);
 160         kfree(link->priv);
 161         return -ENODEV;
 162 } /* parport_config */
 163
 164 static void parport_cs_release(struct pcmcia_device *link)
 165 {
 166         parport_info_t *info = link->priv;
 167
 168         dev_dbg(&link->dev, "parport_release\n");
 169
 170         if (info->ndev) {
 171                 struct parport *p = info->port;
 172                 parport_pc_unregister_port(p);
 173         }
 174         info->ndev = 0;
 175
 176         pcmcia_disable_device(link);
 177 } /* parport_cs_release */
 178
 179
 180 static const struct pcmcia_device_id parport_ids[] = {
 181         PCMCIA_DEVICE_FUNC_ID(3),
 182         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 183         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 184         PCMCIA_DEVICE_NULL
 185 };
 186 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 187
 188 static struct pcmcia_driver parport_cs_driver = {
 189         .owner          = THIS_MODULE,
 190         .name           = "parport_cs",
 191         .probe          = parport_probe,
 192         .remove         = parport_detach,
 193         .id_table       = parport_ids,
 194 };
 195 module_pcmcia_driver(parport_cs_driver);