root/drivers/parport/parport_cs.c

DEFINITIONS

1. parport_probe
2. parport_detach
3. parport_config_check
4. parport_config
5. parport_cs_release

   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         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 146                "0x%3x, irq %u failed\n",
 147                (unsigned int) link->resource[0]->start,
 148                link->irq);
 149         goto failed;
 150     }
 151 
 152     p->modes |= PARPORT_MODE_PCSPP;
 153     if (epp_mode)
 154         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 155     info->ndev = 1;
 156     info->port = p;
 157 
 158     return 0;
 159 
 160 failed:
 161         parport_cs_release(link);
 162         kfree(link->priv);
 163         return -ENODEV;
 164 } /* parport_config */
 165 
 166 static void parport_cs_release(struct pcmcia_device *link)
 167 {
 168         parport_info_t *info = link->priv;
 169 
 170         dev_dbg(&link->dev, "parport_release\n");
 171 
 172         if (info->ndev) {
 173                 struct parport *p = info->port;
 174                 parport_pc_unregister_port(p);
 175         }
 176         info->ndev = 0;
 177 
 178         pcmcia_disable_device(link);
 179 } /* parport_cs_release */
 180 
 181 
 182 static const struct pcmcia_device_id parport_ids[] = {
 183         PCMCIA_DEVICE_FUNC_ID(3),
 184         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 185         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 186         PCMCIA_DEVICE_NULL
 187 };
 188 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 189 
 190 static struct pcmcia_driver parport_cs_driver = {
 191         .owner          = THIS_MODULE,
 192         .name           = "parport_cs",
 193         .probe          = parport_probe,
 194         .remove         = parport_detach,
 195         .id_table       = parport_ids,
 196 };
 197 module_pcmcia_driver(parport_cs_driver);