linux/drivers/parport/parport_cs.c
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   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
  60MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  61MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  62MODULE_LICENSE("Dual MPL/GPL");
  63
  64#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  65
  66INT_MODULE_PARM(epp_mode, 1);
  67
  68
  69/*====================================================================*/
  70
  71#define FORCE_EPP_MODE  0x08
  72
  73typedef struct parport_info_t {
  74        struct pcmcia_device    *p_dev;
  75    int                 ndev;
  76    struct parport      *port;
  77} parport_info_t;
  78
  79static void parport_detach(struct pcmcia_device *p_dev);
  80static int parport_config(struct pcmcia_device *link);
  81static void parport_cs_release(struct pcmcia_device *);
  82
  83static 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
 100static 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
 109static 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
 119static 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
 160failed:
 161    parport_cs_release(link);
 162    return -ENODEV;
 163} /* parport_config */
 164
 165static void parport_cs_release(struct pcmcia_device *link)
 166{
 167        parport_info_t *info = link->priv;
 168
 169        dev_dbg(&link->dev, "parport_release\n");
 170
 171        if (info->ndev) {
 172                struct parport *p = info->port;
 173                parport_pc_unregister_port(p);
 174        }
 175        info->ndev = 0;
 176
 177        pcmcia_disable_device(link);
 178} /* parport_cs_release */
 179
 180
 181static const struct pcmcia_device_id parport_ids[] = {
 182        PCMCIA_DEVICE_FUNC_ID(3),
 183        PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 184        PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 185        PCMCIA_DEVICE_NULL
 186};
 187MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 188
 189static struct pcmcia_driver parport_cs_driver = {
 190        .owner          = THIS_MODULE,
 191        .name           = "parport_cs",
 192        .probe          = parport_probe,
 193        .remove         = parport_detach,
 194        .id_table       = parport_ids,
 195};
 196module_pcmcia_driver(parport_cs_driver);
 197
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