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/cs.h>
  52 #include <pcmcia/cistpl.h>
  53 #include <pcmcia/ds.h>
  54 #include <pcmcia/cisreg.h>
  55 #include <pcmcia/ciscode.h>
  56
  57 /*====================================================================*/
  58
  59 /* Module parameters */
  60
  61 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  62 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  63 MODULE_LICENSE("Dual MPL/GPL");
  64
  65 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  66
  67 INT_MODULE_PARM(epp_mode, 1);
  68
  69
  70 /*====================================================================*/
  71
  72 #define FORCE_EPP_MODE  0x08
  73
  74 typedef struct parport_info_t {
  75         struct pcmcia_device    *p_dev;
  76     int                 ndev;
  77     struct parport      *port;
  78 } parport_info_t;
  79
  80 static void parport_detach(struct pcmcia_device *p_dev);
  81 static int parport_config(struct pcmcia_device *link);
  82 static void parport_cs_release(struct pcmcia_device *);
  83
  84 /*======================================================================
  85
  86     parport_attach() creates an "instance" of the driver, allocating
  87     local data structures for one device.  The device is registered
  88     with Card Services.
  89
  90 ======================================================================*/
  91
  92 static int parport_probe(struct pcmcia_device *link)
  93 {
  94     parport_info_t *info;
  95
  96     dev_dbg(&link->dev, "parport_attach()\n");
  97
  98     /* Create new parport device */
  99     info = kzalloc(sizeof(*info), GFP_KERNEL);
 100     if (!info) return -ENOMEM;
 101     link->priv = info;
 102     info->p_dev = link;
 103
 104     link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 105     link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
 106     link->conf.Attributes = CONF_ENABLE_IRQ;
 107
 108     return parport_config(link);
 109 } /* parport_attach */
 110
 111 /*======================================================================
 112
 113     This deletes a driver "instance".  The device is de-registered
 114     with Card Services.  If it has been released, all local data
 115     structures are freed.  Otherwise, the structures will be freed
 116     when the device is released.
 117
 118 ======================================================================*/
 119
 120 static void parport_detach(struct pcmcia_device *link)
 121 {
 122     dev_dbg(&link->dev, "parport_detach\n");
 123
 124     parport_cs_release(link);
 125
 126     kfree(link->priv);
 127 } /* parport_detach */
 128
 129 /*======================================================================
 130
 131     parport_config() is scheduled to run after a CARD_INSERTION event
 132     is received, to configure the PCMCIA socket, and to make the
 133     parport device available to the system.
 134
 135 ======================================================================*/
 136
 137 static int parport_config_check(struct pcmcia_device *p_dev,
 138                                 cistpl_cftable_entry_t *cfg,
 139                                 cistpl_cftable_entry_t *dflt,
 140                                 unsigned int vcc,
 141                                 void *priv_data)
 142 {
 143         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 144                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 145                 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
 146                 if (epp_mode)
 147                         p_dev->config_index |= FORCE_EPP_MODE;
 148                 p_dev->resource[0]->start = io->win[0].base;
 149                 p_dev->resource[0]->end = io->win[0].len;
 150                 if (io->nwin == 2) {
 151                         p_dev->resource[1]->start = io->win[1].base;
 152                         p_dev->resource[1]->end = io->win[1].len;
 153                 }
 154                 if (pcmcia_request_io(p_dev) != 0)
 155                         return -ENODEV;
 156                 return 0;
 157         }
 158         return -ENODEV;
 159 }
 160
 161 static int parport_config(struct pcmcia_device *link)
 162 {
 163     parport_info_t *info = link->priv;
 164     struct parport *p;
 165     int ret;
 166
 167     dev_dbg(&link->dev, "parport_config\n");
 168
 169     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 170     if (ret)
 171             goto failed;
 172
 173     if (!link->irq)
 174             goto failed;
 175     ret = pcmcia_request_configuration(link, &link->conf);
 176     if (ret)
 177             goto failed;
 178
 179     p = parport_pc_probe_port(link->resource[0]->start,
 180                               link->resource[1]->start,
 181                               link->irq, PARPORT_DMA_NONE,
 182                               &link->dev, IRQF_SHARED);
 183     if (p == NULL) {
 184         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 185                "0x%3x, irq %u failed\n",
 186                (unsigned int) link->resource[0]->start,
 187                link->irq);
 188         goto failed;
 189     }
 190
 191     p->modes |= PARPORT_MODE_PCSPP;
 192     if (epp_mode)
 193         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 194     info->ndev = 1;
 195     info->port = p;
 196
 197     return 0;
 198
 199 failed:
 200     parport_cs_release(link);
 201     return -ENODEV;
 202 } /* parport_config */
 203
 204 /*======================================================================
 205
 206     After a card is removed, parport_cs_release() will unregister the
 207     device, and release the PCMCIA configuration.  If the device is
 208     still open, this will be postponed until it is closed.
 209
 210 ======================================================================*/
 211
 212 static void parport_cs_release(struct pcmcia_device *link)
 213 {
 214         parport_info_t *info = link->priv;
 215
 216         dev_dbg(&link->dev, "parport_release\n");
 217
 218         if (info->ndev) {
 219                 struct parport *p = info->port;
 220                 parport_pc_unregister_port(p);
 221         }
 222         info->ndev = 0;
 223
 224         pcmcia_disable_device(link);
 225 } /* parport_cs_release */
 226
 227
 228 static struct pcmcia_device_id parport_ids[] = {
 229         PCMCIA_DEVICE_FUNC_ID(3),
 230         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 231         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 232         PCMCIA_DEVICE_NULL
 233 };
 234 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 235
 236 static struct pcmcia_driver parport_cs_driver = {
 237         .owner          = THIS_MODULE,
 238         .drv            = {
 239                 .name   = "parport_cs",
 240         },
 241         .probe          = parport_probe,
 242         .remove         = parport_detach,
 243         .id_table       = parport_ids,
 244 };
 245
 246 static int __init init_parport_cs(void)
 247 {
 248         return pcmcia_register_driver(&parport_cs_driver);
 249 }
 250
 251 static void __exit exit_parport_cs(void)
 252 {
 253         pcmcia_unregister_driver(&parport_cs_driver);
 254 }
 255
 256 module_init(init_parport_cs);
 257 module_exit(exit_parport_cs);