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_types.h>
  52 #include <pcmcia/cs.h>
  53 #include <pcmcia/cistpl.h>
  54 #include <pcmcia/ds.h>
  55 #include <pcmcia/cisreg.h>
  56 #include <pcmcia/ciscode.h>
  57
  58 /*====================================================================*/
  59
  60 /* Module parameters */
  61
  62 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  63 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
  64 MODULE_LICENSE("Dual MPL/GPL");
  65
  66 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
  67
  68 INT_MODULE_PARM(epp_mode, 1);
  69
  70
  71 /*====================================================================*/
  72
  73 #define FORCE_EPP_MODE  0x08
  74
  75 typedef struct parport_info_t {
  76         struct pcmcia_device    *p_dev;
  77     int                 ndev;
  78     struct parport      *port;
  79 } parport_info_t;
  80
  81 static void parport_detach(struct pcmcia_device *p_dev);
  82 static int parport_config(struct pcmcia_device *link);
  83 static void parport_cs_release(struct pcmcia_device *);
  84
  85 /*======================================================================
  86
  87     parport_attach() creates an "instance" of the driver, allocating
  88     local data structures for one device.  The device is registered
  89     with Card Services.
  90
  91 ======================================================================*/
  92
  93 static int parport_probe(struct pcmcia_device *link)
  94 {
  95     parport_info_t *info;
  96
  97     dev_dbg(&link->dev, "parport_attach()\n");
  98
  99     /* Create new parport device */
 100     info = kzalloc(sizeof(*info), GFP_KERNEL);
 101     if (!info) return -ENOMEM;
 102     link->priv = info;
 103     info->p_dev = link;
 104
 105     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 106     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 107     link->conf.Attributes = CONF_ENABLE_IRQ;
 108     link->conf.IntType = INT_MEMORY_AND_IO;
 109
 110     return parport_config(link);
 111 } /* parport_attach */
 112
 113 /*======================================================================
 114
 115     This deletes a driver "instance".  The device is de-registered
 116     with Card Services.  If it has been released, all local data
 117     structures are freed.  Otherwise, the structures will be freed
 118     when the device is released.
 119
 120 ======================================================================*/
 121
 122 static void parport_detach(struct pcmcia_device *link)
 123 {
 124     dev_dbg(&link->dev, "parport_detach\n");
 125
 126     parport_cs_release(link);
 127
 128     kfree(link->priv);
 129 } /* parport_detach */
 130
 131 /*======================================================================
 132
 133     parport_config() is scheduled to run after a CARD_INSERTION event
 134     is received, to configure the PCMCIA socket, and to make the
 135     parport device available to the system.
 136
 137 ======================================================================*/
 138
 139 static int parport_config_check(struct pcmcia_device *p_dev,
 140                                 cistpl_cftable_entry_t *cfg,
 141                                 cistpl_cftable_entry_t *dflt,
 142                                 unsigned int vcc,
 143                                 void *priv_data)
 144 {
 145         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 146                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 147                 if (epp_mode)
 148                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 149                 p_dev->io.BasePort1 = io->win[0].base;
 150                 p_dev->io.NumPorts1 = io->win[0].len;
 151                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 152                 if (io->nwin == 2) {
 153                         p_dev->io.BasePort2 = io->win[1].base;
 154                         p_dev->io.NumPorts2 = io->win[1].len;
 155                 }
 156                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 157                         return -ENODEV;
 158                 return 0;
 159         }
 160         return -ENODEV;
 161 }
 162
 163 static int parport_config(struct pcmcia_device *link)
 164 {
 165     parport_info_t *info = link->priv;
 166     struct parport *p;
 167     int ret;
 168
 169     dev_dbg(&link->dev, "parport_config\n");
 170
 171     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 172     if (ret)
 173             goto failed;
 174
 175     if (!link->irq)
 176             goto failed;
 177     ret = pcmcia_request_configuration(link, &link->conf);
 178     if (ret)
 179             goto failed;
 180
 181     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 182                               link->irq, PARPORT_DMA_NONE,
 183                               &link->dev, IRQF_SHARED);
 184     if (p == NULL) {
 185         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 186                "0x%3x, irq %u failed\n", link->io.BasePort1,
 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);