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     dev_node_t          node;
  79     struct parport      *port;
  80 } parport_info_t;
  81
  82 static void parport_detach(struct pcmcia_device *p_dev);
  83 static int parport_config(struct pcmcia_device *link);
  84 static void parport_cs_release(struct pcmcia_device *);
  85
  86 /*======================================================================
  87
  88     parport_attach() creates an "instance" of the driver, allocating
  89     local data structures for one device.  The device is registered
  90     with Card Services.
  91
  92 ======================================================================*/
  93
  94 static int parport_probe(struct pcmcia_device *link)
  95 {
  96     parport_info_t *info;
  97
  98     dev_dbg(&link->dev, "parport_attach()\n");
  99
 100     /* Create new parport device */
 101     info = kzalloc(sizeof(*info), GFP_KERNEL);
 102     if (!info) return -ENOMEM;
 103     link->priv = info;
 104     info->p_dev = link;
 105
 106     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 107     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 108     link->conf.Attributes = CONF_ENABLE_IRQ;
 109     link->conf.IntType = INT_MEMORY_AND_IO;
 110
 111     return parport_config(link);
 112 } /* parport_attach */
 113
 114 /*======================================================================
 115
 116     This deletes a driver "instance".  The device is de-registered
 117     with Card Services.  If it has been released, all local data
 118     structures are freed.  Otherwise, the structures will be freed
 119     when the device is released.
 120
 121 ======================================================================*/
 122
 123 static void parport_detach(struct pcmcia_device *link)
 124 {
 125     dev_dbg(&link->dev, "parport_detach\n");
 126
 127     parport_cs_release(link);
 128
 129     kfree(link->priv);
 130 } /* parport_detach */
 131
 132 /*======================================================================
 133
 134     parport_config() is scheduled to run after a CARD_INSERTION event
 135     is received, to configure the PCMCIA socket, and to make the
 136     parport device available to the system.
 137
 138 ======================================================================*/
 139
 140 static int parport_config_check(struct pcmcia_device *p_dev,
 141                                 cistpl_cftable_entry_t *cfg,
 142                                 cistpl_cftable_entry_t *dflt,
 143                                 unsigned int vcc,
 144                                 void *priv_data)
 145 {
 146         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 147                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 148                 if (epp_mode)
 149                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 150                 p_dev->io.BasePort1 = io->win[0].base;
 151                 p_dev->io.NumPorts1 = io->win[0].len;
 152                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 153                 if (io->nwin == 2) {
 154                         p_dev->io.BasePort2 = io->win[1].base;
 155                         p_dev->io.NumPorts2 = io->win[1].len;
 156                 }
 157                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 158                         return -ENODEV;
 159                 return 0;
 160         }
 161         return -ENODEV;
 162 }
 163
 164 static int parport_config(struct pcmcia_device *link)
 165 {
 166     parport_info_t *info = link->priv;
 167     struct parport *p;
 168     int ret;
 169
 170     dev_dbg(&link->dev, "parport_config\n");
 171
 172     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 173     if (ret)
 174             goto failed;
 175
 176     if (!link->irq)
 177             goto failed;
 178     ret = pcmcia_request_configuration(link, &link->conf);
 179     if (ret)
 180             goto failed;
 181
 182     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 183                               link->irq, PARPORT_DMA_NONE,
 184                               &link->dev, IRQF_SHARED);
 185     if (p == NULL) {
 186         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 187                "0x%3x, irq %u failed\n", link->io.BasePort1,
 188                link->irq);
 189         goto failed;
 190     }
 191
 192     p->modes |= PARPORT_MODE_PCSPP;
 193     if (epp_mode)
 194         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 195     info->ndev = 1;
 196     info->node.major = LP_MAJOR;
 197     info->node.minor = p->number;
 198     info->port = p;
 199     strcpy(info->node.dev_name, p->name);
 200     link->dev_node = &info->node;
 201
 202     return 0;
 203
 204 failed:
 205     parport_cs_release(link);
 206     return -ENODEV;
 207 } /* parport_config */
 208
 209 /*======================================================================
 210
 211     After a card is removed, parport_cs_release() will unregister the
 212     device, and release the PCMCIA configuration.  If the device is
 213     still open, this will be postponed until it is closed.
 214
 215 ======================================================================*/
 216
 217 static void parport_cs_release(struct pcmcia_device *link)
 218 {
 219         parport_info_t *info = link->priv;
 220
 221         dev_dbg(&link->dev, "parport_release\n");
 222
 223         if (info->ndev) {
 224                 struct parport *p = info->port;
 225                 parport_pc_unregister_port(p);
 226         }
 227         info->ndev = 0;
 228
 229         pcmcia_disable_device(link);
 230 } /* parport_cs_release */
 231
 232
 233 static struct pcmcia_device_id parport_ids[] = {
 234         PCMCIA_DEVICE_FUNC_ID(3),
 235         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 236         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 237         PCMCIA_DEVICE_NULL
 238 };
 239 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 240
 241 static struct pcmcia_driver parport_cs_driver = {
 242         .owner          = THIS_MODULE,
 243         .drv            = {
 244                 .name   = "parport_cs",
 245         },
 246         .probe          = parport_probe,
 247         .remove         = parport_detach,
 248         .id_table       = parport_ids,
 249 };
 250
 251 static int __init init_parport_cs(void)
 252 {
 253         return pcmcia_register_driver(&parport_cs_driver);
 254 }
 255
 256 static void __exit exit_parport_cs(void)
 257 {
 258         pcmcia_unregister_driver(&parport_cs_driver);
 259 }
 260
 261 module_init(init_parport_cs);
 262 module_exit(exit_parport_cs);