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