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 #ifdef PCMCIA_DEBUG
  71 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
  72 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  73 static char *version =
  74 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
  75 #else
  76 #define DEBUG(n, args...)
  77 #endif
  78
  79 /*====================================================================*/
  80
  81 #define FORCE_EPP_MODE  0x08
  82
  83 typedef struct parport_info_t {
  84         struct pcmcia_device    *p_dev;
  85     int                 ndev;
  86     dev_node_t          node;
  87     struct parport      *port;
  88 } parport_info_t;
  89
  90 static void parport_detach(struct pcmcia_device *p_dev);
  91 static int parport_config(struct pcmcia_device *link);
  92 static void parport_cs_release(struct pcmcia_device *);
  93
  94 /*======================================================================
  95
  96     parport_attach() creates an "instance" of the driver, allocating
  97     local data structures for one device.  The device is registered
  98     with Card Services.
  99
 100 ======================================================================*/
 101
 102 static int parport_probe(struct pcmcia_device *link)
 103 {
 104     parport_info_t *info;
 105
 106     DEBUG(0, "parport_attach()\n");
 107
 108     /* Create new parport device */
 109     info = kzalloc(sizeof(*info), GFP_KERNEL);
 110     if (!info) return -ENOMEM;
 111     link->priv = info;
 112     info->p_dev = link;
 113
 114     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 115     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 116     link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 117     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 118     link->conf.Attributes = CONF_ENABLE_IRQ;
 119     link->conf.IntType = INT_MEMORY_AND_IO;
 120
 121     return parport_config(link);
 122 } /* parport_attach */
 123
 124 /*======================================================================
 125
 126     This deletes a driver "instance".  The device is de-registered
 127     with Card Services.  If it has been released, all local data
 128     structures are freed.  Otherwise, the structures will be freed
 129     when the device is released.
 130
 131 ======================================================================*/
 132
 133 static void parport_detach(struct pcmcia_device *link)
 134 {
 135     DEBUG(0, "parport_detach(0x%p)\n", link);
 136
 137     parport_cs_release(link);
 138
 139     kfree(link->priv);
 140 } /* parport_detach */
 141
 142 /*======================================================================
 143
 144     parport_config() is scheduled to run after a CARD_INSERTION event
 145     is received, to configure the PCMCIA socket, and to make the
 146     parport device available to the system.
 147
 148 ======================================================================*/
 149
 150 #define CS_CHECK(fn, ret) \
 151 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 152
 153 static int parport_config_check(struct pcmcia_device *p_dev,
 154                                 cistpl_cftable_entry_t *cfg,
 155                                 cistpl_cftable_entry_t *dflt,
 156                                 unsigned int vcc,
 157                                 void *priv_data)
 158 {
 159         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 160                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 161                 if (epp_mode)
 162                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 163                 p_dev->io.BasePort1 = io->win[0].base;
 164                 p_dev->io.NumPorts1 = io->win[0].len;
 165                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 166                 if (io->nwin == 2) {
 167                         p_dev->io.BasePort2 = io->win[1].base;
 168                         p_dev->io.NumPorts2 = io->win[1].len;
 169                 }
 170                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 171                         return -ENODEV;
 172                 return 0;
 173         }
 174         return -ENODEV;
 175 }
 176
 177 static int parport_config(struct pcmcia_device *link)
 178 {
 179     parport_info_t *info = link->priv;
 180     struct parport *p;
 181     int last_ret, last_fn;
 182
 183     DEBUG(0, "parport_config(0x%p)\n", link);
 184
 185     last_ret = pcmcia_loop_config(link, parport_config_check, NULL);
 186     if (last_ret) {
 187             cs_error(link, RequestIO, last_ret);
 188             goto failed;
 189     }
 190
 191     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 192     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 193
 194     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 195                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 196                               &link->dev, IRQF_SHARED);
 197     if (p == NULL) {
 198         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 199                "0x%3x, irq %u failed\n", link->io.BasePort1,
 200                link->irq.AssignedIRQ);
 201         goto failed;
 202     }
 203
 204     p->modes |= PARPORT_MODE_PCSPP;
 205     if (epp_mode)
 206         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 207     info->ndev = 1;
 208     info->node.major = LP_MAJOR;
 209     info->node.minor = p->number;
 210     info->port = p;
 211     strcpy(info->node.dev_name, p->name);
 212     link->dev_node = &info->node;
 213
 214     return 0;
 215
 216 cs_failed:
 217     cs_error(link, last_fn, last_ret);
 218 failed:
 219     parport_cs_release(link);
 220     return -ENODEV;
 221 } /* parport_config */
 222
 223 /*======================================================================
 224
 225     After a card is removed, parport_cs_release() will unregister the
 226     device, and release the PCMCIA configuration.  If the device is
 227     still open, this will be postponed until it is closed.
 228
 229 ======================================================================*/
 230
 231 static void parport_cs_release(struct pcmcia_device *link)
 232 {
 233         parport_info_t *info = link->priv;
 234
 235         DEBUG(0, "parport_release(0x%p)\n", link);
 236
 237         if (info->ndev) {
 238                 struct parport *p = info->port;
 239                 parport_pc_unregister_port(p);
 240         }
 241         info->ndev = 0;
 242
 243         pcmcia_disable_device(link);
 244 } /* parport_cs_release */
 245
 246
 247 static struct pcmcia_device_id parport_ids[] = {
 248         PCMCIA_DEVICE_FUNC_ID(3),
 249         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 250         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 251         PCMCIA_DEVICE_NULL
 252 };
 253 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 254
 255 static struct pcmcia_driver parport_cs_driver = {
 256         .owner          = THIS_MODULE,
 257         .drv            = {
 258                 .name   = "parport_cs",
 259         },
 260         .probe          = parport_probe,
 261         .remove         = parport_detach,
 262         .id_table       = parport_ids,
 263 };
 264
 265 static int __init init_parport_cs(void)
 266 {
 267         return pcmcia_register_driver(&parport_cs_driver);
 268 }
 269
 270 static void __exit exit_parport_cs(void)
 271 {
 272         pcmcia_unregister_driver(&parport_cs_driver);
 273 }
 274
 275 module_init(init_parport_cs);
 276 module_exit(exit_parport_cs);