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
  47 #include <linux/parport.h>
  48 #include <linux/parport_pc.h>
  49
  50 #include <pcmcia/cs_types.h>
  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 #ifdef PCMCIA_DEBUG
  70 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
  71 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  72 static char *version =
  73 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
  74 #else
  75 #define DEBUG(n, args...)
  76 #endif
  77
  78 /*====================================================================*/
  79
  80 #define FORCE_EPP_MODE  0x08
  81
  82 typedef struct parport_info_t {
  83         struct pcmcia_device    *p_dev;
  84     int                 ndev;
  85     dev_node_t          node;
  86     struct parport      *port;
  87 } parport_info_t;
  88
  89 static void parport_detach(struct pcmcia_device *p_dev);
  90 static int parport_config(struct pcmcia_device *link);
  91 static void parport_cs_release(struct pcmcia_device *);
  92
  93 /*======================================================================
  94
  95     parport_attach() creates an "instance" of the driver, allocating
  96     local data structures for one device.  The device is registered
  97     with Card Services.
  98
  99 ======================================================================*/
 100
 101 static int parport_probe(struct pcmcia_device *link)
 102 {
 103     parport_info_t *info;
 104
 105     DEBUG(0, "parport_attach()\n");
 106
 107     /* Create new parport device */
 108     info = kzalloc(sizeof(*info), GFP_KERNEL);
 109     if (!info) return -ENOMEM;
 110     link->priv = info;
 111     info->p_dev = link;
 112
 113     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 114     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
 115     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 116     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 117     link->conf.Attributes = CONF_ENABLE_IRQ;
 118     link->conf.IntType = INT_MEMORY_AND_IO;
 119
 120     return parport_config(link);
 121 } /* parport_attach */
 122
 123 /*======================================================================
 124
 125     This deletes a driver "instance".  The device is de-registered
 126     with Card Services.  If it has been released, all local data
 127     structures are freed.  Otherwise, the structures will be freed
 128     when the device is released.
 129
 130 ======================================================================*/
 131
 132 static void parport_detach(struct pcmcia_device *link)
 133 {
 134     DEBUG(0, "parport_detach(0x%p)\n", link);
 135
 136     parport_cs_release(link);
 137
 138     kfree(link->priv);
 139 } /* parport_detach */
 140
 141 /*======================================================================
 142
 143     parport_config() is scheduled to run after a CARD_INSERTION event
 144     is received, to configure the PCMCIA socket, and to make the
 145     parport device available to the system.
 146
 147 ======================================================================*/
 148
 149 #define CS_CHECK(fn, ret) \
 150 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 151
 152 static int parport_config_check(struct pcmcia_device *p_dev,
 153                                 cistpl_cftable_entry_t *cfg,
 154                                 void *priv_data)
 155 {
 156         cistpl_cftable_entry_t *dflt = priv_data;
 157         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 158                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 159                 if (epp_mode)
 160                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 161                 p_dev->io.BasePort1 = io->win[0].base;
 162                 p_dev->io.NumPorts1 = io->win[0].len;
 163                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 164                 if (io->nwin == 2) {
 165                         p_dev->io.BasePort2 = io->win[1].base;
 166                         p_dev->io.NumPorts2 = io->win[1].len;
 167                 }
 168                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 169                         goto next_entry;
 170                 return 0;
 171         }
 172
 173 next_entry:
 174         if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 175                 *dflt = *cfg;
 176         return -ENODEV;
 177 }
 178
 179 static int parport_config(struct pcmcia_device *link)
 180 {
 181     parport_info_t *info = link->priv;
 182     cistpl_cftable_entry_t dflt = { 0 };
 183     struct parport *p;
 184     int last_ret, last_fn;
 185
 186     DEBUG(0, "parport_config(0x%p)\n", link);
 187
 188     last_ret = pcmcia_loop_config(link, parport_config_check, &dflt);
 189     if (last_ret) {
 190             cs_error(link, RequestIO, last_ret);
 191             goto failed;
 192     }
 193
 194     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 195     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 196
 197     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 198                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 199                               &link->dev);
 200     if (p == NULL) {
 201         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 202                "0x%3x, irq %u failed\n", link->io.BasePort1,
 203                link->irq.AssignedIRQ);
 204         goto failed;
 205     }
 206
 207     p->modes |= PARPORT_MODE_PCSPP;
 208     if (epp_mode)
 209         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 210     info->ndev = 1;
 211     info->node.major = LP_MAJOR;
 212     info->node.minor = p->number;
 213     info->port = p;
 214     strcpy(info->node.dev_name, p->name);
 215     link->dev_node = &info->node;
 216
 217     return 0;
 218
 219 cs_failed:
 220     cs_error(link, last_fn, last_ret);
 221 failed:
 222     parport_cs_release(link);
 223     return -ENODEV;
 224 } /* parport_config */
 225
 226 /*======================================================================
 227
 228     After a card is removed, parport_cs_release() will unregister the
 229     device, and release the PCMCIA configuration.  If the device is
 230     still open, this will be postponed until it is closed.
 231
 232 ======================================================================*/
 233
 234 static void parport_cs_release(struct pcmcia_device *link)
 235 {
 236         parport_info_t *info = link->priv;
 237
 238         DEBUG(0, "parport_release(0x%p)\n", link);
 239
 240         if (info->ndev) {
 241                 struct parport *p = info->port;
 242                 parport_pc_unregister_port(p);
 243         }
 244         info->ndev = 0;
 245
 246         pcmcia_disable_device(link);
 247 } /* parport_cs_release */
 248
 249
 250 static struct pcmcia_device_id parport_ids[] = {
 251         PCMCIA_DEVICE_FUNC_ID(3),
 252         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 253         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 254         PCMCIA_DEVICE_NULL
 255 };
 256 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 257
 258 static struct pcmcia_driver parport_cs_driver = {
 259         .owner          = THIS_MODULE,
 260         .drv            = {
 261                 .name   = "parport_cs",
 262         },
 263         .probe          = parport_probe,
 264         .remove         = parport_detach,
 265         .id_table       = parport_ids,
 266 };
 267
 268 static int __init init_parport_cs(void)
 269 {
 270         return pcmcia_register_driver(&parport_cs_driver);
 271 }
 272
 273 static void __exit exit_parport_cs(void)
 274 {
 275         pcmcia_unregister_driver(&parport_cs_driver);
 276 }
 277
 278 module_init(init_parport_cs);
 279 module_exit(exit_parport_cs);