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                 p_dev->conf.ConfigIndex = cfg->index;
 160                 if (epp_mode)
 161                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 162                 p_dev->io.BasePort1 = io->win[0].base;
 163                 p_dev->io.NumPorts1 = io->win[0].len;
 164                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 165                 if (io->nwin == 2) {
 166                         p_dev->io.BasePort2 = io->win[1].base;
 167                         p_dev->io.NumPorts2 = io->win[1].len;
 168                 }
 169                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 170                         goto next_entry;
 171                 return 0;
 172         }
 173
 174 next_entry:
 175         if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 176                 *dflt = *cfg;
 177         return -ENODEV;
 178 }
 179
 180 static int parport_config(struct pcmcia_device *link)
 181 {
 182     parport_info_t *info = link->priv;
 183     cistpl_cftable_entry_t dflt = { 0 };
 184     struct parport *p;
 185     int last_ret, last_fn;
 186
 187     DEBUG(0, "parport_config(0x%p)\n", link);
 188
 189     last_ret = pcmcia_loop_config(link, parport_config_check, &dflt);
 190     if (last_ret) {
 191             cs_error(link, RequestIO, last_ret);
 192             goto failed;
 193     }
 194
 195     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 196     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 197
 198     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 199                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 200                               &link->dev);
 201     if (p == NULL) {
 202         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 203                "0x%3x, irq %u failed\n", link->io.BasePort1,
 204                link->irq.AssignedIRQ);
 205         goto failed;
 206     }
 207
 208     p->modes |= PARPORT_MODE_PCSPP;
 209     if (epp_mode)
 210         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 211     info->ndev = 1;
 212     info->node.major = LP_MAJOR;
 213     info->node.minor = p->number;
 214     info->port = p;
 215     strcpy(info->node.dev_name, p->name);
 216     link->dev_node = &info->node;
 217
 218     return 0;
 219
 220 cs_failed:
 221     cs_error(link, last_fn, last_ret);
 222 failed:
 223     parport_cs_release(link);
 224     return -ENODEV;
 225 } /* parport_config */
 226
 227 /*======================================================================
 228
 229     After a card is removed, parport_cs_release() will unregister the
 230     device, and release the PCMCIA configuration.  If the device is
 231     still open, this will be postponed until it is closed.
 232
 233 ======================================================================*/
 234
 235 static void parport_cs_release(struct pcmcia_device *link)
 236 {
 237         parport_info_t *info = link->priv;
 238
 239         DEBUG(0, "parport_release(0x%p)\n", link);
 240
 241         if (info->ndev) {
 242                 struct parport *p = info->port;
 243                 parport_pc_unregister_port(p);
 244         }
 245         info->ndev = 0;
 246
 247         pcmcia_disable_device(link);
 248 } /* parport_cs_release */
 249
 250
 251 static struct pcmcia_device_id parport_ids[] = {
 252         PCMCIA_DEVICE_FUNC_ID(3),
 253         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 254         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 255         PCMCIA_DEVICE_NULL
 256 };
 257 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 258
 259 static struct pcmcia_driver parport_cs_driver = {
 260         .owner          = THIS_MODULE,
 261         .drv            = {
 262                 .name   = "parport_cs",
 263         },
 264         .probe          = parport_probe,
 265         .remove         = parport_detach,
 266         .id_table       = parport_ids,
 267 };
 268
 269 static int __init init_parport_cs(void)
 270 {
 271         return pcmcia_register_driver(&parport_cs_driver);
 272 }
 273
 274 static void __exit exit_parport_cs(void)
 275 {
 276         pcmcia_unregister_driver(&parport_cs_driver);
 277 }
 278
 279 module_init(init_parport_cs);
 280 module_exit(exit_parport_cs);