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->irq.IRQInfo1 = IRQ_LEVEL_ID;
 110     link->conf.Attributes = CONF_ENABLE_IRQ;
 111     link->conf.IntType = INT_MEMORY_AND_IO;
 112
 113     return parport_config(link);
 114 } /* parport_attach */
 115
 116 /*======================================================================
 117
 118     This deletes a driver "instance".  The device is de-registered
 119     with Card Services.  If it has been released, all local data
 120     structures are freed.  Otherwise, the structures will be freed
 121     when the device is released.
 122
 123 ======================================================================*/
 124
 125 static void parport_detach(struct pcmcia_device *link)
 126 {
 127     dev_dbg(&link->dev, "parport_detach\n");
 128
 129     parport_cs_release(link);
 130
 131     kfree(link->priv);
 132 } /* parport_detach */
 133
 134 /*======================================================================
 135
 136     parport_config() is scheduled to run after a CARD_INSERTION event
 137     is received, to configure the PCMCIA socket, and to make the
 138     parport device available to the system.
 139
 140 ======================================================================*/
 141
 142 static int parport_config_check(struct pcmcia_device *p_dev,
 143                                 cistpl_cftable_entry_t *cfg,
 144                                 cistpl_cftable_entry_t *dflt,
 145                                 unsigned int vcc,
 146                                 void *priv_data)
 147 {
 148         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 149                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 150                 if (epp_mode)
 151                         p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
 152                 p_dev->io.BasePort1 = io->win[0].base;
 153                 p_dev->io.NumPorts1 = io->win[0].len;
 154                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 155                 if (io->nwin == 2) {
 156                         p_dev->io.BasePort2 = io->win[1].base;
 157                         p_dev->io.NumPorts2 = io->win[1].len;
 158                 }
 159                 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
 160                         return -ENODEV;
 161                 return 0;
 162         }
 163         return -ENODEV;
 164 }
 165
 166 static int parport_config(struct pcmcia_device *link)
 167 {
 168     parport_info_t *info = link->priv;
 169     struct parport *p;
 170     int ret;
 171
 172     dev_dbg(&link->dev, "parport_config\n");
 173
 174     ret = pcmcia_loop_config(link, parport_config_check, NULL);
 175     if (ret)
 176             goto failed;
 177
 178     ret = pcmcia_request_irq(link, &link->irq);
 179     if (ret)
 180             goto failed;
 181     ret = pcmcia_request_configuration(link, &link->conf);
 182     if (ret)
 183             goto failed;
 184
 185     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 186                               link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 187                               &link->dev, IRQF_SHARED);
 188     if (p == NULL) {
 189         printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 190                "0x%3x, irq %u failed\n", link->io.BasePort1,
 191                link->irq.AssignedIRQ);
 192         goto failed;
 193     }
 194
 195     p->modes |= PARPORT_MODE_PCSPP;
 196     if (epp_mode)
 197         p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
 198     info->ndev = 1;
 199     info->node.major = LP_MAJOR;
 200     info->node.minor = p->number;
 201     info->port = p;
 202     strcpy(info->node.dev_name, p->name);
 203     link->dev_node = &info->node;
 204
 205     return 0;
 206
 207 failed:
 208     parport_cs_release(link);
 209     return -ENODEV;
 210 } /* parport_config */
 211
 212 /*======================================================================
 213
 214     After a card is removed, parport_cs_release() will unregister the
 215     device, and release the PCMCIA configuration.  If the device is
 216     still open, this will be postponed until it is closed.
 217
 218 ======================================================================*/
 219
 220 static void parport_cs_release(struct pcmcia_device *link)
 221 {
 222         parport_info_t *info = link->priv;
 223
 224         dev_dbg(&link->dev, "parport_release\n");
 225
 226         if (info->ndev) {
 227                 struct parport *p = info->port;
 228                 parport_pc_unregister_port(p);
 229         }
 230         info->ndev = 0;
 231
 232         pcmcia_disable_device(link);
 233 } /* parport_cs_release */
 234
 235
 236 static struct pcmcia_device_id parport_ids[] = {
 237         PCMCIA_DEVICE_FUNC_ID(3),
 238         PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
 239         PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 240         PCMCIA_DEVICE_NULL
 241 };
 242 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
 243
 244 static struct pcmcia_driver parport_cs_driver = {
 245         .owner          = THIS_MODULE,
 246         .drv            = {
 247                 .name   = "parport_cs",
 248         },
 249         .probe          = parport_probe,
 250         .remove         = parport_detach,
 251         .id_table       = parport_ids,
 252 };
 253
 254 static int __init init_parport_cs(void)
 255 {
 256         return pcmcia_register_driver(&parport_cs_driver);
 257 }
 258
 259 static void __exit exit_parport_cs(void)
 260 {
 261         pcmcia_unregister_driver(&parport_cs_driver);
 262 }
 263
 264 module_init(init_parport_cs);
 265 module_exit(exit_parport_cs);