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parport_cs.c
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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  <[email protected]>. 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/cistpl.h>
52 #include <pcmcia/ds.h>
53 #include <pcmcia/cisreg.h>
54 #include <pcmcia/ciscode.h>
55 
56 /*====================================================================*/
57 
58 /* Module parameters */
59 
60 MODULE_AUTHOR("David Hinds <[email protected]>");
61 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
62 MODULE_LICENSE("Dual MPL/GPL");
63 
64 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
65 
66 INT_MODULE_PARM(epp_mode, 1);
67 
68 
69 /*====================================================================*/
70 
71 #define FORCE_EPP_MODE 0x08
72 
73 typedef struct parport_info_t {
74  struct pcmcia_device *p_dev;
75  int ndev;
76  struct parport *port;
78 
79 static void parport_detach(struct pcmcia_device *p_dev);
80 static int parport_config(struct pcmcia_device *link);
81 static void parport_cs_release(struct pcmcia_device *);
82 
83 static int parport_probe(struct pcmcia_device *link)
84 {
86 
87  dev_dbg(&link->dev, "parport_attach()\n");
88 
89  /* Create new parport device */
90  info = kzalloc(sizeof(*info), GFP_KERNEL);
91  if (!info) return -ENOMEM;
92  link->priv = info;
93  info->p_dev = link;
94 
95  link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
96 
97  return parport_config(link);
98 } /* parport_attach */
99 
100 static void parport_detach(struct pcmcia_device *link)
101 {
102  dev_dbg(&link->dev, "parport_detach\n");
103 
104  parport_cs_release(link);
105 
106  kfree(link->priv);
107 } /* parport_detach */
108 
109 static int parport_config_check(struct pcmcia_device *p_dev, void *priv_data)
110 {
111  p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
112  p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
113  p_dev->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
114  p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
115 
116  return pcmcia_request_io(p_dev);
117 }
118 
119 static int parport_config(struct pcmcia_device *link)
120 {
121  parport_info_t *info = link->priv;
122  struct parport *p;
123  int ret;
124 
125  dev_dbg(&link->dev, "parport_config\n");
126 
127  if (epp_mode)
128  link->config_index |= FORCE_EPP_MODE;
129 
130  ret = pcmcia_loop_config(link, parport_config_check, NULL);
131  if (ret)
132  goto failed;
133 
134  if (!link->irq)
135  goto failed;
136  ret = pcmcia_enable_device(link);
137  if (ret)
138  goto failed;
139 
140  p = parport_pc_probe_port(link->resource[0]->start,
141  link->resource[1]->start,
142  link->irq, PARPORT_DMA_NONE,
143  &link->dev, IRQF_SHARED);
144  if (p == NULL) {
145  printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
146  "0x%3x, irq %u failed\n",
147  (unsigned int) link->resource[0]->start,
148  link->irq);
149  goto failed;
150  }
151 
153  if (epp_mode)
155  info->ndev = 1;
156  info->port = p;
157 
158  return 0;
159 
160 failed:
161  parport_cs_release(link);
162  return -ENODEV;
163 } /* parport_config */
164 
165 static void parport_cs_release(struct pcmcia_device *link)
166 {
167  parport_info_t *info = link->priv;
168 
169  dev_dbg(&link->dev, "parport_release\n");
170 
171  if (info->ndev) {
172  struct parport *p = info->port;
174  }
175  info->ndev = 0;
176 
177  pcmcia_disable_device(link);
178 } /* parport_cs_release */
179 
180 
181 static const struct pcmcia_device_id parport_ids[] = {
182  PCMCIA_DEVICE_FUNC_ID(3),
183  PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
184  PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
185  PCMCIA_DEVICE_NULL
186 };
187 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
188 
189 static struct pcmcia_driver parport_cs_driver = {
190  .owner = THIS_MODULE,
191  .name = "parport_cs",
192  .probe = parport_probe,
193  .remove = parport_detach,
194  .id_table = parport_ids,
195 };
196 
197 static int __init init_parport_cs(void)
198 {
199  return pcmcia_register_driver(&parport_cs_driver);
200 }
201 
202 static void __exit exit_parport_cs(void)
203 {
204  pcmcia_unregister_driver(&parport_cs_driver);
205 }
206 
207 module_init(init_parport_cs);
208 module_exit(exit_parport_cs);