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/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 <dahinds@users.sourceforge.net>");
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;
77 } parport_info_t;
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 
parport_probe(struct pcmcia_device * link)83 static int parport_probe(struct pcmcia_device *link)
84 {
85     parport_info_t *info;
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 
parport_detach(struct pcmcia_device * link)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 
parport_config_check(struct pcmcia_device * p_dev,void * priv_data)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 
parport_config(struct pcmcia_device * link)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 	    pr_notice("parport_cs: parport_pc_probe_port() at 0x%3x, irq %u failed\n",
146 		      (unsigned int)link->resource[0]->start, link->irq);
147 	goto failed;
148     }
149 
150     p->modes |= PARPORT_MODE_PCSPP;
151     if (epp_mode)
152 	p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
153     info->ndev = 1;
154     info->port = p;
155 
156     return 0;
157 
158 failed:
159 	parport_cs_release(link);
160 	kfree(link->priv);
161 	return -ENODEV;
162 } /* parport_config */
163 
parport_cs_release(struct pcmcia_device * link)164 static void parport_cs_release(struct pcmcia_device *link)
165 {
166 	parport_info_t *info = link->priv;
167 
168 	dev_dbg(&link->dev, "parport_release\n");
169 
170 	if (info->ndev) {
171 		struct parport *p = info->port;
172 		parport_pc_unregister_port(p);
173 	}
174 	info->ndev = 0;
175 
176 	pcmcia_disable_device(link);
177 } /* parport_cs_release */
178 
179 
180 static const struct pcmcia_device_id parport_ids[] = {
181 	PCMCIA_DEVICE_FUNC_ID(3),
182 	PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
183 	PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
184 	PCMCIA_DEVICE_NULL
185 };
186 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
187 
188 static struct pcmcia_driver parport_cs_driver = {
189 	.owner		= THIS_MODULE,
190 	.name		= "parport_cs",
191 	.probe		= parport_probe,
192 	.remove		= parport_detach,
193 	.id_table	= parport_ids,
194 };
195 module_pcmcia_driver(parport_cs_driver);
196