xref: /openbmc/linux/drivers/parport/parport_cs.c (revision 9ac8d3fb) 
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_DYNAMIC_SHARING;
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 				cistpl_cftable_entry_t *dflt,
155 				unsigned int vcc,
156 				void *priv_data)
157 {
158 	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
159 		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
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 			return -ENODEV;
171 		return 0;
172 	}
173 	return -ENODEV;
174 }
175 
176 static int parport_config(struct pcmcia_device *link)
177 {
178     parport_info_t *info = link->priv;
179     struct parport *p;
180     int last_ret, last_fn;
181 
182     DEBUG(0, "parport_config(0x%p)\n", link);
183 
184     last_ret = pcmcia_loop_config(link, parport_config_check, NULL);
185     if (last_ret) {
186 	    cs_error(link, RequestIO, last_ret);
187 	    goto failed;
188     }
189 
190     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
191     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
192 
193     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
194 			      link->irq.AssignedIRQ, PARPORT_DMA_NONE,
195 			      &link->dev);
196     if (p == NULL) {
197 	printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
198 	       "0x%3x, irq %u failed\n", link->io.BasePort1,
199 	       link->irq.AssignedIRQ);
200 	goto failed;
201     }
202 
203     p->modes |= PARPORT_MODE_PCSPP;
204     if (epp_mode)
205 	p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
206     info->ndev = 1;
207     info->node.major = LP_MAJOR;
208     info->node.minor = p->number;
209     info->port = p;
210     strcpy(info->node.dev_name, p->name);
211     link->dev_node = &info->node;
212 
213     return 0;
214 
215 cs_failed:
216     cs_error(link, last_fn, last_ret);
217 failed:
218     parport_cs_release(link);
219     return -ENODEV;
220 } /* parport_config */
221 
222 /*======================================================================
223 
224     After a card is removed, parport_cs_release() will unregister the
225     device, and release the PCMCIA configuration.  If the device is
226     still open, this will be postponed until it is closed.
227 
228 ======================================================================*/
229 
230 static void parport_cs_release(struct pcmcia_device *link)
231 {
232 	parport_info_t *info = link->priv;
233 
234 	DEBUG(0, "parport_release(0x%p)\n", link);
235 
236 	if (info->ndev) {
237 		struct parport *p = info->port;
238 		parport_pc_unregister_port(p);
239 	}
240 	info->ndev = 0;
241 
242 	pcmcia_disable_device(link);
243 } /* parport_cs_release */
244 
245 
246 static struct pcmcia_device_id parport_ids[] = {
247 	PCMCIA_DEVICE_FUNC_ID(3),
248 	PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
249 	PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
250 	PCMCIA_DEVICE_NULL
251 };
252 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
253 
254 static struct pcmcia_driver parport_cs_driver = {
255 	.owner		= THIS_MODULE,
256 	.drv		= {
257 		.name	= "parport_cs",
258 	},
259 	.probe		= parport_probe,
260 	.remove		= parport_detach,
261 	.id_table	= parport_ids,
262 };
263 
264 static int __init init_parport_cs(void)
265 {
266 	return pcmcia_register_driver(&parport_cs_driver);
267 }
268 
269 static void __exit exit_parport_cs(void)
270 {
271 	pcmcia_unregister_driver(&parport_cs_driver);
272 }
273 
274 module_init(init_parport_cs);
275 module_exit(exit_parport_cs);
276