xref: /openbmc/linux/drivers/parport/parport_cs.c (revision b627b4ed) 
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 #ifdef PCMCIA_DEBUG
71 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
72 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
73 static char *version =
74 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
75 #else
76 #define DEBUG(n, args...)
77 #endif
78 
79 /*====================================================================*/
80 
81 #define FORCE_EPP_MODE	0x08
82 
83 typedef struct parport_info_t {
84 	struct pcmcia_device	*p_dev;
85     int			ndev;
86     dev_node_t		node;
87     struct parport	*port;
88 } parport_info_t;
89 
90 static void parport_detach(struct pcmcia_device *p_dev);
91 static int parport_config(struct pcmcia_device *link);
92 static void parport_cs_release(struct pcmcia_device *);
93 
94 /*======================================================================
95 
96     parport_attach() creates an "instance" of the driver, allocating
97     local data structures for one device.  The device is registered
98     with Card Services.
99 
100 ======================================================================*/
101 
102 static int parport_probe(struct pcmcia_device *link)
103 {
104     parport_info_t *info;
105 
106     DEBUG(0, "parport_attach()\n");
107 
108     /* Create new parport device */
109     info = kzalloc(sizeof(*info), GFP_KERNEL);
110     if (!info) return -ENOMEM;
111     link->priv = info;
112     info->p_dev = link;
113 
114     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
115     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
116     link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
117     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
118     link->conf.Attributes = CONF_ENABLE_IRQ;
119     link->conf.IntType = INT_MEMORY_AND_IO;
120 
121     return parport_config(link);
122 } /* parport_attach */
123 
124 /*======================================================================
125 
126     This deletes a driver "instance".  The device is de-registered
127     with Card Services.  If it has been released, all local data
128     structures are freed.  Otherwise, the structures will be freed
129     when the device is released.
130 
131 ======================================================================*/
132 
133 static void parport_detach(struct pcmcia_device *link)
134 {
135     DEBUG(0, "parport_detach(0x%p)\n", link);
136 
137     parport_cs_release(link);
138 
139     kfree(link->priv);
140 } /* parport_detach */
141 
142 /*======================================================================
143 
144     parport_config() is scheduled to run after a CARD_INSERTION event
145     is received, to configure the PCMCIA socket, and to make the
146     parport device available to the system.
147 
148 ======================================================================*/
149 
150 #define CS_CHECK(fn, ret) \
151 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
152 
153 static int parport_config_check(struct pcmcia_device *p_dev,
154 				cistpl_cftable_entry_t *cfg,
155 				cistpl_cftable_entry_t *dflt,
156 				unsigned int vcc,
157 				void *priv_data)
158 {
159 	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
160 		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
161 		if (epp_mode)
162 			p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
163 		p_dev->io.BasePort1 = io->win[0].base;
164 		p_dev->io.NumPorts1 = io->win[0].len;
165 		p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
166 		if (io->nwin == 2) {
167 			p_dev->io.BasePort2 = io->win[1].base;
168 			p_dev->io.NumPorts2 = io->win[1].len;
169 		}
170 		if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
171 			return -ENODEV;
172 		return 0;
173 	}
174 	return -ENODEV;
175 }
176 
177 static int parport_config(struct pcmcia_device *link)
178 {
179     parport_info_t *info = link->priv;
180     struct parport *p;
181     int last_ret, last_fn;
182 
183     DEBUG(0, "parport_config(0x%p)\n", link);
184 
185     last_ret = pcmcia_loop_config(link, parport_config_check, NULL);
186     if (last_ret) {
187 	    cs_error(link, RequestIO, last_ret);
188 	    goto failed;
189     }
190 
191     CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
192     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
193 
194     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
195 			      link->irq.AssignedIRQ, PARPORT_DMA_NONE,
196 			      &link->dev, IRQF_SHARED);
197     if (p == NULL) {
198 	printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
199 	       "0x%3x, irq %u failed\n", link->io.BasePort1,
200 	       link->irq.AssignedIRQ);
201 	goto failed;
202     }
203 
204     p->modes |= PARPORT_MODE_PCSPP;
205     if (epp_mode)
206 	p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
207     info->ndev = 1;
208     info->node.major = LP_MAJOR;
209     info->node.minor = p->number;
210     info->port = p;
211     strcpy(info->node.dev_name, p->name);
212     link->dev_node = &info->node;
213 
214     return 0;
215 
216 cs_failed:
217     cs_error(link, last_fn, last_ret);
218 failed:
219     parport_cs_release(link);
220     return -ENODEV;
221 } /* parport_config */
222 
223 /*======================================================================
224 
225     After a card is removed, parport_cs_release() will unregister the
226     device, and release the PCMCIA configuration.  If the device is
227     still open, this will be postponed until it is closed.
228 
229 ======================================================================*/
230 
231 static void parport_cs_release(struct pcmcia_device *link)
232 {
233 	parport_info_t *info = link->priv;
234 
235 	DEBUG(0, "parport_release(0x%p)\n", link);
236 
237 	if (info->ndev) {
238 		struct parport *p = info->port;
239 		parport_pc_unregister_port(p);
240 	}
241 	info->ndev = 0;
242 
243 	pcmcia_disable_device(link);
244 } /* parport_cs_release */
245 
246 
247 static struct pcmcia_device_id parport_ids[] = {
248 	PCMCIA_DEVICE_FUNC_ID(3),
249 	PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
250 	PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
251 	PCMCIA_DEVICE_NULL
252 };
253 MODULE_DEVICE_TABLE(pcmcia, parport_ids);
254 
255 static struct pcmcia_driver parport_cs_driver = {
256 	.owner		= THIS_MODULE,
257 	.drv		= {
258 		.name	= "parport_cs",
259 	},
260 	.probe		= parport_probe,
261 	.remove		= parport_detach,
262 	.id_table	= parport_ids,
263 };
264 
265 static int __init init_parport_cs(void)
266 {
267 	return pcmcia_register_driver(&parport_cs_driver);
268 }
269 
270 static void __exit exit_parport_cs(void)
271 {
272 	pcmcia_unregister_driver(&parport_cs_driver);
273 }
274 
275 module_init(init_parport_cs);
276 module_exit(exit_parport_cs);
277