1 /*======================================================================
2
3 An elsa_cs PCMCIA client driver
4
5 This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink
6
7
8 The contents of this file are subject to the Mozilla Public
9 License Version 1.1 (the "License"); you may not use this file
10 except in compliance with the License. You may obtain a copy of
11 the License at http://www.mozilla.org/MPL/
12
13 Software distributed under the License is distributed on an "AS
14 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
15 implied. See the License for the specific language governing
16 rights and limitations under the License.
17
18 The initial developer of the original code is David A. Hinds
19 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
20 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
21
22 Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
23 Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.
24
25 Alternatively, the contents of this file may be used under the
26 terms of the GNU General Public License version 2 (the "GPL"), in
27 which case the provisions of the GPL are applicable instead of the
28 above. If you wish to allow the use of your version of this file
29 only under the terms of the GPL and not to allow others to use
30 your version of this file under the MPL, indicate your decision
31 by deleting the provisions above and replace them with the notice
32 and other provisions required by the GPL. If you do not delete
33 the provisions above, a recipient may use your version of this
34 file under either the MPL or the GPL.
35
36 ======================================================================*/
37
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/init.h>
41 #include <linux/ptrace.h>
42 #include <linux/slab.h>
43 #include <linux/string.h>
44 #include <linux/timer.h>
45 #include <linux/ioport.h>
46 #include <asm/io.h>
47 #include <asm/system.h>
48
49 #include <pcmcia/cs_types.h>
50 #include <pcmcia/cs.h>
51 #include <pcmcia/cistpl.h>
52 #include <pcmcia/cisreg.h>
53 #include <pcmcia/ds.h>
54 #include "hisax_cfg.h"
55
56 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
57 MODULE_AUTHOR("Klaus Lichtenwalder");
58 MODULE_LICENSE("Dual MPL/GPL");
59
60 /*
61 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
62 you do not define PCMCIA_DEBUG at all, all the debug code will be
63 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
64 be present but disabled -- but it can then be enabled for specific
65 modules at load time with a 'pc_debug=#' option to insmod.
66 */
67
68 #ifdef PCMCIA_DEBUG
69 static int pc_debug = PCMCIA_DEBUG;
70 module_param(pc_debug, int, 0);
71 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
72 static char *version =
73 "elsa_cs.c $Revision: 1.2.2.4 $ $Date: 2004/01/25 15:07:06 $ (K.Lichtenwalder)";
74 #else
75 #define DEBUG(n, args...)
76 #endif
77
78 /*====================================================================*/
79
80 /* Parameters that can be set with 'insmod' */
81
82 static int protocol = 2; /* EURO-ISDN Default */
83 module_param(protocol, int, 0);
84
85 /*====================================================================*/
86
87 /*
88 The event() function is this driver's Card Services event handler.
89 It will be called by Card Services when an appropriate card status
90 event is received. The config() and release() entry points are
91 used to configure or release a socket, in response to card insertion
92 and ejection events. They are invoked from the elsa_cs event
93 handler.
94 */
95
96 static int elsa_cs_config(struct pcmcia_device *link);
97 static void elsa_cs_release(struct pcmcia_device *link);
98
99 /*
100 The attach() and detach() entry points are used to create and destroy
101 "instances" of the driver, where each instance represents everything
102 needed to manage one actual PCMCIA card.
103 */
104
105 static void elsa_cs_detach(struct pcmcia_device *p_dev);
106
107 /*
108 A driver needs to provide a dev_node_t structure for each device
109 on a card. In some cases, there is only one device per card (for
110 example, ethernet cards, modems). In other cases, there may be
111 many actual or logical devices (SCSI adapters, memory cards with
112 multiple partitions). The dev_node_t structures need to be kept
113 in a linked list starting at the 'dev' field of a struct pcmcia_device
114 structure. We allocate them in the card's private data structure,
115 because they generally shouldn't be allocated dynamically.
116 In this case, we also provide a flag to indicate if a device is
117 "stopped" due to a power management event, or card ejection. The
118 device IO routines can use a flag like this to throttle IO to a
119 card that is not ready to accept it.
120 */
121
122 typedef struct local_info_t {
123 struct pcmcia_device *p_dev;
124 dev_node_t node;
125 int busy;
126 int cardnr;
127 } local_info_t;
128
129 /*======================================================================
130
131 elsa_cs_attach() creates an "instance" of the driver, allocatingx
132 local data structures for one device. The device is registered
133 with Card Services.
134
135 The dev_link structure is initialized, but we don't actually
136 configure the card at this point -- we wait until we receive a
137 card insertion event.
138
139 ======================================================================*/
140
141 static int elsa_cs_probe(struct pcmcia_device *link)
142 {
143 local_info_t *local;
144
145 DEBUG(0, "elsa_cs_attach()\n");
146
147 /* Allocate space for private device-specific data */
148 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
149 if (!local) return -ENOMEM;
150
151 local->p_dev = link;
152 link->priv = local;
153
154 local->cardnr = -1;
155
156 /* Interrupt setup */
157 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
158 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
159 link->irq.Handler = NULL;
160
161 /*
162 General socket configuration defaults can go here. In this
163 client, we assume very little, and rely on the CIS for almost
164 everything. In most clients, many details (i.e., number, sizes,
165 and attributes of IO windows) are fixed by the nature of the
166 device, and can be hard-wired here.
167 */
168 link->io.NumPorts1 = 8;
169 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
170 link->io.IOAddrLines = 3;
171
172 link->conf.Attributes = CONF_ENABLE_IRQ;
173 link->conf.IntType = INT_MEMORY_AND_IO;
174
175 return elsa_cs_config(link);
176 } /* elsa_cs_attach */
177
178 /*======================================================================
179
180 This deletes a driver "instance". The device is de-registered
181 with Card Services. If it has been released, all local data
182 structures are freed. Otherwise, the structures will be freed
183 when the device is released.
184
185 ======================================================================*/
186
187 static void elsa_cs_detach(struct pcmcia_device *link)
188 {
189 local_info_t *info = link->priv;
190
191 DEBUG(0, "elsa_cs_detach(0x%p)\n", link);
192
193 info->busy = 1;
194 elsa_cs_release(link);
195
196 kfree(info);
197 } /* elsa_cs_detach */
198
199 /*======================================================================
200
201 elsa_cs_config() is scheduled to run after a CARD_INSERTION event
202 is received, to configure the PCMCIA socket, and to make the
203 device available to the system.
204
205 ======================================================================*/
206
207 static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
208 cistpl_cftable_entry_t *cf,
209 cistpl_cftable_entry_t *dflt,
210 unsigned int vcc,
211 void *priv_data)
212 {
213 int j;
214
215 if ((cf->io.nwin > 0) && cf->io.win[0].base) {
216 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
217 p_dev->io.BasePort1 = cf->io.win[0].base;
218 if (!pcmcia_request_io(p_dev, &p_dev->io))
219 return 0;
220 } else {
221 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
222 for (j = 0x2f0; j > 0x100; j -= 0x10) {
223 p_dev->io.BasePort1 = j;
224 if (!pcmcia_request_io(p_dev, &p_dev->io))
225 return 0;
226 }
227 }
228 return -ENODEV;
229 }
230
231 static int elsa_cs_config(struct pcmcia_device *link)
232 {
233 local_info_t *dev;
234 int i, last_fn;
235 IsdnCard_t icard;
236
237 DEBUG(0, "elsa_config(0x%p)\n", link);
238 dev = link->priv;
239
240 i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
241 if (i != 0) {
242 last_fn = RequestIO;
243 goto cs_failed;
244 }
245
246 i = pcmcia_request_irq(link, &link->irq);
247 if (i != 0) {
248 link->irq.AssignedIRQ = 0;
249 last_fn = RequestIRQ;
250 goto cs_failed;
251 }
252
253 i = pcmcia_request_configuration(link, &link->conf);
254 if (i != 0) {
255 last_fn = RequestConfiguration;
256 goto cs_failed;
257 }
258
259 /* At this point, the dev_node_t structure(s) should be
260 initialized and arranged in a linked list at link->dev. *//* */
261 sprintf(dev->node.dev_name, "elsa");
262 dev->node.major = dev->node.minor = 0x0;
263
264 link->dev_node = &dev->node;
265
266 /* Finally, report what we've done */
267 printk(KERN_INFO "%s: index 0x%02x: ",
268 dev->node.dev_name, link->conf.ConfigIndex);
269 if (link->conf.Attributes & CONF_ENABLE_IRQ)
270 printk(", irq %d", link->irq.AssignedIRQ);
271 if (link->io.NumPorts1)
272 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
273 link->io.BasePort1+link->io.NumPorts1-1);
274 if (link->io.NumPorts2)
275 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
276 link->io.BasePort2+link->io.NumPorts2-1);
277 printk("\n");
278
279 icard.para[0] = link->irq.AssignedIRQ;
280 icard.para[1] = link->io.BasePort1;
281 icard.protocol = protocol;
282 icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
283
284 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
285 if (i < 0) {
286 printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
287 i, link->io.BasePort1);
288 elsa_cs_release(link);
289 } else
290 ((local_info_t*)link->priv)->cardnr = i;
291
292 return 0;
293 cs_failed:
294 cs_error(link, last_fn, i);
295 elsa_cs_release(link);
296 return -ENODEV;
297 } /* elsa_cs_config */
298
299 /*======================================================================
300
301 After a card is removed, elsa_cs_release() will unregister the net
302 device, and release the PCMCIA configuration. If the device is
303 still open, this will be postponed until it is closed.
304
305 ======================================================================*/
306
307 static void elsa_cs_release(struct pcmcia_device *link)
308 {
309 local_info_t *local = link->priv;
310
311 DEBUG(0, "elsa_cs_release(0x%p)\n", link);
312
313 if (local) {
314 if (local->cardnr >= 0) {
315 /* no unregister function with hisax */
316 HiSax_closecard(local->cardnr);
317 }
318 }
319
320 pcmcia_disable_device(link);
321 } /* elsa_cs_release */
322
323 static int elsa_suspend(struct pcmcia_device *link)
324 {
325 local_info_t *dev = link->priv;
326
327 dev->busy = 1;
328
329 return 0;
330 }
331
332 static int elsa_resume(struct pcmcia_device *link)
333 {
334 local_info_t *dev = link->priv;
335
336 dev->busy = 0;
337
338 return 0;
339 }
340
341 static struct pcmcia_device_id elsa_ids[] = {
342 PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
343 PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
344 PCMCIA_DEVICE_NULL
345 };
346 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
347
348 static struct pcmcia_driver elsa_cs_driver = {
349 .owner = THIS_MODULE,
350 .drv = {
351 .name = "elsa_cs",
352 },
353 .probe = elsa_cs_probe,
354 .remove = elsa_cs_detach,
355 .id_table = elsa_ids,
356 .suspend = elsa_suspend,
357 .resume = elsa_resume,
358 };
359
360 static int __init init_elsa_cs(void)
361 {
362 return pcmcia_register_driver(&elsa_cs_driver);
363 }
364
365 static void __exit exit_elsa_cs(void)
366 {
367 pcmcia_unregister_driver(&elsa_cs_driver);
368 }
369
370 module_init(init_elsa_cs);
371 module_exit(exit_elsa_cs);
372
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