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 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple,
207 cisparse_t *parse)
208 {
209 int i = pcmcia_get_tuple_data(handle, tuple);
210 if (i != CS_SUCCESS) return i;
211 return pcmcia_parse_tuple(handle, tuple, parse);
212 }
213
214 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple,
215 cisparse_t *parse)
216 {
217 int i = pcmcia_get_first_tuple(handle, tuple);
218 if (i != CS_SUCCESS) return i;
219 return get_tuple(handle, tuple, parse);
220 }
221
222 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple,
223 cisparse_t *parse)
224 {
225 int i = pcmcia_get_next_tuple(handle, tuple);
226 if (i != CS_SUCCESS) return i;
227 return get_tuple(handle, tuple, parse);
228 }
229
230 static int elsa_cs_config(struct pcmcia_device *link)
231 {
232 tuple_t tuple;
233 cisparse_t parse;
234 local_info_t *dev;
235 int i, j, last_fn;
236 u_short buf[128];
237 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
238 IsdnCard_t icard;
239
240 DEBUG(0, "elsa_config(0x%p)\n", link);
241 dev = link->priv;
242
243 tuple.TupleData = (cisdata_t *)buf;
244 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
245 tuple.Attributes = 0;
246 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
247 i = first_tuple(link, &tuple, &parse);
248 while (i == CS_SUCCESS) {
249 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
250 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
251 link->conf.ConfigIndex = cf->index;
252 link->io.BasePort1 = cf->io.win[0].base;
253 i = pcmcia_request_io(link, &link->io);
254 if (i == CS_SUCCESS) break;
255 } else {
256 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
257 link->conf.ConfigIndex = cf->index;
258 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
259 link->io.BasePort1 = j;
260 i = pcmcia_request_io(link, &link->io);
261 if (i == CS_SUCCESS) break;
262 }
263 break;
264 }
265 i = next_tuple(link, &tuple, &parse);
266 }
267
268 if (i != CS_SUCCESS) {
269 last_fn = RequestIO;
270 goto cs_failed;
271 }
272
273 i = pcmcia_request_irq(link, &link->irq);
274 if (i != CS_SUCCESS) {
275 link->irq.AssignedIRQ = 0;
276 last_fn = RequestIRQ;
277 goto cs_failed;
278 }
279
280 i = pcmcia_request_configuration(link, &link->conf);
281 if (i != CS_SUCCESS) {
282 last_fn = RequestConfiguration;
283 goto cs_failed;
284 }
285
286 /* At this point, the dev_node_t structure(s) should be
287 initialized and arranged in a linked list at link->dev. *//* */
288 sprintf(dev->node.dev_name, "elsa");
289 dev->node.major = dev->node.minor = 0x0;
290
291 link->dev_node = &dev->node;
292
293 /* Finally, report what we've done */
294 printk(KERN_INFO "%s: index 0x%02x: ",
295 dev->node.dev_name, link->conf.ConfigIndex);
296 if (link->conf.Attributes & CONF_ENABLE_IRQ)
297 printk(", irq %d", link->irq.AssignedIRQ);
298 if (link->io.NumPorts1)
299 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
300 link->io.BasePort1+link->io.NumPorts1-1);
301 if (link->io.NumPorts2)
302 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
303 link->io.BasePort2+link->io.NumPorts2-1);
304 printk("\n");
305
306 icard.para[0] = link->irq.AssignedIRQ;
307 icard.para[1] = link->io.BasePort1;
308 icard.protocol = protocol;
309 icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
310
311 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
312 if (i < 0) {
313 printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
314 i, link->io.BasePort1);
315 elsa_cs_release(link);
316 } else
317 ((local_info_t*)link->priv)->cardnr = i;
318
319 return 0;
320 cs_failed:
321 cs_error(link, last_fn, i);
322 elsa_cs_release(link);
323 return -ENODEV;
324 } /* elsa_cs_config */
325
326 /*======================================================================
327
328 After a card is removed, elsa_cs_release() will unregister the net
329 device, and release the PCMCIA configuration. If the device is
330 still open, this will be postponed until it is closed.
331
332 ======================================================================*/
333
334 static void elsa_cs_release(struct pcmcia_device *link)
335 {
336 local_info_t *local = link->priv;
337
338 DEBUG(0, "elsa_cs_release(0x%p)\n", link);
339
340 if (local) {
341 if (local->cardnr >= 0) {
342 /* no unregister function with hisax */
343 HiSax_closecard(local->cardnr);
344 }
345 }
346
347 pcmcia_disable_device(link);
348 } /* elsa_cs_release */
349
350 static int elsa_suspend(struct pcmcia_device *link)
351 {
352 local_info_t *dev = link->priv;
353
354 dev->busy = 1;
355
356 return 0;
357 }
358
359 static int elsa_resume(struct pcmcia_device *link)
360 {
361 local_info_t *dev = link->priv;
362
363 dev->busy = 0;
364
365 return 0;
366 }
367
368 static struct pcmcia_device_id elsa_ids[] = {
369 PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
370 PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
371 PCMCIA_DEVICE_NULL
372 };
373 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
374
375 static struct pcmcia_driver elsa_cs_driver = {
376 .owner = THIS_MODULE,
377 .drv = {
378 .name = "elsa_cs",
379 },
380 .probe = elsa_cs_probe,
381 .remove = elsa_cs_detach,
382 .id_table = elsa_ids,
383 .suspend = elsa_suspend,
384 .resume = elsa_resume,
385 };
386
387 static int __init init_elsa_cs(void)
388 {
389 return pcmcia_register_driver(&elsa_cs_driver);
390 }
391
392 static void __exit exit_elsa_cs(void)
393 {
394 pcmcia_unregister_driver(&elsa_cs_driver);
395 }
396
397 module_init(init_elsa_cs);
398 module_exit(exit_elsa_cs);
399
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