1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
2 /*======================================================================
4 A teles S0 PCMCIA client driver
6 Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
7 Written by Christof Petig, christof.petig@wtal.de
9 Also inspired by ELSA PCMCIA driver
10 by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
12 Extentions to new hisax_pcmcia by Karsten Keil
14 minor changes to be compatible with kernel 2.4.x
15 by Jan.Schubert@GMX.li
17 ======================================================================*/
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/sched.h>
23 #include <linux/ptrace.h>
24 #include <linux/slab.h>
25 #include <linux/string.h>
26 #include <linux/timer.h>
27 #include <linux/ioport.h>
29 #include <asm/system.h>
31 #include <pcmcia/cs_types.h>
32 #include <pcmcia/cs.h>
33 #include <pcmcia/cistpl.h>
34 #include <pcmcia/cisreg.h>
35 #include <pcmcia/ds.h>
36 #include "hisax_cfg.h"
38 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
39 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
40 MODULE_LICENSE("GPL");
43 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
44 you do not define PCMCIA_DEBUG at all, all the debug code will be
45 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
46 be present but disabled -- but it can then be enabled for specific
47 modules at load time with a 'pc_debug=#' option to insmod.
51 static int pc_debug = PCMCIA_DEBUG;
52 module_param(pc_debug, int, 0);
53 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
54 static char *version =
55 "teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
57 #define DEBUG(n, args...)
60 /*====================================================================*/
62 /* Parameters that can be set with 'insmod' */
64 static int protocol = 2; /* EURO-ISDN Default */
65 module_param(protocol, int, 0);
67 /*====================================================================*/
70 The event() function is this driver's Card Services event handler.
71 It will be called by Card Services when an appropriate card status
72 event is received. The config() and release() entry points are
73 used to configure or release a socket, in response to card insertion
74 and ejection events. They are invoked from the teles_cs event
78 static void teles_cs_config(dev_link_t *link);
79 static void teles_cs_release(dev_link_t *link);
82 The attach() and detach() entry points are used to create and destroy
83 "instances" of the driver, where each instance represents everything
84 needed to manage one actual PCMCIA card.
87 static void teles_detach(struct pcmcia_device *p_dev);
90 A linked list of "instances" of the teles_cs device. Each actual
91 PCMCIA card corresponds to one device instance, and is described
92 by one dev_link_t structure (defined in ds.h).
94 You may not want to use a linked list for this -- for example, the
95 memory card driver uses an array of dev_link_t pointers, where minor
96 device numbers are used to derive the corresponding array index.
100 A driver needs to provide a dev_node_t structure for each device
101 on a card. In some cases, there is only one device per card (for
102 example, ethernet cards, modems). In other cases, there may be
103 many actual or logical devices (SCSI adapters, memory cards with
104 multiple partitions). The dev_node_t structures need to be kept
105 in a linked list starting at the 'dev' field of a dev_link_t
106 structure. We allocate them in the card's private data structure,
107 because they generally shouldn't be allocated dynamically.
108 In this case, we also provide a flag to indicate if a device is
109 "stopped" due to a power management event, or card ejection. The
110 device IO routines can use a flag like this to throttle IO to a
111 card that is not ready to accept it.
114 typedef struct local_info_t {
121 /*======================================================================
123 teles_attach() creates an "instance" of the driver, allocatingx
124 local data structures for one device. The device is registered
127 The dev_link structure is initialized, but we don't actually
128 configure the card at this point -- we wait until we receive a
129 card insertion event.
131 ======================================================================*/
133 static int teles_attach(struct pcmcia_device *p_dev)
138 DEBUG(0, "teles_attach()\n");
140 /* Allocate space for private device-specific data */
141 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
142 if (!local) return -ENOMEM;
143 memset(local, 0, sizeof(local_info_t));
145 link = &local->link; link->priv = local;
147 /* Interrupt setup */
148 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
149 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
150 link->irq.Handler = NULL;
153 General socket configuration defaults can go here. In this
154 client, we assume very little, and rely on the CIS for almost
155 everything. In most clients, many details (i.e., number, sizes,
156 and attributes of IO windows) are fixed by the nature of the
157 device, and can be hard-wired here.
159 link->io.NumPorts1 = 96;
160 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
161 link->io.IOAddrLines = 5;
163 link->conf.Attributes = CONF_ENABLE_IRQ;
165 link->conf.IntType = INT_MEMORY_AND_IO;
167 link->handle = p_dev;
168 p_dev->instance = link;
170 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
171 teles_cs_config(link);
176 /*======================================================================
178 This deletes a driver "instance". The device is de-registered
179 with Card Services. If it has been released, all local data
180 structures are freed. Otherwise, the structures will be freed
181 when the device is released.
183 ======================================================================*/
185 static void teles_detach(struct pcmcia_device *p_dev)
187 dev_link_t *link = dev_to_instance(p_dev);
188 local_info_t *info = link->priv;
190 DEBUG(0, "teles_detach(0x%p)\n", link);
192 if (link->state & DEV_CONFIG) {
194 teles_cs_release(link);
201 /*======================================================================
203 teles_cs_config() is scheduled to run after a CARD_INSERTION event
204 is received, to configure the PCMCIA socket, and to make the
205 device available to the system.
207 ======================================================================*/
208 static int get_tuple(client_handle_t handle, tuple_t *tuple,
211 int i = pcmcia_get_tuple_data(handle, tuple);
212 if (i != CS_SUCCESS) return i;
213 return pcmcia_parse_tuple(handle, tuple, parse);
216 static int first_tuple(client_handle_t handle, tuple_t *tuple,
219 int i = pcmcia_get_first_tuple(handle, tuple);
220 if (i != CS_SUCCESS) return i;
221 return get_tuple(handle, tuple, parse);
224 static int next_tuple(client_handle_t handle, tuple_t *tuple,
227 int i = pcmcia_get_next_tuple(handle, tuple);
228 if (i != CS_SUCCESS) return i;
229 return get_tuple(handle, tuple, parse);
232 static void teles_cs_config(dev_link_t *link)
234 client_handle_t handle;
240 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
243 DEBUG(0, "teles_config(0x%p)\n", link);
244 handle = link->handle;
248 This reads the card's CONFIG tuple to find its configuration
251 tuple.DesiredTuple = CISTPL_CONFIG;
252 tuple.TupleData = (cisdata_t *)buf;
253 tuple.TupleDataMax = 255;
254 tuple.TupleOffset = 0;
255 tuple.Attributes = 0;
256 i = first_tuple(handle, &tuple, &parse);
257 if (i != CS_SUCCESS) {
258 last_fn = ParseTuple;
261 link->conf.ConfigBase = parse.config.base;
262 link->conf.Present = parse.config.rmask[0];
265 link->state |= DEV_CONFIG;
267 tuple.TupleData = (cisdata_t *)buf;
268 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
269 tuple.Attributes = 0;
270 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
271 i = first_tuple(handle, &tuple, &parse);
272 while (i == CS_SUCCESS) {
273 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
274 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
275 link->conf.ConfigIndex = cf->index;
276 link->io.BasePort1 = cf->io.win[0].base;
277 i = pcmcia_request_io(link->handle, &link->io);
278 if (i == CS_SUCCESS) break;
280 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
281 link->conf.ConfigIndex = cf->index;
282 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
283 link->io.BasePort1 = j;
284 i = pcmcia_request_io(link->handle, &link->io);
285 if (i == CS_SUCCESS) break;
289 i = next_tuple(handle, &tuple, &parse);
292 if (i != CS_SUCCESS) {
297 i = pcmcia_request_irq(link->handle, &link->irq);
298 if (i != CS_SUCCESS) {
299 link->irq.AssignedIRQ = 0;
300 last_fn = RequestIRQ;
304 i = pcmcia_request_configuration(link->handle, &link->conf);
305 if (i != CS_SUCCESS) {
306 last_fn = RequestConfiguration;
310 /* At this point, the dev_node_t structure(s) should be
311 initialized and arranged in a linked list at link->dev. *//* */
312 sprintf(dev->node.dev_name, "teles");
313 dev->node.major = dev->node.minor = 0x0;
315 link->dev = &dev->node;
317 /* Finally, report what we've done */
318 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
319 dev->node.dev_name, link->conf.ConfigIndex,
320 link->conf.Vcc/10, link->conf.Vcc%10);
322 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
323 if (link->conf.Attributes & CONF_ENABLE_IRQ)
324 printk(", irq %d", link->irq.AssignedIRQ);
325 if (link->io.NumPorts1)
326 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
327 link->io.BasePort1+link->io.NumPorts1-1);
328 if (link->io.NumPorts2)
329 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
330 link->io.BasePort2+link->io.NumPorts2-1);
333 link->state &= ~DEV_CONFIG_PENDING;
335 icard.para[0] = link->irq.AssignedIRQ;
336 icard.para[1] = link->io.BasePort1;
337 icard.protocol = protocol;
338 icard.typ = ISDN_CTYPE_TELESPCMCIA;
340 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
342 printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
343 i, link->io.BasePort1);
344 teles_cs_release(link);
346 ((local_info_t*)link->priv)->cardnr = i;
350 cs_error(link->handle, last_fn, i);
351 teles_cs_release(link);
352 } /* teles_cs_config */
354 /*======================================================================
356 After a card is removed, teles_cs_release() will unregister the net
357 device, and release the PCMCIA configuration. If the device is
358 still open, this will be postponed until it is closed.
360 ======================================================================*/
362 static void teles_cs_release(dev_link_t *link)
364 local_info_t *local = link->priv;
366 DEBUG(0, "teles_cs_release(0x%p)\n", link);
369 if (local->cardnr >= 0) {
370 /* no unregister function with hisax */
371 HiSax_closecard(local->cardnr);
374 /* Unlink the device chain */
377 /* Don't bother checking to see if these succeed or not */
379 pcmcia_release_window(link->win);
380 pcmcia_release_configuration(link->handle);
381 pcmcia_release_io(link->handle, &link->io);
382 pcmcia_release_irq(link->handle, &link->irq);
383 link->state &= ~DEV_CONFIG;
384 } /* teles_cs_release */
386 static int teles_suspend(struct pcmcia_device *p_dev)
388 dev_link_t *link = dev_to_instance(p_dev);
389 local_info_t *dev = link->priv;
391 link->state |= DEV_SUSPEND;
393 if (link->state & DEV_CONFIG)
394 pcmcia_release_configuration(link->handle);
399 static int teles_resume(struct pcmcia_device *p_dev)
401 dev_link_t *link = dev_to_instance(p_dev);
402 local_info_t *dev = link->priv;
404 link->state &= ~DEV_SUSPEND;
405 if (link->state & DEV_CONFIG)
406 pcmcia_request_configuration(link->handle, &link->conf);
413 static struct pcmcia_device_id teles_ids[] = {
414 PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
417 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
419 static struct pcmcia_driver teles_cs_driver = {
420 .owner = THIS_MODULE,
424 .probe = teles_attach,
425 .remove = teles_detach,
426 .id_table = teles_ids,
427 .suspend = teles_suspend,
428 .resume = teles_resume,
431 static int __init init_teles_cs(void)
433 return pcmcia_register_driver(&teles_cs_driver);
436 static void __exit exit_teles_cs(void)
438 pcmcia_unregister_driver(&teles_cs_driver);
441 module_init(init_teles_cs);
442 module_exit(exit_teles_cs);