1 /*======================================================================
3 Aironet driver for 4500 and 4800 series cards
5 This code is released under both the GPL version 2 and BSD licenses.
6 Either license may be used. The respective licenses are found at
9 This code was developed by Benjamin Reed <breed@users.sourceforge.net>
10 including portions of which come from the Aironet PC4500
11 Developer's Reference Manual and used with permission. Copyright
12 (C) 1999 Benjamin Reed. All Rights Reserved. Permission to use
13 code in the Developer's manual was granted for this driver by
16 In addition this module was derived from dummy_cs.
17 The initial developer of dummy_cs is David A. Hinds
18 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
19 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
21 ======================================================================*/
23 #include <linux/config.h>
24 #ifdef __IN_PCMCIA_PACKAGE__
25 #include <pcmcia/k_compat.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/ptrace.h>
31 #include <linux/slab.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/netdevice.h>
36 #include <pcmcia/cs_types.h>
37 #include <pcmcia/cs.h>
38 #include <pcmcia/cistpl.h>
39 #include <pcmcia/cisreg.h>
40 #include <pcmcia/ds.h>
43 #include <asm/system.h>
48 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
49 you do not define PCMCIA_DEBUG at all, all the debug code will be
50 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
51 be present but disabled -- but it can then be enabled for specific
52 modules at load time with a 'pc_debug=#' option to insmod.
55 static int pc_debug = PCMCIA_DEBUG;
56 module_param(pc_debug, int, 0);
57 static char *version = "$Revision: 1.2 $";
58 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
60 #define DEBUG(n, args...)
63 /*====================================================================*/
65 MODULE_AUTHOR("Benjamin Reed");
66 MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet \
67 cards. This is the module that links the PCMCIA card \
68 with the airo module.");
69 MODULE_LICENSE("Dual BSD/GPL");
70 MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");
72 /*====================================================================*/
75 The event() function is this driver's Card Services event handler.
76 It will be called by Card Services when an appropriate card status
77 event is received. The config() and release() entry points are
78 used to configure or release a socket, in response to card
79 insertion and ejection events. They are invoked from the airo_cs
83 static int airo_config(struct pcmcia_device *link);
84 static void airo_release(struct pcmcia_device *link);
87 The attach() and detach() entry points are used to create and destroy
88 "instances" of the driver, where each instance represents everything
89 needed to manage one actual PCMCIA card.
92 static void airo_detach(struct pcmcia_device *p_dev);
95 You'll also need to prototype all the functions that will actually
96 be used to talk to your device. See 'pcmem_cs' for a good example
97 of a fully self-sufficient driver; the other drivers rely more or
98 less on other parts of the kernel.
102 A linked list of "instances" of the aironet device. Each actual
103 PCMCIA card corresponds to one device instance, and is described
104 by one struct pcmcia_device structure (defined in ds.h).
106 You may not want to use a linked list for this -- for example, the
107 memory card driver uses an array of struct pcmcia_device pointers, where minor
108 device numbers are used to derive the corresponding array index.
112 A driver needs to provide a dev_node_t structure for each device
113 on a card. In some cases, there is only one device per card (for
114 example, ethernet cards, modems). In other cases, there may be
115 many actual or logical devices (SCSI adapters, memory cards with
116 multiple partitions). The dev_node_t structures need to be kept
117 in a linked list starting at the 'dev' field of a struct pcmcia_device
118 structure. We allocate them in the card's private data structure,
119 because they generally shouldn't be allocated dynamically.
121 In this case, we also provide a flag to indicate if a device is
122 "stopped" due to a power management event, or card ejection. The
123 device IO routines can use a flag like this to throttle IO to a
124 card that is not ready to accept it.
127 typedef struct local_info_t {
129 struct net_device *eth_dev;
132 /*======================================================================
134 airo_attach() creates an "instance" of the driver, allocating
135 local data structures for one device. The device is registered
138 The dev_link structure is initialized, but we don't actually
139 configure the card at this point -- we wait until we receive a
140 card insertion event.
142 ======================================================================*/
144 static int airo_probe(struct pcmcia_device *p_dev)
148 DEBUG(0, "airo_attach()\n");
150 /* Interrupt setup */
151 p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
152 p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
153 p_dev->irq.Handler = NULL;
156 General socket configuration defaults can go here. In this
157 client, we assume very little, and rely on the CIS for almost
158 everything. In most clients, many details (i.e., number, sizes,
159 and attributes of IO windows) are fixed by the nature of the
160 device, and can be hard-wired here.
162 p_dev->conf.Attributes = 0;
163 p_dev->conf.IntType = INT_MEMORY_AND_IO;
165 /* Allocate space for private device-specific data */
166 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
168 printk(KERN_ERR "airo_cs: no memory for new device\n");
173 return airo_config(p_dev);
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 airo_detach(struct pcmcia_device *link)
187 DEBUG(0, "airo_detach(0x%p)\n", link);
191 if ( ((local_info_t*)link->priv)->eth_dev ) {
192 stop_airo_card( ((local_info_t*)link->priv)->eth_dev, 0 );
194 ((local_info_t*)link->priv)->eth_dev = NULL;
199 /*======================================================================
201 airo_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.
205 ======================================================================*/
207 #define CS_CHECK(fn, ret) \
208 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
210 static int airo_config(struct pcmcia_device *link)
215 int last_fn, last_ret;
222 DEBUG(0, "airo_config(0x%p)\n", link);
225 This reads the card's CONFIG tuple to find its configuration
228 tuple.DesiredTuple = CISTPL_CONFIG;
229 tuple.Attributes = 0;
230 tuple.TupleData = buf;
231 tuple.TupleDataMax = sizeof(buf);
232 tuple.TupleOffset = 0;
233 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
234 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
235 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
236 link->conf.ConfigBase = parse.config.base;
237 link->conf.Present = parse.config.rmask[0];
240 In this loop, we scan the CIS for configuration table entries,
241 each of which describes a valid card configuration, including
242 voltage, IO window, memory window, and interrupt settings.
244 We make no assumptions about the card to be configured: we use
245 just the information available in the CIS. In an ideal world,
246 this would work for any PCMCIA card, but it requires a complete
247 and accurate CIS. In practice, a driver usually "knows" most of
248 these things without consulting the CIS, and most client drivers
249 will only use the CIS to fill in implementation-defined details.
251 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
252 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
254 cistpl_cftable_entry_t dflt = { 0 };
255 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
256 if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
257 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
260 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
261 if (cfg->index == 0) goto next_entry;
262 link->conf.ConfigIndex = cfg->index;
264 /* Does this card need audio output? */
265 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
266 link->conf.Attributes |= CONF_ENABLE_SPKR;
267 link->conf.Status = CCSR_AUDIO_ENA;
270 /* Use power settings for Vcc and Vpp if present */
271 /* Note that the CIS values need to be rescaled */
272 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
274 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
275 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
277 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
279 /* Do we need to allocate an interrupt? */
280 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
281 link->conf.Attributes |= CONF_ENABLE_IRQ;
283 /* IO window settings */
284 link->io.NumPorts1 = link->io.NumPorts2 = 0;
285 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
286 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
287 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
288 if (!(io->flags & CISTPL_IO_8BIT))
289 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
290 if (!(io->flags & CISTPL_IO_16BIT))
291 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
292 link->io.BasePort1 = io->win[0].base;
293 link->io.NumPorts1 = io->win[0].len;
295 link->io.Attributes2 = link->io.Attributes1;
296 link->io.BasePort2 = io->win[1].base;
297 link->io.NumPorts2 = io->win[1].len;
301 /* This reserves IO space but doesn't actually enable it */
302 if (pcmcia_request_io(link, &link->io) != 0)
306 Now set up a common memory window, if needed. There is room
307 in the struct pcmcia_device structure for one memory window handle,
308 but if the base addresses need to be saved, or if multiple
309 windows are needed, the info should go in the private data
310 structure for this device.
312 Note that the memory window base is a physical address, and
313 needs to be mapped to virtual space with ioremap() before it
316 if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
318 (cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
319 req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
320 req.Base = mem->win[0].host_addr;
321 req.Size = mem->win[0].len;
323 if (pcmcia_request_window(&link, &req, &link->win) != 0)
325 map.Page = 0; map.CardOffset = mem->win[0].card_addr;
326 if (pcmcia_map_mem_page(link->win, &map) != 0)
329 /* If we got this far, we're cool! */
333 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
337 Allocate an interrupt line. Note that this does not assign a
338 handler to the interrupt, unless the 'Handler' member of the
339 irq structure is initialized.
341 if (link->conf.Attributes & CONF_ENABLE_IRQ)
342 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
345 This actually configures the PCMCIA socket -- setting up
346 the I/O windows and the interrupt mapping, and putting the
347 card and host interface into "Memory and IO" mode.
349 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
350 ((local_info_t*)link->priv)->eth_dev =
351 init_airo_card( link->irq.AssignedIRQ,
352 link->io.BasePort1, 1, &handle_to_dev(link) );
353 if (!((local_info_t*)link->priv)->eth_dev) goto cs_failed;
356 At this point, the dev_node_t structure(s) need to be
357 initialized and arranged in a linked list at link->dev_node.
359 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
360 dev->node.major = dev->node.minor = 0;
361 link->dev_node = &dev->node;
363 /* Finally, report what we've done */
364 printk(KERN_INFO "%s: index 0x%02x: ",
365 dev->node.dev_name, link->conf.ConfigIndex);
367 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
368 if (link->conf.Attributes & CONF_ENABLE_IRQ)
369 printk(", irq %d", link->irq.AssignedIRQ);
370 if (link->io.NumPorts1)
371 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
372 link->io.BasePort1+link->io.NumPorts1-1);
373 if (link->io.NumPorts2)
374 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
375 link->io.BasePort2+link->io.NumPorts2-1);
377 printk(", mem 0x%06lx-0x%06lx", req.Base,
378 req.Base+req.Size-1);
383 cs_error(link, last_fn, last_ret);
388 /*======================================================================
390 After a card is removed, airo_release() will unregister the
391 device, and release the PCMCIA configuration. If the device is
392 still open, this will be postponed until it is closed.
394 ======================================================================*/
396 static void airo_release(struct pcmcia_device *link)
398 DEBUG(0, "airo_release(0x%p)\n", link);
399 pcmcia_disable_device(link);
402 static int airo_suspend(struct pcmcia_device *link)
404 local_info_t *local = link->priv;
406 netif_device_detach(local->eth_dev);
411 static int airo_resume(struct pcmcia_device *link)
413 local_info_t *local = link->priv;
416 reset_airo_card(local->eth_dev);
417 netif_device_attach(local->eth_dev);
423 static struct pcmcia_device_id airo_ids[] = {
424 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x000a),
425 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0005),
426 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0007),
427 PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0007),
430 MODULE_DEVICE_TABLE(pcmcia, airo_ids);
432 static struct pcmcia_driver airo_driver = {
433 .owner = THIS_MODULE,
438 .remove = airo_detach,
439 .id_table = airo_ids,
440 .suspend = airo_suspend,
441 .resume = airo_resume,
444 static int airo_cs_init(void)
446 return pcmcia_register_driver(&airo_driver);
449 static void airo_cs_cleanup(void)
451 pcmcia_unregister_driver(&airo_driver);
455 This program is free software; you can redistribute it and/or
456 modify it under the terms of the GNU General Public License
457 as published by the Free Software Foundation; either version 2
458 of the License, or (at your option) any later version.
460 This program is distributed in the hope that it will be useful,
461 but WITHOUT ANY WARRANTY; without even the implied warranty of
462 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
463 GNU General Public License for more details.
467 Redistribution and use in source and binary forms, with or without
468 modification, are permitted provided that the following conditions
471 1. Redistributions of source code must retain the above copyright
472 notice, this list of conditions and the following disclaimer.
473 2. Redistributions in binary form must reproduce the above copyright
474 notice, this list of conditions and the following disclaimer in the
475 documentation and/or other materials provided with the distribution.
476 3. The name of the author may not be used to endorse or promote
477 products derived from this software without specific prior written
480 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
481 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
482 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
483 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
484 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
485 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
486 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
487 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
488 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
489 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
490 POSSIBILITY OF SUCH DAMAGE.
493 module_init(airo_cs_init);
494 module_exit(airo_cs_cleanup);