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 #ifdef __IN_PCMCIA_PACKAGE__
24 #include <pcmcia/k_compat.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/ptrace.h>
30 #include <linux/slab.h>
31 #include <linux/string.h>
32 #include <linux/timer.h>
33 #include <linux/netdevice.h>
35 #include <pcmcia/cs_types.h>
36 #include <pcmcia/cs.h>
37 #include <pcmcia/cistpl.h>
38 #include <pcmcia/cisreg.h>
39 #include <pcmcia/ds.h>
42 #include <asm/system.h>
47 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
48 you do not define PCMCIA_DEBUG at all, all the debug code will be
49 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
50 be present but disabled -- but it can then be enabled for specific
51 modules at load time with a 'pc_debug=#' option to insmod.
54 static int pc_debug = PCMCIA_DEBUG;
55 module_param(pc_debug, int, 0);
56 static char *version = "$Revision: 1.2 $";
57 #define DEBUG(n, args...) if (pc_debug > (n)) printk(KERN_DEBUG args);
59 #define DEBUG(n, args...)
62 /*====================================================================*/
64 MODULE_AUTHOR("Benjamin Reed");
65 MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet "
66 "cards. This is the module that links the PCMCIA card "
67 "with the airo module.");
68 MODULE_LICENSE("Dual BSD/GPL");
69 MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");
71 /*====================================================================*/
74 The event() function is this driver's Card Services event handler.
75 It will be called by Card Services when an appropriate card status
76 event is received. The config() and release() entry points are
77 used to configure or release a socket, in response to card
78 insertion and ejection events. They are invoked from the airo_cs
82 static int airo_config(struct pcmcia_device *link);
83 static void airo_release(struct pcmcia_device *link);
86 The attach() and detach() entry points are used to create and destroy
87 "instances" of the driver, where each instance represents everything
88 needed to manage one actual PCMCIA card.
91 static void airo_detach(struct pcmcia_device *p_dev);
94 You'll also need to prototype all the functions that will actually
95 be used to talk to your device. See 'pcmem_cs' for a good example
96 of a fully self-sufficient driver; the other drivers rely more or
97 less on other parts of the kernel.
101 A linked list of "instances" of the aironet device. Each actual
102 PCMCIA card corresponds to one device instance, and is described
103 by one struct pcmcia_device structure (defined in ds.h).
105 You may not want to use a linked list for this -- for example, the
106 memory card driver uses an array of struct pcmcia_device pointers,
107 where minor device numbers are used to derive the corresponding
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_DYNAMIC_SHARING;
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_cs_config_check(struct pcmcia_device *p_dev,
211 cistpl_cftable_entry_t *cfg,
212 cistpl_cftable_entry_t *dflt,
216 win_req_t *req = priv_data;
221 /* Does this card need audio output? */
222 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
223 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
224 p_dev->conf.Status = CCSR_AUDIO_ENA;
227 /* Use power settings for Vcc and Vpp if present */
228 /* Note that the CIS values need to be rescaled */
229 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
230 p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
231 else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
232 p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
234 /* Do we need to allocate an interrupt? */
235 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
236 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
238 /* IO window settings */
239 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
240 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
241 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
242 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
243 if (!(io->flags & CISTPL_IO_8BIT))
244 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
245 if (!(io->flags & CISTPL_IO_16BIT))
246 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
247 p_dev->io.BasePort1 = io->win[0].base;
248 p_dev->io.NumPorts1 = io->win[0].len;
250 p_dev->io.Attributes2 = p_dev->io.Attributes1;
251 p_dev->io.BasePort2 = io->win[1].base;
252 p_dev->io.NumPorts2 = io->win[1].len;
256 /* This reserves IO space but doesn't actually enable it */
257 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
261 Now set up a common memory window, if needed. There is room
262 in the struct pcmcia_device structure for one memory window handle,
263 but if the base addresses need to be saved, or if multiple
264 windows are needed, the info should go in the private data
265 structure for this device.
267 Note that the memory window base is a physical address, and
268 needs to be mapped to virtual space with ioremap() before it
271 if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) {
272 cistpl_mem_t *mem = (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
274 req->Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
275 req->Base = mem->win[0].host_addr;
276 req->Size = mem->win[0].len;
277 req->AccessSpeed = 0;
278 if (pcmcia_request_window(&p_dev, req, &p_dev->win) != 0)
281 map.CardOffset = mem->win[0].card_addr;
282 if (pcmcia_map_mem_page(p_dev->win, &map) != 0)
285 /* If we got this far, we're cool! */
290 static int airo_config(struct pcmcia_device *link)
294 int last_fn, last_ret;
298 DEBUG(0, "airo_config(0x%p)\n", link);
300 req = kzalloc(sizeof(win_req_t), GFP_KERNEL);
305 * In this loop, we scan the CIS for configuration table
306 * entries, each of which describes a valid card
307 * configuration, including voltage, IO window, memory window,
308 * and interrupt settings.
310 * We make no assumptions about the card to be configured: we
311 * use just the information available in the CIS. In an ideal
312 * world, this would work for any PCMCIA card, but it requires
313 * a complete and accurate CIS. In practice, a driver usually
314 * "knows" most of these things without consulting the CIS,
315 * and most client drivers will only use the CIS to fill in
316 * implementation-defined details.
318 last_ret = pcmcia_loop_config(link, airo_cs_config_check, req);
323 Allocate an interrupt line. Note that this does not assign a
324 handler to the interrupt, unless the 'Handler' member of the
325 irq structure is initialized.
327 if (link->conf.Attributes & CONF_ENABLE_IRQ)
328 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
331 This actually configures the PCMCIA socket -- setting up
332 the I/O windows and the interrupt mapping, and putting the
333 card and host interface into "Memory and IO" mode.
335 CS_CHECK(RequestConfiguration,
336 pcmcia_request_configuration(link, &link->conf));
337 ((local_info_t *)link->priv)->eth_dev =
338 init_airo_card(link->irq.AssignedIRQ,
339 link->io.BasePort1, 1, &handle_to_dev(link));
340 if (!((local_info_t *)link->priv)->eth_dev)
344 At this point, the dev_node_t structure(s) need to be
345 initialized and arranged in a linked list at link->dev_node.
347 strcpy(dev->node.dev_name, ((local_info_t *)link->priv)->eth_dev->name);
348 dev->node.major = dev->node.minor = 0;
349 link->dev_node = &dev->node;
351 /* Finally, report what we've done */
352 printk(KERN_INFO "%s: index 0x%02x: ",
353 dev->node.dev_name, link->conf.ConfigIndex);
355 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
356 if (link->conf.Attributes & CONF_ENABLE_IRQ)
357 printk(", irq %d", link->irq.AssignedIRQ);
358 if (link->io.NumPorts1)
359 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
360 link->io.BasePort1+link->io.NumPorts1-1);
361 if (link->io.NumPorts2)
362 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
363 link->io.BasePort2+link->io.NumPorts2-1);
365 printk(", mem 0x%06lx-0x%06lx", req->Base,
366 req->Base+req->Size-1);
372 cs_error(link, last_fn, last_ret);
379 /*======================================================================
381 After a card is removed, airo_release() will unregister the
382 device, and release the PCMCIA configuration. If the device is
383 still open, this will be postponed until it is closed.
385 ======================================================================*/
387 static void airo_release(struct pcmcia_device *link)
389 DEBUG(0, "airo_release(0x%p)\n", link);
390 pcmcia_disable_device(link);
393 static int airo_suspend(struct pcmcia_device *link)
395 local_info_t *local = link->priv;
397 netif_device_detach(local->eth_dev);
402 static int airo_resume(struct pcmcia_device *link)
404 local_info_t *local = link->priv;
407 reset_airo_card(local->eth_dev);
408 netif_device_attach(local->eth_dev);
414 static struct pcmcia_device_id airo_ids[] = {
415 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x000a),
416 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0005),
417 PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0007),
418 PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0007),
421 MODULE_DEVICE_TABLE(pcmcia, airo_ids);
423 static struct pcmcia_driver airo_driver = {
424 .owner = THIS_MODULE,
429 .remove = airo_detach,
430 .id_table = airo_ids,
431 .suspend = airo_suspend,
432 .resume = airo_resume,
435 static int airo_cs_init(void)
437 return pcmcia_register_driver(&airo_driver);
440 static void airo_cs_cleanup(void)
442 pcmcia_unregister_driver(&airo_driver);
446 This program is free software; you can redistribute it and/or
447 modify it under the terms of the GNU General Public License
448 as published by the Free Software Foundation; either version 2
449 of the License, or (at your option) any later version.
451 This program is distributed in the hope that it will be useful,
452 but WITHOUT ANY WARRANTY; without even the implied warranty of
453 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
454 GNU General Public License for more details.
458 Redistribution and use in source and binary forms, with or without
459 modification, are permitted provided that the following conditions
462 1. Redistributions of source code must retain the above copyright
463 notice, this list of conditions and the following disclaimer.
464 2. Redistributions in binary form must reproduce the above copyright
465 notice, this list of conditions and the following disclaimer in the
466 documentation and/or other materials provided with the distribution.
467 3. The name of the author may not be used to endorse or promote
468 products derived from this software without specific prior written
471 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
472 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
473 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
474 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
475 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
476 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
477 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
478 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
479 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
480 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
481 POSSIBILITY OF SUCH DAMAGE.
484 module_init(airo_cs_init);
485 module_exit(airo_cs_cleanup);