1 /*** -*- linux-c -*- **********************************************************
3 Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
5 Copyright 2000-2001 ATMEL Corporation.
6 Copyright 2003 Simon Kelley.
8 This code was developed from version 2.1.1 of the Atmel drivers,
9 released by Atmel corp. under the GPL in December 2002. It also
10 includes code from the Linux aironet drivers (C) Benjamin Reed,
11 and the Linux PCMCIA package, (C) David Hinds.
13 For all queries about this code, please contact the current author,
14 Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
21 This software is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with Atmel wireless lan drivers; if not, write to the Free Software
28 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 ******************************************************************************/
32 #include <linux/config.h>
33 #ifdef __IN_PCMCIA_PACKAGE__
34 #include <pcmcia/k_compat.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/ptrace.h>
40 #include <linux/slab.h>
41 #include <linux/string.h>
42 #include <linux/netdevice.h>
43 #include <linux/moduleparam.h>
44 #include <linux/device.h>
46 #include <pcmcia/cs_types.h>
47 #include <pcmcia/cs.h>
48 #include <pcmcia/cistpl.h>
49 #include <pcmcia/cisreg.h>
50 #include <pcmcia/ds.h>
51 #include <pcmcia/ciscode.h>
54 #include <asm/system.h>
55 #include <linux/wireless.h>
60 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
61 you do not define PCMCIA_DEBUG at all, all the debug code will be
62 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
63 be present but disabled -- but it can then be enabled for specific
64 modules at load time with a 'pc_debug=#' option to insmod.
68 static int pc_debug = PCMCIA_DEBUG;
69 module_param(pc_debug, int, 0);
70 static char *version = "$Revision: 1.2 $";
71 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
73 #define DEBUG(n, args...)
76 /*====================================================================*/
78 MODULE_AUTHOR("Simon Kelley");
79 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
80 MODULE_LICENSE("GPL");
81 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
83 /*====================================================================*/
86 The event() function is this driver's Card Services event handler.
87 It will be called by Card Services when an appropriate card status
88 event is received. The config() and release() entry points are
89 used to configure or release a socket, in response to card
90 insertion and ejection events. They are invoked from the atmel_cs
94 static void atmel_config(struct pcmcia_device *link);
95 static void atmel_release(struct pcmcia_device *link);
98 The attach() and detach() entry points are used to create and destroy
99 "instances" of the driver, where each instance represents everything
100 needed to manage one actual PCMCIA card.
103 static void atmel_detach(struct pcmcia_device *p_dev);
106 You'll also need to prototype all the functions that will actually
107 be used to talk to your device. See 'pcmem_cs' for a good example
108 of a fully self-sufficient driver; the other drivers rely more or
109 less on other parts of the kernel.
113 A linked list of "instances" of the atmelnet device. Each actual
114 PCMCIA card corresponds to one device instance, and is described
115 by one struct pcmcia_device structure (defined in ds.h).
117 You may not want to use a linked list for this -- for example, the
118 memory card driver uses an array of struct pcmcia_device pointers, where minor
119 device numbers are used to derive the corresponding array index.
123 A driver needs to provide a dev_node_t structure for each device
124 on a card. In some cases, there is only one device per card (for
125 example, ethernet cards, modems). In other cases, there may be
126 many actual or logical devices (SCSI adapters, memory cards with
127 multiple partitions). The dev_node_t structures need to be kept
128 in a linked list starting at the 'dev' field of a struct pcmcia_device
129 structure. We allocate them in the card's private data structure,
130 because they generally shouldn't be allocated dynamically.
132 In this case, we also provide a flag to indicate if a device is
133 "stopped" due to a power management event, or card ejection. The
134 device IO routines can use a flag like this to throttle IO to a
135 card that is not ready to accept it.
138 typedef struct local_info_t {
140 struct net_device *eth_dev;
143 /*======================================================================
145 atmel_attach() creates an "instance" of the driver, allocating
146 local data structures for one device. The device is registered
149 The dev_link structure is initialized, but we don't actually
150 configure the card at this point -- we wait until we receive a
151 card insertion event.
153 ======================================================================*/
155 static int atmel_attach(struct pcmcia_device *p_dev)
159 DEBUG(0, "atmel_attach()\n");
161 /* Interrupt setup */
162 p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
163 p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
164 p_dev->irq.Handler = NULL;
167 General socket configuration defaults can go here. In this
168 client, we assume very little, and rely on the CIS for almost
169 everything. In most clients, many details (i.e., number, sizes,
170 and attributes of IO windows) are fixed by the nature of the
171 device, and can be hard-wired here.
173 p_dev->conf.Attributes = 0;
174 p_dev->conf.IntType = INT_MEMORY_AND_IO;
176 /* Allocate space for private device-specific data */
177 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
179 printk(KERN_ERR "atmel_cs: no memory for new device\n");
184 p_dev->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
190 /*======================================================================
192 This deletes a driver "instance". The device is de-registered
193 with Card Services. If it has been released, all local data
194 structures are freed. Otherwise, the structures will be freed
195 when the device is released.
197 ======================================================================*/
199 static void atmel_detach(struct pcmcia_device *link)
201 DEBUG(0, "atmel_detach(0x%p)\n", link);
203 if (link->state & DEV_CONFIG)
209 /*======================================================================
211 atmel_config() is scheduled to run after a CARD_INSERTION event
212 is received, to configure the PCMCIA socket, and to make the
213 device available to the system.
215 ======================================================================*/
217 #define CS_CHECK(fn, ret) \
218 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
220 /* Call-back function to interrogate PCMCIA-specific information
221 about the current existance of the card */
222 static int card_present(void *arg)
224 struct pcmcia_device *link = (struct pcmcia_device *)arg;
225 if (link->state & DEV_SUSPEND)
227 else if (link->state & DEV_PRESENT)
233 static void atmel_config(struct pcmcia_device *link)
238 int last_fn, last_ret;
240 struct pcmcia_device_id *did;
243 did = handle_to_dev(link).driver_data;
245 DEBUG(0, "atmel_config(0x%p)\n", link);
247 tuple.Attributes = 0;
248 tuple.TupleData = buf;
249 tuple.TupleDataMax = sizeof(buf);
250 tuple.TupleOffset = 0;
253 This reads the card's CONFIG tuple to find its configuration
256 tuple.DesiredTuple = CISTPL_CONFIG;
257 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
258 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
259 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
260 link->conf.ConfigBase = parse.config.base;
261 link->conf.Present = parse.config.rmask[0];
264 link->state |= DEV_CONFIG;
267 In this loop, we scan the CIS for configuration table entries,
268 each of which describes a valid card configuration, including
269 voltage, IO window, memory window, and interrupt settings.
271 We make no assumptions about the card to be configured: we use
272 just the information available in the CIS. In an ideal world,
273 this would work for any PCMCIA card, but it requires a complete
274 and accurate CIS. In practice, a driver usually "knows" most of
275 these things without consulting the CIS, and most client drivers
276 will only use the CIS to fill in implementation-defined details.
278 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
279 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
281 cistpl_cftable_entry_t dflt = { 0 };
282 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
283 if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
284 pcmcia_parse_tuple(link, &tuple, &parse) != 0)
287 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
288 if (cfg->index == 0) goto next_entry;
289 link->conf.ConfigIndex = cfg->index;
291 /* Does this card need audio output? */
292 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
293 link->conf.Attributes |= CONF_ENABLE_SPKR;
294 link->conf.Status = CCSR_AUDIO_ENA;
297 /* Use power settings for Vcc and Vpp if present */
298 /* Note that the CIS values need to be rescaled */
299 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
301 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
302 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
304 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
306 /* Do we need to allocate an interrupt? */
307 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
308 link->conf.Attributes |= CONF_ENABLE_IRQ;
310 /* IO window settings */
311 link->io.NumPorts1 = link->io.NumPorts2 = 0;
312 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
313 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
314 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
315 if (!(io->flags & CISTPL_IO_8BIT))
316 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
317 if (!(io->flags & CISTPL_IO_16BIT))
318 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
319 link->io.BasePort1 = io->win[0].base;
320 link->io.NumPorts1 = io->win[0].len;
322 link->io.Attributes2 = link->io.Attributes1;
323 link->io.BasePort2 = io->win[1].base;
324 link->io.NumPorts2 = io->win[1].len;
328 /* This reserves IO space but doesn't actually enable it */
329 if (pcmcia_request_io(link, &link->io) != 0)
332 /* If we got this far, we're cool! */
336 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
340 Allocate an interrupt line. Note that this does not assign a
341 handler to the interrupt, unless the 'Handler' member of the
342 irq structure is initialized.
344 if (link->conf.Attributes & CONF_ENABLE_IRQ)
345 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
348 This actually configures the PCMCIA socket -- setting up
349 the I/O windows and the interrupt mapping, and putting the
350 card and host interface into "Memory and IO" mode.
352 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
354 if (link->irq.AssignedIRQ == 0) {
356 "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
360 ((local_info_t*)link->priv)->eth_dev =
361 init_atmel_card(link->irq.AssignedIRQ,
363 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
364 &handle_to_dev(link),
367 if (!((local_info_t*)link->priv)->eth_dev)
372 At this point, the dev_node_t structure(s) need to be
373 initialized and arranged in a linked list at link->dev_node.
375 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
376 dev->node.major = dev->node.minor = 0;
377 link->dev_node = &dev->node;
379 link->state &= ~DEV_CONFIG_PENDING;
383 cs_error(link, last_fn, last_ret);
387 /*======================================================================
389 After a card is removed, atmel_release() will unregister the
390 device, and release the PCMCIA configuration. If the device is
391 still open, this will be postponed until it is closed.
393 ======================================================================*/
395 static void atmel_release(struct pcmcia_device *link)
397 struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
399 DEBUG(0, "atmel_release(0x%p)\n", link);
402 stop_atmel_card(dev);
403 ((local_info_t*)link->priv)->eth_dev = NULL;
405 pcmcia_disable_device(link);
408 static int atmel_suspend(struct pcmcia_device *link)
410 local_info_t *local = link->priv;
412 if (link->state & DEV_CONFIG)
413 netif_device_detach(local->eth_dev);
418 static int atmel_resume(struct pcmcia_device *link)
420 local_info_t *local = link->priv;
422 if (link->state & DEV_CONFIG) {
423 atmel_open(local->eth_dev);
424 netif_device_attach(local->eth_dev);
430 /*====================================================================*/
431 /* We use the driver_info field to store the correct firmware type for a card. */
433 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
434 .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
435 PCMCIA_DEV_ID_MATCH_CARD_ID, \
438 .driver_info = (kernel_ulong_t)(info), }
440 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
441 .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
442 PCMCIA_DEV_ID_MATCH_PROD_ID2, \
443 .prod_id = { (v1), (v2), NULL, NULL }, \
444 .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
445 .driver_info = (kernel_ulong_t)(info), }
447 static struct pcmcia_device_id atmel_ids[] = {
448 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
449 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
450 PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
451 PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
452 PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
453 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
454 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
455 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
456 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
457 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
458 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
459 PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
460 PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
461 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
462 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
463 PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
464 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
465 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
466 PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
467 PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
468 PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
472 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
474 static struct pcmcia_driver atmel_driver = {
475 .owner = THIS_MODULE,
479 .probe = atmel_attach,
480 .remove = atmel_detach,
481 .id_table = atmel_ids,
482 .suspend = atmel_suspend,
483 .resume = atmel_resume,
486 static int atmel_cs_init(void)
488 return pcmcia_register_driver(&atmel_driver);
491 static void atmel_cs_cleanup(void)
493 pcmcia_unregister_driver(&atmel_driver);
497 This program is free software; you can redistribute it and/or
498 modify it under the terms of the GNU General Public License
499 as published by the Free Software Foundation; either version 2
500 of the License, or (at your option) any later version.
502 This program is distributed in the hope that it will be useful,
503 but WITHOUT ANY WARRANTY; without even the implied warranty of
504 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
505 GNU General Public License for more details.
509 Redistribution and use in source and binary forms, with or without
510 modification, are permitted provided that the following conditions
513 1. Redistributions of source code must retain the above copyright
514 notice, this list of conditions and the following disclaimer.
515 2. Redistributions in binary form must reproduce the above copyright
516 notice, this list of conditions and the following disclaimer in the
517 documentation and/or other materials provided with the distribution.
518 3. The name of the author may not be used to endorse or promote
519 products derived from this software without specific prior written
522 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
523 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
524 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
525 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
526 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
527 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
528 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
529 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
530 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
531 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
532 POSSIBILITY OF SUCH DAMAGE.
535 module_init(atmel_cs_init);
536 module_exit(atmel_cs_cleanup);