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 #ifdef __IN_PCMCIA_PACKAGE__
33 #include <pcmcia/k_compat.h>
35 #include <linux/init.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/ptrace.h>
39 #include <linux/slab.h>
40 #include <linux/string.h>
41 #include <linux/netdevice.h>
42 #include <linux/moduleparam.h>
43 #include <linux/device.h>
45 #include <pcmcia/cs_types.h>
46 #include <pcmcia/cs.h>
47 #include <pcmcia/cistpl.h>
48 #include <pcmcia/cisreg.h>
49 #include <pcmcia/ds.h>
50 #include <pcmcia/ciscode.h>
53 #include <asm/system.h>
54 #include <linux/wireless.h>
59 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
60 you do not define PCMCIA_DEBUG at all, all the debug code will be
61 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
62 be present but disabled -- but it can then be enabled for specific
63 modules at load time with a 'pc_debug=#' option to insmod.
67 static int pc_debug = PCMCIA_DEBUG;
68 module_param(pc_debug, int, 0);
69 static char *version = "$Revision: 1.2 $";
70 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
72 #define DEBUG(n, args...)
75 /*====================================================================*/
77 MODULE_AUTHOR("Simon Kelley");
78 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
79 MODULE_LICENSE("GPL");
80 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
82 /*====================================================================*/
85 The event() function is this driver's Card Services event handler.
86 It will be called by Card Services when an appropriate card status
87 event is received. The config() and release() entry points are
88 used to configure or release a socket, in response to card
89 insertion and ejection events. They are invoked from the atmel_cs
93 static int atmel_config(struct pcmcia_device *link);
94 static void atmel_release(struct pcmcia_device *link);
97 The attach() and detach() entry points are used to create and destroy
98 "instances" of the driver, where each instance represents everything
99 needed to manage one actual PCMCIA card.
102 static void atmel_detach(struct pcmcia_device *p_dev);
105 You'll also need to prototype all the functions that will actually
106 be used to talk to your device. See 'pcmem_cs' for a good example
107 of a fully self-sufficient driver; the other drivers rely more or
108 less on other parts of the kernel.
112 A linked list of "instances" of the atmelnet device. Each actual
113 PCMCIA card corresponds to one device instance, and is described
114 by one struct pcmcia_device structure (defined in ds.h).
116 You may not want to use a linked list for this -- for example, the
117 memory card driver uses an array of struct pcmcia_device pointers, where minor
118 device numbers are used to derive the corresponding array index.
122 A driver needs to provide a dev_node_t structure for each device
123 on a card. In some cases, there is only one device per card (for
124 example, ethernet cards, modems). In other cases, there may be
125 many actual or logical devices (SCSI adapters, memory cards with
126 multiple partitions). The dev_node_t structures need to be kept
127 in a linked list starting at the 'dev' field of a struct pcmcia_device
128 structure. We allocate them in the card's private data structure,
129 because they generally shouldn't be allocated dynamically.
131 In this case, we also provide a flag to indicate if a device is
132 "stopped" due to a power management event, or card ejection. The
133 device IO routines can use a flag like this to throttle IO to a
134 card that is not ready to accept it.
137 typedef struct local_info_t {
139 struct net_device *eth_dev;
142 /*======================================================================
144 atmel_attach() creates an "instance" of the driver, allocating
145 local data structures for one device. The device is registered
148 The dev_link structure is initialized, but we don't actually
149 configure the card at this point -- we wait until we receive a
150 card insertion event.
152 ======================================================================*/
154 static int atmel_probe(struct pcmcia_device *p_dev)
158 DEBUG(0, "atmel_attach()\n");
160 /* Interrupt setup */
161 p_dev->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
162 p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
163 p_dev->irq.Handler = NULL;
166 General socket configuration defaults can go here. In this
167 client, we assume very little, and rely on the CIS for almost
168 everything. In most clients, many details (i.e., number, sizes,
169 and attributes of IO windows) are fixed by the nature of the
170 device, and can be hard-wired here.
172 p_dev->conf.Attributes = 0;
173 p_dev->conf.IntType = INT_MEMORY_AND_IO;
175 /* Allocate space for private device-specific data */
176 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
178 printk(KERN_ERR "atmel_cs: no memory for new device\n");
183 return atmel_config(p_dev);
186 /*======================================================================
188 This deletes a driver "instance". The device is de-registered
189 with Card Services. If it has been released, all local data
190 structures are freed. Otherwise, the structures will be freed
191 when the device is released.
193 ======================================================================*/
195 static void atmel_detach(struct pcmcia_device *link)
197 DEBUG(0, "atmel_detach(0x%p)\n", link);
204 /*======================================================================
206 atmel_config() is scheduled to run after a CARD_INSERTION event
207 is received, to configure the PCMCIA socket, and to make the
208 device available to the system.
210 ======================================================================*/
212 #define CS_CHECK(fn, ret) \
213 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
215 /* Call-back function to interrogate PCMCIA-specific information
216 about the current existance of the card */
217 static int card_present(void *arg)
219 struct pcmcia_device *link = (struct pcmcia_device *)arg;
221 if (pcmcia_dev_present(link))
227 static int atmel_config_check(struct pcmcia_device *p_dev,
228 cistpl_cftable_entry_t *cfg,
231 cistpl_cftable_entry_t *dflt = priv_data;
233 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
237 /* Does this card need audio output? */
238 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
239 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
240 p_dev->conf.Status = CCSR_AUDIO_ENA;
243 /* Use power settings for Vcc and Vpp if present */
244 /* Note that the CIS values need to be rescaled */
245 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
246 p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
247 else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
248 p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
250 /* Do we need to allocate an interrupt? */
251 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
252 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
254 /* IO window settings */
255 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
256 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
257 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
258 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
259 if (!(io->flags & CISTPL_IO_8BIT))
260 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
261 if (!(io->flags & CISTPL_IO_16BIT))
262 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
263 p_dev->io.BasePort1 = io->win[0].base;
264 p_dev->io.NumPorts1 = io->win[0].len;
266 p_dev->io.Attributes2 = p_dev->io.Attributes1;
267 p_dev->io.BasePort2 = io->win[1].base;
268 p_dev->io.NumPorts2 = io->win[1].len;
272 /* This reserves IO space but doesn't actually enable it */
273 return pcmcia_request_io(p_dev, &p_dev->io);
276 static int atmel_config(struct pcmcia_device *link)
279 int last_fn, last_ret;
280 struct pcmcia_device_id *did;
281 cistpl_cftable_entry_t dflt = { 0 };
284 did = handle_to_dev(link).driver_data;
286 DEBUG(0, "atmel_config(0x%p)\n", link);
289 In this loop, we scan the CIS for configuration table entries,
290 each of which describes a valid card configuration, including
291 voltage, IO window, memory window, and interrupt settings.
293 We make no assumptions about the card to be configured: we use
294 just the information available in the CIS. In an ideal world,
295 this would work for any PCMCIA card, but it requires a complete
296 and accurate CIS. In practice, a driver usually "knows" most of
297 these things without consulting the CIS, and most client drivers
298 will only use the CIS to fill in implementation-defined details.
300 if (pcmcia_loop_config(link, atmel_config_check, &dflt))
304 Allocate an interrupt line. Note that this does not assign a
305 handler to the interrupt, unless the 'Handler' member of the
306 irq structure is initialized.
308 if (link->conf.Attributes & CONF_ENABLE_IRQ)
309 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
312 This actually configures the PCMCIA socket -- setting up
313 the I/O windows and the interrupt mapping, and putting the
314 card and host interface into "Memory and IO" mode.
316 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
318 if (link->irq.AssignedIRQ == 0) {
320 "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
324 ((local_info_t*)link->priv)->eth_dev =
325 init_atmel_card(link->irq.AssignedIRQ,
327 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
328 &handle_to_dev(link),
331 if (!((local_info_t*)link->priv)->eth_dev)
336 At this point, the dev_node_t structure(s) need to be
337 initialized and arranged in a linked list at link->dev_node.
339 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
340 dev->node.major = dev->node.minor = 0;
341 link->dev_node = &dev->node;
346 cs_error(link, last_fn, last_ret);
352 /*======================================================================
354 After a card is removed, atmel_release() will unregister the
355 device, and release the PCMCIA configuration. If the device is
356 still open, this will be postponed until it is closed.
358 ======================================================================*/
360 static void atmel_release(struct pcmcia_device *link)
362 struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
364 DEBUG(0, "atmel_release(0x%p)\n", link);
367 stop_atmel_card(dev);
368 ((local_info_t*)link->priv)->eth_dev = NULL;
370 pcmcia_disable_device(link);
373 static int atmel_suspend(struct pcmcia_device *link)
375 local_info_t *local = link->priv;
377 netif_device_detach(local->eth_dev);
382 static int atmel_resume(struct pcmcia_device *link)
384 local_info_t *local = link->priv;
386 atmel_open(local->eth_dev);
387 netif_device_attach(local->eth_dev);
392 /*====================================================================*/
393 /* We use the driver_info field to store the correct firmware type for a card. */
395 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
396 .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
397 PCMCIA_DEV_ID_MATCH_CARD_ID, \
400 .driver_info = (kernel_ulong_t)(info), }
402 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
403 .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
404 PCMCIA_DEV_ID_MATCH_PROD_ID2, \
405 .prod_id = { (v1), (v2), NULL, NULL }, \
406 .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
407 .driver_info = (kernel_ulong_t)(info), }
409 static struct pcmcia_device_id atmel_ids[] = {
410 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
411 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
412 PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
413 PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
414 PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
415 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
416 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
417 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
418 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
419 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
420 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
421 PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
422 PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
423 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
424 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
425 PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
426 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
427 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
428 PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
429 PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
430 PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
434 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
436 static struct pcmcia_driver atmel_driver = {
437 .owner = THIS_MODULE,
441 .probe = atmel_probe,
442 .remove = atmel_detach,
443 .id_table = atmel_ids,
444 .suspend = atmel_suspend,
445 .resume = atmel_resume,
448 static int atmel_cs_init(void)
450 return pcmcia_register_driver(&atmel_driver);
453 static void atmel_cs_cleanup(void)
455 pcmcia_unregister_driver(&atmel_driver);
459 This program is free software; you can redistribute it and/or
460 modify it under the terms of the GNU General Public License
461 as published by the Free Software Foundation; either version 2
462 of the License, or (at your option) any later version.
464 This program is distributed in the hope that it will be useful,
465 but WITHOUT ANY WARRANTY; without even the implied warranty of
466 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
467 GNU General Public License for more details.
471 Redistribution and use in source and binary forms, with or without
472 modification, are permitted provided that the following conditions
475 1. Redistributions of source code must retain the above copyright
476 notice, this list of conditions and the following disclaimer.
477 2. Redistributions in binary form must reproduce the above copyright
478 notice, this list of conditions and the following disclaimer in the
479 documentation and/or other materials provided with the distribution.
480 3. The name of the author may not be used to endorse or promote
481 products derived from this software without specific prior written
484 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
485 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
486 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
487 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
488 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
489 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
490 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
491 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
492 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
493 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
494 POSSIBILITY OF SUCH DAMAGE.
497 module_init(atmel_cs_init);
498 module_exit(atmel_cs_cleanup);