1 /*** -*- linux-c -*- **********************************************************
2
3 Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
4
5 Copyright 2000-2001 ATMEL Corporation.
6 Copyright 2003 Simon Kelley.
7
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.
12
13 For all queries about this code, please contact the current author,
14 Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
15
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.
20
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.
25
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
29
30 ******************************************************************************/
31
32 #ifdef __IN_PCMCIA_PACKAGE__
33 #include <pcmcia/k_compat.h>
34 #endif
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>
44
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>
51
52 #include <asm/io.h>
53 #include <asm/system.h>
54 #include <linux/wireless.h>
55
56 #include "atmel.h"
57
58 /*
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.
64 */
65
66 #ifdef PCMCIA_DEBUG
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);
71 #else
72 #define DEBUG(n, args...)
73 #endif
74
75 /*====================================================================*/
76
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");
81
82 /*====================================================================*/
83
84 /*
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
90 event handler.
91 */
92
93 static int atmel_config(struct pcmcia_device *link);
94 static void atmel_release(struct pcmcia_device *link);
95
96 /*
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.
100 */
101
102 static void atmel_detach(struct pcmcia_device *p_dev);
103
104 /*
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.
109 */
110
111 /*
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).
115
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.
119 */
120
121 /*
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.
130
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.
135 */
136
137 typedef struct local_info_t {
138 dev_node_t node;
139 struct net_device *eth_dev;
140 } local_info_t;
141
142 /*======================================================================
143
144 atmel_attach() creates an "instance" of the driver, allocating
145 local data structures for one device. The device is registered
146 with Card Services.
147
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.
151
152 ======================================================================*/
153
154 static int atmel_probe(struct pcmcia_device *p_dev)
155 {
156 local_info_t *local;
157
158 DEBUG(0, "atmel_attach()\n");
159
160 /* Interrupt setup */
161 p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
162 p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
163 p_dev->irq.Handler = NULL;
164
165 /*
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.
171 */
172 p_dev->conf.Attributes = 0;
173 p_dev->conf.IntType = INT_MEMORY_AND_IO;
174
175 /* Allocate space for private device-specific data */
176 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
177 if (!local) {
178 printk(KERN_ERR "atmel_cs: no memory for new device\n");
179 return -ENOMEM;
180 }
181 p_dev->priv = local;
182
183 return atmel_config(p_dev);
184 } /* atmel_attach */
185
186 /*======================================================================
187
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.
192
193 ======================================================================*/
194
195 static void atmel_detach(struct pcmcia_device *link)
196 {
197 DEBUG(0, "atmel_detach(0x%p)\n", link);
198
199 atmel_release(link);
200
201 kfree(link->priv);
202 }
203
204 /*======================================================================
205
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.
209
210 ======================================================================*/
211
212 #define CS_CHECK(fn, ret) \
213 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
214
215 /* Call-back function to interrogate PCMCIA-specific information
216 about the current existance of the card */
217 static int card_present(void *arg)
218 {
219 struct pcmcia_device *link = (struct pcmcia_device *)arg;
220
221 if (pcmcia_dev_present(link))
222 return 1;
223
224 return 0;
225 }
226
227 static int atmel_config_check(struct pcmcia_device *p_dev,
228 cistpl_cftable_entry_t *cfg,
229 cistpl_cftable_entry_t *dflt,
230 unsigned int vcc,
231 void *priv_data)
232 {
233 if (cfg->index == 0)
234 return -ENODEV;
235
236 /* Does this card need audio output? */
237 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
238 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
239 p_dev->conf.Status = CCSR_AUDIO_ENA;
240 }
241
242 /* Use power settings for Vcc and Vpp if present */
243 /* Note that the CIS values need to be rescaled */
244 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
245 p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
246 else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
247 p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
248
249 /* Do we need to allocate an interrupt? */
250 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
251 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
252
253 /* IO window settings */
254 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
255 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
256 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
257 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
258 if (!(io->flags & CISTPL_IO_8BIT))
259 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
260 if (!(io->flags & CISTPL_IO_16BIT))
261 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
262 p_dev->io.BasePort1 = io->win[0].base;
263 p_dev->io.NumPorts1 = io->win[0].len;
264 if (io->nwin > 1) {
265 p_dev->io.Attributes2 = p_dev->io.Attributes1;
266 p_dev->io.BasePort2 = io->win[1].base;
267 p_dev->io.NumPorts2 = io->win[1].len;
268 }
269 }
270
271 /* This reserves IO space but doesn't actually enable it */
272 return pcmcia_request_io(p_dev, &p_dev->io);
273 }
274
275 static int atmel_config(struct pcmcia_device *link)
276 {
277 local_info_t *dev;
278 int last_fn, last_ret;
279 struct pcmcia_device_id *did;
280
281 dev = link->priv;
282 did = dev_get_drvdata(&handle_to_dev(link));
283
284 DEBUG(0, "atmel_config(0x%p)\n", link);
285
286 /*
287 In this loop, we scan the CIS for configuration table entries,
288 each of which describes a valid card configuration, including
289 voltage, IO window, memory window, and interrupt settings.
290
291 We make no assumptions about the card to be configured: we use
292 just the information available in the CIS. In an ideal world,
293 this would work for any PCMCIA card, but it requires a complete
294 and accurate CIS. In practice, a driver usually "knows" most of
295 these things without consulting the CIS, and most client drivers
296 will only use the CIS to fill in implementation-defined details.
297 */
298 if (pcmcia_loop_config(link, atmel_config_check, NULL))
299 goto failed;
300
301 /*
302 Allocate an interrupt line. Note that this does not assign a
303 handler to the interrupt, unless the 'Handler' member of the
304 irq structure is initialized.
305 */
306 if (link->conf.Attributes & CONF_ENABLE_IRQ)
307 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
308
309 /*
310 This actually configures the PCMCIA socket -- setting up
311 the I/O windows and the interrupt mapping, and putting the
312 card and host interface into "Memory and IO" mode.
313 */
314 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
315
316 if (link->irq.AssignedIRQ == 0) {
317 printk(KERN_ALERT
318 "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
319 goto cs_failed;
320 }
321
322 ((local_info_t*)link->priv)->eth_dev =
323 init_atmel_card(link->irq.AssignedIRQ,
324 link->io.BasePort1,
325 did ? did->driver_info : ATMEL_FW_TYPE_NONE,
326 &handle_to_dev(link),
327 card_present,
328 link);
329 if (!((local_info_t*)link->priv)->eth_dev)
330 goto cs_failed;
331
332
333 /*
334 At this point, the dev_node_t structure(s) need to be
335 initialized and arranged in a linked list at link->dev_node.
336 */
337 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
338 dev->node.major = dev->node.minor = 0;
339 link->dev_node = &dev->node;
340
341 return 0;
342
343 cs_failed:
344 cs_error(link, last_fn, last_ret);
345 failed:
346 atmel_release(link);
347 return -ENODEV;
348 }
349
350 /*======================================================================
351
352 After a card is removed, atmel_release() will unregister the
353 device, and release the PCMCIA configuration. If the device is
354 still open, this will be postponed until it is closed.
355
356 ======================================================================*/
357
358 static void atmel_release(struct pcmcia_device *link)
359 {
360 struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
361
362 DEBUG(0, "atmel_release(0x%p)\n", link);
363
364 if (dev)
365 stop_atmel_card(dev);
366 ((local_info_t*)link->priv)->eth_dev = NULL;
367
368 pcmcia_disable_device(link);
369 }
370
371 static int atmel_suspend(struct pcmcia_device *link)
372 {
373 local_info_t *local = link->priv;
374
375 netif_device_detach(local->eth_dev);
376
377 return 0;
378 }
379
380 static int atmel_resume(struct pcmcia_device *link)
381 {
382 local_info_t *local = link->priv;
383
384 atmel_open(local->eth_dev);
385 netif_device_attach(local->eth_dev);
386
387 return 0;
388 }
389
390 /*====================================================================*/
391 /* We use the driver_info field to store the correct firmware type for a card. */
392
393 #define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
394 .match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
395 PCMCIA_DEV_ID_MATCH_CARD_ID, \
396 .manf_id = (manf), \
397 .card_id = (card), \
398 .driver_info = (kernel_ulong_t)(info), }
399
400 #define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
401 .match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
402 PCMCIA_DEV_ID_MATCH_PROD_ID2, \
403 .prod_id = { (v1), (v2), NULL, NULL }, \
404 .prod_id_hash = { (vh1), (vh2), 0, 0 }, \
405 .driver_info = (kernel_ulong_t)(info), }
406
407 static struct pcmcia_device_id atmel_ids[] = {
408 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
409 PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
410 PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
411 PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
412 PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
413 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
414 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
415 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
416 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
417 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
418 PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
419 PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
420 PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
421 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
422 PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
423 PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
424 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
425 PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
426 PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
427 PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
428 PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
429 PCMCIA_DEVICE_NULL
430 };
431
432 MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
433
434 static struct pcmcia_driver atmel_driver = {
435 .owner = THIS_MODULE,
436 .drv = {
437 .name = "atmel_cs",
438 },
439 .probe = atmel_probe,
440 .remove = atmel_detach,
441 .id_table = atmel_ids,
442 .suspend = atmel_suspend,
443 .resume = atmel_resume,
444 };
445
446 static int atmel_cs_init(void)
447 {
448 return pcmcia_register_driver(&atmel_driver);
449 }
450
451 static void atmel_cs_cleanup(void)
452 {
453 pcmcia_unregister_driver(&atmel_driver);
454 }
455
456 /*
457 This program is free software; you can redistribute it and/or
458 modify it under the terms of the GNU General Public License
459 as published by the Free Software Foundation; either version 2
460 of the License, or (at your option) any later version.
461
462 This program is distributed in the hope that it will be useful,
463 but WITHOUT ANY WARRANTY; without even the implied warranty of
464 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
465 GNU General Public License for more details.
466
467 In addition:
468
469 Redistribution and use in source and binary forms, with or without
470 modification, are permitted provided that the following conditions
471 are met:
472
473 1. Redistributions of source code must retain the above copyright
474 notice, this list of conditions and the following disclaimer.
475 2. Redistributions in binary form must reproduce the above copyright
476 notice, this list of conditions and the following disclaimer in the
477 documentation and/or other materials provided with the distribution.
478 3. The name of the author may not be used to endorse or promote
479 products derived from this software without specific prior written
480 permission.
481
482 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
483 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
484 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
485 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
486 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
487 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
488 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
489 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
490 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
491 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
492 POSSIBILITY OF SUCH DAMAGE.
493 */
494
495 module_init(atmel_cs_init);
496 module_exit(atmel_cs_cleanup);
497
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