Root/drivers/net/wireless/atmel_cs.c

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
67static int pc_debug = PCMCIA_DEBUG;
68module_param(pc_debug, int, 0);
69static 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
77MODULE_AUTHOR("Simon Kelley");
78MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
79MODULE_LICENSE("GPL");
80MODULE_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
93static int atmel_config(struct pcmcia_device *link);
94static 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
102static 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
137typedef 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
154static 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
195static 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) \
213do { 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 */
217static 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
227static 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
275static 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
358static 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
371static 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
380static 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
407static 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
432MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
433
434static 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
446static int atmel_cs_init(void)
447{
448        return pcmcia_register_driver(&atmel_driver);
449}
450
451static 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
495module_init(atmel_cs_init);
496module_exit(atmel_cs_cleanup);
497

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