497 lines
18 KiB
C
497 lines
18 KiB
C
/*** -*- linux-c -*- **********************************************************
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Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
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Copyright 2000-2001 ATMEL Corporation.
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Copyright 2003 Simon Kelley.
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This code was developed from version 2.1.1 of the Atmel drivers,
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released by Atmel corp. under the GPL in December 2002. It also
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includes code from the Linux aironet drivers (C) Benjamin Reed,
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and the Linux PCMCIA package, (C) David Hinds.
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For all queries about this code, please contact the current author,
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Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This software is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Atmel wireless lan drivers; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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******************************************************************************/
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#ifdef __IN_PCMCIA_PACKAGE__
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#include <pcmcia/k_compat.h>
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#endif
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/netdevice.h>
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#include <linux/moduleparam.h>
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#include <linux/device.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/ds.h>
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#include <pcmcia/ciscode.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <linux/wireless.h>
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#include "atmel.h"
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/*
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All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
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you do not define PCMCIA_DEBUG at all, all the debug code will be
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left out. If you compile with PCMCIA_DEBUG=0, the debug code will
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be present but disabled -- but it can then be enabled for specific
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modules at load time with a 'pc_debug=#' option to insmod.
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*/
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#ifdef PCMCIA_DEBUG
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static int pc_debug = PCMCIA_DEBUG;
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module_param(pc_debug, int, 0);
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static char *version = "$Revision: 1.2 $";
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#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
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#else
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#define DEBUG(n, args...)
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#endif
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/*====================================================================*/
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MODULE_AUTHOR("Simon Kelley");
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MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
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/*====================================================================*/
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/*
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The event() function is this driver's Card Services event handler.
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It will be called by Card Services when an appropriate card status
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event is received. The config() and release() entry points are
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used to configure or release a socket, in response to card
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insertion and ejection events. They are invoked from the atmel_cs
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event handler.
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*/
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static int atmel_config(struct pcmcia_device *link);
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static void atmel_release(struct pcmcia_device *link);
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/*
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The attach() and detach() entry points are used to create and destroy
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"instances" of the driver, where each instance represents everything
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needed to manage one actual PCMCIA card.
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*/
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static void atmel_detach(struct pcmcia_device *p_dev);
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/*
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You'll also need to prototype all the functions that will actually
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be used to talk to your device. See 'pcmem_cs' for a good example
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of a fully self-sufficient driver; the other drivers rely more or
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less on other parts of the kernel.
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*/
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/*
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A linked list of "instances" of the atmelnet device. Each actual
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PCMCIA card corresponds to one device instance, and is described
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by one struct pcmcia_device structure (defined in ds.h).
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You may not want to use a linked list for this -- for example, the
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memory card driver uses an array of struct pcmcia_device pointers, where minor
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device numbers are used to derive the corresponding array index.
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*/
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/*
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A driver needs to provide a dev_node_t structure for each device
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on a card. In some cases, there is only one device per card (for
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example, ethernet cards, modems). In other cases, there may be
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many actual or logical devices (SCSI adapters, memory cards with
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multiple partitions). The dev_node_t structures need to be kept
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in a linked list starting at the 'dev' field of a struct pcmcia_device
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structure. We allocate them in the card's private data structure,
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because they generally shouldn't be allocated dynamically.
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In this case, we also provide a flag to indicate if a device is
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"stopped" due to a power management event, or card ejection. The
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device IO routines can use a flag like this to throttle IO to a
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card that is not ready to accept it.
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*/
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typedef struct local_info_t {
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dev_node_t node;
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struct net_device *eth_dev;
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} local_info_t;
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/*======================================================================
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atmel_attach() creates an "instance" of the driver, allocating
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local data structures for one device. The device is registered
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with Card Services.
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The dev_link structure is initialized, but we don't actually
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configure the card at this point -- we wait until we receive a
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card insertion event.
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======================================================================*/
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static int atmel_probe(struct pcmcia_device *p_dev)
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{
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local_info_t *local;
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DEBUG(0, "atmel_attach()\n");
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/* Interrupt setup */
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p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
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p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
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p_dev->irq.Handler = NULL;
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/*
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General socket configuration defaults can go here. In this
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client, we assume very little, and rely on the CIS for almost
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everything. In most clients, many details (i.e., number, sizes,
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and attributes of IO windows) are fixed by the nature of the
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device, and can be hard-wired here.
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*/
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p_dev->conf.Attributes = 0;
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p_dev->conf.IntType = INT_MEMORY_AND_IO;
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/* Allocate space for private device-specific data */
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local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
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if (!local) {
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printk(KERN_ERR "atmel_cs: no memory for new device\n");
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return -ENOMEM;
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}
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p_dev->priv = local;
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return atmel_config(p_dev);
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} /* atmel_attach */
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/*======================================================================
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This deletes a driver "instance". The device is de-registered
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with Card Services. If it has been released, all local data
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structures are freed. Otherwise, the structures will be freed
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when the device is released.
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======================================================================*/
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static void atmel_detach(struct pcmcia_device *link)
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{
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DEBUG(0, "atmel_detach(0x%p)\n", link);
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atmel_release(link);
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kfree(link->priv);
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}
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/*======================================================================
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atmel_config() is scheduled to run after a CARD_INSERTION event
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is received, to configure the PCMCIA socket, and to make the
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device available to the system.
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======================================================================*/
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#define CS_CHECK(fn, ret) \
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do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
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/* Call-back function to interrogate PCMCIA-specific information
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about the current existance of the card */
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static int card_present(void *arg)
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{
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struct pcmcia_device *link = (struct pcmcia_device *)arg;
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if (pcmcia_dev_present(link))
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return 1;
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return 0;
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}
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static int atmel_config_check(struct pcmcia_device *p_dev,
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cistpl_cftable_entry_t *cfg,
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cistpl_cftable_entry_t *dflt,
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unsigned int vcc,
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void *priv_data)
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{
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if (cfg->index == 0)
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return -ENODEV;
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/* Does this card need audio output? */
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if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
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p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
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p_dev->conf.Status = CCSR_AUDIO_ENA;
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}
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/* Use power settings for Vcc and Vpp if present */
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/* Note that the CIS values need to be rescaled */
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if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
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p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
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else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
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p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
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/* Do we need to allocate an interrupt? */
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if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
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p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
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/* IO window settings */
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p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
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if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
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cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
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p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
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if (!(io->flags & CISTPL_IO_8BIT))
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p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
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if (!(io->flags & CISTPL_IO_16BIT))
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p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
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p_dev->io.BasePort1 = io->win[0].base;
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p_dev->io.NumPorts1 = io->win[0].len;
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if (io->nwin > 1) {
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p_dev->io.Attributes2 = p_dev->io.Attributes1;
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p_dev->io.BasePort2 = io->win[1].base;
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p_dev->io.NumPorts2 = io->win[1].len;
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}
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}
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/* This reserves IO space but doesn't actually enable it */
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return pcmcia_request_io(p_dev, &p_dev->io);
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}
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static int atmel_config(struct pcmcia_device *link)
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{
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local_info_t *dev;
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int last_fn, last_ret;
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struct pcmcia_device_id *did;
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dev = link->priv;
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did = dev_get_drvdata(&handle_to_dev(link));
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DEBUG(0, "atmel_config(0x%p)\n", link);
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/*
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In this loop, we scan the CIS for configuration table entries,
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each of which describes a valid card configuration, including
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voltage, IO window, memory window, and interrupt settings.
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We make no assumptions about the card to be configured: we use
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just the information available in the CIS. In an ideal world,
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this would work for any PCMCIA card, but it requires a complete
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and accurate CIS. In practice, a driver usually "knows" most of
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these things without consulting the CIS, and most client drivers
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will only use the CIS to fill in implementation-defined details.
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*/
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if (pcmcia_loop_config(link, atmel_config_check, NULL))
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goto failed;
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/*
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Allocate an interrupt line. Note that this does not assign a
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handler to the interrupt, unless the 'Handler' member of the
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irq structure is initialized.
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*/
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if (link->conf.Attributes & CONF_ENABLE_IRQ)
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CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
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/*
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This actually configures the PCMCIA socket -- setting up
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the I/O windows and the interrupt mapping, and putting the
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card and host interface into "Memory and IO" mode.
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*/
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CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
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if (link->irq.AssignedIRQ == 0) {
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printk(KERN_ALERT
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"atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
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goto cs_failed;
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}
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((local_info_t*)link->priv)->eth_dev =
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init_atmel_card(link->irq.AssignedIRQ,
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link->io.BasePort1,
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did ? did->driver_info : ATMEL_FW_TYPE_NONE,
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&handle_to_dev(link),
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card_present,
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link);
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if (!((local_info_t*)link->priv)->eth_dev)
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goto cs_failed;
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/*
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At this point, the dev_node_t structure(s) need to be
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initialized and arranged in a linked list at link->dev_node.
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*/
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strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
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dev->node.major = dev->node.minor = 0;
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link->dev_node = &dev->node;
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return 0;
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cs_failed:
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cs_error(link, last_fn, last_ret);
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failed:
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atmel_release(link);
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return -ENODEV;
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}
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/*======================================================================
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After a card is removed, atmel_release() will unregister the
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device, and release the PCMCIA configuration. If the device is
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still open, this will be postponed until it is closed.
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======================================================================*/
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static void atmel_release(struct pcmcia_device *link)
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{
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struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
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DEBUG(0, "atmel_release(0x%p)\n", link);
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if (dev)
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stop_atmel_card(dev);
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((local_info_t*)link->priv)->eth_dev = NULL;
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pcmcia_disable_device(link);
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}
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static int atmel_suspend(struct pcmcia_device *link)
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{
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local_info_t *local = link->priv;
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netif_device_detach(local->eth_dev);
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return 0;
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}
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static int atmel_resume(struct pcmcia_device *link)
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{
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local_info_t *local = link->priv;
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atmel_open(local->eth_dev);
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netif_device_attach(local->eth_dev);
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return 0;
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}
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/*====================================================================*/
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/* We use the driver_info field to store the correct firmware type for a card. */
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#define PCMCIA_DEVICE_MANF_CARD_INFO(manf, card, info) { \
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.match_flags = PCMCIA_DEV_ID_MATCH_MANF_ID| \
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PCMCIA_DEV_ID_MATCH_CARD_ID, \
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.manf_id = (manf), \
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.card_id = (card), \
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.driver_info = (kernel_ulong_t)(info), }
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#define PCMCIA_DEVICE_PROD_ID12_INFO(v1, v2, vh1, vh2, info) { \
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.match_flags = PCMCIA_DEV_ID_MATCH_PROD_ID1| \
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PCMCIA_DEV_ID_MATCH_PROD_ID2, \
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.prod_id = { (v1), (v2), NULL, NULL }, \
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.prod_id_hash = { (vh1), (vh2), 0, 0 }, \
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.driver_info = (kernel_ulong_t)(info), }
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static struct pcmcia_device_id atmel_ids[] = {
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PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0620, ATMEL_FW_TYPE_502_3COM),
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PCMCIA_DEVICE_MANF_CARD_INFO(0x0101, 0x0696, ATMEL_FW_TYPE_502_3COM),
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PCMCIA_DEVICE_MANF_CARD_INFO(0x01bf, 0x3302, ATMEL_FW_TYPE_502E),
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PCMCIA_DEVICE_MANF_CARD_INFO(0xd601, 0x0007, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("11WAVE", "11WP611AL-E", 0x9eb2da1f, 0xc9a0d3f9, ATMEL_FW_TYPE_502E),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR", 0xabda4164, 0x41b37e1f, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_D", 0xabda4164, 0x3675d704, ATMEL_FW_TYPE_502D),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C502AR_E", 0xabda4164, 0x4172e792, ATMEL_FW_TYPE_502E),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504_R", 0xabda4164, 0x917f3d72, ATMEL_FW_TYPE_504_2958),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504", 0xabda4164, 0x5040670a, ATMEL_FW_TYPE_504),
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PCMCIA_DEVICE_PROD_ID12_INFO("ATMEL", "AT76C504A", 0xabda4164, 0xe15ed87f, ATMEL_FW_TYPE_504A_2958),
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PCMCIA_DEVICE_PROD_ID12_INFO("BT", "Voyager 1020 Laptop Adapter", 0xae49b86a, 0x1e957cd5, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("CNet", "CNWLC 11Mbps Wireless PC Card V-5", 0xbc477dde, 0x502fae6b, ATMEL_FW_TYPE_502E),
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PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN PC Card", 0x5b878724, 0x122f1df6, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("IEEE 802.11b", "Wireless LAN Card S", 0x5b878724, 0x5fba533a, ATMEL_FW_TYPE_504_2958),
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PCMCIA_DEVICE_PROD_ID12_INFO("OEM", "11Mbps Wireless LAN PC Card V-3", 0xfea54c90, 0x1c5b0f68, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W", 0xc4f8b18b, 0x30f38774, ATMEL_FW_TYPE_502D),
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PCMCIA_DEVICE_PROD_ID12_INFO("SMC", "2632W-V2", 0xc4f8b18b, 0x172d1377, ATMEL_FW_TYPE_502),
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PCMCIA_DEVICE_PROD_ID12_INFO("Wireless", "PC_CARD", 0xa407ecdd, 0x119f6314, ATMEL_FW_TYPE_502D),
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PCMCIA_DEVICE_PROD_ID12_INFO("WLAN", "802.11b PC CARD", 0x575c516c, 0xb1f6dbc4, ATMEL_FW_TYPE_502D),
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PCMCIA_DEVICE_PROD_ID12_INFO("LG", "LW2100N", 0xb474d43a, 0x6b1fec94, ATMEL_FW_TYPE_502E),
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PCMCIA_DEVICE_NULL
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};
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MODULE_DEVICE_TABLE(pcmcia, atmel_ids);
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static struct pcmcia_driver atmel_driver = {
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.owner = THIS_MODULE,
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.drv = {
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.name = "atmel_cs",
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},
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.probe = atmel_probe,
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.remove = atmel_detach,
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.id_table = atmel_ids,
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.suspend = atmel_suspend,
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.resume = atmel_resume,
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};
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static int atmel_cs_init(void)
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{
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return pcmcia_register_driver(&atmel_driver);
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}
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static void atmel_cs_cleanup(void)
|
|
{
|
|
pcmcia_unregister_driver(&atmel_driver);
|
|
}
|
|
|
|
/*
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
In addition:
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
3. The name of the author may not be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
module_init(atmel_cs_init);
|
|
module_exit(atmel_cs_cleanup);
|