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linux/drivers/net/wireless/orinoco_cs.c

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/* orinoco_cs.c (formerly known as dldwd_cs.c)
*
* A driver for "Hermes" chipset based PCMCIA wireless adaptors, such
* as the Lucent WavelanIEEE/Orinoco cards and their OEM (Cabletron/
* EnteraSys RoamAbout 802.11, ELSA Airlancer, Melco Buffalo and others).
* It should also be usable on various Prism II based cards such as the
* Linksys, D-Link and Farallon Skyline. It should also work on Symbol
* cards such as the 3Com AirConnect and Ericsson WLAN.
*
* Copyright notice & release notes in file orinoco.c
*/
#define DRIVER_NAME "orinoco_cs"
#define PFX DRIVER_NAME ": "
#include <linux/config.h>
#ifdef __IN_PCMCIA_PACKAGE__
#include <pcmcia/k_compat.h>
#endif /* __IN_PCMCIA_PACKAGE__ */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include "orinoco.h"
/********************************************************************/
/* Module stuff */
/********************************************************************/
MODULE_AUTHOR("David Gibson <hermes@gibson.dropbear.id.au>");
MODULE_DESCRIPTION("Driver for PCMCIA Lucent Orinoco, Prism II based and similar wireless cards");
MODULE_LICENSE("Dual MPL/GPL");
/* Module parameters */
/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
* don't have any CIS entry for it. This workaround it... */
static int ignore_cis_vcc; /* = 0 */
module_param(ignore_cis_vcc, int, 0);
MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
/********************************************************************/
/* Magic constants */
/********************************************************************/
/*
* The dev_info variable is the "key" that is used to match up this
* device driver with appropriate cards, through the card
* configuration database.
*/
static dev_info_t dev_info = DRIVER_NAME;
/********************************************************************/
/* Data structures */
/********************************************************************/
/* PCMCIA specific device information (goes in the card field of
* struct orinoco_private */
struct orinoco_pccard {
dev_link_t link;
dev_node_t node;
/* Used to handle hard reset */
/* yuck, we need this hack to work around the insanity of the
* PCMCIA layer */
unsigned long hard_reset_in_progress;
};
/*
* A linked list of "instances" of the device. Each actual PCMCIA
* card corresponds to one device instance, and is described by one
* dev_link_t structure (defined in ds.h).
*/
static dev_link_t *dev_list; /* = NULL */
/********************************************************************/
/* Function prototypes */
/********************************************************************/
/* device methods */
static int orinoco_cs_hard_reset(struct orinoco_private *priv);
/* PCMCIA gumpf */
static void orinoco_cs_config(dev_link_t * link);
static void orinoco_cs_release(dev_link_t * link);
static int orinoco_cs_event(event_t event, int priority,
event_callback_args_t * args);
static dev_link_t *orinoco_cs_attach(void);
static void orinoco_cs_detach(dev_link_t *);
/********************************************************************/
/* Device methods */
/********************************************************************/
static int
orinoco_cs_hard_reset(struct orinoco_private *priv)
{
struct orinoco_pccard *card = priv->card;
dev_link_t *link = &card->link;
int err;
/* We need atomic ops here, because we're not holding the lock */
set_bit(0, &card->hard_reset_in_progress);
err = pcmcia_reset_card(link->handle, NULL);
if (err)
return err;
msleep(100);
clear_bit(0, &card->hard_reset_in_progress);
return 0;
}
/********************************************************************/
/* PCMCIA stuff */
/********************************************************************/
/*
* This creates an "instance" of the driver, allocating local data
* structures for one device. The device is registered with Card
* Services.
*
* The dev_link structure is initialized, but we don't actually
* configure the card at this point -- we wait until we receive a card
* insertion event. */
static dev_link_t *
orinoco_cs_attach(void)
{
struct net_device *dev;
struct orinoco_private *priv;
struct orinoco_pccard *card;
dev_link_t *link;
client_reg_t client_reg;
int ret;
dev = alloc_orinocodev(sizeof(*card), orinoco_cs_hard_reset);
if (! dev)
return NULL;
priv = netdev_priv(dev);
card = priv->card;
/* Link both structures together */
link = &card->link;
link->priv = dev;
/* Interrupt setup */
link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
link->irq.IRQInfo1 = IRQ_LEVEL_ID;
link->irq.Handler = orinoco_interrupt;
link->irq.Instance = dev;
/* General socket configuration defaults can go here. In this
* client, we assume very little, and rely on the CIS for
* almost everything. In most clients, many details (i.e.,
* number, sizes, and attributes of IO windows) are fixed by
* the nature of the device, and can be hard-wired here. */
link->conf.Attributes = 0;
link->conf.IntType = INT_MEMORY_AND_IO;
/* Register with Card Services */
/* FIXME: need a lock? */
link->next = dev_list;
dev_list = link;
client_reg.dev_info = &dev_info;
client_reg.EventMask =
CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
client_reg.event_handler = &orinoco_cs_event;
client_reg.Version = 0x0210; /* FIXME: what does this mean? */
client_reg.event_callback_args.client_data = link;
ret = pcmcia_register_client(&link->handle, &client_reg);
if (ret != CS_SUCCESS) {
cs_error(link->handle, RegisterClient, ret);
orinoco_cs_detach(link);
return NULL;
}
return link;
} /* orinoco_cs_attach */
/*
* This deletes a driver "instance". The device is de-registered with
* Card Services. If it has been released, all local data structures
* are freed. Otherwise, the structures will be freed when the device
* is released.
*/
static void orinoco_cs_detach(dev_link_t *link)
{
dev_link_t **linkp;
struct net_device *dev = link->priv;
/* Locate device structure */
for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
if (*linkp == link)
break;
BUG_ON(*linkp == NULL);
if (link->state & DEV_CONFIG)
orinoco_cs_release(link);
/* Break the link with Card Services */
if (link->handle)
pcmcia_deregister_client(link->handle);
/* Unlink device structure, and free it */
*linkp = link->next;
DEBUG(0, PFX "detach: link=%p link->dev=%p\n", link, link->dev);
if (link->dev) {
DEBUG(0, PFX "About to unregister net device %p\n",
dev);
unregister_netdev(dev);
}
free_orinocodev(dev);
} /* orinoco_cs_detach */
/*
* orinoco_cs_config() is scheduled to run after a CARD_INSERTION
* event is received, to configure the PCMCIA socket, and to make the
* device available to the system.
*/
#define CS_CHECK(fn, ret) do { \
last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; \
} while (0)
static void
orinoco_cs_config(dev_link_t *link)
{
struct net_device *dev = link->priv;
client_handle_t handle = link->handle;
struct orinoco_private *priv = netdev_priv(dev);
struct orinoco_pccard *card = priv->card;
hermes_t *hw = &priv->hw;
int last_fn, last_ret;
u_char buf[64];
config_info_t conf;
cisinfo_t info;
tuple_t tuple;
cisparse_t parse;
void __iomem *mem;
CS_CHECK(ValidateCIS, pcmcia_validate_cis(handle, &info));
/*
* This reads the card's CONFIG tuple to find its
* configuration registers.
*/
tuple.DesiredTuple = CISTPL_CONFIG;
tuple.Attributes = 0;
tuple.TupleData = buf;
tuple.TupleDataMax = sizeof(buf);
tuple.TupleOffset = 0;
CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
link->conf.ConfigBase = parse.config.base;
link->conf.Present = parse.config.rmask[0];
/* Configure card */
link->state |= DEV_CONFIG;
/* Look up the current Vcc */
CS_CHECK(GetConfigurationInfo,
pcmcia_get_configuration_info(handle, &conf));
link->conf.Vcc = conf.Vcc;
/*
* In this loop, we scan the CIS for configuration table
* entries, each of which describes a valid card
* configuration, including voltage, IO window, memory window,
* and interrupt settings.
*
* We make no assumptions about the card to be configured: we
* use just the information available in the CIS. In an ideal
* world, this would work for any PCMCIA card, but it requires
* a complete and accurate CIS. In practice, a driver usually
* "knows" most of these things without consulting the CIS,
* and most client drivers will only use the CIS to fill in
* implementation-defined details.
*/
tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
while (1) {
cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
cistpl_cftable_entry_t dflt = { .index = 0 };
if ( (pcmcia_get_tuple_data(handle, &tuple) != 0)
|| (pcmcia_parse_tuple(handle, &tuple, &parse) != 0))
goto next_entry;
if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
dflt = *cfg;
if (cfg->index == 0)
goto next_entry;
link->conf.ConfigIndex = cfg->index;
/* Does this card need audio output? */
if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
link->conf.Attributes |= CONF_ENABLE_SPKR;
link->conf.Status = CCSR_AUDIO_ENA;
}
/* Use power settings for Vcc and Vpp if present */
/* Note that the CIS values need to be rescaled */
if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
if (conf.Vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) {
DEBUG(2, "orinoco_cs_config: Vcc mismatch (conf.Vcc = %d, CIS = %d)\n", conf.Vcc, cfg->vcc.param[CISTPL_POWER_VNOM] / 10000);
if (!ignore_cis_vcc)
goto next_entry;
}
} else if (dflt.vcc.present & (1 << CISTPL_POWER_VNOM)) {
if (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM] / 10000) {
DEBUG(2, "orinoco_cs_config: Vcc mismatch (conf.Vcc = %d, CIS = %d)\n", conf.Vcc, dflt.vcc.param[CISTPL_POWER_VNOM] / 10000);
if(!ignore_cis_vcc)
goto next_entry;
}
}
if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
link->conf.Vpp1 = link->conf.Vpp2 =
cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
else if (dflt.vpp1.present & (1 << CISTPL_POWER_VNOM))
link->conf.Vpp1 = link->conf.Vpp2 =
dflt.vpp1.param[CISTPL_POWER_VNOM] / 10000;
/* Do we need to allocate an interrupt? */
link->conf.Attributes |= CONF_ENABLE_IRQ;
/* IO window settings */
link->io.NumPorts1 = link->io.NumPorts2 = 0;
if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
cistpl_io_t *io =
(cfg->io.nwin) ? &cfg->io : &dflt.io;
link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
if (!(io->flags & CISTPL_IO_8BIT))
link->io.Attributes1 =
IO_DATA_PATH_WIDTH_16;
if (!(io->flags & CISTPL_IO_16BIT))
link->io.Attributes1 =
IO_DATA_PATH_WIDTH_8;
link->io.IOAddrLines =
io->flags & CISTPL_IO_LINES_MASK;
link->io.BasePort1 = io->win[0].base;
link->io.NumPorts1 = io->win[0].len;
if (io->nwin > 1) {
link->io.Attributes2 =
link->io.Attributes1;
link->io.BasePort2 = io->win[1].base;
link->io.NumPorts2 = io->win[1].len;
}
/* This reserves IO space but doesn't actually enable it */
if (pcmcia_request_io(link->handle, &link->io) != 0)
goto next_entry;
}
/* If we got this far, we're cool! */
break;
next_entry:
if (link->io.NumPorts1)
pcmcia_release_io(link->handle, &link->io);
last_ret = pcmcia_get_next_tuple(handle, &tuple);
if (last_ret == CS_NO_MORE_ITEMS) {
printk(KERN_ERR PFX "GetNextTuple(): No matching "
"CIS configuration. Maybe you need the "
"ignore_cis_vcc=1 parameter.\n");
goto cs_failed;
}
}
/*
* Allocate an interrupt line. Note that this does not assign
* a handler to the interrupt, unless the 'Handler' member of
* the irq structure is initialized.
*/
CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
/* We initialize the hermes structure before completing PCMCIA
* configuration just in case the interrupt handler gets
* called. */
mem = ioport_map(link->io.BasePort1, link->io.NumPorts1);
if (!mem)
goto cs_failed;
hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
/*
* This actually configures the PCMCIA socket -- setting up
* the I/O windows and the interrupt mapping, and putting the
* card and host interface into "Memory and IO" mode.
*/
CS_CHECK(RequestConfiguration,
pcmcia_request_configuration(link->handle, &link->conf));
/* Ok, we have the configuration, prepare to register the netdev */
dev->base_addr = link->io.BasePort1;
dev->irq = link->irq.AssignedIRQ;
SET_MODULE_OWNER(dev);
card->node.major = card->node.minor = 0;
SET_NETDEV_DEV(dev, &handle_to_dev(handle));
/* Tell the stack we exist */
if (register_netdev(dev) != 0) {
printk(KERN_ERR PFX "register_netdev() failed\n");
goto failed;
}
/* At this point, the dev_node_t structure(s) needs to be
* initialized and arranged in a linked list at link->dev. */
strcpy(card->node.dev_name, dev->name);
link->dev = &card->node; /* link->dev being non-NULL is also
used to indicate that the
net_device has been registered */
link->state &= ~DEV_CONFIG_PENDING;
/* Finally, report what we've done */
printk(KERN_DEBUG "%s: index 0x%02x: Vcc %d.%d",
dev->name, link->conf.ConfigIndex,
link->conf.Vcc / 10, link->conf.Vcc % 10);
if (link->conf.Vpp1)
printk(", Vpp %d.%d", link->conf.Vpp1 / 10,
link->conf.Vpp1 % 10);
printk(", irq %d", link->irq.AssignedIRQ);
if (link->io.NumPorts1)
printk(", io 0x%04x-0x%04x", link->io.BasePort1,
link->io.BasePort1 + link->io.NumPorts1 - 1);
if (link->io.NumPorts2)
printk(" & 0x%04x-0x%04x", link->io.BasePort2,
link->io.BasePort2 + link->io.NumPorts2 - 1);
printk("\n");
return;
cs_failed:
cs_error(link->handle, last_fn, last_ret);
failed:
orinoco_cs_release(link);
} /* orinoco_cs_config */
/*
* After a card is removed, orinoco_cs_release() will unregister the
* device, and release the PCMCIA configuration. If the device is
* still open, this will be postponed until it is closed.
*/
static void
orinoco_cs_release(dev_link_t *link)
{
struct net_device *dev = link->priv;
struct orinoco_private *priv = netdev_priv(dev);
unsigned long flags;
/* We're committed to taking the device away now, so mark the
* hardware as unavailable */
spin_lock_irqsave(&priv->lock, flags);
priv->hw_unavailable++;
spin_unlock_irqrestore(&priv->lock, flags);
/* Don't bother checking to see if these succeed or not */
pcmcia_release_configuration(link->handle);
if (link->io.NumPorts1)
pcmcia_release_io(link->handle, &link->io);
if (link->irq.AssignedIRQ)
pcmcia_release_irq(link->handle, &link->irq);
link->state &= ~DEV_CONFIG;
if (priv->hw.iobase)
ioport_unmap(priv->hw.iobase);
} /* orinoco_cs_release */
/*
* The card status event handler. Mostly, this schedules other stuff
* to run after an event is received.
*/
static int
orinoco_cs_event(event_t event, int priority,
event_callback_args_t * args)
{
dev_link_t *link = args->client_data;
struct net_device *dev = link->priv;
struct orinoco_private *priv = netdev_priv(dev);
struct orinoco_pccard *card = priv->card;
int err = 0;
unsigned long flags;
switch (event) {
case CS_EVENT_CARD_REMOVAL:
link->state &= ~DEV_PRESENT;
if (link->state & DEV_CONFIG) {
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
netif_device_detach(dev);
priv->hw_unavailable++;
spin_unlock_irqrestore(&priv->lock, flags);
}
break;
case CS_EVENT_CARD_INSERTION:
link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
orinoco_cs_config(link);
break;
case CS_EVENT_PM_SUSPEND:
link->state |= DEV_SUSPEND;
/* Fall through... */
case CS_EVENT_RESET_PHYSICAL:
/* Mark the device as stopped, to block IO until later */
if (link->state & DEV_CONFIG) {
/* This is probably racy, but I can't think of
a better way, short of rewriting the PCMCIA
layer to not suck :-( */
if (! test_bit(0, &card->hard_reset_in_progress)) {
spin_lock_irqsave(&priv->lock, flags);
err = __orinoco_down(dev);
if (err)
printk(KERN_WARNING "%s: %s: Error %d downing interface\n",
dev->name,
event == CS_EVENT_PM_SUSPEND ? "SUSPEND" : "RESET_PHYSICAL",
err);
netif_device_detach(dev);
priv->hw_unavailable++;
spin_unlock_irqrestore(&priv->lock, flags);
}
pcmcia_release_configuration(link->handle);
}
break;
case CS_EVENT_PM_RESUME:
link->state &= ~DEV_SUSPEND;
/* Fall through... */
case CS_EVENT_CARD_RESET:
if (link->state & DEV_CONFIG) {
/* FIXME: should we double check that this is
* the same card as we had before */
pcmcia_request_configuration(link->handle, &link->conf);
if (! test_bit(0, &card->hard_reset_in_progress)) {
err = orinoco_reinit_firmware(dev);
if (err) {
printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
dev->name, err);
break;
}
spin_lock_irqsave(&priv->lock, flags);
netif_device_attach(dev);
priv->hw_unavailable--;
if (priv->open && ! priv->hw_unavailable) {
err = __orinoco_up(dev);
if (err)
printk(KERN_ERR "%s: Error %d restarting card\n",
dev->name, err);
}
spin_unlock_irqrestore(&priv->lock, flags);
}
}
break;
}
return err;
} /* orinoco_cs_event */
/********************************************************************/
/* Module initialization */
/********************************************************************/
/* Can't be declared "const" or the whole __initdata section will
* become const */
static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
" (David Gibson <hermes@gibson.dropbear.id.au>, "
"Pavel Roskin <proski@gnu.org>, et al)";
static struct pcmcia_driver orinoco_driver = {
.owner = THIS_MODULE,
.drv = {
.name = DRIVER_NAME,
},
.attach = orinoco_cs_attach,
.detach = orinoco_cs_detach,
};
static int __init
init_orinoco_cs(void)
{
printk(KERN_DEBUG "%s\n", version);
return pcmcia_register_driver(&orinoco_driver);
}
static void __exit
exit_orinoco_cs(void)
{
pcmcia_unregister_driver(&orinoco_driver);
BUG_ON(dev_list != NULL);
}
module_init(init_orinoco_cs);
module_exit(exit_orinoco_cs);
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