Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 636 insertions, 0 deletions

diff --git a/drivers/net/wireless/orinoco_cs.c b/drivers/net/wireless/orinoco_cs.c
new file mode 100644
index 0000000..74a8227
--- /dev/null
+++ b/drivers/net/wireless/orinoco_cs.c
@@ -0,0 +1,636 @@
+/* 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);