diff options
Diffstat (limited to 'drivers/net/wireless/orinoco_cs.c')
| -rw-r--r-- | drivers/net/wireless/orinoco_cs.c | 636 |
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 00000000000..74a8227256a --- /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); |