hostap_cs.c

IEEE 802.11a/b/g linux2.4/2.6 驱动程序源代码

	if (link == NULL)
		return NULL;

	memset(link, 0, sizeof(dev_link_t));

	PDEBUG(DEBUG_HW, "%s: setting Vcc=33 (constant)\n", dev_info);
	link->conf.Vcc = 33;
	link->conf.IntType = INT_MEMORY_AND_IO;

	/* register with CardServices */
	link->next = dev_list;
	dev_list = link;
	client_reg.dev_info = &dev_info;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13))
	client_reg.Attributes = INFO_IO_CLIENT;
	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 = &prism2_event;
#endif
	client_reg.Version = 0x0210;
	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);
		prism2_detach(link);
		return NULL;
	}
	return link;
}


static void prism2_detach(dev_link_t *link)
{
	dev_link_t **linkp;

	PDEBUG(DEBUG_FLOW, "prism2_detach\n");

	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
		if (*linkp == link)
			break;
	if (*linkp == NULL) {
		printk(KERN_WARNING "%s: Attempt to detach non-existing "
		       "PCMCIA client\n", dev_info);
		return;
	}

	if (link->state & DEV_CONFIG) {
		prism2_release((u_long)link);
	}

	if (link->handle) {
		int res = pcmcia_deregister_client(link->handle);
		if (res) {
			printk("CardService(DeregisterClient) => %d\n", res);
			cs_error(link->handle, DeregisterClient, res);
		}
	}

	*linkp = link->next;
	/* release net devices */
	if (link->priv) {
		prism2_free_local_data((struct net_device *) link->priv);

	}
	kfree(link);
}


#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

#define CFG_CHECK2(fn, retf) \
do { int ret = (retf); \
if (ret != 0) { \
	PDEBUG(DEBUG_EXTRA, "CardServices(" #fn ") returned %d\n", ret); \
	cs_error(link->handle, fn, ret); \
	goto next_entry; \
} \
} while (0)


/* run after a CARD_INSERTION event is received to configure the PCMCIA
 * socket and make the device available to the system */
static int prism2_config(dev_link_t *link)
{
	struct net_device *dev;
	struct hostap_interface *iface;
	local_info_t *local;
	int ret;
	tuple_t tuple;
	cisparse_t parse;
	int last_fn, last_ret;
	u_char buf[64];
	config_info_t conf;
	cistpl_cftable_entry_t dflt = { 0 };

	PDEBUG(DEBUG_FLOW, "prism2_config()\n");

	tuple.DesiredTuple = CISTPL_CONFIG;
	tuple.Attributes = 0;
	tuple.TupleData = buf;
	tuple.TupleDataMax = sizeof(buf);
	tuple.TupleOffset = 0;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link->handle, &tuple));
	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link->handle, &tuple));
	CS_CHECK(ParseTuple, pcmcia_parse_tuple(link->handle, &tuple, &parse));
	link->conf.ConfigBase = parse.config.base;
	link->conf.Present = parse.config.rmask[0];

	CS_CHECK(GetConfigurationInfo,
		 pcmcia_get_configuration_info(link->handle, &conf));
	PDEBUG(DEBUG_HW, "%s: %s Vcc=%d (from config)\n", dev_info,
	       ignore_cis_vcc ? "ignoring" : "setting", conf.Vcc);
	link->conf.Vcc = conf.Vcc;

	/* Look for an appropriate configuration table entry in the CIS */
	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link->handle, &tuple));
	for (;;) {
		cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
		CFG_CHECK2(GetTupleData,
			   pcmcia_get_tuple_data(link->handle, &tuple));
		CFG_CHECK2(ParseTuple,
			   pcmcia_parse_tuple(link->handle, &tuple, &parse));

		if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
			dflt = *cfg;
		if (cfg->index == 0)
			goto next_entry;
		link->conf.ConfigIndex = cfg->index;
		PDEBUG(DEBUG_EXTRA, "Checking CFTABLE_ENTRY 0x%02X "
		       "(default 0x%02X)\n", cfg->index, dflt.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 && !ignore_cis_vcc) {
				PDEBUG(DEBUG_EXTRA, "  Vcc mismatch - skipping"
				       " this entry\n");
				goto next_entry;
			}
		} else if (dflt.vcc.present & (1 << CISTPL_POWER_VNOM)) {
			if (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM] /
			    10000 && !ignore_cis_vcc) {
				PDEBUG(DEBUG_EXTRA, "  Vcc (default) mismatch "
				       "- skipping this entry\n");
				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? */
		if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
			link->conf.Attributes |= CONF_ENABLE_IRQ;
		else if (!(link->conf.Attributes & CONF_ENABLE_IRQ)) {
			/* At least Compaq WL200 does not have IRQInfo1 set,
			 * but it does not work without interrupts.. */
			printk("Config has no IRQ info, but trying to enable "
			       "IRQ anyway..\n");
			link->conf.Attributes |= CONF_ENABLE_IRQ;
		}

		/* IO window settings */
		PDEBUG(DEBUG_EXTRA, "IO window settings: cfg->io.nwin=%d "
		       "dflt.io.nwin=%d\n",
		       cfg->io.nwin, dflt.io.nwin);
		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;
			PDEBUG(DEBUG_EXTRA, "io->flags = 0x%04X, "
			       "io.base=0x%04x, len=%d\n", io->flags,
			       io->win[0].base, io->win[0].len);
			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 */
		CFG_CHECK2(RequestIO,
			   pcmcia_request_io(link->handle, &link->io));

		/* This configuration table entry is OK */
		break;

	next_entry:
		CS_CHECK(GetNextTuple,
			 pcmcia_get_next_tuple(link->handle, &tuple));
	}

	/* Need to allocate net_device before requesting IRQ handler */
	dev = prism2_init_local_data(&prism2_pccard_funcs, 0,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
				     NULL
#else
				     &handle_to_dev(link->handle)
#endif
		);
	if (dev == NULL)
		goto failed;
	link->priv = dev;

	iface = dev->priv;
	local = iface->local;
	local->link = link;
	strcpy(local->node.dev_name, dev->name);
	link->dev = &local->node;

	/*
	 * 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.
	 */
	if (link->conf.Attributes & CONF_ENABLE_IRQ) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
		link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
		link->irq.IRQInfo1 = IRQ_LEVEL_ID;
#else
		int i;
		link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
		link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
		if (irq_list[0] == -1)
			link->irq.IRQInfo2 = irq_mask;
		else
			for (i = 0; i < 4; i++)
				link->irq.IRQInfo2 |= 1 << irq_list[i];
#endif
		link->irq.Handler = prism2_interrupt;
		link->irq.Instance = dev;
		CS_CHECK(RequestIRQ,
			 pcmcia_request_irq(link->handle, &link->irq));
	}

	/*
	 * 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));

	dev->irq = link->irq.AssignedIRQ;
	dev->base_addr = link->io.BasePort1;

	/* Finally, report what we've done */
	printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
	       dev_info, 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);
	if (link->conf.Attributes & CONF_ENABLE_IRQ)
		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");

	link->state |= DEV_CONFIG;
	link->state &= ~DEV_CONFIG_PENDING;

	local->shutdown = 0;

	sandisk_enable_wireless(dev);

	ret = prism2_hw_config(dev, 1);
	if (!ret) {
		ret = hostap_hw_ready(dev);
		if (ret == 0 && local->ddev)
			strcpy(local->node.dev_name, local->ddev->name);
	}
	return ret;

 cs_failed:
	cs_error(link->handle, last_fn, last_ret);

 failed:
	prism2_release((u_long)link);
	return 1;
}


static void prism2_release(u_long arg)
{
	dev_link_t *link = (dev_link_t *)arg;

	PDEBUG(DEBUG_FLOW, "prism2_release\n");

	if (link->priv) {
		struct net_device *dev = link->priv;
		struct hostap_interface *iface = dev->priv;
		if (link->state & DEV_CONFIG)
			prism2_hw_shutdown(dev, 0);
		iface->local->shutdown = 1;
	}

	if (link->win)
		pcmcia_release_window(link->win);
	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;

	PDEBUG(DEBUG_FLOW, "release - done\n");
}


static int prism2_event(event_t event, int priority,
			event_callback_args_t *args)
{
	dev_link_t *link = args->client_data;
	struct net_device *dev = (struct net_device *) link->priv;

	switch (event) {
	case CS_EVENT_CARD_INSERTION:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_CARD_INSERTION\n", dev_info);
		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
		if (prism2_config(link)) {
			PDEBUG(DEBUG_EXTRA, "prism2_config() failed\n");
		}
		break;

	case CS_EVENT_CARD_REMOVAL:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_CARD_REMOVAL\n", dev_info);
		link->state &= ~DEV_PRESENT;
		if (link->state & DEV_CONFIG) {
			netif_stop_queue(dev);
			netif_device_detach(dev);
			prism2_release((u_long) link);
		}
		break;

	case CS_EVENT_PM_SUSPEND:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_PM_SUSPEND\n", dev_info);
		link->state |= DEV_SUSPEND;
		/* fall through */

	case CS_EVENT_RESET_PHYSICAL:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_RESET_PHYSICAL\n", dev_info);
		if (link->state & DEV_CONFIG) {
			if (link->open) {
				netif_stop_queue(dev);
				netif_device_detach(dev);
			}
			prism2_suspend(dev);
			pcmcia_release_configuration(link->handle);
		}
		break;

	case CS_EVENT_PM_RESUME:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_PM_RESUME\n", dev_info);
		link->state &= ~DEV_SUSPEND;
		/* fall through */

	case CS_EVENT_CARD_RESET:
		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_CARD_RESET\n", dev_info);
		if (link->state & DEV_CONFIG) {
			pcmcia_request_configuration(link->handle,
						     &link->conf);
			prism2_hw_shutdown(dev, 1);
			prism2_hw_config(dev, link->open ? 0 : 1);
			if (link->open) {
				netif_device_attach(dev);
				netif_start_queue(dev);
			}
		}
		break;

	default:
		PDEBUG(DEBUG_EXTRA, "%s: prism2_event() - unknown event %d\n",
		       dev_info, event);
		break;
	}
	return 0;
}


#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,67)
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
static struct pcmcia_device_id hostap_cs_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x000b, 0x7100),
	PCMCIA_DEVICE_MANF_CARD(0x000b, 0x7300),
	PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0777),
	PCMCIA_DEVICE_MANF_CARD(0x0126, 0x8000),
	PCMCIA_DEVICE_MANF_CARD(0x0138, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0x0156, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0x0250, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1612),
	PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1613),
	PCMCIA_DEVICE_MANF_CARD(0x028a, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0x02aa, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0x02d2, 0x0001),
	PCMCIA_DEVICE_MANF_CARD(0x1668, 0x0101),
	PCMCIA_DEVICE_MANF_CARD(0x50c2, 0x0001),
	PCMCIA_DEVICE_MANF_CARD(0x50c2, 0x7300),
	PCMCIA_DEVICE_MANF_CARD(0xc00f, 0x0000),
	PCMCIA_DEVICE_MANF_CARD(0xd601, 0x0002),
	PCMCIA_DEVICE_MANF_CARD(0xd601, 0x0005),
	PCMCIA_DEVICE_MANF_CARD(0xd601, 0x0010),
	PCMCIA_MFC_DEVICE_PROD_ID12(0, "SanDisk", "ConnectPlus",
				    0x7a954bd9, 0x74be00c6),
	PCMCIA_DEVICE_PROD_ID1234(
		"Intersil", "PRISM 2_5 PCMCIA ADAPTER",	"ISL37300P",
		"Eval-RevA",
		0x4b801a17, 0x6345a0bf, 0xc9049a39, 0xc23adc0e),
	PCMCIA_DEVICE_PROD_ID123(
		"Addtron", "AWP-100 Wireless PCMCIA", "Version 01.02",
		0xe6ec52ce, 0x08649af2, 0x4b74baa0),
	PCMCIA_DEVICE_PROD_ID123(
		"D", "Link DWL-650 11Mbps WLAN Card", "Version 01.02",
		0x71b18589, 0xb6f1b0ab, 0x4b74baa0),
	PCMCIA_DEVICE_PROD_ID123(
		"Instant Wireless ", " Network PC CARD", "Version 01.02",
		0x11d901af, 0x6e9bd926, 0x4b74baa0),
	PCMCIA_DEVICE_PROD_ID123(
		"SMC", "SMC2632W", "Version 01.02",
		0xc4f8b18b, 0x474a1f2a, 0x4b74baa0),
	PCMCIA_DEVICE_PROD_ID12("Compaq", "WL200_11Mbps_Wireless_PCI_Card",
				0x54f7c49c, 0x15a75e5b),
	PCMCIA_DEVICE_PROD_ID12("INTERSIL", "HFA384x/IEEE",
				0x74c5e40d, 0xdb472a18),
	PCMCIA_DEVICE_PROD_ID12("Linksys", "Wireless CompactFlash Card",
				0x0733cc81, 0x0c52f395),
	PCMCIA_DEVICE_PROD_ID12(
		"ZoomAir 11Mbps High", "Rate wireless Networking",
		0x273fe3db, 0x32a1eaee),
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, hostap_cs_ids);
#endif /* >= 2.6.13 */

static struct pcmcia_driver hostap_driver = {
	.drv		= {
		.name	= "hostap_cs",
	},
	.attach		= prism2_attach,
	.detach		= prism2_detach,
	.owner		= THIS_MODULE,
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13))
	.event		= prism2_event,
	.id_table	= hostap_cs_ids,
#endif
};

static int __init init_prism2_pccard(void)
{
	printk(KERN_INFO "%s: %s\n", dev_info, version);
	return pcmcia_register_driver(&hostap_driver);
}

static void __exit exit_prism2_pccard(void)
{
	pcmcia_unregister_driver(&hostap_driver);
	printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
}

#else

static int __init init_prism2_pccard(void)
{
	servinfo_t serv;

	printk(KERN_INFO "%s: %s\n", dev_info, version);
	pcmcia_get_card_services_info(&serv);
	if (serv.Revision != CS_RELEASE_CODE) {
		printk(KERN_NOTICE
		       "%s: CardServices release does not match!\n", dev_info);
		return -1;
	}
	register_pccard_driver(&dev_info, &prism2_attach, &prism2_detach);

	return 0;
}


static void __exit exit_prism2_pccard(void)
{
	unregister_pccard_driver(&dev_info);
	while (dev_list) {
		PDEBUG(DEBUG_FLOW, "exit_prism2 - detaching device\n");
		if (dev_list->state & DEV_CONFIG)
			prism2_release((u_long)dev_list);
		prism2_detach(dev_list);
	}

	printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
}
#endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2,5,67) */


module_init(init_prism2_pccard);
module_exit(exit_prism2_pccard);