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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/wireless/atmel_cs.c
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!
Diffstat (limited to 'drivers/net/wireless/atmel_cs.c')
-rw-r--r--drivers/net/wireless/atmel_cs.c708
1 files changed, 708 insertions, 0 deletions
diff --git a/drivers/net/wireless/atmel_cs.c b/drivers/net/wireless/atmel_cs.c
new file mode 100644
index 000000000000..a91b507e0a7a
--- /dev/null
+++ b/drivers/net/wireless/atmel_cs.c
@@ -0,0 +1,708 @@
+/*** -*- linux-c -*- **********************************************************
+
+ Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
+
+ Copyright 2000-2001 ATMEL Corporation.
+ Copyright 2003 Simon Kelley.
+
+ This code was developed from version 2.1.1 of the Atmel drivers,
+ released by Atmel corp. under the GPL in December 2002. It also
+ includes code from the Linux aironet drivers (C) Benjamin Reed,
+ and the Linux PCMCIA package, (C) David Hinds.
+
+ For all queries about this code, please contact the current author,
+ Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
+
+ 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 software 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.
+
+ You should have received a copy of the GNU General Public License
+ along with Atmel wireless lan drivers; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+******************************************************************************/
+
+#include <linux/config.h>
+#ifdef __IN_PCMCIA_PACKAGE__
+#include <pcmcia/k_compat.h>
+#endif
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/netdevice.h>
+#include <linux/moduleparam.h>
+#include <linux/device.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 <pcmcia/ciscode.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <linux/wireless.h>
+
+#include "atmel.h"
+
+/*
+ All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
+ you do not define PCMCIA_DEBUG at all, all the debug code will be
+ left out. If you compile with PCMCIA_DEBUG=0, the debug code will
+ be present but disabled -- but it can then be enabled for specific
+ modules at load time with a 'pc_debug=#' option to insmod.
+*/
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+module_param(pc_debug, int, 0);
+static char *version = "$Revision: 1.2 $";
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+MODULE_AUTHOR("Simon Kelley");
+MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
+
+/*====================================================================*/
+
+/*
+ The event() function is this driver's Card Services event handler.
+ It will be called by Card Services when an appropriate card status
+ event is received. The config() and release() entry points are
+ used to configure or release a socket, in response to card
+ insertion and ejection events. They are invoked from the atmel_cs
+ event handler.
+*/
+
+static void atmel_config(dev_link_t *link);
+static void atmel_release(dev_link_t *link);
+static int atmel_event(event_t event, int priority,
+ event_callback_args_t *args);
+
+/*
+ The attach() and detach() entry points are used to create and destroy
+ "instances" of the driver, where each instance represents everything
+ needed to manage one actual PCMCIA card.
+*/
+
+static dev_link_t *atmel_attach(void);
+static void atmel_detach(dev_link_t *);
+
+/*
+ You'll also need to prototype all the functions that will actually
+ be used to talk to your device. See 'pcmem_cs' for a good example
+ of a fully self-sufficient driver; the other drivers rely more or
+ less on other parts of the kernel.
+*/
+
+/*
+ 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 = "atmel_cs";
+
+/*
+ A linked list of "instances" of the atmelnet device. Each actual
+ PCMCIA card corresponds to one device instance, and is described
+ by one dev_link_t structure (defined in ds.h).
+
+ You may not want to use a linked list for this -- for example, the
+ memory card driver uses an array of dev_link_t pointers, where minor
+ device numbers are used to derive the corresponding array index.
+*/
+
+static dev_link_t *dev_list = NULL;
+
+/*
+ A dev_link_t structure has fields for most things that are needed
+ to keep track of a socket, but there will usually be some device
+ specific information that also needs to be kept track of. The
+ 'priv' pointer in a dev_link_t structure can be used to point to
+ a device-specific private data structure, like this.
+
+ A driver needs to provide a dev_node_t structure for each device
+ on a card. In some cases, there is only one device per card (for
+ example, ethernet cards, modems). In other cases, there may be
+ many actual or logical devices (SCSI adapters, memory cards with
+ multiple partitions). The dev_node_t structures need to be kept
+ in a linked list starting at the 'dev' field of a dev_link_t
+ structure. We allocate them in the card's private data structure,
+ because they generally shouldn't be allocated dynamically.
+
+ In this case, we also provide a flag to indicate if a device is
+ "stopped" due to a power management event, or card ejection. The
+ device IO routines can use a flag like this to throttle IO to a
+ card that is not ready to accept it.
+*/
+
+typedef struct local_info_t {
+ dev_node_t node;
+ struct net_device *eth_dev;
+} local_info_t;
+
+/*======================================================================
+
+ atmel_attach() 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 *atmel_attach(void)
+{
+ client_reg_t client_reg;
+ dev_link_t *link;
+ local_info_t *local;
+ int ret;
+
+ DEBUG(0, "atmel_attach()\n");
+
+ /* Initialize the dev_link_t structure */
+ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
+ if (!link) {
+ printk(KERN_ERR "atmel_cs: no memory for new device\n");
+ return NULL;
+ }
+ memset(link, 0, sizeof(struct dev_link_t));
+
+ /* Interrupt setup */
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
+ link->irq.IRQInfo1 = IRQ_LEVEL_ID;
+ link->irq.Handler = NULL;
+
+ /*
+ 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.Vcc = 50;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+
+ /* Allocate space for private device-specific data */
+ local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
+ if (!local) {
+ printk(KERN_ERR "atmel_cs: no memory for new device\n");
+ kfree (link);
+ return NULL;
+ }
+ memset(local, 0, sizeof(local_info_t));
+ link->priv = local;
+
+ /* Register with Card Services */
+ 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 = &atmel_event;
+ client_reg.Version = 0x0210;
+ client_reg.event_callback_args.client_data = link;
+ ret = pcmcia_register_client(&link->handle, &client_reg);
+ if (ret != 0) {
+ cs_error(link->handle, RegisterClient, ret);
+ atmel_detach(link);
+ return NULL;
+ }
+
+ return link;
+} /* atmel_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 atmel_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+
+ DEBUG(0, "atmel_detach(0x%p)\n", link);
+
+ /* Locate device structure */
+ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+ if (*linkp == link) break;
+ if (*linkp == NULL)
+ return;
+
+ if (link->state & DEV_CONFIG)
+ atmel_release(link);
+
+ /* Break the link with Card Services */
+ if (link->handle)
+ pcmcia_deregister_client(link->handle);
+
+ /* Unlink device structure, free pieces */
+ *linkp = link->next;
+ if (link->priv)
+ kfree(link->priv);
+ kfree(link);
+}
+
+/*======================================================================
+
+ atmel_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)
+
+/* Call-back function to interrogate PCMCIA-specific information
+ about the current existance of the card */
+static int card_present(void *arg)
+{
+ dev_link_t *link = (dev_link_t *)arg;
+ if (link->state & DEV_SUSPEND)
+ return 0;
+ else if (link->state & DEV_PRESENT)
+ return 1;
+
+ return 0;
+}
+
+/* list of cards we know about and their firmware requirements.
+ Go either by Manfid or version strings.
+ Cards not in this list will need a firmware parameter to the module
+ in all probability. Note that the SMC 2632 V2 and V3 have the same
+ manfids, so we ignore those and use the version1 strings. */
+
+static struct {
+ int manf, card;
+ char *ver1;
+ AtmelFWType firmware;
+ char *name;
+} card_table[] = {
+ { 0, 0, "WLAN/802.11b PC CARD", ATMEL_FW_TYPE_502D, "Actiontec 802CAT1" },
+ { 0, 0, "ATMEL/AT76C502AR", ATMEL_FW_TYPE_502, "NoName-RFMD" },
+ { 0, 0, "ATMEL/AT76C502AR_D", ATMEL_FW_TYPE_502D, "NoName-revD" },
+ { 0, 0, "ATMEL/AT76C502AR_E", ATMEL_FW_TYPE_502E, "NoName-revE" },
+ { 0, 0, "ATMEL/AT76C504", ATMEL_FW_TYPE_504, "NoName-504" },
+ { 0, 0, "ATMEL/AT76C504A", ATMEL_FW_TYPE_504A_2958, "NoName-504a-2958" },
+ { 0, 0, "ATMEL/AT76C504_R", ATMEL_FW_TYPE_504_2958, "NoName-504-2958" },
+ { MANFID_3COM, 0x0620, NULL, ATMEL_FW_TYPE_502_3COM, "3com 3CRWE62092B" },
+ { MANFID_3COM, 0x0696, NULL, ATMEL_FW_TYPE_502_3COM, "3com 3CRSHPW196" },
+ { 0, 0, "SMC/2632W-V2", ATMEL_FW_TYPE_502, "SMC 2632W-V2" },
+ { 0, 0, "SMC/2632W", ATMEL_FW_TYPE_502D, "SMC 2632W-V3" },
+ { 0xd601, 0x0007, NULL, ATMEL_FW_TYPE_502, "Sitecom WLAN-011" },
+ { 0x01bf, 0x3302, NULL, ATMEL_FW_TYPE_502E, "Belkin F5D6020-V2" },
+ { 0, 0, "BT/Voyager 1020 Laptop Adapter", ATMEL_FW_TYPE_502, "BT Voyager 1020" },
+ { 0, 0, "IEEE 802.11b/Wireless LAN PC Card", ATMEL_FW_TYPE_502, "Siemens Gigaset PC Card II" },
+ { 0, 0, "CNet/CNWLC 11Mbps Wireless PC Card V-5", ATMEL_FW_TYPE_502E, "CNet CNWLC-811ARL" },
+ { 0, 0, "Wireless/PC_CARD", ATMEL_FW_TYPE_502D, "Planet WL-3552" },
+ { 0, 0, "OEM/11Mbps Wireless LAN PC Card V-3", ATMEL_FW_TYPE_502, "OEM 11Mbps WLAN PCMCIA Card" },
+ { 0, 0, "11WAVE/11WP611AL-E", ATMEL_FW_TYPE_502E, "11WAVE WaveBuddy" },
+ { 0, 0, "LG/LW2100N", ATMEL_FW_TYPE_502E, "LG LW2100N 11Mbps WLAN PCMCIA Card" },
+};
+
+static void atmel_config(dev_link_t *link)
+{
+ client_handle_t handle;
+ tuple_t tuple;
+ cisparse_t parse;
+ local_info_t *dev;
+ int last_fn, last_ret;
+ u_char buf[64];
+ int card_index = -1, done = 0;
+
+ handle = link->handle;
+ dev = link->priv;
+
+ DEBUG(0, "atmel_config(0x%p)\n", link);
+
+ tuple.Attributes = 0;
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = sizeof(buf);
+ tuple.TupleOffset = 0;
+
+ tuple.DesiredTuple = CISTPL_MANFID;
+ if (pcmcia_get_first_tuple(handle, &tuple) == 0) {
+ int i;
+ cistpl_manfid_t *manfid;
+ CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+ CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+ manfid = &(parse.manfid);
+ for (i = 0; i < sizeof(card_table)/sizeof(card_table[0]); i++) {
+ if (!card_table[i].ver1 &&
+ manfid->manf == card_table[i].manf &&
+ manfid->card == card_table[i].card) {
+ card_index = i;
+ done = 1;
+ }
+ }
+ }
+
+ tuple.DesiredTuple = CISTPL_VERS_1;
+ if (!done && (pcmcia_get_first_tuple(handle, &tuple) == 0)) {
+ int i, j, k;
+ cistpl_vers_1_t *ver1;
+ CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+ CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+ ver1 = &(parse.version_1);
+
+ for (i = 0; i < sizeof(card_table)/sizeof(card_table[0]); i++) {
+ for (j = 0; j < ver1->ns; j++) {
+ char *p = card_table[i].ver1;
+ char *q = &ver1->str[ver1->ofs[j]];
+ if (!p)
+ goto mismatch;
+ for (k = 0; k < j; k++) {
+ while ((*p != '\0') && (*p != '/')) p++;
+ if (*p == '\0') {
+ if (*q != '\0')
+ goto mismatch;
+ } else {
+ p++;
+ }
+ }
+ while((*q != '\0') && (*p != '\0') &&
+ (*p != '/') && (*p == *q)) p++, q++;
+ if (((*p != '\0') && *p != '/') || *q != '\0')
+ goto mismatch;
+ }
+ card_index = i;
+ break; /* done */
+
+ mismatch:
+ j = 0; /* dummy stmt to shut up compiler */
+ }
+ }
+
+ /*
+ This reads the card's CONFIG tuple to find its configuration
+ registers.
+ */
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ 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;
+
+ /*
+ 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 dflt = { 0 };
+ cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
+ 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))
+ link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
+ else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
+ link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;
+
+ 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;
+
+ /* 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.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:
+ CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
+ }
+
+ /*
+ 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)
+ 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));
+
+ if (link->irq.AssignedIRQ == 0) {
+ printk(KERN_ALERT
+ "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
+ goto cs_failed;
+ }
+
+ ((local_info_t*)link->priv)->eth_dev =
+ init_atmel_card(link->irq.AssignedIRQ,
+ link->io.BasePort1,
+ card_index == -1 ? ATMEL_FW_TYPE_NONE : card_table[card_index].firmware,
+ &handle_to_dev(handle),
+ card_present,
+ link);
+ if (!((local_info_t*)link->priv)->eth_dev)
+ goto cs_failed;
+
+ /*
+ At this point, the dev_node_t structure(s) need to be
+ initialized and arranged in a linked list at link->dev.
+ */
+ strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
+ dev->node.major = dev->node.minor = 0;
+ link->dev = &dev->node;
+
+ /* Finally, report what we've done */
+ printk(KERN_INFO "%s: %s%sindex 0x%02x: Vcc %d.%d",
+ dev->node.dev_name,
+ card_index == -1 ? "" : card_table[card_index].name,
+ card_index == -1 ? "" : " ",
+ 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_PENDING;
+ return;
+
+ cs_failed:
+ cs_error(link->handle, last_fn, last_ret);
+ atmel_release(link);
+}
+
+/*======================================================================
+
+ After a card is removed, atmel_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 atmel_release(dev_link_t *link)
+{
+ struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
+
+ DEBUG(0, "atmel_release(0x%p)\n", link);
+
+ /* Unlink the device chain */
+ link->dev = NULL;
+
+ if (dev)
+ stop_atmel_card(dev, 0);
+ ((local_info_t*)link->priv)->eth_dev = NULL;
+
+ /* 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;
+}
+
+/*======================================================================
+
+ The card status event handler. Mostly, this schedules other
+ stuff to run after an event is received.
+
+ When a CARD_REMOVAL event is received, we immediately set a
+ private flag to block future accesses to this device. All the
+ functions that actually access the device should check this flag
+ to make sure the card is still present.
+
+ ======================================================================*/
+
+static int atmel_event(event_t event, int priority,
+ event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+ local_info_t *local = link->priv;
+
+ DEBUG(1, "atmel_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG) {
+ netif_device_detach(local->eth_dev);
+ atmel_release(link);
+ }
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ atmel_config(link);
+ break;
+ case CS_EVENT_PM_SUSPEND:
+ link->state |= DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_RESET_PHYSICAL:
+ if (link->state & DEV_CONFIG) {
+ netif_device_detach(local->eth_dev);
+ 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) {
+ pcmcia_request_configuration(link->handle, &link->conf);
+ atmel_open(local->eth_dev);
+ netif_device_attach(local->eth_dev);
+ }
+ break;
+ }
+ return 0;
+} /* atmel_event */
+
+/*====================================================================*/
+static struct pcmcia_driver atmel_driver = {
+ .owner = THIS_MODULE,
+ .drv = {
+ .name = "atmel_cs",
+ },
+ .attach = atmel_attach,
+ .detach = atmel_detach,
+};
+
+static int atmel_cs_init(void)
+{
+ return pcmcia_register_driver(&atmel_driver);
+}
+
+static void atmel_cs_cleanup(void)
+{
+ pcmcia_unregister_driver(&atmel_driver);
+ BUG_ON(dev_list != NULL);
+}
+
+/*
+ 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);