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path: root/drivers/isdn/hisax/avma1_cs.c
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Diffstat (limited to 'drivers/isdn/hisax/avma1_cs.c')
-rw-r--r--drivers/isdn/hisax/avma1_cs.c527
1 files changed, 527 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/avma1_cs.c b/drivers/isdn/hisax/avma1_cs.c
new file mode 100644
index 000000000000..663a0bf703b7
--- /dev/null
+++ b/drivers/isdn/hisax/avma1_cs.c
@@ -0,0 +1,527 @@
+/*
+ * PCMCIA client driver for AVM A1 / Fritz!PCMCIA
+ *
+ * Author Carsten Paeth
+ * Copyright 1998-2001 by Carsten Paeth <calle@calle.in-berlin.de>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#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 <asm/io.h>
+#include <asm/system.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include "hisax_cfg.h"
+
+MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
+MODULE_AUTHOR("Carsten Paeth");
+MODULE_LICENSE("GPL");
+
+/*
+ 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);
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
+static char *version =
+"avma1_cs.c 1.00 1998/01/23 10:00:00 (Carsten Paeth)";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+static int isdnprot = 2;
+
+module_param(isdnprot, int, 0);
+
+/*====================================================================*/
+
+/*
+ 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 skeleton event
+ handler.
+*/
+
+static void avma1cs_config(dev_link_t *link);
+static void avma1cs_release(dev_link_t *link);
+static int avma1cs_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 *avma1cs_attach(void);
+static void avma1cs_detach(dev_link_t *);
+
+/*
+ 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 = "avma1_cs";
+
+/*
+ A linked list of "instances" of the skeleton 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 can't be allocated dynamically.
+*/
+
+typedef struct local_info_t {
+ dev_node_t node;
+} local_info_t;
+
+/*======================================================================
+
+ avma1cs_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 *avma1cs_attach(void)
+{
+ client_reg_t client_reg;
+ dev_link_t *link;
+ local_info_t *local;
+ int ret;
+
+ DEBUG(0, "avma1cs_attach()\n");
+
+ /* Initialize the dev_link_t structure */
+ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
+ if (!link)
+ return NULL;
+ memset(link, 0, sizeof(struct dev_link_t));
+
+ /* Allocate space for private device-specific data */
+ local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
+ if (!local) {
+ kfree(link);
+ return NULL;
+ }
+ memset(local, 0, sizeof(local_info_t));
+ link->priv = local;
+
+ /* The io structure describes IO port mapping */
+ link->io.NumPorts1 = 16;
+ link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+ link->io.NumPorts2 = 16;
+ link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
+ link->io.IOAddrLines = 5;
+
+ /* Interrupt setup */
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
+ link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
+
+ link->irq.IRQInfo1 = IRQ_LEVEL_ID;
+
+ /* General socket configuration */
+ link->conf.Attributes = CONF_ENABLE_IRQ;
+ link->conf.Vcc = 50;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+ link->conf.ConfigIndex = 1;
+ link->conf.Present = PRESENT_OPTION;
+
+ /* 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 = &avma1cs_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);
+ avma1cs_detach(link);
+ return NULL;
+ }
+
+ return link;
+} /* avma1cs_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 avma1cs_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+
+ DEBUG(0, "avma1cs_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 the device is currently configured and active, we won't
+ actually delete it yet. Instead, it is marked so that when
+ the release() function is called, that will trigger a proper
+ detach().
+ */
+ if (link->state & DEV_CONFIG) {
+#ifdef PCMCIA_DEBUG
+ printk(KERN_DEBUG "avma1_cs: detach postponed, '%s' "
+ "still locked\n", link->dev->dev_name);
+#endif
+ link->state |= DEV_STALE_LINK;
+ return;
+ }
+
+ /* 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);
+
+} /* avma1cs_detach */
+
+/*======================================================================
+
+ avma1cs_config() is scheduled to run after a CARD_INSERTION event
+ is received, to configure the PCMCIA socket, and to make the
+ ethernet device available to the system.
+
+======================================================================*/
+
+static int get_tuple(client_handle_t handle, tuple_t *tuple,
+ cisparse_t *parse)
+{
+ int i = pcmcia_get_tuple_data(handle, tuple);
+ if (i != CS_SUCCESS) return i;
+ return pcmcia_parse_tuple(handle, tuple, parse);
+}
+
+static int first_tuple(client_handle_t handle, tuple_t *tuple,
+ cisparse_t *parse)
+{
+ int i = pcmcia_get_first_tuple(handle, tuple);
+ if (i != CS_SUCCESS) return i;
+ return get_tuple(handle, tuple, parse);
+}
+
+static int next_tuple(client_handle_t handle, tuple_t *tuple,
+ cisparse_t *parse)
+{
+ int i = pcmcia_get_next_tuple(handle, tuple);
+ if (i != CS_SUCCESS) return i;
+ return get_tuple(handle, tuple, parse);
+}
+
+static void avma1cs_config(dev_link_t *link)
+{
+ client_handle_t handle;
+ tuple_t tuple;
+ cisparse_t parse;
+ cistpl_cftable_entry_t *cf = &parse.cftable_entry;
+ local_info_t *dev;
+ int i;
+ u_char buf[64];
+ char devname[128];
+ IsdnCard_t icard;
+ int busy = 0;
+
+ handle = link->handle;
+ dev = link->priv;
+
+ DEBUG(0, "avma1cs_config(0x%p)\n", link);
+
+ /*
+ This reads the card's CONFIG tuple to find its configuration
+ registers.
+ */
+ do {
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ i = pcmcia_get_first_tuple(handle, &tuple);
+ if (i != CS_SUCCESS) break;
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = 64;
+ tuple.TupleOffset = 0;
+ i = pcmcia_get_tuple_data(handle, &tuple);
+ if (i != CS_SUCCESS) break;
+ i = pcmcia_parse_tuple(handle, &tuple, &parse);
+ if (i != CS_SUCCESS) break;
+ link->conf.ConfigBase = parse.config.base;
+ } while (0);
+ if (i != CS_SUCCESS) {
+ cs_error(link->handle, ParseTuple, i);
+ link->state &= ~DEV_CONFIG_PENDING;
+ return;
+ }
+
+ /* Configure card */
+ link->state |= DEV_CONFIG;
+
+ do {
+
+ tuple.Attributes = 0;
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = 254;
+ tuple.TupleOffset = 0;
+ tuple.DesiredTuple = CISTPL_VERS_1;
+
+ devname[0] = 0;
+ if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
+ strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1],
+ sizeof(devname));
+ }
+ /*
+ * find IO port
+ */
+ tuple.TupleData = (cisdata_t *)buf;
+ tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
+ tuple.Attributes = 0;
+ tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+ i = first_tuple(handle, &tuple, &parse);
+ while (i == CS_SUCCESS) {
+ if (cf->io.nwin > 0) {
+ link->conf.ConfigIndex = cf->index;
+ link->io.BasePort1 = cf->io.win[0].base;
+ link->io.NumPorts1 = cf->io.win[0].len;
+ link->io.NumPorts2 = 0;
+ printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
+ link->io.BasePort1,
+ link->io.BasePort1+link->io.NumPorts1 - 1);
+ i = pcmcia_request_io(link->handle, &link->io);
+ if (i == CS_SUCCESS) goto found_port;
+ }
+ i = next_tuple(handle, &tuple, &parse);
+ }
+
+found_port:
+ if (i != CS_SUCCESS) {
+ cs_error(link->handle, RequestIO, i);
+ break;
+ }
+
+ /*
+ * allocate an interrupt line
+ */
+ i = pcmcia_request_irq(link->handle, &link->irq);
+ if (i != CS_SUCCESS) {
+ cs_error(link->handle, RequestIRQ, i);
+ pcmcia_release_io(link->handle, &link->io);
+ break;
+ }
+
+ /*
+ * configure the PCMCIA socket
+ */
+ i = pcmcia_request_configuration(link->handle, &link->conf);
+ if (i != CS_SUCCESS) {
+ cs_error(link->handle, RequestConfiguration, i);
+ pcmcia_release_io(link->handle, &link->io);
+ pcmcia_release_irq(link->handle, &link->irq);
+ break;
+ }
+
+ } while (0);
+
+ /* At this point, the dev_node_t structure(s) should be
+ initialized and arranged in a linked list at link->dev. */
+
+ strcpy(dev->node.dev_name, "A1");
+ dev->node.major = 45;
+ dev->node.minor = 0;
+ link->dev = &dev->node;
+
+ link->state &= ~DEV_CONFIG_PENDING;
+ /* If any step failed, release any partially configured state */
+ if (i != 0) {
+ avma1cs_release(link);
+ return;
+ }
+
+ printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
+ link->io.BasePort1, link->irq.AssignedIRQ);
+
+ icard.para[0] = link->irq.AssignedIRQ;
+ icard.para[1] = link->io.BasePort1;
+ icard.protocol = isdnprot;
+ icard.typ = ISDN_CTYPE_A1_PCMCIA;
+
+ i = hisax_init_pcmcia(link, &busy, &icard);
+ if (i < 0) {
+ printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
+ avma1cs_release(link);
+ return;
+ }
+ dev->node.minor = i;
+
+} /* avma1cs_config */
+
+/*======================================================================
+
+ After a card is removed, avma1cs_release() will unregister the net
+ device, and release the PCMCIA configuration. If the device is
+ still open, this will be postponed until it is closed.
+
+======================================================================*/
+
+static void avma1cs_release(dev_link_t *link)
+{
+ local_info_t *local = link->priv;
+
+ DEBUG(0, "avma1cs_release(0x%p)\n", link);
+
+ /* no unregister function with hisax */
+ HiSax_closecard(local->node.minor);
+
+ /* Unlink the device chain */
+ link->dev = NULL;
+
+ /* Don't bother checking to see if these succeed or not */
+ pcmcia_release_configuration(link->handle);
+ pcmcia_release_io(link->handle, &link->io);
+ pcmcia_release_irq(link->handle, &link->irq);
+ link->state &= ~DEV_CONFIG;
+
+ if (link->state & DEV_STALE_LINK)
+ avma1cs_detach(link);
+} /* avma1cs_release */
+
+/*======================================================================
+
+ The card status event handler. Mostly, this schedules other
+ stuff to run after an event is received. A CARD_REMOVAL event
+ also sets some flags to discourage the net drivers from trying
+ to talk to the card any more.
+
+ When a CARD_REMOVAL event is received, we immediately set a 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 avma1cs_event(event_t event, int priority,
+ event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+
+ DEBUG(1, "avma1cs_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ if (link->state & DEV_CONFIG)
+ avma1cs_release(link);
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ avma1cs_config(link);
+ break;
+ case CS_EVENT_PM_SUSPEND:
+ link->state |= DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_RESET_PHYSICAL:
+ if (link->state & DEV_CONFIG)
+ 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);
+ break;
+ }
+ return 0;
+} /* avma1cs_event */
+
+static struct pcmcia_driver avma1cs_driver = {
+ .owner = THIS_MODULE,
+ .drv = {
+ .name = "avma1_cs",
+ },
+ .attach = avma1cs_attach,
+ .detach = avma1cs_detach,
+};
+
+/*====================================================================*/
+
+static int __init init_avma1_cs(void)
+{
+ return(pcmcia_register_driver(&avma1cs_driver));
+}
+
+static void __exit exit_avma1_cs(void)
+{
+ pcmcia_unregister_driver(&avma1cs_driver);
+ BUG_ON(dev_list != NULL);
+}
+
+module_init(init_avma1_cs);
+module_exit(exit_avma1_cs);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-23 11:37:40 +0300