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path: root/drivers/isdn/hisax/teles_cs.c
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Diffstat (limited to 'drivers/isdn/hisax/teles_cs.c')
-rw-r--r--drivers/isdn/hisax/teles_cs.c513
1 files changed, 513 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/teles_cs.c b/drivers/isdn/hisax/teles_cs.c
new file mode 100644
index 00000000000..63e8e20c17a
--- /dev/null
+++ b/drivers/isdn/hisax/teles_cs.c
@@ -0,0 +1,513 @@
+/* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
+/*======================================================================
+
+ A teles S0 PCMCIA client driver
+
+ Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
+ Written by Christof Petig, christof.petig@wtal.de
+
+ Also inspired by ELSA PCMCIA driver
+ by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
+
+ Extentions to new hisax_pcmcia by Karsten Keil
+
+ minor changes to be compatible with kernel 2.4.x
+ by Jan.Schubert@GMX.li
+
+======================================================================*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ioport.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/cisreg.h>
+#include <pcmcia/ds.h>
+#include "hisax_cfg.h"
+
+MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
+MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
+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 =
+"teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+static int protocol = 2; /* EURO-ISDN Default */
+module_param(protocol, 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 teles_cs event
+ handler.
+*/
+
+static void teles_cs_config(dev_link_t *link);
+static void teles_cs_release(dev_link_t *link);
+static int teles_cs_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 *teles_attach(void);
+static void teles_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 = "teles_cs";
+
+/*
+ A linked list of "instances" of the teles_cs 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.
+
+ To simplify the data structure handling, we actually include the
+ dev_link_t structure in the device's private data structure.
+
+ 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_link_t link;
+ dev_node_t node;
+ int busy;
+ int cardnr;
+} local_info_t;
+
+/*======================================================================
+
+ teles_attach() creates an "instance" of the driver, allocatingx
+ 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 *teles_attach(void)
+{
+ client_reg_t client_reg;
+ dev_link_t *link;
+ local_info_t *local;
+ int ret;
+
+ DEBUG(0, "teles_attach()\n");
+
+ /* Allocate space for private device-specific data */
+ local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
+ if (!local) return NULL;
+ memset(local, 0, sizeof(local_info_t));
+ local->cardnr = -1;
+ link = &local->link; link->priv = local;
+
+ /* Interrupt setup */
+ link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
+ link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_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->io.NumPorts1 = 96;
+ link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+ link->io.IOAddrLines = 5;
+
+ link->conf.Attributes = CONF_ENABLE_IRQ;
+ link->conf.Vcc = 50;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+
+ /* 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 = &teles_cs_event;
+ 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);
+ teles_detach(link);
+ return NULL;
+ }
+
+ return link;
+} /* teles_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 teles_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+ local_info_t *info = link->priv;
+ int ret;
+
+ DEBUG(0, "teles_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)
+ teles_cs_release(link);
+
+ /* Break the link with Card Services */
+ if (link->handle) {
+ ret = pcmcia_deregister_client(link->handle);
+ if (ret != CS_SUCCESS)
+ cs_error(link->handle, DeregisterClient, ret);
+ }
+
+ /* Unlink device structure and free it */
+ *linkp = link->next;
+ kfree(info);
+
+} /* teles_detach */
+
+/*======================================================================
+
+ teles_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.
+
+======================================================================*/
+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 teles_cs_config(dev_link_t *link)
+{
+ client_handle_t handle;
+ tuple_t tuple;
+ cisparse_t parse;
+ local_info_t *dev;
+ int i, j, last_fn;
+ u_short buf[128];
+ cistpl_cftable_entry_t *cf = &parse.cftable_entry;
+ IsdnCard_t icard;
+
+ DEBUG(0, "teles_config(0x%p)\n", link);
+ handle = link->handle;
+ dev = link->priv;
+
+ /*
+ This reads the card's CONFIG tuple to find its configuration
+ registers.
+ */
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ tuple.TupleData = (cisdata_t *)buf;
+ tuple.TupleDataMax = 255;
+ tuple.TupleOffset = 0;
+ tuple.Attributes = 0;
+ i = first_tuple(handle, &tuple, &parse);
+ if (i != CS_SUCCESS) {
+ last_fn = ParseTuple;
+ goto cs_failed;
+ }
+ link->conf.ConfigBase = parse.config.base;
+ link->conf.Present = parse.config.rmask[0];
+
+ /* Configure card */
+ link->state |= DEV_CONFIG;
+
+ 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) && cf->io.win[0].base) {
+ printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
+ link->conf.ConfigIndex = cf->index;
+ link->io.BasePort1 = cf->io.win[0].base;
+ i = pcmcia_request_io(link->handle, &link->io);
+ if (i == CS_SUCCESS) break;
+ } else {
+ printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
+ link->conf.ConfigIndex = cf->index;
+ for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
+ link->io.BasePort1 = j;
+ i = pcmcia_request_io(link->handle, &link->io);
+ if (i == CS_SUCCESS) break;
+ }
+ break;
+ }
+ i = next_tuple(handle, &tuple, &parse);
+ }
+
+ if (i != CS_SUCCESS) {
+ last_fn = RequestIO;
+ goto cs_failed;
+ }
+
+ i = pcmcia_request_irq(link->handle, &link->irq);
+ if (i != CS_SUCCESS) {
+ link->irq.AssignedIRQ = 0;
+ last_fn = RequestIRQ;
+ goto cs_failed;
+ }
+
+ i = pcmcia_request_configuration(link->handle, &link->conf);
+ if (i != CS_SUCCESS) {
+ last_fn = RequestConfiguration;
+ goto cs_failed;
+ }
+
+ /* At this point, the dev_node_t structure(s) should be
+ initialized and arranged in a linked list at link->dev. *//* */
+ sprintf(dev->node.dev_name, "teles");
+ dev->node.major = dev->node.minor = 0x0;
+
+ link->dev = &dev->node;
+
+ /* Finally, report what we've done */
+ printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
+ dev->node.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);
+ 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;
+
+ icard.para[0] = link->irq.AssignedIRQ;
+ icard.para[1] = link->io.BasePort1;
+ icard.protocol = protocol;
+ icard.typ = ISDN_CTYPE_TELESPCMCIA;
+
+ i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
+ if (i < 0) {
+ printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
+ i, link->io.BasePort1);
+ teles_cs_release(link);
+ } else
+ ((local_info_t*)link->priv)->cardnr = i;
+
+ return;
+cs_failed:
+ cs_error(link->handle, last_fn, i);
+ teles_cs_release(link);
+} /* teles_cs_config */
+
+/*======================================================================
+
+ After a card is removed, teles_cs_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 teles_cs_release(dev_link_t *link)
+{
+ local_info_t *local = link->priv;
+
+ DEBUG(0, "teles_cs_release(0x%p)\n", link);
+
+ if (local) {
+ if (local->cardnr >= 0) {
+ /* no unregister function with hisax */
+ HiSax_closecard(local->cardnr);
+ }
+ }
+ /* Unlink the device chain */
+ link->dev = NULL;
+
+ /* Don't bother checking to see if these succeed or not */
+ if (link->win)
+ pcmcia_release_window(link->win);
+ pcmcia_release_configuration(link->handle);
+ pcmcia_release_io(link->handle, &link->io);
+ pcmcia_release_irq(link->handle, &link->irq);
+ link->state &= ~DEV_CONFIG;
+} /* teles_cs_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 teles_cs_event(event_t event, int priority,
+ event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+ local_info_t *dev = link->priv;
+
+ DEBUG(1, "teles_cs_event(%d)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG) {
+ ((local_info_t*)link->priv)->busy = 1;
+ teles_cs_release(link);
+ }
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ teles_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 */
+ dev->busy = 1;
+ 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);
+ dev->busy = 0;
+ break;
+ }
+ return 0;
+} /* teles_cs_event */
+
+static struct pcmcia_driver teles_cs_driver = {
+ .owner = THIS_MODULE,
+ .drv = {
+ .name = "teles_cs",
+ },
+ .attach = teles_attach,
+ .detach = teles_detach,
+};
+
+static int __init init_teles_cs(void)
+{
+ return pcmcia_register_driver(&teles_cs_driver);
+}
+
+static void __exit exit_teles_cs(void)
+{
+ pcmcia_unregister_driver(&teles_cs_driver);
+ BUG_ON(dev_list != NULL);
+}
+
+module_init(init_teles_cs);
+module_exit(exit_teles_cs);
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