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linux-stable-rt/drivers/isdn/hisax/teles_cs.c

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/* $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/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 int teles_cs_config(struct pcmcia_device *link);
static void teles_cs_release(struct pcmcia_device *link);
/*
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 void teles_detach(struct pcmcia_device *p_dev);
/*
A linked list of "instances" of the teles_cs device. Each actual
PCMCIA card corresponds to one device instance, and is described
by one struct pcmcia_device 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 struct pcmcia_device pointers, where minor
device numbers are used to derive the corresponding array index.
*/
/*
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 struct pcmcia_device
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 {
struct pcmcia_device *p_dev;
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 int teles_probe(struct pcmcia_device *link)
{
local_info_t *local;
DEBUG(0, "teles_attach()\n");
/* Allocate space for private device-specific data */
local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
if (!local) return -ENOMEM;
local->cardnr = -1;
local->p_dev = 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.IntType = INT_MEMORY_AND_IO;
return teles_cs_config(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(struct pcmcia_device *link)
{
local_info_t *info = link->priv;
DEBUG(0, "teles_detach(0x%p)\n", link);
info->busy = 1;
teles_cs_release(link);
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(struct pcmcia_device *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(struct pcmcia_device *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(struct pcmcia_device *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 int teles_cs_config(struct pcmcia_device *link)
{
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);
dev = link->priv;
tuple.TupleData = (cisdata_t *)buf;
tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
tuple.Attributes = 0;
tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
i = first_tuple(link, &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, &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, &link->io);
if (i == CS_SUCCESS) break;
}
break;
}
i = next_tuple(link, &tuple, &parse);
}
if (i != CS_SUCCESS) {
last_fn = RequestIO;
goto cs_failed;
}
i = pcmcia_request_irq(link, &link->irq);
if (i != CS_SUCCESS) {
link->irq.AssignedIRQ = 0;
last_fn = RequestIRQ;
goto cs_failed;
}
i = pcmcia_request_configuration(link, &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_node = &dev->node;
/* Finally, report what we've done */
printk(KERN_INFO "%s: index 0x%02x:",
dev->node.dev_name, link->conf.ConfigIndex);
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");
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);
return -ENODEV;
}
((local_info_t*)link->priv)->cardnr = i;
return 0;
cs_failed:
cs_error(link, last_fn, i);
teles_cs_release(link);
return -ENODEV;
} /* 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(struct pcmcia_device *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);
}
}
pcmcia_disable_device(link);
} /* teles_cs_release */
static int teles_suspend(struct pcmcia_device *link)
{
local_info_t *dev = link->priv;
dev->busy = 1;
return 0;
}
static int teles_resume(struct pcmcia_device *link)
{
local_info_t *dev = link->priv;
dev->busy = 0;
return 0;
}
static struct pcmcia_device_id teles_ids[] = {
PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, teles_ids);
static struct pcmcia_driver teles_cs_driver = {
.owner = THIS_MODULE,
.drv = {
.name = "teles_cs",
},
.probe = teles_probe,
.remove = teles_detach,
.id_table = teles_ids,
.suspend = teles_suspend,
.resume = teles_resume,
};
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);
}
module_init(init_teles_cs);
module_exit(exit_teles_cs);
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