51dcdfec6a
PCI parallel port devices can IRQ share so we should stop them hogging the line and making a mess on modern PC systems. We know the sharing side works as the PCMCIA driver has shared the parallel port IRQ for some time. Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
276 lines
8.3 KiB
C
276 lines
8.3 KiB
C
/*======================================================================
|
|
|
|
A driver for PCMCIA parallel port adapters
|
|
|
|
(specifically, for the Quatech SPP-100 EPP card: other cards will
|
|
probably require driver tweaks)
|
|
|
|
parport_cs.c 1.29 2002/10/11 06:57:41
|
|
|
|
The contents of this file are subject to the Mozilla Public
|
|
License Version 1.1 (the "License"); you may not use this file
|
|
except in compliance with the License. You may obtain a copy of
|
|
the License at http://www.mozilla.org/MPL/
|
|
|
|
Software distributed under the License is distributed on an "AS
|
|
IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
implied. See the License for the specific language governing
|
|
rights and limitations under the License.
|
|
|
|
The initial developer of the original code is David A. Hinds
|
|
<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
|
|
are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
|
|
|
|
Alternatively, the contents of this file may be used under the
|
|
terms of the GNU General Public License version 2 (the "GPL"), in
|
|
which case the provisions of the GPL are applicable instead of the
|
|
above. If you wish to allow the use of your version of this file
|
|
only under the terms of the GPL and not to allow others to use
|
|
your version of this file under the MPL, indicate your decision
|
|
by deleting the provisions above and replace them with the notice
|
|
and other provisions required by the GPL. If you do not delete
|
|
the provisions above, a recipient may use your version of this
|
|
file under either the MPL or the GPL.
|
|
|
|
======================================================================*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/major.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/parport.h>
|
|
#include <linux/parport_pc.h>
|
|
|
|
#include <pcmcia/cs_types.h>
|
|
#include <pcmcia/cs.h>
|
|
#include <pcmcia/cistpl.h>
|
|
#include <pcmcia/ds.h>
|
|
#include <pcmcia/cisreg.h>
|
|
#include <pcmcia/ciscode.h>
|
|
|
|
/*====================================================================*/
|
|
|
|
/* Module parameters */
|
|
|
|
MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
|
|
MODULE_DESCRIPTION("PCMCIA parallel port card driver");
|
|
MODULE_LICENSE("Dual MPL/GPL");
|
|
|
|
#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
|
|
|
|
INT_MODULE_PARM(epp_mode, 1);
|
|
|
|
#ifdef PCMCIA_DEBUG
|
|
INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
|
|
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
|
|
static char *version =
|
|
"parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
|
|
#else
|
|
#define DEBUG(n, args...)
|
|
#endif
|
|
|
|
/*====================================================================*/
|
|
|
|
#define FORCE_EPP_MODE 0x08
|
|
|
|
typedef struct parport_info_t {
|
|
struct pcmcia_device *p_dev;
|
|
int ndev;
|
|
dev_node_t node;
|
|
struct parport *port;
|
|
} parport_info_t;
|
|
|
|
static void parport_detach(struct pcmcia_device *p_dev);
|
|
static int parport_config(struct pcmcia_device *link);
|
|
static void parport_cs_release(struct pcmcia_device *);
|
|
|
|
/*======================================================================
|
|
|
|
parport_attach() creates an "instance" of the driver, allocating
|
|
local data structures for one device. The device is registered
|
|
with Card Services.
|
|
|
|
======================================================================*/
|
|
|
|
static int parport_probe(struct pcmcia_device *link)
|
|
{
|
|
parport_info_t *info;
|
|
|
|
DEBUG(0, "parport_attach()\n");
|
|
|
|
/* Create new parport device */
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info) return -ENOMEM;
|
|
link->priv = info;
|
|
info->p_dev = link;
|
|
|
|
link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
|
|
link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
|
|
link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
|
|
link->irq.IRQInfo1 = IRQ_LEVEL_ID;
|
|
link->conf.Attributes = CONF_ENABLE_IRQ;
|
|
link->conf.IntType = INT_MEMORY_AND_IO;
|
|
|
|
return parport_config(link);
|
|
} /* parport_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 parport_detach(struct pcmcia_device *link)
|
|
{
|
|
DEBUG(0, "parport_detach(0x%p)\n", link);
|
|
|
|
parport_cs_release(link);
|
|
|
|
kfree(link->priv);
|
|
} /* parport_detach */
|
|
|
|
/*======================================================================
|
|
|
|
parport_config() is scheduled to run after a CARD_INSERTION event
|
|
is received, to configure the PCMCIA socket, and to make the
|
|
parport device available to the system.
|
|
|
|
======================================================================*/
|
|
|
|
#define CS_CHECK(fn, ret) \
|
|
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
|
|
|
|
static int parport_config_check(struct pcmcia_device *p_dev,
|
|
cistpl_cftable_entry_t *cfg,
|
|
cistpl_cftable_entry_t *dflt,
|
|
unsigned int vcc,
|
|
void *priv_data)
|
|
{
|
|
if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
|
|
cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
|
|
if (epp_mode)
|
|
p_dev->conf.ConfigIndex |= FORCE_EPP_MODE;
|
|
p_dev->io.BasePort1 = io->win[0].base;
|
|
p_dev->io.NumPorts1 = io->win[0].len;
|
|
p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
|
|
if (io->nwin == 2) {
|
|
p_dev->io.BasePort2 = io->win[1].base;
|
|
p_dev->io.NumPorts2 = io->win[1].len;
|
|
}
|
|
if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int parport_config(struct pcmcia_device *link)
|
|
{
|
|
parport_info_t *info = link->priv;
|
|
struct parport *p;
|
|
int last_ret, last_fn;
|
|
|
|
DEBUG(0, "parport_config(0x%p)\n", link);
|
|
|
|
last_ret = pcmcia_loop_config(link, parport_config_check, NULL);
|
|
if (last_ret) {
|
|
cs_error(link, RequestIO, last_ret);
|
|
goto failed;
|
|
}
|
|
|
|
CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
|
|
CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
|
|
|
|
p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
|
|
link->irq.AssignedIRQ, PARPORT_DMA_NONE,
|
|
&link->dev, IRQF_SHARED);
|
|
if (p == NULL) {
|
|
printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
|
|
"0x%3x, irq %u failed\n", link->io.BasePort1,
|
|
link->irq.AssignedIRQ);
|
|
goto failed;
|
|
}
|
|
|
|
p->modes |= PARPORT_MODE_PCSPP;
|
|
if (epp_mode)
|
|
p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
|
|
info->ndev = 1;
|
|
info->node.major = LP_MAJOR;
|
|
info->node.minor = p->number;
|
|
info->port = p;
|
|
strcpy(info->node.dev_name, p->name);
|
|
link->dev_node = &info->node;
|
|
|
|
return 0;
|
|
|
|
cs_failed:
|
|
cs_error(link, last_fn, last_ret);
|
|
failed:
|
|
parport_cs_release(link);
|
|
return -ENODEV;
|
|
} /* parport_config */
|
|
|
|
/*======================================================================
|
|
|
|
After a card is removed, parport_cs_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 parport_cs_release(struct pcmcia_device *link)
|
|
{
|
|
parport_info_t *info = link->priv;
|
|
|
|
DEBUG(0, "parport_release(0x%p)\n", link);
|
|
|
|
if (info->ndev) {
|
|
struct parport *p = info->port;
|
|
parport_pc_unregister_port(p);
|
|
}
|
|
info->ndev = 0;
|
|
|
|
pcmcia_disable_device(link);
|
|
} /* parport_cs_release */
|
|
|
|
|
|
static struct pcmcia_device_id parport_ids[] = {
|
|
PCMCIA_DEVICE_FUNC_ID(3),
|
|
PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc),
|
|
PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
|
|
PCMCIA_DEVICE_NULL
|
|
};
|
|
MODULE_DEVICE_TABLE(pcmcia, parport_ids);
|
|
|
|
static struct pcmcia_driver parport_cs_driver = {
|
|
.owner = THIS_MODULE,
|
|
.drv = {
|
|
.name = "parport_cs",
|
|
},
|
|
.probe = parport_probe,
|
|
.remove = parport_detach,
|
|
.id_table = parport_ids,
|
|
};
|
|
|
|
static int __init init_parport_cs(void)
|
|
{
|
|
return pcmcia_register_driver(&parport_cs_driver);
|
|
}
|
|
|
|
static void __exit exit_parport_cs(void)
|
|
{
|
|
pcmcia_unregister_driver(&parport_cs_driver);
|
|
}
|
|
|
|
module_init(init_parport_cs);
|
|
module_exit(exit_parport_cs);
|