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