398 lines
12 KiB
C
398 lines
12 KiB
C
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/*======================================================================
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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/sched.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/parport.h>
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#include <linux/parport_pc.h>
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#include <pcmcia/version.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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dev_link_t link;
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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 dev_link_t *parport_attach(void);
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static void parport_detach(dev_link_t *);
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static void parport_config(dev_link_t *link);
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static void parport_cs_release(dev_link_t *);
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static int parport_event(event_t event, int priority,
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event_callback_args_t *args);
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static dev_info_t dev_info = "parport_cs";
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static dev_link_t *dev_list = NULL;
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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 dev_link_t *parport_attach(void)
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{
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parport_info_t *info;
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dev_link_t *link;
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client_reg_t client_reg;
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int ret;
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DEBUG(0, "parport_attach()\n");
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/* Create new parport device */
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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if (!info) return NULL;
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memset(info, 0, sizeof(*info));
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link = &info->link; link->priv = info;
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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_EXCLUSIVE;
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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.Vcc = 50;
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link->conf.IntType = INT_MEMORY_AND_IO;
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/* Register with Card Services */
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link->next = dev_list;
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dev_list = link;
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client_reg.dev_info = &dev_info;
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client_reg.EventMask =
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CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
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CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
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CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
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client_reg.event_handler = &parport_event;
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client_reg.Version = 0x0210;
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client_reg.event_callback_args.client_data = link;
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ret = pcmcia_register_client(&link->handle, &client_reg);
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if (ret != CS_SUCCESS) {
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cs_error(link->handle, RegisterClient, ret);
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parport_detach(link);
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return NULL;
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}
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return 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(dev_link_t *link)
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{
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dev_link_t **linkp;
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int ret;
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DEBUG(0, "parport_detach(0x%p)\n", link);
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/* Locate device structure */
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for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
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if (*linkp == link) break;
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if (*linkp == NULL)
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return;
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if (link->state & DEV_CONFIG)
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parport_cs_release(link);
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if (link->handle) {
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ret = pcmcia_deregister_client(link->handle);
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if (ret != CS_SUCCESS)
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cs_error(link->handle, DeregisterClient, ret);
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}
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/* Unlink, free device structure */
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*linkp = link->next;
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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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void parport_config(dev_link_t *link)
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{
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client_handle_t handle = link->handle;
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parport_info_t *info = link->priv;
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tuple_t tuple;
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u_short buf[128];
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cisparse_t parse;
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config_info_t conf;
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cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
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cistpl_cftable_entry_t dflt = { 0 };
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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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tuple.TupleData = (cisdata_t *)buf;
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tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
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tuple.Attributes = 0;
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tuple.DesiredTuple = CISTPL_CONFIG;
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CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
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CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
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CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
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link->conf.ConfigBase = parse.config.base;
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link->conf.Present = parse.config.rmask[0];
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/* Configure card */
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link->state |= DEV_CONFIG;
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/* Not sure if this is right... look up the current Vcc */
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CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
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tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
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tuple.Attributes = 0;
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CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
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while (1) {
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if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
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pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
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goto next_entry;
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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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link->conf.ConfigIndex = cfg->index;
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if (epp_mode)
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link->conf.ConfigIndex |= FORCE_EPP_MODE;
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link->io.BasePort1 = io->win[0].base;
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link->io.NumPorts1 = io->win[0].len;
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link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
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if (io->nwin == 2) {
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link->io.BasePort2 = io->win[1].base;
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link->io.NumPorts2 = io->win[1].len;
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}
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if (pcmcia_request_io(link->handle, &link->io) != 0)
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goto next_entry;
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/* If we've got this far, we're done */
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break;
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}
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next_entry:
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if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
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CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
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}
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CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
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CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
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release_region(link->io.BasePort1, link->io.NumPorts1);
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if (link->io.NumPorts2)
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release_region(link->io.BasePort2, link->io.NumPorts2);
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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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NULL);
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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 = &info->node;
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link->state &= ~DEV_CONFIG_PENDING;
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return;
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cs_failed:
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cs_error(link->handle, last_fn, last_ret);
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failed:
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parport_cs_release(link);
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link->state &= ~DEV_CONFIG_PENDING;
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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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void parport_cs_release(dev_link_t *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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request_region(link->io.BasePort1, link->io.NumPorts1,
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info->node.dev_name);
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if (link->io.NumPorts2)
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request_region(link->io.BasePort2, link->io.NumPorts2,
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info->node.dev_name);
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}
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info->ndev = 0;
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link->dev = NULL;
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pcmcia_release_configuration(link->handle);
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pcmcia_release_io(link->handle, &link->io);
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pcmcia_release_irq(link->handle, &link->irq);
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link->state &= ~DEV_CONFIG;
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} /* parport_cs_release */
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/*======================================================================
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The card status event handler. Mostly, this schedules other
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stuff to run after an event is received.
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======================================================================*/
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int parport_event(event_t event, int priority,
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event_callback_args_t *args)
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{
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dev_link_t *link = args->client_data;
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DEBUG(1, "parport_event(0x%06x)\n", event);
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switch (event) {
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case CS_EVENT_CARD_REMOVAL:
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link->state &= ~DEV_PRESENT;
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if (link->state & DEV_CONFIG)
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parport_cs_release(link);
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break;
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case CS_EVENT_CARD_INSERTION:
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link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
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parport_config(link);
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break;
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case CS_EVENT_PM_SUSPEND:
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link->state |= DEV_SUSPEND;
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/* Fall through... */
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case CS_EVENT_RESET_PHYSICAL:
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if (link->state & DEV_CONFIG)
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|
|
pcmcia_release_configuration(link->handle);
|
||
|
|
break;
|
||
|
|
case CS_EVENT_PM_RESUME:
|
||
|
|
link->state &= ~DEV_SUSPEND;
|
||
|
|
/* Fall through... */
|
||
|
|
case CS_EVENT_CARD_RESET:
|
||
|
|
if (DEV_OK(link))
|
||
|
|
pcmcia_request_configuration(link->handle, &link->conf);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
} /* parport_event */
|
||
|
|
|
||
|
|
static struct pcmcia_driver parport_cs_driver = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.drv = {
|
||
|
|
.name = "parport_cs",
|
||
|
|
},
|
||
|
|
.attach = parport_attach,
|
||
|
|
.detach = parport_detach,
|
||
|
|
};
|
||
|
|
|
||
|
|
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);
|
||
|
|
BUG_ON(dev_list != NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(init_parport_cs);
|
||
|
|
module_exit(exit_parport_cs);
|