parport_cs.c
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上传日期:2013-02-24
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- /*======================================================================
- 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 1.24 2001/10/13 14:04:05
- 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/version.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 <linux/parport.h>
- #include <linux/parport_pc.h>
- #include <pcmcia/version.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_PARM(n, "i")
- /* Bit map of interrupts to choose from */
- INT_MODULE_PARM(irq_mask, 0xdeb8);
- static int irq_list[4] = { -1 };
- MODULE_PARM(irq_list, "1-4i");
- 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 1.24 2001/10/13 14:04:05 (David Hinds)";
- #else
- #define DEBUG(n, args...)
- #endif
- /*====================================================================*/
- #define FORCE_EPP_MODE 0x08
- typedef struct parport_info_t {
- dev_link_t link;
- int ndev;
- dev_node_t node;
- struct parport *port;
- } parport_info_t;
- static dev_link_t *parport_attach(void);
- static void parport_detach(dev_link_t *);
- static void parport_config(dev_link_t *link);
- static void parport_cs_release(u_long arg);
- static int parport_event(event_t event, int priority,
- event_callback_args_t *args);
- static dev_info_t dev_info = "parport_cs";
- static dev_link_t *dev_list = NULL;
- /*====================================================================*/
- static void cs_error(client_handle_t handle, int func, int ret)
- {
- error_info_t err = { func, ret };
- CardServices(ReportError, handle, &err);
- }
- /*======================================================================
- parport_attach() creates an "instance" of the driver, allocating
- local data structures for one device. The device is registered
- with Card Services.
- ======================================================================*/
- static dev_link_t *parport_attach(void)
- {
- parport_info_t *info;
- dev_link_t *link;
- client_reg_t client_reg;
- int i, ret;
-
- DEBUG(0, "parport_attach()n");
- /* Create new parport device */
- info = kmalloc(sizeof(*info), GFP_KERNEL);
- if (!info) return NULL;
- memset(info, 0, sizeof(*info));
- link = &info->link; link->priv = info;
- link->release.function = &parport_cs_release;
- link->release.data = (u_long)link;
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
- link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
- link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
- link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
- if (irq_list[0] == -1)
- link->irq.IRQInfo2 = irq_mask;
- else
- for (i = 0; i < 4; i++)
- link->irq.IRQInfo2 |= 1 << irq_list[i];
- 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.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
- 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 = &parport_event;
- client_reg.Version = 0x0210;
- client_reg.event_callback_args.client_data = link;
- ret = CardServices(RegisterClient, &link->handle, &client_reg);
- if (ret != CS_SUCCESS) {
- cs_error(link->handle, RegisterClient, ret);
- parport_detach(link);
- return NULL;
- }
-
- return 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(dev_link_t *link)
- {
- dev_link_t **linkp;
- int ret;
- DEBUG(0, "parport_detach(0x%p)n", link);
-
- /* Locate device structure */
- for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
- if (*linkp == link) break;
- if (*linkp == NULL)
- return;
- del_timer(&link->release);
- if (link->state & DEV_CONFIG)
- parport_cs_release((u_long)link);
-
- if (link->handle) {
- ret = CardServices(DeregisterClient, link->handle);
- if (ret != CS_SUCCESS)
- cs_error(link->handle, DeregisterClient, ret);
- }
-
- /* Unlink, free device structure */
- *linkp = link->next;
- 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, args...)
- while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed
- #define CFG_CHECK(fn, args...)
- if (CardServices(fn, args) != 0) goto next_entry
- static struct { u_int flag; char *name; } mode[] = {
- { PARPORT_MODE_TRISTATE, "PS2" },
- { PARPORT_MODE_EPP, "EPP" },
- { PARPORT_MODE_ECP, "ECP" },
- };
- void parport_config(dev_link_t *link)
- {
- client_handle_t handle = link->handle;
- parport_info_t *info = link->priv;
- tuple_t tuple;
- u_short buf[128];
- cisparse_t parse;
- config_info_t conf;
- cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
- cistpl_cftable_entry_t dflt = { 0 };
- struct parport *p;
- int i, last_ret, last_fn;
-
- DEBUG(0, "parport_config(0x%p)n", link);
-
- tuple.TupleData = (cisdata_t *)buf;
- tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
- tuple.Attributes = 0;
- tuple.DesiredTuple = CISTPL_CONFIG;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- CS_CHECK(GetTupleData, handle, &tuple);
- CS_CHECK(ParseTuple, handle, &tuple, &parse);
- link->conf.ConfigBase = parse.config.base;
- link->conf.Present = parse.config.rmask[0];
-
- /* Configure card */
- link->state |= DEV_CONFIG;
- /* Not sure if this is right... look up the current Vcc */
- CS_CHECK(GetConfigurationInfo, handle, &conf);
-
- tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
- tuple.Attributes = 0;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- while (1) {
- CFG_CHECK(GetTupleData, handle, &tuple);
- CFG_CHECK(ParseTuple, handle, &tuple, &parse);
- if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
- cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
- link->conf.ConfigIndex = cfg->index;
- if (epp_mode)
- link->conf.ConfigIndex |= FORCE_EPP_MODE;
- link->io.BasePort1 = io->win[0].base;
- link->io.NumPorts1 = io->win[0].len;
- link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
- if (io->nwin == 2) {
- link->io.BasePort2 = io->win[1].base;
- link->io.NumPorts2 = io->win[1].len;
- }
- CFG_CHECK(RequestIO, link->handle, &link->io);
- /* If we've got this far, we're done */
- break;
- }
-
- next_entry:
- if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
- CS_CHECK(GetNextTuple, handle, &tuple);
- }
-
- CS_CHECK(RequestIRQ, handle, &link->irq);
- CS_CHECK(RequestConfiguration, handle, &link->conf);
- p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
- link->irq.AssignedIRQ, PARPORT_DMA_NONE,
- NULL);
- if (p == NULL) {
- printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
- "0x%3x, irq %u failedn", 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 = &info->node;
- printk(KERN_INFO "%s: PC-style PCMCIA at %#x", p->name,
- link->io.BasePort1);
- if (link->io.NumPorts2)
- printk(" & %#x", link->io.BasePort2);
- printk(", irq %u [SPP", link->irq.AssignedIRQ);
- for (i = 0; i < 5; i++)
- if (p->modes & mode[i].flag) printk(",%s", mode[i].name);
- printk("]n");
-
- link->state &= ~DEV_CONFIG_PENDING;
- return;
-
- cs_failed:
- cs_error(link->handle, last_fn, last_ret);
- failed:
- parport_cs_release((u_long)link);
- } /* 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.
-
- ======================================================================*/
- void parport_cs_release(u_long arg)
- {
- dev_link_t *link = (dev_link_t *)arg;
- parport_info_t *info = link->priv;
-
- DEBUG(0, "parport_release(0x%p)n", link);
- if (info->ndev) {
- struct parport *p = info->port;
- parport_proc_unregister(p);
- kfree(p->private_data);
- parport_unregister_port(p);
- }
- info->ndev = 0;
- link->dev = NULL;
-
- CardServices(ReleaseConfiguration, link->handle);
- CardServices(ReleaseIO, link->handle, &link->io);
- CardServices(ReleaseIRQ, link->handle, &link->irq);
-
- link->state &= ~DEV_CONFIG;
- } /* parport_cs_release */
- /*======================================================================
- The card status event handler. Mostly, this schedules other
- stuff to run after an event is received.
-
- ======================================================================*/
- int parport_event(event_t event, int priority,
- event_callback_args_t *args)
- {
- dev_link_t *link = args->client_data;
- DEBUG(1, "parport_event(0x%06x)n", event);
-
- switch (event) {
- case CS_EVENT_CARD_REMOVAL:
- link->state &= ~DEV_PRESENT;
- if (link->state & DEV_CONFIG)
- mod_timer(&link->release, jiffies + HZ/20);
- break;
- case CS_EVENT_CARD_INSERTION:
- link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
- parport_config(link);
- break;
- case CS_EVENT_PM_SUSPEND:
- link->state |= DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_RESET_PHYSICAL:
- if (link->state & DEV_CONFIG)
- CardServices(ReleaseConfiguration, link->handle);
- break;
- case CS_EVENT_PM_RESUME:
- link->state &= ~DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_CARD_RESET:
- if (DEV_OK(link))
- CardServices(RequestConfiguration, link->handle, &link->conf);
- break;
- }
- return 0;
- } /* parport_event */
- /*====================================================================*/
- static int __init init_parport_cs(void)
- {
- servinfo_t serv;
- DEBUG(0, "%sn", version);
- CardServices(GetCardServicesInfo, &serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "parport_cs: Card Services release "
- "does not match!n");
- return -1;
- }
- register_pccard_driver(&dev_info, &parport_attach, &parport_detach);
- return 0;
- }
- static void __exit exit_parport_cs(void)
- {
- DEBUG(0, "parport_cs: unloadingn");
- unregister_pccard_driver(&dev_info);
- while (dev_list != NULL)
- parport_detach(dev_list);
- }
- module_init(init_parport_cs);
- module_exit(exit_parport_cs);