1 files changed, 397 insertions, 0 deletions

diff --git a/drivers/parport/parport_cs.c b/drivers/parport/parport_cs.c
new file mode 100644
index 000000000000..a3fa8185af2a
--- /dev/null
+++ b/drivers/parport/parport_cs.c
@@ -0,0 +1,397 @@
+/*======================================================================
+
+    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/sched.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/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_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 {
+    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(dev_link_t *);
+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;
+
+/*======================================================================
+
+    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 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->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_LEVEL_ID;
+    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.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 = pcmcia_register_client(&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;
+
+    if (link->state & DEV_CONFIG)
+        parport_cs_release(link);
+    
+    if (link->handle) {
+        ret = pcmcia_deregister_client(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, ret) \
+do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
+
+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 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, pcmcia_get_first_tuple(handle, &tuple));
+    CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+    CS_CHECK(ParseTuple, pcmcia_parse_tuple(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, pcmcia_get_configuration_info(handle, &conf));
+    
+    tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+    tuple.Attributes = 0;
+    CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+    while (1) {
+        if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
+                pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
+            goto next_entry;
+
+        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;
+            }
+            if (pcmcia_request_io(link->handle, &link->io) != 0)
+                goto next_entry;
+            /* If we've got this far, we're done */
+            break;
+        }
+        
+    next_entry:
+        if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
+        CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
+    }
+    
+    CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
+    CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
+
+    release_region(link->io.BasePort1, link->io.NumPorts1);
+    if (link->io.NumPorts2)
+        release_region(link->io.BasePort2, link->io.NumPorts2);
+    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 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 = &info->node;
+
+    link->state &= ~DEV_CONFIG_PENDING;
+    return;
+    
+cs_failed:
+    cs_error(link->handle, last_fn, last_ret);
+failed:
+    parport_cs_release(link);
+    link->state &= ~DEV_CONFIG_PENDING;
+
+} /* 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(dev_link_t *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);
+        request_region(link->io.BasePort1, link->io.NumPorts1,
+                       info->node.dev_name);
+        if (link->io.NumPorts2)
+            request_region(link->io.BasePort2, link->io.NumPorts2,
+                           info->node.dev_name);
+    }
+    info->ndev = 0;
+    link->dev = NULL;
+    
+    pcmcia_release_configuration(link->handle);
+    pcmcia_release_io(link->handle, &link->io);
+    pcmcia_release_irq(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)
+                parport_cs_release(link);
+        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)
+            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);