372 lines
12 KiB
C
372 lines
12 KiB
C
/*======================================================================
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An elsa_cs PCMCIA client driver
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This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink
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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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Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
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Lichtenwalder <Lichtenwalder@ACM.org>. 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/module.h>
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#include <linux/kernel.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 <asm/io.h>
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#include <asm/system.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/cisreg.h>
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#include <pcmcia/ds.h>
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#include "hisax_cfg.h"
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MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
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MODULE_AUTHOR("Klaus Lichtenwalder");
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MODULE_LICENSE("Dual MPL/GPL");
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/*
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All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
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you do not define PCMCIA_DEBUG at all, all the debug code will be
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left out. If you compile with PCMCIA_DEBUG=0, the debug code will
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be present but disabled -- but it can then be enabled for specific
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modules at load time with a 'pc_debug=#' option to insmod.
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*/
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#ifdef PCMCIA_DEBUG
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static int pc_debug = PCMCIA_DEBUG;
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module_param(pc_debug, int, 0);
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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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"elsa_cs.c $Revision: 1.2.2.4 $ $Date: 2004/01/25 15:07:06 $ (K.Lichtenwalder)";
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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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/* Parameters that can be set with 'insmod' */
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static int protocol = 2; /* EURO-ISDN Default */
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module_param(protocol, int, 0);
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/*====================================================================*/
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/*
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The event() function is this driver's Card Services event handler.
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It will be called by Card Services when an appropriate card status
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event is received. The config() and release() entry points are
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used to configure or release a socket, in response to card insertion
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and ejection events. They are invoked from the elsa_cs event
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handler.
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*/
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static int elsa_cs_config(struct pcmcia_device *link);
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static void elsa_cs_release(struct pcmcia_device *link);
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/*
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The attach() and detach() entry points are used to create and destroy
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"instances" of the driver, where each instance represents everything
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needed to manage one actual PCMCIA card.
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*/
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static void elsa_cs_detach(struct pcmcia_device *p_dev);
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/*
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A driver needs to provide a dev_node_t structure for each device
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on a card. In some cases, there is only one device per card (for
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example, ethernet cards, modems). In other cases, there may be
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many actual or logical devices (SCSI adapters, memory cards with
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multiple partitions). The dev_node_t structures need to be kept
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in a linked list starting at the 'dev' field of a struct pcmcia_device
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structure. We allocate them in the card's private data structure,
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because they generally shouldn't be allocated dynamically.
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In this case, we also provide a flag to indicate if a device is
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"stopped" due to a power management event, or card ejection. The
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device IO routines can use a flag like this to throttle IO to a
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card that is not ready to accept it.
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*/
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typedef struct local_info_t {
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struct pcmcia_device *p_dev;
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dev_node_t node;
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int busy;
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int cardnr;
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} local_info_t;
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/*======================================================================
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elsa_cs_attach() creates an "instance" of the driver, allocatingx
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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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The dev_link structure is initialized, but we don't actually
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configure the card at this point -- we wait until we receive a
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card insertion event.
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======================================================================*/
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static int elsa_cs_probe(struct pcmcia_device *link)
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{
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local_info_t *local;
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DEBUG(0, "elsa_cs_attach()\n");
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/* Allocate space for private device-specific data */
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local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
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if (!local) return -ENOMEM;
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local->p_dev = link;
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link->priv = local;
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local->cardnr = -1;
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/* Interrupt setup */
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link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
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link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
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link->irq.Handler = NULL;
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/*
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General socket configuration defaults can go here. In this
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client, we assume very little, and rely on the CIS for almost
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everything. In most clients, many details (i.e., number, sizes,
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and attributes of IO windows) are fixed by the nature of the
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device, and can be hard-wired here.
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*/
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link->io.NumPorts1 = 8;
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link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
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link->io.IOAddrLines = 3;
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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 elsa_cs_config(link);
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} /* elsa_cs_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 elsa_cs_detach(struct pcmcia_device *link)
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{
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local_info_t *info = link->priv;
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DEBUG(0, "elsa_cs_detach(0x%p)\n", link);
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info->busy = 1;
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elsa_cs_release(link);
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kfree(info);
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} /* elsa_cs_detach */
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/*======================================================================
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elsa_cs_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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device available to the system.
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======================================================================*/
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static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
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cistpl_cftable_entry_t *cf,
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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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int j;
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if ((cf->io.nwin > 0) && cf->io.win[0].base) {
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printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
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p_dev->io.BasePort1 = cf->io.win[0].base;
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if (!pcmcia_request_io(p_dev, &p_dev->io))
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return 0;
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} else {
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printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
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for (j = 0x2f0; j > 0x100; j -= 0x10) {
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p_dev->io.BasePort1 = j;
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if (!pcmcia_request_io(p_dev, &p_dev->io))
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return 0;
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}
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}
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return -ENODEV;
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}
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static int elsa_cs_config(struct pcmcia_device *link)
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{
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local_info_t *dev;
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int i, last_fn;
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IsdnCard_t icard;
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DEBUG(0, "elsa_config(0x%p)\n", link);
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dev = link->priv;
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i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
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if (i != 0) {
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last_fn = RequestIO;
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goto cs_failed;
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}
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i = pcmcia_request_irq(link, &link->irq);
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if (i != 0) {
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link->irq.AssignedIRQ = 0;
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last_fn = RequestIRQ;
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goto cs_failed;
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}
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i = pcmcia_request_configuration(link, &link->conf);
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if (i != 0) {
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last_fn = RequestConfiguration;
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goto cs_failed;
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}
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/* At this point, the dev_node_t structure(s) should be
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initialized and arranged in a linked list at link->dev. *//* */
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sprintf(dev->node.dev_name, "elsa");
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dev->node.major = dev->node.minor = 0x0;
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link->dev_node = &dev->node;
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/* Finally, report what we've done */
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printk(KERN_INFO "%s: index 0x%02x: ",
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dev->node.dev_name, link->conf.ConfigIndex);
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if (link->conf.Attributes & CONF_ENABLE_IRQ)
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printk(", irq %d", link->irq.AssignedIRQ);
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if (link->io.NumPorts1)
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printk(", io 0x%04x-0x%04x", link->io.BasePort1,
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link->io.BasePort1+link->io.NumPorts1-1);
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if (link->io.NumPorts2)
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printk(" & 0x%04x-0x%04x", link->io.BasePort2,
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link->io.BasePort2+link->io.NumPorts2-1);
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printk("\n");
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icard.para[0] = link->irq.AssignedIRQ;
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icard.para[1] = link->io.BasePort1;
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icard.protocol = protocol;
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icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
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i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
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if (i < 0) {
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printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
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i, link->io.BasePort1);
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elsa_cs_release(link);
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} else
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((local_info_t*)link->priv)->cardnr = i;
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return 0;
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cs_failed:
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cs_error(link, last_fn, i);
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elsa_cs_release(link);
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return -ENODEV;
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} /* elsa_cs_config */
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/*======================================================================
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After a card is removed, elsa_cs_release() will unregister the net
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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 elsa_cs_release(struct pcmcia_device *link)
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{
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local_info_t *local = link->priv;
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DEBUG(0, "elsa_cs_release(0x%p)\n", link);
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if (local) {
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if (local->cardnr >= 0) {
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/* no unregister function with hisax */
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HiSax_closecard(local->cardnr);
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}
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}
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pcmcia_disable_device(link);
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} /* elsa_cs_release */
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static int elsa_suspend(struct pcmcia_device *link)
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{
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local_info_t *dev = link->priv;
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dev->busy = 1;
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return 0;
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}
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static int elsa_resume(struct pcmcia_device *link)
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{
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local_info_t *dev = link->priv;
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dev->busy = 0;
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return 0;
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}
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static struct pcmcia_device_id elsa_ids[] = {
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PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
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PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
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PCMCIA_DEVICE_NULL
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};
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MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
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static struct pcmcia_driver elsa_cs_driver = {
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.owner = THIS_MODULE,
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.drv = {
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.name = "elsa_cs",
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},
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.probe = elsa_cs_probe,
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.remove = elsa_cs_detach,
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.id_table = elsa_ids,
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.suspend = elsa_suspend,
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.resume = elsa_resume,
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};
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static int __init init_elsa_cs(void)
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{
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return pcmcia_register_driver(&elsa_cs_driver);
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}
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static void __exit exit_elsa_cs(void)
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{
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pcmcia_unregister_driver(&elsa_cs_driver);
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}
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module_init(init_elsa_cs);
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module_exit(exit_elsa_cs);
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