303 lines
8.6 KiB
C
303 lines
8.6 KiB
C
/*
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* PCMCIA client driver for AVM A1 / Fritz!PCMCIA
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*
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* Author Carsten Paeth
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* Copyright 1998-2001 by Carsten Paeth <calle@calle.in-berlin.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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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 <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/ds.h>
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#include "hisax_cfg.h"
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MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
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MODULE_AUTHOR("Carsten Paeth");
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MODULE_LICENSE("GPL");
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/*====================================================================*/
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/* Parameters that can be set with 'insmod' */
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static int isdnprot = 2;
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module_param(isdnprot, 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 skeleton event
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handler.
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*/
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static int avma1cs_config(struct pcmcia_device *link) __devinit ;
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static void avma1cs_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 avma1cs_detach(struct pcmcia_device *p_dev) __devexit ;
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/*
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A linked list of "instances" of the skeleton device. Each actual
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PCMCIA card corresponds to one device instance, and is described
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by one struct pcmcia_device structure (defined in ds.h).
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You may not want to use a linked list for this -- for example, the
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memory card driver uses an array of struct pcmcia_device pointers, where minor
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device numbers are used to derive the corresponding array index.
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*/
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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 can't be allocated dynamically.
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*/
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typedef struct local_info_t {
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dev_node_t node;
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} local_info_t;
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/*======================================================================
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avma1cs_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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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 __devinit avma1cs_probe(struct pcmcia_device *p_dev)
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{
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local_info_t *local;
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dev_dbg(&p_dev->dev, "avma1cs_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)
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return -ENOMEM;
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p_dev->priv = local;
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/* The io structure describes IO port mapping */
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p_dev->io.NumPorts1 = 16;
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p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
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p_dev->io.NumPorts2 = 16;
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p_dev->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
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p_dev->io.IOAddrLines = 5;
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/* Interrupt setup */
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p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
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/* General socket configuration */
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p_dev->conf.Attributes = CONF_ENABLE_IRQ;
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p_dev->conf.IntType = INT_MEMORY_AND_IO;
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p_dev->conf.ConfigIndex = 1;
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p_dev->conf.Present = PRESENT_OPTION;
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return avma1cs_config(p_dev);
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} /* avma1cs_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 __devexit avma1cs_detach(struct pcmcia_device *link)
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{
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dev_dbg(&link->dev, "avma1cs_detach(0x%p)\n", link);
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avma1cs_release(link);
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kfree(link->priv);
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} /* avma1cs_detach */
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/*======================================================================
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avma1cs_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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ethernet device available to the system.
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======================================================================*/
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static int avma1cs_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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if (cf->io.nwin <= 0)
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return -ENODEV;
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p_dev->io.BasePort1 = cf->io.win[0].base;
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p_dev->io.NumPorts1 = cf->io.win[0].len;
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p_dev->io.NumPorts2 = 0;
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printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
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p_dev->io.BasePort1,
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p_dev->io.BasePort1+p_dev->io.NumPorts1-1);
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return pcmcia_request_io(p_dev, &p_dev->io);
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}
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static int __devinit avma1cs_config(struct pcmcia_device *link)
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{
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local_info_t *dev;
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int i;
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char devname[128];
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IsdnCard_t icard;
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int busy = 0;
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dev = link->priv;
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dev_dbg(&link->dev, "avma1cs_config(0x%p)\n", link);
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devname[0] = 0;
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if (link->prod_id[1])
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strlcpy(devname, link->prod_id[1], sizeof(devname));
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if (pcmcia_loop_config(link, avma1cs_configcheck, NULL))
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return -ENODEV;
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do {
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/*
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* allocate an interrupt line
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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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/* undo */
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pcmcia_disable_device(link);
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break;
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}
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/*
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* configure the PCMCIA socket
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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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pcmcia_disable_device(link);
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break;
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}
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} while (0);
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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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strcpy(dev->node.dev_name, "A1");
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dev->node.major = 45;
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dev->node.minor = 0;
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link->dev_node = &dev->node;
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/* If any step failed, release any partially configured state */
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if (i != 0) {
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avma1cs_release(link);
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return -ENODEV;
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}
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printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
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link->io.BasePort1, link->irq.AssignedIRQ);
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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 = isdnprot;
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icard.typ = ISDN_CTYPE_A1_PCMCIA;
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i = hisax_init_pcmcia(link, &busy, &icard);
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if (i < 0) {
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printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
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avma1cs_release(link);
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return -ENODEV;
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}
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dev->node.minor = i;
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return 0;
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} /* avma1cs_config */
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/*======================================================================
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After a card is removed, avma1cs_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 avma1cs_release(struct pcmcia_device *link)
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{
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local_info_t *local = link->priv;
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dev_dbg(&link->dev, "avma1cs_release(0x%p)\n", link);
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/* now unregister function with hisax */
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HiSax_closecard(local->node.minor);
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pcmcia_disable_device(link);
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} /* avma1cs_release */
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static struct pcmcia_device_id avma1cs_ids[] = {
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PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
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PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
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PCMCIA_DEVICE_NULL
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};
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MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
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static struct pcmcia_driver avma1cs_driver = {
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.owner = THIS_MODULE,
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.drv = {
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.name = "avma1_cs",
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},
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.probe = avma1cs_probe,
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.remove = __devexit_p(avma1cs_detach),
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.id_table = avma1cs_ids,
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};
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/*====================================================================*/
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static int __init init_avma1_cs(void)
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{
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return(pcmcia_register_driver(&avma1cs_driver));
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}
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static void __exit exit_avma1_cs(void)
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{
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pcmcia_unregister_driver(&avma1cs_driver);
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}
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module_init(init_avma1_cs);
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module_exit(exit_avma1_cs);
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