avm_cs.c
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- /* $Id: avm_cs.c,v 1.1.4.1 2001/11/20 14:19:34 kai Exp $
- *
- * A PCMCIA client driver for AVM B1/M1/M2
- *
- * Copyright 1999 by Carsten Paeth <calle@calle.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
- #include <linux/module.h>
- #include <linux/kernel.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/tty.h>
- #include <linux/serial.h>
- #include <linux/major.h>
- #include <asm/io.h>
- #include <asm/system.h>
- #include <pcmcia/version.h>
- #include <pcmcia/cs_types.h>
- #include <pcmcia/cs.h>
- #include <pcmcia/cistpl.h>
- #include <pcmcia/ciscode.h>
- #include <pcmcia/ds.h>
- #include <pcmcia/cisreg.h>
- #include <linux/skbuff.h>
- #include <linux/capi.h>
- #include <linux/b1lli.h>
- #include <linux/b1pcmcia.h>
- /*====================================================================*/
- MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
- MODULE_AUTHOR("Carsten Paeth");
- MODULE_LICENSE("GPL");
- /*====================================================================*/
- /* Parameters that can be set with 'insmod' */
- /* This means pick from 15, 12, 11, 10, 9, 7, 5, 4, and 3 */
- static int default_irq_list[10] = { 15, 12, 11, 10, 9, 7, 5, 4, 3, -1 };
- static int irq_list[10] = { -1 };
- MODULE_PARM(irq_list, "1-10i");
- /*====================================================================*/
- /*
- The event() function is this driver's Card Services event handler.
- It will be called by Card Services when an appropriate card status
- event is received. The config() and release() entry points are
- used to configure or release a socket, in response to card insertion
- and ejection events. They are invoked from the skeleton event
- handler.
- */
- static void avmcs_config(dev_link_t *link);
- static void avmcs_release(u_long arg);
- static int avmcs_event(event_t event, int priority,
- event_callback_args_t *args);
- /*
- The attach() and detach() entry points are used to create and destroy
- "instances" of the driver, where each instance represents everything
- needed to manage one actual PCMCIA card.
- */
- static dev_link_t *avmcs_attach(void);
- static void avmcs_detach(dev_link_t *);
- /*
- The dev_info variable is the "key" that is used to match up this
- device driver with appropriate cards, through the card configuration
- database.
- */
- static dev_info_t dev_info = "avm_cs";
- /*
- A linked list of "instances" of the skeleton device. Each actual
- PCMCIA card corresponds to one device instance, and is described
- by one dev_link_t structure (defined in ds.h).
- You may not want to use a linked list for this -- for example, the
- memory card driver uses an array of dev_link_t pointers, where minor
- device numbers are used to derive the corresponding array index.
- */
- static dev_link_t *dev_list = NULL;
- /*
- A dev_link_t structure has fields for most things that are needed
- to keep track of a socket, but there will usually be some device
- specific information that also needs to be kept track of. The
- 'priv' pointer in a dev_link_t structure can be used to point to
- a device-specific private data structure, like this.
- A driver needs to provide a dev_node_t structure for each device
- on a card. In some cases, there is only one device per card (for
- example, ethernet cards, modems). In other cases, there may be
- many actual or logical devices (SCSI adapters, memory cards with
- multiple partitions). The dev_node_t structures need to be kept
- in a linked list starting at the 'dev' field of a dev_link_t
- structure. We allocate them in the card's private data structure,
- because they generally can't be allocated dynamically.
- */
-
- typedef struct local_info_t {
- dev_node_t node;
- } local_info_t;
- /*====================================================================*/
- static void cs_error(client_handle_t handle, int func, int ret)
- {
- error_info_t err = { func, ret };
- CardServices(ReportError, handle, &err);
- }
- /*======================================================================
- avmcs_attach() creates an "instance" of the driver, allocating
- local data structures for one device. The device is registered
- with Card Services.
- The dev_link structure is initialized, but we don't actually
- configure the card at this point -- we wait until we receive a
- card insertion event.
-
- ======================================================================*/
- static dev_link_t *avmcs_attach(void)
- {
- client_reg_t client_reg;
- dev_link_t *link;
- local_info_t *local;
- int ret, i;
-
- /* Initialize the dev_link_t structure */
- link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
- if (!link)
- return NULL;
- memset(link, 0, sizeof(struct dev_link_t));
- link->release.function = &avmcs_release;
- link->release.data = (u_long)link;
- /* The io structure describes IO port mapping */
- link->io.NumPorts1 = 16;
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
- link->io.NumPorts2 = 0;
- /* Interrupt setup */
- link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
- link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
- link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
- if (irq_list[0] != -1) {
- for (i = 0; i < 10 && irq_list[i] > 0; i++)
- link->irq.IRQInfo2 |= 1 << irq_list[i];
- } else {
- for (i = 0; i < 10 && default_irq_list[i] > 0; i++)
- link->irq.IRQInfo2 |= 1 << default_irq_list[i];
- }
-
- /* General socket configuration */
- link->conf.Attributes = CONF_ENABLE_IRQ;
- link->conf.Vcc = 50;
- link->conf.IntType = INT_MEMORY_AND_IO;
- link->conf.ConfigIndex = 1;
- link->conf.Present = PRESENT_OPTION;
- /* Allocate space for private device-specific data */
- local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
- if (!local)
- return NULL;
- memset(local, 0, sizeof(local_info_t));
- link->priv = local;
-
- /* 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 = &avmcs_event;
- client_reg.Version = 0x0210;
- client_reg.event_callback_args.client_data = link;
- ret = CardServices(RegisterClient, &link->handle, &client_reg);
- if (ret != 0) {
- cs_error(link->handle, RegisterClient, ret);
- avmcs_detach(link);
- return NULL;
- }
- return link;
- } /* avmcs_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 avmcs_detach(dev_link_t *link)
- {
- dev_link_t **linkp;
- /* Locate device structure */
- for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
- if (*linkp == link) break;
- if (*linkp == NULL)
- return;
- /*
- If the device is currently configured and active, we won't
- actually delete it yet. Instead, it is marked so that when
- the release() function is called, that will trigger a proper
- detach().
- */
- if (link->state & DEV_CONFIG) {
- link->state |= DEV_STALE_LINK;
- return;
- }
- /* Break the link with Card Services */
- if (link->handle)
- CardServices(DeregisterClient, link->handle);
-
- /* Unlink device structure, free pieces */
- *linkp = link->next;
- if (link->priv) {
- kfree(link->priv);
- }
- kfree(link);
-
- } /* avmcs_detach */
- /*======================================================================
- avmcs_config() is scheduled to run after a CARD_INSERTION event
- is received, to configure the PCMCIA socket, and to make the
- ethernet device available to the system.
-
- ======================================================================*/
- static int get_tuple(int fn, client_handle_t handle, tuple_t *tuple,
- cisparse_t *parse)
- {
- int i;
- i = CardServices(fn, handle, tuple);
- if (i != CS_SUCCESS) return i;
- i = CardServices(GetTupleData, handle, tuple);
- if (i != CS_SUCCESS) return i;
- return CardServices(ParseTuple, handle, tuple, parse);
- }
- #define first_tuple(a, b, c) get_tuple(GetFirstTuple, a, b, c)
- #define next_tuple(a, b, c) get_tuple(GetNextTuple, a, b, c)
- static void avmcs_config(dev_link_t *link)
- {
- client_handle_t handle;
- tuple_t tuple;
- cisparse_t parse;
- cistpl_cftable_entry_t *cf = &parse.cftable_entry;
- local_info_t *dev;
- int i;
- u_char buf[64];
- char devname[128];
- int cardtype;
- int (*addcard)(unsigned int port, unsigned irq);
-
- handle = link->handle;
- dev = link->priv;
- /*
- This reads the card's CONFIG tuple to find its configuration
- registers.
- */
- do {
- tuple.DesiredTuple = CISTPL_CONFIG;
- i = CardServices(GetFirstTuple, handle, &tuple);
- if (i != CS_SUCCESS) break;
- tuple.TupleData = buf;
- tuple.TupleDataMax = 64;
- tuple.TupleOffset = 0;
- i = CardServices(GetTupleData, handle, &tuple);
- if (i != CS_SUCCESS) break;
- i = CardServices(ParseTuple, handle, &tuple, &parse);
- if (i != CS_SUCCESS) break;
- link->conf.ConfigBase = parse.config.base;
- } while (0);
- if (i != CS_SUCCESS) {
- cs_error(link->handle, ParseTuple, i);
- link->state &= ~DEV_CONFIG_PENDING;
- return;
- }
-
- /* Configure card */
- link->state |= DEV_CONFIG;
- do {
- tuple.Attributes = 0;
- tuple.TupleData = buf;
- tuple.TupleDataMax = 254;
- tuple.TupleOffset = 0;
- tuple.DesiredTuple = CISTPL_VERS_1;
- devname[0] = 0;
- if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
- strncpy(devname,parse.version_1.str + parse.version_1.ofs[1],
- sizeof(devname));
- }
- /*
- * find IO port
- */
- tuple.TupleData = (cisdata_t *)buf;
- tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
- tuple.Attributes = 0;
- tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
- i = first_tuple(handle, &tuple, &parse);
- while (i == CS_SUCCESS) {
- if (cf->io.nwin > 0) {
- link->conf.ConfigIndex = cf->index;
- link->io.BasePort1 = cf->io.win[0].base;
- link->io.NumPorts1 = cf->io.win[0].len;
- link->io.NumPorts2 = 0;
- printk(KERN_INFO "avm_cs: testing i/o %#x-%#xn",
- link->io.BasePort1,
- link->io.BasePort1+link->io.NumPorts1-1);
- i = CardServices(RequestIO, link->handle, &link->io);
- if (i == CS_SUCCESS) goto found_port;
- }
- i = next_tuple(handle, &tuple, &parse);
- }
- found_port:
- if (i != CS_SUCCESS) {
- cs_error(link->handle, RequestIO, i);
- break;
- }
-
- /*
- * allocate an interrupt line
- */
- i = CardServices(RequestIRQ, link->handle, &link->irq);
- if (i != CS_SUCCESS) {
- cs_error(link->handle, RequestIRQ, i);
- CardServices(ReleaseIO, link->handle, &link->io);
- break;
- }
-
- /*
- * configure the PCMCIA socket
- */
- i = CardServices(RequestConfiguration, link->handle, &link->conf);
- if (i != CS_SUCCESS) {
- cs_error(link->handle, RequestConfiguration, i);
- CardServices(ReleaseIO, link->handle, &link->io);
- CardServices(ReleaseIRQ, link->handle, &link->irq);
- break;
- }
- } while (0);
- /* At this point, the dev_node_t structure(s) should be
- initialized and arranged in a linked list at link->dev. */
- if (devname[0]) {
- char *s = strrchr(devname, ' ');
- if (!s)
- s = devname;
- else s++;
- strcpy(dev->node.dev_name, s);
- if (strcmp("M1", s) == 0) {
- cardtype = AVM_CARDTYPE_M1;
- } else if (strcmp("M2", s) == 0) {
- cardtype = AVM_CARDTYPE_M2;
- } else {
- cardtype = AVM_CARDTYPE_B1;
- }
- } else {
- strcpy(dev->node.dev_name, "b1");
- cardtype = AVM_CARDTYPE_B1;
- }
- dev->node.major = 64;
- dev->node.minor = 0;
- link->dev = &dev->node;
-
- link->state &= ~DEV_CONFIG_PENDING;
- /* If any step failed, release any partially configured state */
- if (i != 0) {
- avmcs_release((u_long)link);
- return;
- }
- switch (cardtype) {
- case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
- case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
- default:
- case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
- }
- if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
- printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %dn",
- dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
- avmcs_release((u_long)link);
- return;
- }
- dev->node.minor = i;
- } /* avmcs_config */
- /*======================================================================
- After a card is removed, avmcs_release() will unregister the net
- device, and release the PCMCIA configuration. If the device is
- still open, this will be postponed until it is closed.
-
- ======================================================================*/
- static void avmcs_release(u_long arg)
- {
- dev_link_t *link = (dev_link_t *)arg;
- /*
- If the device is currently in use, we won't release until it
- is actually closed.
- */
- if (link->open) {
- link->state |= DEV_STALE_CONFIG;
- return;
- }
- b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
- /* Unlink the device chain */
- link->dev = NULL;
-
- /* Don't bother checking to see if these succeed or not */
- CardServices(ReleaseConfiguration, link->handle);
- CardServices(ReleaseIO, link->handle, &link->io);
- CardServices(ReleaseIRQ, link->handle, &link->irq);
- link->state &= ~DEV_CONFIG;
-
- if (link->state & DEV_STALE_LINK)
- avmcs_detach(link);
-
- } /* avmcs_release */
- /*======================================================================
- The card status event handler. Mostly, this schedules other
- stuff to run after an event is received. A CARD_REMOVAL event
- also sets some flags to discourage the net drivers from trying
- to talk to the card any more.
- When a CARD_REMOVAL event is received, we immediately set a flag
- to block future accesses to this device. All the functions that
- actually access the device should check this flag to make sure
- the card is still present.
-
- ======================================================================*/
- static int avmcs_event(event_t event, int priority,
- event_callback_args_t *args)
- {
- dev_link_t *link = args->client_data;
- switch (event) {
- case CS_EVENT_CARD_REMOVAL:
- link->state &= ~DEV_PRESENT;
- if (link->state & DEV_CONFIG) {
- link->release.expires = jiffies + (HZ/20);
- add_timer(&link->release);
- }
- break;
- case CS_EVENT_CARD_INSERTION:
- link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
- avmcs_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 (link->state & DEV_CONFIG)
- CardServices(RequestConfiguration, link->handle, &link->conf);
- break;
- }
- return 0;
- } /* avmcs_event */
- /*====================================================================*/
- static int __init avmcs_init(void)
- {
- servinfo_t serv;
- CardServices(GetCardServicesInfo, &serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "avm_cs: Card Services release "
- "does not match!n");
- return -1;
- }
- register_pccard_driver(&dev_info, &avmcs_attach, &avmcs_detach);
- return 0;
- }
- static void __exit avmcs_exit(void)
- {
- unregister_pccard_driver(&dev_info);
- while (dev_list != NULL) {
- if (dev_list->state & DEV_CONFIG)
- avmcs_release((u_long)dev_list);
- avmcs_detach(dev_list);
- }
- }
- module_init(avmcs_init);
- module_exit(avmcs_exit);