diff options
Diffstat (limited to 'drivers/pcmcia/ds.c')
| -rw-r--r-- | drivers/pcmcia/ds.c | 1659 |
1 files changed, 1659 insertions, 0 deletions
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c new file mode 100644 index 000000000000..66150d08b5c7 --- /dev/null +++ b/drivers/pcmcia/ds.c @@ -0,0 +1,1659 @@ +/* + * ds.c -- 16-bit PCMCIA core support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + * + * (C) 1999 David A. Hinds + * (C) 2003 - 2004 Dominik Brodowski + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/fcntl.h> +#include <linux/sched.h> +#include <linux/smp_lock.h> +#include <linux/timer.h> +#include <linux/ioctl.h> +#include <linux/proc_fs.h> +#include <linux/poll.h> +#include <linux/pci.h> +#include <linux/list.h> +#include <linux/delay.h> +#include <linux/kref.h> +#include <linux/workqueue.h> + +#include <asm/atomic.h> + +#define IN_CARD_SERVICES +#include <pcmcia/version.h> +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/bulkmem.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> +#include <pcmcia/ss.h> + +#include "cs_internal.h" + +/*====================================================================*/ + +/* Module parameters */ + +MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); +MODULE_DESCRIPTION("PCMCIA Driver Services"); +MODULE_LICENSE("GPL"); + +#ifdef DEBUG +int ds_pc_debug; + +module_param_named(pc_debug, ds_pc_debug, int, 0644); + +#define ds_dbg(lvl, fmt, arg...) do { \ + if (ds_pc_debug > (lvl)) \ + printk(KERN_DEBUG "ds: " fmt , ## arg); \ +} while (0) +#else +#define ds_dbg(lvl, fmt, arg...) do { } while (0) +#endif + +/*====================================================================*/ + +/* Device user information */ +#define MAX_EVENTS 32 +#define USER_MAGIC 0x7ea4 +#define CHECK_USER(u) \ + (((u) == NULL) || ((u)->user_magic != USER_MAGIC)) +typedef struct user_info_t { + u_int user_magic; + int event_head, event_tail; + event_t event[MAX_EVENTS]; + struct user_info_t *next; + struct pcmcia_bus_socket *socket; +} user_info_t; + +/* Socket state information */ +struct pcmcia_bus_socket { + struct kref refcount; + struct pcmcia_callback callback; + int state; + user_info_t *user; + wait_queue_head_t queue; + struct pcmcia_socket *parent; + + /* the PCMCIA devices connected to this socket (normally one, more + * for multifunction devices: */ + struct list_head devices_list; + u8 device_count; /* the number of devices, used + * only internally and subject + * to incorrectness and change */ +}; +static spinlock_t pcmcia_dev_list_lock; + +#define DS_SOCKET_PRESENT 0x01 +#define DS_SOCKET_BUSY 0x02 +#define DS_SOCKET_REMOVAL_PENDING 0x10 +#define DS_SOCKET_DEAD 0x80 + +/*====================================================================*/ + +static int major_dev = -1; + +static int unbind_request(struct pcmcia_bus_socket *s); + +/*====================================================================*/ + +/* code which was in cs.c before */ + +/* String tables for error messages */ + +typedef struct lookup_t { + int key; + char *msg; +} lookup_t; + +static const lookup_t error_table[] = { + { CS_SUCCESS, "Operation succeeded" }, + { CS_BAD_ADAPTER, "Bad adapter" }, + { CS_BAD_ATTRIBUTE, "Bad attribute", }, + { CS_BAD_BASE, "Bad base address" }, + { CS_BAD_EDC, "Bad EDC" }, + { CS_BAD_IRQ, "Bad IRQ" }, + { CS_BAD_OFFSET, "Bad offset" }, + { CS_BAD_PAGE, "Bad page number" }, + { CS_READ_FAILURE, "Read failure" }, + { CS_BAD_SIZE, "Bad size" }, + { CS_BAD_SOCKET, "Bad socket" }, + { CS_BAD_TYPE, "Bad type" }, + { CS_BAD_VCC, "Bad Vcc" }, + { CS_BAD_VPP, "Bad Vpp" }, + { CS_BAD_WINDOW, "Bad window" }, + { CS_WRITE_FAILURE, "Write failure" }, + { CS_NO_CARD, "No card present" }, + { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, + { CS_UNSUPPORTED_MODE, "Unsupported mode" }, + { CS_BAD_SPEED, "Bad speed" }, + { CS_BUSY, "Resource busy" }, + { CS_GENERAL_FAILURE, "General failure" }, + { CS_WRITE_PROTECTED, "Write protected" }, + { CS_BAD_ARG_LENGTH, "Bad argument length" }, + { CS_BAD_ARGS, "Bad arguments" }, + { CS_CONFIGURATION_LOCKED, "Configuration locked" }, + { CS_IN_USE, "Resource in use" }, + { CS_NO_MORE_ITEMS, "No more items" }, + { CS_OUT_OF_RESOURCE, "Out of resource" }, + { CS_BAD_HANDLE, "Bad handle" }, + { CS_BAD_TUPLE, "Bad CIS tuple" } +}; + + +static const lookup_t service_table[] = { + { AccessConfigurationRegister, "AccessConfigurationRegister" }, + { AddSocketServices, "AddSocketServices" }, + { AdjustResourceInfo, "AdjustResourceInfo" }, + { CheckEraseQueue, "CheckEraseQueue" }, + { CloseMemory, "CloseMemory" }, + { DeregisterClient, "DeregisterClient" }, + { DeregisterEraseQueue, "DeregisterEraseQueue" }, + { GetCardServicesInfo, "GetCardServicesInfo" }, + { GetClientInfo, "GetClientInfo" }, + { GetConfigurationInfo, "GetConfigurationInfo" }, + { GetEventMask, "GetEventMask" }, + { GetFirstClient, "GetFirstClient" }, + { GetFirstRegion, "GetFirstRegion" }, + { GetFirstTuple, "GetFirstTuple" }, + { GetNextClient, "GetNextClient" }, + { GetNextRegion, "GetNextRegion" }, + { GetNextTuple, "GetNextTuple" }, + { GetStatus, "GetStatus" }, + { GetTupleData, "GetTupleData" }, + { MapMemPage, "MapMemPage" }, + { ModifyConfiguration, "ModifyConfiguration" }, + { ModifyWindow, "ModifyWindow" }, + { OpenMemory, "OpenMemory" }, + { ParseTuple, "ParseTuple" }, + { ReadMemory, "ReadMemory" }, + { RegisterClient, "RegisterClient" }, + { RegisterEraseQueue, "RegisterEraseQueue" }, + { RegisterMTD, "RegisterMTD" }, + { ReleaseConfiguration, "ReleaseConfiguration" }, + { ReleaseIO, "ReleaseIO" }, + { ReleaseIRQ, "ReleaseIRQ" }, + { ReleaseWindow, "ReleaseWindow" }, + { RequestConfiguration, "RequestConfiguration" }, + { RequestIO, "RequestIO" }, + { RequestIRQ, "RequestIRQ" }, + { RequestSocketMask, "RequestSocketMask" }, + { RequestWindow, "RequestWindow" }, + { ResetCard, "ResetCard" }, + { SetEventMask, "SetEventMask" }, + { ValidateCIS, "ValidateCIS" }, + { WriteMemory, "WriteMemory" }, + { BindDevice, "BindDevice" }, + { BindMTD, "BindMTD" }, + { ReportError, "ReportError" }, + { SuspendCard, "SuspendCard" }, + { ResumeCard, "ResumeCard" }, + { EjectCard, "EjectCard" }, + { InsertCard, "InsertCard" }, + { ReplaceCIS, "ReplaceCIS" } +}; + + +int pcmcia_report_error(client_handle_t handle, error_info_t *err) +{ + int i; + char *serv; + + if (CHECK_HANDLE(handle)) + printk(KERN_NOTICE); + else { + struct pcmcia_device *p_dev = handle_to_pdev(handle); + printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); + } + + for (i = 0; i < ARRAY_SIZE(service_table); i++) + if (service_table[i].key == err->func) + break; + if (i < ARRAY_SIZE(service_table)) + serv = service_table[i].msg; + else + serv = "Unknown service number"; + + for (i = 0; i < ARRAY_SIZE(error_table); i++) + if (error_table[i].key == err->retcode) + break; + if (i < ARRAY_SIZE(error_table)) + printk("%s: %s\n", serv, error_table[i].msg); + else + printk("%s: Unknown error code %#x\n", serv, err->retcode); + + return CS_SUCCESS; +} /* report_error */ +EXPORT_SYMBOL(pcmcia_report_error); + +/* end of code which was in cs.c before */ + +/*======================================================================*/ + +void cs_error(client_handle_t handle, int func, int ret) +{ + error_info_t err = { func, ret }; + pcmcia_report_error(handle, &err); +} +EXPORT_SYMBOL(cs_error); + +/*======================================================================*/ + +static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info); +static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr); + +static void pcmcia_release_bus_socket(struct kref *refcount) +{ + struct pcmcia_bus_socket *s = container_of(refcount, struct pcmcia_bus_socket, refcount); + pcmcia_put_socket(s->parent); + kfree(s); +} + +static void pcmcia_put_bus_socket(struct pcmcia_bus_socket *s) +{ + kref_put(&s->refcount, pcmcia_release_bus_socket); +} + +static struct pcmcia_bus_socket *pcmcia_get_bus_socket(struct pcmcia_bus_socket *s) +{ + kref_get(&s->refcount); + return (s); +} + +/** + * pcmcia_register_driver - register a PCMCIA driver with the bus core + * + * Registers a PCMCIA driver with the PCMCIA bus core. + */ +static int pcmcia_device_probe(struct device *dev); +static int pcmcia_device_remove(struct device * dev); + +int pcmcia_register_driver(struct pcmcia_driver *driver) +{ + if (!driver) + return -EINVAL; + + /* initialize common fields */ + driver->drv.bus = &pcmcia_bus_type; + driver->drv.owner = driver->owner; + driver->drv.probe = pcmcia_device_probe; + driver->drv.remove = pcmcia_device_remove; + + return driver_register(&driver->drv); +} +EXPORT_SYMBOL(pcmcia_register_driver); + +/** + * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core + */ +void pcmcia_unregister_driver(struct pcmcia_driver *driver) +{ + driver_unregister(&driver->drv); +} +EXPORT_SYMBOL(pcmcia_unregister_driver); + +#ifdef CONFIG_PROC_FS +static struct proc_dir_entry *proc_pccard = NULL; + +static int proc_read_drivers_callback(struct device_driver *driver, void *d) +{ + char **p = d; + struct pcmcia_driver *p_drv = container_of(driver, + struct pcmcia_driver, drv); + + *p += sprintf(*p, "%-24.24s 1 %d\n", p_drv->drv.name, +#ifdef CONFIG_MODULE_UNLOAD + (p_drv->owner) ? module_refcount(p_drv->owner) : 1 +#else + 1 +#endif + ); + d = (void *) p; + + return 0; +} + +static int proc_read_drivers(char *buf, char **start, off_t pos, + int count, int *eof, void *data) +{ + char *p = buf; + + bus_for_each_drv(&pcmcia_bus_type, NULL, + (void *) &p, proc_read_drivers_callback); + + return (p - buf); +} +#endif + +/* pcmcia_device handling */ + +static struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) +{ + struct device *tmp_dev; + tmp_dev = get_device(&p_dev->dev); + if (!tmp_dev) + return NULL; + return to_pcmcia_dev(tmp_dev); +} + +static void pcmcia_put_dev(struct pcmcia_device *p_dev) +{ + if (p_dev) + put_device(&p_dev->dev); +} + +static void pcmcia_release_dev(struct device *dev) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + ds_dbg(1, "releasing dev %p\n", p_dev); + pcmcia_put_bus_socket(p_dev->socket->pcmcia); + kfree(p_dev); +} + + +static int pcmcia_device_probe(struct device * dev) +{ + struct pcmcia_device *p_dev; + struct pcmcia_driver *p_drv; + int ret = 0; + + dev = get_device(dev); + if (!dev) + return -ENODEV; + + p_dev = to_pcmcia_dev(dev); + p_drv = to_pcmcia_drv(dev->driver); + + if (!try_module_get(p_drv->owner)) { + ret = -EINVAL; + goto put_dev; + } + + if (p_drv->attach) { + p_dev->instance = p_drv->attach(); + if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) { + printk(KERN_NOTICE "ds: unable to create instance " + "of '%s'!\n", p_drv->drv.name); + ret = -EINVAL; + } + } + + if (ret) + module_put(p_drv->owner); + put_dev: + if ((ret) || !(p_drv->attach)) + put_device(dev); + return (ret); +} + + +static int pcmcia_device_remove(struct device * dev) +{ + struct pcmcia_device *p_dev; + struct pcmcia_driver *p_drv; + + /* detach the "instance" */ + p_dev = to_pcmcia_dev(dev); + p_drv = to_pcmcia_drv(dev->driver); + + if (p_drv) { + if ((p_drv->detach) && (p_dev->instance)) { + p_drv->detach(p_dev->instance); + /* from pcmcia_probe_device */ + put_device(&p_dev->dev); + } + module_put(p_drv->owner); + } + + return 0; +} + + + +/* + * pcmcia_device_query -- determine information about a pcmcia device + */ +static int pcmcia_device_query(struct pcmcia_device *p_dev) +{ + cistpl_manfid_t manf_id; + cistpl_funcid_t func_id; + cistpl_vers_1_t vers1; + unsigned int i; + + if (!pccard_read_tuple(p_dev->socket, p_dev->func, + CISTPL_MANFID, &manf_id)) { + p_dev->manf_id = manf_id.manf; + p_dev->card_id = manf_id.card; + p_dev->has_manf_id = 1; + p_dev->has_card_id = 1; + } + + if (!pccard_read_tuple(p_dev->socket, p_dev->func, + CISTPL_FUNCID, &func_id)) { + p_dev->func_id = func_id.func; + p_dev->has_func_id = 1; + } else { + /* rule of thumb: cards with no FUNCID, but with + * common memory device geometry information, are + * probably memory cards (from pcmcia-cs) */ + cistpl_device_geo_t devgeo; + if (!pccard_read_tuple(p_dev->socket, p_dev->func, + CISTPL_DEVICE_GEO, &devgeo)) { + ds_dbg(0, "mem device geometry probably means " + "FUNCID_MEMORY\n"); + p_dev->func_id = CISTPL_FUNCID_MEMORY; + p_dev->has_func_id = 1; + } + } + + if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, + &vers1)) { + for (i=0; i < vers1.ns; i++) { + char *tmp; + unsigned int length; + + tmp = vers1.str + vers1.ofs[i]; + + length = strlen(tmp) + 1; + if ((length < 3) || (length > 255)) + continue; + + p_dev->prod_id[i] = kmalloc(sizeof(char) * length, + GFP_KERNEL); + if (!p_dev->prod_id[i]) + continue; + + p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], + tmp, length); + } + } + + return 0; +} + + +/* device_add_lock is needed to avoid double registration by cardmgr and kernel. + * Serializes pcmcia_device_add; will most likely be removed in future. + * + * While it has the caveat that adding new PCMCIA devices inside(!) device_register() + * won't work, this doesn't matter much at the moment: the driver core doesn't + * support it either. + */ +static DECLARE_MUTEX(device_add_lock); + +static struct pcmcia_device * pcmcia_device_add(struct pcmcia_bus_socket *s, unsigned int function) +{ + struct pcmcia_device *p_dev; + unsigned long flags; + + s = pcmcia_get_bus_socket(s); + if (!s) + return NULL; + + down(&device_add_lock); + + p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL); + if (!p_dev) + goto err_put; + memset(p_dev, 0, sizeof(struct pcmcia_device)); + + p_dev->socket = s->parent; + p_dev->device_no = (s->device_count++); + p_dev->func = function; + + p_dev->dev.bus = &pcmcia_bus_type; + p_dev->dev.parent = s->parent->dev.dev; + p_dev->dev.release = pcmcia_release_dev; + sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); + + /* compat */ + p_dev->client.client_magic = CLIENT_MAGIC; + p_dev->client.Socket = s->parent; + p_dev->client.Function = function; + p_dev->client.state = CLIENT_UNBOUND; + + /* Add to the list in pcmcia_bus_socket */ + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + list_add_tail(&p_dev->socket_device_list, &s->devices_list); + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + + if (device_register(&p_dev->dev)) { + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + list_del(&p_dev->socket_device_list); + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + + goto err_free; + } + + up(&device_add_lock); + + return p_dev; + + err_free: + kfree(p_dev); + s->device_count--; + err_put: + up(&device_add_lock); + pcmcia_put_bus_socket(s); + + return NULL; +} + + +static int pcmcia_card_add(struct pcmcia_socket *s) +{ + cisinfo_t cisinfo; + cistpl_longlink_mfc_t mfc; + unsigned int no_funcs, i; + int ret = 0; + + if (!(s->resource_setup_done)) + return -EAGAIN; /* try again, but later... */ + + pcmcia_validate_mem(s); + ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); + if (ret || !cisinfo.Chains) { + ds_dbg(0, "invalid CIS or invalid resources\n"); + return -ENODEV; + } + + if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) + no_funcs = mfc.nfn; + else + no_funcs = 1; + + /* this doesn't handle multifunction devices on one pcmcia function + * yet. */ + for (i=0; i < no_funcs; i++) + pcmcia_device_add(s->pcmcia, i); + + return (ret); +} + + +static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { + struct pcmcia_device * p_dev = to_pcmcia_dev(dev); + struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); + + /* matching by cardmgr */ + if (p_dev->cardmgr == p_drv) + return 1; + + return 0; +} + +/************************ per-device sysfs output ***************************/ + +#define pcmcia_device_attr(field, test, format) \ +static ssize_t field##_show (struct device *dev, char *buf) \ +{ \ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ + return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ +} + +#define pcmcia_device_stringattr(name, field) \ +static ssize_t name##_show (struct device *dev, char *buf) \ +{ \ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ + return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ +} + +pcmcia_device_attr(func, socket, "0x%02x\n"); +pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); +pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); +pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); +pcmcia_device_stringattr(prod_id1, prod_id[0]); +pcmcia_device_stringattr(prod_id2, prod_id[1]); +pcmcia_device_stringattr(prod_id3, prod_id[2]); +pcmcia_device_stringattr(prod_id4, prod_id[3]); + +static struct device_attribute pcmcia_dev_attrs[] = { + __ATTR(function, 0444, func_show, NULL), + __ATTR_RO(func_id), + __ATTR_RO(manf_id), + __ATTR_RO(card_id), + __ATTR_RO(prod_id1), + __ATTR_RO(prod_id2), + __ATTR_RO(prod_id3), + __ATTR_RO(prod_id4), + __ATTR_NULL, +}; + + +/*====================================================================== + + These manage a ring buffer of events pending for one user process + +======================================================================*/ + +static int queue_empty(user_info_t *user) +{ + return (user->event_head == user->event_tail); +} + +static event_t get_queued_event(user_info_t *user) +{ + user->event_tail = (user->event_tail+1) % MAX_EVENTS; + return user->event[user->event_tail]; +} + +static void queue_event(user_info_t *user, event_t event) +{ + user->event_head = (user->event_head+1) % MAX_EVENTS; + if (user->event_head == user->event_tail) + user->event_tail = (user->event_tail+1) % MAX_EVENTS; + user->event[user->event_head] = event; +} + +static void handle_event(struct pcmcia_bus_socket *s, event_t event) +{ + user_info_t *user; + for (user = s->user; user; user = user->next) + queue_event(user, event); + wake_up_interruptible(&s->queue); +} + + +/*====================================================================== + + The card status event handler. + +======================================================================*/ + +struct send_event_data { + struct pcmcia_socket *skt; + event_t event; + int priority; +}; + +static int send_event_callback(struct device *dev, void * _data) +{ + struct pcmcia_device *p_dev = to_pcmcia_dev(dev); + struct send_event_data *data = _data; + + /* we get called for all sockets, but may only pass the event + * for drivers _on the affected socket_ */ + if (p_dev->socket != data->skt) + return 0; + + if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE)) + return 0; + + if (p_dev->client.EventMask & data->event) + return EVENT(&p_dev->client, data->event, data->priority); + + return 0; +} + +static int send_event(struct pcmcia_socket *s, event_t event, int priority) +{ + int ret = 0; + struct send_event_data private; + struct pcmcia_bus_socket *skt = pcmcia_get_bus_socket(s->pcmcia); + + if (!skt) + return 0; + + private.skt = s; + private.event = event; + private.priority = priority; + + ret = bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback); + + pcmcia_put_bus_socket(skt); + return ret; +} /* send_event */ + + +/* Normally, the event is passed to individual drivers after + * informing userspace. Only for CS_EVENT_CARD_REMOVAL this + * is inversed to maintain historic compatibility. + */ + +static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) +{ + struct pcmcia_bus_socket *s = skt->pcmcia; + int ret = 0; + + ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", + event, priority, s); + + switch (event) { + + case CS_EVENT_CARD_REMOVAL: + s->state &= ~DS_SOCKET_PRESENT; + send_event(skt, event, priority); + unbind_request(s); + handle_event(s, event); + break; + + case CS_EVENT_CARD_INSERTION: + s->state |= DS_SOCKET_PRESENT; + pcmcia_card_add(skt); + handle_event(s, event); + break; + + case CS_EVENT_EJECTION_REQUEST: + ret = send_event(skt, event, priority); + break; + + default: + handle_event(s, event); + send_event(skt, event, priority); + break; + } + + return 0; +} /* ds_event */ + + +/*====================================================================== + + bind_request() and bind_device() are merged by now. Register_client() + is called right at the end of bind_request(), during the driver's + ->attach() call. Individual descriptions: + + bind_request() connects a socket to a particular client driver. + It looks up the specified device ID in the list of registered + drivers, binds it to the socket, and tries to create an instance + of the device. unbind_request() deletes a driver instance. + + Bind_device() associates a device driver with a particular socket. + It is normally called by Driver Services after it has identified + a newly inserted card. An instance of that driver will then be + eligible to register as a client of this socket. + + Register_client() uses the dev_info_t handle to match the + caller with a socket. The driver must have already been bound + to a socket with bind_device() -- in fact, bind_device() + allocates the client structure that will be used. + +======================================================================*/ + +static int bind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info) +{ + struct pcmcia_driver *p_drv; + struct pcmcia_device *p_dev; + int ret = 0; + unsigned long flags; + + s = pcmcia_get_bus_socket(s); + if (!s) + return -EINVAL; + + ds_dbg(2, "bind_request(%d, '%s')\n", s->parent->sock, + (char *)bind_info->dev_info); + + p_drv = get_pcmcia_driver(&bind_info->dev_info); + if (!p_drv) { + ret = -EINVAL; + goto err_put; + } + + if (!try_module_get(p_drv->owner)) { + ret = -EINVAL; + goto err_put_driver; + } + + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + list_for_each_entry(p_dev, &s->devices_list, socket_device_list) { + if (p_dev->func == bind_info->function) { + if ((p_dev->dev.driver == &p_drv->drv)) { + if (p_dev->cardmgr) { + /* if there's already a device + * registered, and it was registered + * by userspace before, we need to + * return the "instance". */ + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + bind_info->instance = p_dev->instance; + ret = -EBUSY; + goto err_put_module; + } else { + /* the correct driver managed to bind + * itself magically to the correct + * device. */ + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + p_dev->cardmgr = p_drv; + ret = 0; + goto err_put_module; + } + } else if (!p_dev->dev.driver) { + /* there's already a device available where + * no device has been bound to yet. So we don't + * need to register a device! */ + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + goto rescan; + } + } + } + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + + p_dev = pcmcia_device_add(s, bind_info->function); + if (!p_dev) { + ret = -EIO; + goto err_put_module; + } + +rescan: + p_dev->cardmgr = p_drv; + + pcmcia_device_query(p_dev); + + /* + * Prevent this racing with a card insertion. + */ + down(&s->parent->skt_sem); + bus_rescan_devices(&pcmcia_bus_type); + up(&s->parent->skt_sem); + + /* check whether the driver indeed matched. I don't care if this + * is racy or not, because it can only happen on cardmgr access + * paths... + */ + if (!(p_dev->dev.driver == &p_drv->drv)) + p_dev->cardmgr = NULL; + + err_put_module: + module_put(p_drv->owner); + err_put_driver: + put_driver(&p_drv->drv); + err_put: + pcmcia_put_bus_socket(s); + + return (ret); +} /* bind_request */ + + +int pcmcia_register_client(client_handle_t *handle, client_reg_t *req) +{ + client_t *client = NULL; + struct pcmcia_socket *s; + struct pcmcia_bus_socket *skt = NULL; + struct pcmcia_device *p_dev = NULL; + + /* Look for unbound client with matching dev_info */ + down_read(&pcmcia_socket_list_rwsem); + list_for_each_entry(s, &pcmcia_socket_list, socket_list) { + unsigned long flags; + + if (s->state & SOCKET_CARDBUS) + continue; + + skt = s->pcmcia; + if (!skt) + continue; + skt = pcmcia_get_bus_socket(skt); + if (!skt) + continue; + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + list_for_each_entry(p_dev, &skt->devices_list, socket_device_list) { + struct pcmcia_driver *p_drv; + p_dev = pcmcia_get_dev(p_dev); + if (!p_dev) + continue; + if (!(p_dev->client.state & CLIENT_UNBOUND) || + (!p_dev->dev.driver)) { + pcmcia_put_dev(p_dev); + continue; + } + p_drv = to_pcmcia_drv(p_dev->dev.driver); + if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) { + client = &p_dev->client; + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + goto found; + } + pcmcia_put_dev(p_dev); + } + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + pcmcia_put_bus_socket(skt); + } + found: + up_read(&pcmcia_socket_list_rwsem); + if (!p_dev || !client) + return -ENODEV; + + pcmcia_put_bus_socket(skt); /* safe, as we already hold a reference from bind_device */ + + *handle = client; + client->state &= ~CLIENT_UNBOUND; + client->Socket = s; + client->EventMask = req->EventMask; + client->event_handler = req->event_handler; + client->event_callback_args = req->event_callback_args; + client->event_callback_args.client_handle = client; + + if (s->state & SOCKET_CARDBUS) + client->state |= CLIENT_CARDBUS; + + if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) && + (client->Function != BIND_FN_ALL)) { + cistpl_longlink_mfc_t mfc; + if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc) + == CS_SUCCESS) + s->functions = mfc.nfn; + else + s->functions = 1; + s->config = kmalloc(sizeof(config_t) * s->functions, + GFP_KERNEL); + if (!s->config) + goto out_no_resource; + memset(s->config, 0, sizeof(config_t) * s->functions); + } + + ds_dbg(1, "register_client(): client 0x%p, dev %s\n", + client, p_dev->dev.bus_id); + if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE) + EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW); + + if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) { + if (client->EventMask & CS_EVENT_CARD_INSERTION) + EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); + } + + return CS_SUCCESS; + + out_no_resource: + pcmcia_put_dev(p_dev); + return CS_OUT_OF_RESOURCE; +} /* register_client */ +EXPORT_SYMBOL(pcmcia_register_client); + + +/*====================================================================*/ + +extern struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s); + +static int get_device_info(struct pcmcia_bus_socket *s, bind_info_t *bind_info, int first) +{ + dev_node_t *node; + struct pcmcia_device *p_dev; + unsigned long flags; + int ret = 0; + +#ifdef CONFIG_CARDBUS + /* + * Some unbelievably ugly code to associate the PCI cardbus + * device and its driver with the PCMCIA "bind" information. + */ + { + struct pci_bus *bus; + + bus = pcmcia_lookup_bus(s->parent); + if (bus) { + struct list_head *list; + struct pci_dev *dev = NULL; + + list = bus->devices.next; + while (list != &bus->devices) { + struct pci_dev *pdev = pci_dev_b(list); + list = list->next; + + if (first) { + dev = pdev; + break; + } + + /* Try to handle "next" here some way? */ + } + if (dev && dev->driver) { + strlcpy(bind_info->name, dev->driver->name, DEV_NAME_LEN); + bind_info->major = 0; + bind_info->minor = 0; + bind_info->next = NULL; + return 0; + } + } + } +#endif + + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + list_for_each_entry(p_dev, &s->devices_list, socket_device_list) { + if (p_dev->func == bind_info->function) { + p_dev = pcmcia_get_dev(p_dev); + if (!p_dev) + continue; + goto found; + } + } + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + return -ENODEV; + + found: + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + + if ((!p_dev->instance) || + (p_dev->instance->state & DEV_CONFIG_PENDING)) { + ret = -EAGAIN; + goto err_put; + } + + if (first) + node = p_dev->instance->dev; + else + for (node = p_dev->instance->dev; node; node = node->next) + if (node == bind_info->next) + break; + if (!node) { + ret = -ENODEV; + goto err_put; + } + + strlcpy(bind_info->name, node->dev_name, DEV_NAME_LEN); + bind_info->major = node->major; + bind_info->minor = node->minor; + bind_info->next = node->next; + + err_put: + pcmcia_put_dev(p_dev); + return (ret); +} /* get_device_info */ + +/*====================================================================*/ + +/* unbind _all_ devices attached to a given pcmcia_bus_socket. The + * drivers have been called with EVENT_CARD_REMOVAL before. + */ +static int unbind_request(struct pcmcia_bus_socket *s) +{ + struct pcmcia_device *p_dev; + unsigned long flags; + + ds_dbg(2, "unbind_request(%d)\n", s->parent->sock); + + s->device_count = 0; + + for (;;) { + /* unregister all pcmcia_devices registered with this socket*/ + spin_lock_irqsave(&pcmcia_dev_list_lock, flags); + if (list_empty(&s->devices_list)) { + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + return 0; + } + p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list); + list_del(&p_dev->socket_device_list); + p_dev->client.state |= CLIENT_STALE; + spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); + + device_unregister(&p_dev->dev); + } + + return 0; +} /* unbind_request */ + +int pcmcia_deregister_client(client_handle_t handle) +{ + struct pcmcia_socket *s; + int i; + struct pcmcia_device *p_dev = handle_to_pdev(handle); + + if (CHECK_HANDLE(handle)) + return CS_BAD_HANDLE; + + s = SOCKET(handle); + ds_dbg(1, "deregister_client(%p)\n", handle); + + if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED)) + goto warn_out; + for (i = 0; i < MAX_WIN; i++) + if (handle->state & CLIENT_WIN_REQ(i)) + goto warn_out; + + if (handle->state & CLIENT_STALE) { + handle->client_magic = 0; + handle->state &= ~CLIENT_STALE; + pcmcia_put_dev(p_dev); + } else { + handle->state = CLIENT_UNBOUND; + handle->event_handler = NULL; + } + + return CS_SUCCESS; + warn_out: + printk(KERN_WARNING "ds: deregister_client was called too early.\n"); + return CS_IN_USE; +} /* deregister_client */ +EXPORT_SYMBOL(pcmcia_deregister_client); + + +/*====================================================================== + + The user-mode PC Card device interface + +======================================================================*/ + +static int ds_open(struct inode *inode, struct file *file) +{ + socket_t i = iminor(inode); + struct pcmcia_bus_socket *s; + user_info_t *user; + + ds_dbg(0, "ds_open(socket %d)\n", i); + + s = get_socket_info_by_nr(i); + if (!s) + return -ENODEV; + s = pcmcia_get_bus_socket(s); + if (!s) + return -ENODEV; + + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { + if (s->state & DS_SOCKET_BUSY) { + pcmcia_put_bus_socket(s); + return -EBUSY; + } + else + s->state |= DS_SOCKET_BUSY; + } + + user = kmalloc(sizeof(user_info_t), GFP_KERNEL); + if (!user) { + pcmcia_put_bus_socket(s); + return -ENOMEM; + } + user->event_tail = user->event_head = 0; + user->next = s->user; + user->user_magic = USER_MAGIC; + user->socket = s; + s->user = user; + file->private_data = user; + + if (s->state & DS_SOCKET_PRESENT) + queue_event(user, CS_EVENT_CARD_INSERTION); + return 0; +} /* ds_open */ + +/*====================================================================*/ + +static int ds_release(struct inode *inode, struct file *file) +{ + struct pcmcia_bus_socket *s; + user_info_t *user, **link; + + ds_dbg(0, "ds_release(socket %d)\n", iminor(inode)); + + user = file->private_data; + if (CHECK_USER(user)) + goto out; + + s = user->socket; + + /* Unlink user data structure */ + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { + s->state &= ~DS_SOCKET_BUSY; + } + file->private_data = NULL; + for (link = &s->user; *link; link = &(*link)->next) + if (*link == user) break; + if (link == NULL) + goto out; + *link = user->next; + user->user_magic = 0; + kfree(user); + pcmcia_put_bus_socket(s); +out: + return 0; +} /* ds_release */ + +/*====================================================================*/ + +static ssize_t ds_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct pcmcia_bus_socket *s; + user_info_t *user; + int ret; + + ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_dentry->d_inode)); + + if (count < 4) + return -EINVAL; + + user = file->private_data; + if (CHECK_USER(user)) + return -EIO; + + s = user->socket; + if (s->state & DS_SOCKET_DEAD) + return -EIO; + + ret = wait_event_interruptible(s->queue, !queue_empty(user)); + if (ret == 0) + ret = put_user(get_queued_event(user), (int __user *)buf) ? -EFAULT : 4; + + return ret; +} /* ds_read */ + +/*====================================================================*/ + +static ssize_t ds_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_dentry->d_inode)); + + if (count != 4) + return -EINVAL; + if ((file->f_flags & O_ACCMODE) == O_RDONLY) + return -EBADF; + + return -EIO; +} /* ds_write */ + +/*====================================================================*/ + +/* No kernel lock - fine */ +static u_int ds_poll(struct file *file, poll_table *wait) +{ + struct pcmcia_bus_socket *s; + user_info_t *user; + + ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_dentry->d_inode)); + + user = file->private_data; + if (CHECK_USER(user)) + return POLLERR; + s = user->socket; + /* + * We don't check for a dead socket here since that + * will send cardmgr into an endless spin. + */ + poll_wait(file, &s->queue, wait); + if (!queue_empty(user)) + return POLLIN | POLLRDNORM; + return 0; +} /* ds_poll */ + +/*====================================================================*/ + +extern int pcmcia_adjust_resource_info(adjust_t *adj); + +static int ds_ioctl(struct inode * inode, struct file * file, + u_int cmd, u_long arg) +{ + struct pcmcia_bus_socket *s; + void __user *uarg = (char __user *)arg; + u_int size; + int ret, err; + ds_ioctl_arg_t *buf; + user_info_t *user; + + ds_dbg(2, "ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg); + + user = file->private_data; + if (CHECK_USER(user)) + return -EIO; + + s = user->socket; + if (s->state & DS_SOCKET_DEAD) + return -EIO; + + size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; + if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL; + + /* Permission check */ + if (!(cmd & IOC_OUT) && !capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (cmd & IOC_IN) { + if (!access_ok(VERIFY_READ, uarg, size)) { + ds_dbg(3, "ds_ioctl(): verify_read = %d\n", -EFAULT); + return -EFAULT; + } + } + if (cmd & IOC_OUT) { + if (!access_ok(VERIFY_WRITE, uarg, size)) { + ds_dbg(3, "ds_ioctl(): verify_write = %d\n", -EFAULT); + return -EFAULT; + } + } + buf = kmalloc(sizeof(ds_ioctl_arg_t), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + err = ret = 0; + + if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size); + + switch (cmd) { + case DS_ADJUST_RESOURCE_INFO: + ret = pcmcia_adjust_resource_info(&buf->adjust); + break; + case DS_GET_CARD_SERVICES_INFO: + ret = pcmcia_get_card_services_info(&buf->servinfo); + break; + case DS_GET_CONFIGURATION_INFO: + if (buf->config.Function && + (buf->config.Function >= s->parent->functions)) + ret = CS_BAD_ARGS; + else + ret = pccard_get_configuration_info(s->parent, + buf->config.Function, &buf->config); + break; + case DS_GET_FIRST_TUPLE: + down(&s->parent->skt_sem); + pcmcia_validate_mem(s->parent); + up(&s->parent->skt_sem); + ret = pccard_get_first_tuple(s->parent, BIND_FN_ALL, &buf->tuple); + break; + case DS_GET_NEXT_TUPLE: + ret = pccard_get_next_tuple(s->parent, BIND_FN_ALL, &buf->tuple); + break; + case DS_GET_TUPLE_DATA: + buf->tuple.TupleData = buf->tuple_parse.data; + buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data); + ret = pccard_get_tuple_data(s->parent, &buf->tuple); + break; + case DS_PARSE_TUPLE: + buf->tuple.TupleData = buf->tuple_parse.data; + ret = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse); + break; + case DS_RESET_CARD: + ret = pccard_reset_card(s->parent); + break; + case DS_GET_STATUS: + if (buf->status.Function && + (buf->status.Function >= s->parent->functions)) + ret = CS_BAD_ARGS; + else + ret = pccard_get_status(s->parent, buf->status.Function, &buf->status); + break; + case DS_VALIDATE_CIS: + down(&s->parent->skt_sem); + pcmcia_validate_mem(s->parent); + up(&s->parent->skt_sem); + ret = pccard_validate_cis(s->parent, BIND_FN_ALL, &buf->cisinfo); + break; + case DS_SUSPEND_CARD: + ret = pcmcia_suspend_card(s->parent); + break; + case DS_RESUME_CARD: + ret = pcmcia_resume_card(s->parent); + break; + case DS_EJECT_CARD: + err = pcmcia_eject_card(s->parent); + break; + case DS_INSERT_CARD: + err = pcmcia_insert_card(s->parent); + break; + case DS_ACCESS_CONFIGURATION_REGISTER: + if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) { + err = -EPERM; + goto free_out; + } + if (buf->conf_reg.Function && + (buf->conf_reg.Function >= s->parent->functions)) + ret = CS_BAD_ARGS; + else + ret = pccard_access_configuration_register(s->parent, + buf->conf_reg.Function, &buf->conf_reg); + break; + case DS_GET_FIRST_REGION: + case DS_GET_NEXT_REGION: + case DS_BIND_MTD: + if (!capable(CAP_SYS_ADMIN)) { + err = -EPERM; + goto free_out; + } else { + static int printed = 0; + if (!printed) { + printk(KERN_WARNING "2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n"); + printk(KERN_WARNING "MTD handling any more.\n"); + printed++; + } + } + err = -EINVAL; + goto free_out; + break; + case DS_GET_FIRST_WINDOW: + ret = pcmcia_get_window(s->parent, &buf->win_info.handle, 0, + &buf->win_info.window); + break; + case DS_GET_NEXT_WINDOW: + ret = pcmcia_get_window(s->parent, &buf->win_info.handle, + buf->win_info.handle->index + 1, &buf->win_info.window); + break; + case DS_GET_MEM_PAGE: + ret = pcmcia_get_mem_page(buf->win_info.handle, + &buf->win_info.map); + break; + case DS_REPLACE_CIS: + ret = pcmcia_replace_cis(s->parent, &buf->cisdump); + break; + case DS_BIND_REQUEST: + if (!capable(CAP_SYS_ADMIN)) { + err = -EPERM; + goto free_out; + } + err = bind_request(s, &buf->bind_info); + break; + case DS_GET_DEVICE_INFO: + err = get_device_info(s, &buf->bind_info, 1); + break; + case DS_GET_NEXT_DEVICE: + err = get_device_info(s, &buf->bind_info, 0); + break; + case DS_UNBIND_REQUEST: + err = 0; + break; + default: + err = -EINVAL; + } + + if ((err == 0) && (ret != CS_SUCCESS)) { + ds_dbg(2, "ds_ioctl: ret = %d\n", ret); + switch (ret) { + case CS_BAD_SOCKET: case CS_NO_CARD: + err = -ENODEV; break; + case CS_BAD_ARGS: case CS_BAD_ATTRIBUTE: case CS_BAD_IRQ: + case CS_BAD_TUPLE: + err = -EINVAL; break; + case CS_IN_USE: + err = -EBUSY; break; + case CS_OUT_OF_RESOURCE: + err = -ENOSPC; break; + case CS_NO_MORE_ITEMS: + err = -ENODATA; break; + case CS_UNSUPPORTED_FUNCTION: + err = -ENOSYS; break; + default: + err = -EIO; break; + } + } + + if (cmd & IOC_OUT) { + if (__copy_to_user(uarg, (char *)buf, size)) + err = -EFAULT; + } + +free_out: + kfree(buf); + return err; +} /* ds_ioctl */ + +/*====================================================================*/ + +static struct file_operations ds_fops = { + .owner = THIS_MODULE, + .open = ds_open, + .release = ds_release, + .ioctl = ds_ioctl, + .read = ds_read, + .write = ds_write, + .poll = ds_poll, +}; + +static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev) +{ + struct pcmcia_socket *socket = class_get_devdata(class_dev); + struct pcmcia_bus_socket *s; + int ret; + + s = kmalloc(sizeof(struct pcmcia_bus_socket), GFP_KERNEL); + if(!s) + return -ENOMEM; + memset(s, 0, sizeof(struct pcmcia_bus_socket)); + + /* get reference to parent socket */ + s->parent = pcmcia_get_socket(socket); + if (!s->parent) { + printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); + kfree (s); + return -ENODEV; + } + + kref_init(&s->refcount); + + /* + * Ugly. But we want to wait for the socket threads to have started up. + * We really should let the drivers themselves drive some of this.. + */ + msleep(250); + + init_waitqueue_head(&s->queue); + INIT_LIST_HEAD(&s->devices_list); + + /* Set up hotline to Card Services */ + s->callback.owner = THIS_MODULE; + s->callback.event = &ds_event; + s->callback.resources_done = &pcmcia_card_add; + socket->pcmcia = s; + + ret = pccard_register_pcmcia(socket, &s->callback); + if (ret) { + printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); + pcmcia_put_bus_socket(s); + socket->pcmcia = NULL; + return (ret); + } + + return 0; +} + + +static void pcmcia_bus_remove_socket(struct class_device *class_dev) +{ + struct pcmcia_socket *socket = class_get_devdata(class_dev); + + if (!socket || !socket->pcmcia) + return; + + pccard_register_pcmcia(socket, NULL); + + socket->pcmcia->state |= DS_SOCKET_DEAD; + pcmcia_put_bus_socket(socket->pcmcia); + socket->pcmcia = NULL; + + return; +} + + +/* the pcmcia_bus_interface is used to handle pcmcia socket devices */ +static struct class_interface pcmcia_bus_interface = { + .class = &pcmcia_socket_class, + .add = &pcmcia_bus_add_socket, + .remove = &pcmcia_bus_remove_socket, +}; + + +struct bus_type pcmcia_bus_type = { + .name = "pcmcia", + .match = pcmcia_bus_match, + .dev_attrs = pcmcia_dev_attrs, +}; +EXPORT_SYMBOL(pcmcia_bus_type); + + +static int __init init_pcmcia_bus(void) +{ + int i; + + spin_lock_init(&pcmcia_dev_list_lock); + + bus_register(&pcmcia_bus_type); + class_interface_register(&pcmcia_bus_interface); + + /* Set up character device for user mode clients */ + i = register_chrdev(0, "pcmcia", &ds_fops); + if (i == -EBUSY) + printk(KERN_NOTICE "unable to find a free device # for " + "Driver Services\n"); + else + major_dev = i; + +#ifdef CONFIG_PROC_FS + proc_pccard = proc_mkdir("pccard", proc_bus); + if (proc_pccard) + create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL); +#endif + + return 0; +} +fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that + * pcmcia_socket_class is already registered */ + + +static void __exit exit_pcmcia_bus(void) +{ + class_interface_unregister(&pcmcia_bus_interface); + +#ifdef CONFIG_PROC_FS + if (proc_pccard) { + remove_proc_entry("drivers", proc_pccard); + remove_proc_entry("pccard", proc_bus); + } +#endif + if (major_dev != -1) + unregister_chrdev(major_dev, "pcmcia"); + + bus_unregister(&pcmcia_bus_type); +} +module_exit(exit_pcmcia_bus); + + + +/* helpers for backwards-compatible functions */ + +static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr) +{ + struct pcmcia_socket * s = pcmcia_get_socket_by_nr(nr); + if (s && s->pcmcia) + return s->pcmcia; + else + return NULL; +} + +/* backwards-compatible accessing of driver --- by name! */ + +static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info) +{ + struct device_driver *drv; + struct pcmcia_driver *p_drv; + + drv = driver_find((char *) dev_info, &pcmcia_bus_type); + if (!drv) + return NULL; + + p_drv = container_of(drv, struct pcmcia_driver, drv); + + return (p_drv); +} + +MODULE_ALIAS("ds"); |