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linux/drivers/pcmcia/ds.c
Bernhard Walle 6179b5562d add new_id to PCMCIA drivers 
PCI drivers have the new_id file in sysfs which allows new IDs to be added
at runtime.  The advantage is to avoid re-compilation of a driver that
works for a new device, but it's ID table doesn't contain the new device.
This mechanism is only meant for testing, after the driver has been tested
successfully, the ID should be added in source code so that new revisions
of the kernel automatically detect the device.

The implementation follows the PCI implementation. The interface is documented
in Documentation/pcmcia/driver.txt. Computations should be done in userspace,
so the sysfs string contains the raw structure members for matching.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:12:50 -07:00

1558 lines
39 KiB
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/*
* 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 - 2006 Dominik Brodowski
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/crc32.h>
#include <linux/firmware.h>
#include <linux/kref.h>
#define IN_CARD_SERVICES
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ss.h>
#include "cs_internal.h"
#include "ds_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
spinlock_t pcmcia_dev_list_lock;
/*====================================================================*/
/* 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" }
};
static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
{
int i;
char *serv;
if (!p_dev)
printk(KERN_NOTICE);
else
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 */
/* end of code which was in cs.c before */
/*======================================================================*/
void cs_error(struct pcmcia_device *p_dev, int func, int ret)
{
error_info_t err = { func, ret };
pcmcia_report_error(p_dev, &err);
}
EXPORT_SYMBOL(cs_error);
static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
{
struct pcmcia_device_id *did = p_drv->id_table;
unsigned int i;
u32 hash;
if (!p_drv->probe || !p_drv->remove)
printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
"function\n", p_drv->drv.name);
while (did && did->match_flags) {
for (i=0; i<4; i++) {
if (!did->prod_id[i])
continue;
hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
if (hash == did->prod_id_hash[i])
continue;
printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
"product string \"%s\": is 0x%x, should "
"be 0x%x\n", p_drv->drv.name, did->prod_id[i],
did->prod_id_hash[i], hash);
printk(KERN_DEBUG "pcmcia: see "
"Documentation/pcmcia/devicetable.txt for "
"details\n");
}
did++;
}
return;
}
/*======================================================================*/
struct pcmcia_dynid {
struct list_head node;
struct pcmcia_device_id id;
};
/**
* pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
* @driver: target device driver
* @buf: buffer for scanning device ID data
* @count: input size
*
* Adds a new dynamic PCMCIA device ID to this driver,
* and causes the driver to probe for all devices again.
*/
static ssize_t
pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
{
struct pcmcia_dynid *dynid;
struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
__u16 match_flags, manf_id, card_id;
__u8 func_id, function, device_no;
__u32 prod_id_hash[4] = {0, 0, 0, 0};
int fields=0;
int retval = 0;
fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
&match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
&prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
if (fields < 6)
return -EINVAL;
dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
if (!dynid)
return -ENOMEM;
INIT_LIST_HEAD(&dynid->node);
dynid->id.match_flags = match_flags;
dynid->id.manf_id = manf_id;
dynid->id.card_id = card_id;
dynid->id.func_id = func_id;
dynid->id.function = function;
dynid->id.device_no = device_no;
memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
spin_lock(&pdrv->dynids.lock);
list_add_tail(&pdrv->dynids.list, &dynid->node);
spin_unlock(&pdrv->dynids.lock);
if (get_driver(&pdrv->drv)) {
retval = driver_attach(&pdrv->drv);
put_driver(&pdrv->drv);
}
if (retval)
return retval;
return count;
}
static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
static void
pcmcia_free_dynids(struct pcmcia_driver *drv)
{
struct pcmcia_dynid *dynid, *n;
spin_lock(&drv->dynids.lock);
list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
list_del(&dynid->node);
kfree(dynid);
}
spin_unlock(&drv->dynids.lock);
}
static int
pcmcia_create_newid_file(struct pcmcia_driver *drv)
{
int error = 0;
if (drv->probe != NULL)
error = sysfs_create_file(&drv->drv.kobj,
&driver_attr_new_id.attr);
return error;
}
/**
* pcmcia_register_driver - register a PCMCIA driver with the bus core
*
* Registers a PCMCIA driver with the PCMCIA bus core.
*/
int pcmcia_register_driver(struct pcmcia_driver *driver)
{
int error;
if (!driver)
return -EINVAL;
pcmcia_check_driver(driver);
/* initialize common fields */
driver->drv.bus = &pcmcia_bus_type;
driver->drv.owner = driver->owner;
spin_lock_init(&driver->dynids.lock);
INIT_LIST_HEAD(&driver->dynids.list);
ds_dbg(3, "registering driver %s\n", driver->drv.name);
error = driver_register(&driver->drv);
if (error < 0)
return error;
error = pcmcia_create_newid_file(driver);
if (error)
driver_unregister(&driver->drv);
return error;
}
EXPORT_SYMBOL(pcmcia_register_driver);
/**
* pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
*/
void pcmcia_unregister_driver(struct pcmcia_driver *driver)
{
ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
driver_unregister(&driver->drv);
pcmcia_free_dynids(driver);
}
EXPORT_SYMBOL(pcmcia_unregister_driver);
/* pcmcia_device handling */
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);
}
void pcmcia_put_dev(struct pcmcia_device *p_dev)
{
if (p_dev)
put_device(&p_dev->dev);
}
static void pcmcia_release_function(struct kref *ref)
{
struct config_t *c = container_of(ref, struct config_t, ref);
ds_dbg(1, "releasing config_t\n");
kfree(c);
}
static void pcmcia_release_dev(struct device *dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id);
pcmcia_put_socket(p_dev->socket);
kfree(p_dev->devname);
kref_put(&p_dev->function_config->ref, pcmcia_release_function);
kfree(p_dev);
}
static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
{
if (!s->pcmcia_state.device_add_pending) {
ds_dbg(1, "scheduling to add %s secondary"
" device to %d\n", mfc ? "mfc" : "pfc", s->sock);
s->pcmcia_state.device_add_pending = 1;
s->pcmcia_state.mfc_pfc = mfc;
schedule_work(&s->device_add);
}
return;
}
static int pcmcia_device_probe(struct device * dev)
{
struct pcmcia_device *p_dev;
struct pcmcia_driver *p_drv;
struct pcmcia_device_id *did;
struct pcmcia_socket *s;
cistpl_config_t cis_config;
int ret = 0;
dev = get_device(dev);
if (!dev)
return -ENODEV;
p_dev = to_pcmcia_dev(dev);
p_drv = to_pcmcia_drv(dev->driver);
s = p_dev->socket;
ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id,
p_drv->drv.name);
if ((!p_drv->probe) || (!p_dev->function_config) ||
(!try_module_get(p_drv->owner))) {
ret = -EINVAL;
goto put_dev;
}
/* set up some more device information */
ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
&cis_config);
if (!ret) {
p_dev->conf.ConfigBase = cis_config.base;
p_dev->conf.Present = cis_config.rmask[0];
} else {
printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n");
p_dev->conf.ConfigBase = 0;
p_dev->conf.Present = 0;
}
ret = p_drv->probe(p_dev);
if (ret) {
ds_dbg(1, "binding %s to %s failed with %d\n",
p_dev->dev.bus_id, p_drv->drv.name, ret);
goto put_module;
}
/* handle pseudo multifunction devices:
* there are at most two pseudo multifunction devices.
* if we're matching against the first, schedule a
* call which will then check whether there are two
* pseudo devices, and if not, add the second one.
*/
did = p_dev->dev.driver_data;
if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
(p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
pcmcia_add_device_later(p_dev->socket, 0);
put_module:
if (ret)
module_put(p_drv->owner);
put_dev:
if (ret)
put_device(dev);
return (ret);
}
/*
* Removes a PCMCIA card from the device tree and socket list.
*/
static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
{
struct pcmcia_device *p_dev;
struct pcmcia_device *tmp;
unsigned long flags;
ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock,
leftover ? leftover->devname : "");
if (!leftover)
s->device_count = 0;
else
s->device_count = 1;
/* unregister all pcmcia_devices registered with this socket, except leftover */
list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
if (p_dev == leftover)
continue;
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
list_del(&p_dev->socket_device_list);
p_dev->_removed=1;
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id);
device_unregister(&p_dev->dev);
}
return;
}
static int pcmcia_device_remove(struct device * dev)
{
struct pcmcia_device *p_dev;
struct pcmcia_driver *p_drv;
struct pcmcia_device_id *did;
int i;
p_dev = to_pcmcia_dev(dev);
p_drv = to_pcmcia_drv(dev->driver);
ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id);
/* If we're removing the primary module driving a
* pseudo multi-function card, we need to unbind
* all devices
*/
did = p_dev->dev.driver_data;
if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
(p_dev->socket->device_count != 0) &&
(p_dev->device_no == 0))
pcmcia_card_remove(p_dev->socket, p_dev);
/* detach the "instance" */
if (!p_drv)
return 0;
if (p_drv->remove)
p_drv->remove(p_dev);
p_dev->dev_node = NULL;
/* check for proper unloading */
if (p_dev->_irq || p_dev->_io || p_dev->_locked)
printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
p_drv->drv.name);
for (i = 0; i < MAX_WIN; i++)
if (p_dev->_win & CLIENT_WIN_REQ(i))
printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
p_drv->drv.name);
/* references from pcmcia_probe_device */
pcmcia_put_dev(p_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;
vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
if (!vers1)
return -ENOMEM;
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;
devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
if (!devgeo) {
kfree(vers1);
return -ENOMEM;
}
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;
}
kfree(devgeo);
}
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 < 2) || (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);
}
}
kfree(vers1);
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 DEFINE_MUTEX(device_add_lock);
struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
{
struct pcmcia_device *p_dev, *tmp_dev;
unsigned long flags;
int bus_id_len;
s = pcmcia_get_socket(s);
if (!s)
return NULL;
mutex_lock(&device_add_lock);
ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
/* max of 4 devices per card */
if (s->device_count == 4)
goto err_put;
p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
if (!p_dev)
goto err_put;
p_dev->socket = s;
p_dev->device_no = (s->device_count++);
p_dev->func = function;
p_dev->dev.bus = &pcmcia_bus_type;
p_dev->dev.parent = s->dev.parent;
p_dev->dev.release = pcmcia_release_dev;
bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
if (!p_dev->devname)
goto err_free;
sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
ds_dbg(3, "devname is %s\n", p_dev->devname);
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
/*
* p_dev->function_config must be the same for all card functions.
* Note that this is serialized by the device_add_lock, so that
* only one such struct will be created.
*/
list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
if (p_dev->func == tmp_dev->func) {
p_dev->function_config = tmp_dev->function_config;
kref_get(&p_dev->function_config->ref);
}
/* Add to the list in pcmcia_bus_socket */
list_add(&p_dev->socket_device_list, &s->devices_list);
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
if (!p_dev->function_config) {
ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id);
p_dev->function_config = kzalloc(sizeof(struct config_t),
GFP_KERNEL);
if (!p_dev->function_config)
goto err_unreg;
kref_init(&p_dev->function_config->ref);
}
printk(KERN_NOTICE "pcmcia: registering new device %s\n",
p_dev->devname);
pcmcia_device_query(p_dev);
if (device_register(&p_dev->dev))
goto err_unreg;
mutex_unlock(&device_add_lock);
return p_dev;
err_unreg:
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
list_del(&p_dev->socket_device_list);
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
err_free:
kfree(p_dev->devname);
kfree(p_dev);
s->device_count--;
err_put:
mutex_unlock(&device_add_lock);
pcmcia_put_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)) {
ds_dbg(3, "no resources available, delaying card_add\n");
return -EAGAIN; /* try again, but later... */
}
if (pcmcia_validate_mem(s)) {
ds_dbg(3, "validating mem resources failed, "
"delaying card_add\n");
return -EAGAIN; /* try again, but later... */
}
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;
s->functions = no_funcs;
for (i=0; i < no_funcs; i++)
pcmcia_device_add(s, i);
return (ret);
}
static void pcmcia_delayed_add_device(struct work_struct *work)
{
struct pcmcia_socket *s =
container_of(work, struct pcmcia_socket, device_add);
ds_dbg(1, "adding additional device to %d\n", s->sock);
pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
s->pcmcia_state.device_add_pending = 0;
s->pcmcia_state.mfc_pfc = 0;
}
static int pcmcia_requery(struct device *dev, void * _data)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (!p_dev->dev.driver) {
ds_dbg(1, "update device information for %s\n",
p_dev->dev.bus_id);
pcmcia_device_query(p_dev);
}
return 0;
}
static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
{
int no_devices = 0;
int ret = 0;
unsigned long flags;
/* must be called with skt_mutex held */
ds_dbg(0, "re-scanning socket %d\n", skt->sock);
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
if (list_empty(&skt->devices_list))
no_devices = 1;
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
/* If this is because of a CIS override, start over */
if (new_cis && !no_devices)
pcmcia_card_remove(skt, NULL);
/* if no devices were added for this socket yet because of
* missing resource information or other trouble, we need to
* do this now. */
if (no_devices || new_cis) {
ret = pcmcia_card_add(skt);
if (ret)
return;
}
/* some device information might have changed because of a CIS
* update or because we can finally read it correctly... so
* determine it again, overwriting old values if necessary. */
bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
/* we re-scan all devices, not just the ones connected to this
* socket. This does not matter, though. */
ret = bus_rescan_devices(&pcmcia_bus_type);
if (ret)
printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
}
#ifdef CONFIG_PCMCIA_LOAD_CIS
/**
* pcmcia_load_firmware - load CIS from userspace if device-provided is broken
* @dev - the pcmcia device which needs a CIS override
* @filename - requested filename in /lib/firmware/
*
* This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
* the one provided by the card is broken. The firmware files reside in
* /lib/firmware/ in userspace.
*/
static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
struct pcmcia_socket *s = dev->socket;
const struct firmware *fw;
char path[20];
int ret = -ENOMEM;
int no_funcs;
int old_funcs;
cisdump_t *cis;
cistpl_longlink_mfc_t mfc;
if (!filename)
return -EINVAL;
ds_dbg(1, "trying to load CIS file %s\n", filename);
if (strlen(filename) > 14) {
printk(KERN_WARNING "pcmcia: CIS filename is too long\n");
return -EINVAL;
}
snprintf(path, 20, "%s", filename);
if (request_firmware(&fw, path, &dev->dev) == 0) {
if (fw->size >= CISTPL_MAX_CIS_SIZE) {
ret = -EINVAL;
printk(KERN_ERR "pcmcia: CIS override is too big\n");
goto release;
}
cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
if (!cis) {
ret = -ENOMEM;
goto release;
}
cis->Length = fw->size + 1;
memcpy(cis->Data, fw->data, fw->size);
if (!pcmcia_replace_cis(s, cis))
ret = 0;
else {
printk(KERN_ERR "pcmcia: CIS override failed\n");
goto release;
}
/* update information */
pcmcia_device_query(dev);
/* does this cis override add or remove functions? */
old_funcs = s->functions;
if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
no_funcs = mfc.nfn;
else
no_funcs = 1;
s->functions = no_funcs;
if (old_funcs > no_funcs)
pcmcia_card_remove(s, dev);
else if (no_funcs > old_funcs)
pcmcia_add_device_later(s, 1);
}
release:
release_firmware(fw);
return (ret);
}
#else /* !CONFIG_PCMCIA_LOAD_CIS */
static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
return -ENODEV;
}
#endif
static inline int pcmcia_devmatch(struct pcmcia_device *dev,
struct pcmcia_device_id *did)
{
if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
if ((!dev->has_card_id) || (dev->card_id != did->card_id))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
if (dev->func != did->function)
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
if (!dev->prod_id[0])
return 0;
if (strcmp(did->prod_id[0], dev->prod_id[0]))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
if (!dev->prod_id[1])
return 0;
if (strcmp(did->prod_id[1], dev->prod_id[1]))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
if (!dev->prod_id[2])
return 0;
if (strcmp(did->prod_id[2], dev->prod_id[2]))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
if (!dev->prod_id[3])
return 0;
if (strcmp(did->prod_id[3], dev->prod_id[3]))
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
if (dev->device_no != did->device_no)
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
if ((!dev->has_func_id) || (dev->func_id != did->func_id))
return 0;
/* if this is a pseudo-multi-function device,
* we need explicit matches */
if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
return 0;
if (dev->device_no)
return 0;
/* also, FUNC_ID matching needs to be activated by userspace
* after it has re-checked that there is no possible module
* with a prod_id/manf_id/card_id match.
*/
ds_dbg(0, "skipping FUNC_ID match for %s until userspace "
"interaction\n", dev->dev.bus_id);
if (!dev->allow_func_id_match)
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id);
if (!dev->socket->fake_cis)
pcmcia_load_firmware(dev, did->cisfile);
if (!dev->socket->fake_cis)
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
int i;
for (i=0; i<4; i++)
if (dev->prod_id[i])
return 0;
if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
return 0;
}
dev->dev.driver_data = (void *) did;
return 1;
}
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);
struct pcmcia_device_id *did = p_drv->id_table;
struct pcmcia_dynid *dynid;
/* match dynamic devices first */
spin_lock(&p_drv->dynids.lock);
list_for_each_entry(dynid, &p_drv->dynids.list, node) {
ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
drv->name);
if (pcmcia_devmatch(p_dev, &dynid->id)) {
ds_dbg(0, "matched %s to %s\n", dev->bus_id,
drv->name);
spin_unlock(&p_drv->dynids.lock);
return 1;
}
}
spin_unlock(&p_drv->dynids.lock);
#ifdef CONFIG_PCMCIA_IOCTL
/* matching by cardmgr */
if (p_dev->cardmgr == p_drv) {
ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id,
drv->name);
return 1;
}
#endif
while (did && did->match_flags) {
ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
drv->name);
if (pcmcia_devmatch(p_dev, did)) {
ds_dbg(0, "matched %s to %s\n", dev->bus_id,
drv->name);
return 1;
}
did++;
}
return 0;
}
#ifdef CONFIG_HOTPLUG
static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
struct pcmcia_device *p_dev;
int i, length = 0;
u32 hash[4] = { 0, 0, 0, 0};
if (!dev)
return -ENODEV;
p_dev = to_pcmcia_dev(dev);
/* calculate hashes */
for (i=0; i<4; i++) {
if (!p_dev->prod_id[i])
continue;
hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
}
i = 0;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"SOCKET_NO=%u",
p_dev->socket->sock))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEVICE_NO=%02X",
p_dev->device_no))
return -ENOMEM;
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
"pa%08Xpb%08Xpc%08Xpd%08X",
p_dev->has_manf_id ? p_dev->manf_id : 0,
p_dev->has_card_id ? p_dev->card_id : 0,
p_dev->has_func_id ? p_dev->func_id : 0,
p_dev->func,
p_dev->device_no,
hash[0],
hash[1],
hash[2],
hash[3]))
return -ENOMEM;
envp[i] = NULL;
return 0;
}
#else
static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
return -ENODEV;
}
#endif
/************************ per-device sysfs output ***************************/
#define pcmcia_device_attr(field, test, format) \
static ssize_t field##_show (struct device *dev, struct device_attribute *attr, 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, struct device_attribute *attr, 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 ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (p_dev->suspended)
return sprintf(buf, "off\n");
else
return sprintf(buf, "on\n");
}
static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
int ret = 0;
if (!count)
return -EINVAL;
if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
else if (p_dev->suspended && !strncmp(buf, "on", 2))
dpm_runtime_resume(dev);
return ret ? ret : count;
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
int i;
u32 hash[4] = { 0, 0, 0, 0};
/* calculate hashes */
for (i=0; i<4; i++) {
if (!p_dev->prod_id[i])
continue;
hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
}
return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
"pa%08Xpb%08Xpc%08Xpd%08X\n",
p_dev->has_manf_id ? p_dev->manf_id : 0,
p_dev->has_card_id ? p_dev->card_id : 0,
p_dev->has_func_id ? p_dev->func_id : 0,
p_dev->func, p_dev->device_no,
hash[0], hash[1], hash[2], hash[3]);
}
static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
int ret;
if (!count)
return -EINVAL;
mutex_lock(&p_dev->socket->skt_mutex);
p_dev->allow_func_id_match = 1;
mutex_unlock(&p_dev->socket->skt_mutex);
ret = bus_rescan_devices(&pcmcia_bus_type);
if (ret)
printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
"allowing func_id matches\n");
return count;
}
static struct device_attribute pcmcia_dev_attrs[] = {
__ATTR(function, 0444, func_show, NULL),
__ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
__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_RO(modalias),
__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
__ATTR_NULL,
};
/* PM support, also needed for reset */
static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
struct pcmcia_driver *p_drv = NULL;
int ret = 0;
ds_dbg(2, "suspending %s\n", dev->bus_id);
if (dev->driver)
p_drv = to_pcmcia_drv(dev->driver);
if (!p_drv)
goto out;
if (p_drv->suspend) {
ret = p_drv->suspend(p_dev);
if (ret) {
printk(KERN_ERR "pcmcia: device %s (driver %s) did "
"not want to go to sleep (%d)\n",
p_dev->devname, p_drv->drv.name, ret);
goto out;
}
}
if (p_dev->device_no == p_dev->func) {
ds_dbg(2, "releasing configuration for %s\n", dev->bus_id);
pcmcia_release_configuration(p_dev);
}
out:
if (!ret)
p_dev->suspended = 1;
return ret;
}
static int pcmcia_dev_resume(struct device * dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
struct pcmcia_driver *p_drv = NULL;
int ret = 0;
ds_dbg(2, "resuming %s\n", dev->bus_id);
if (dev->driver)
p_drv = to_pcmcia_drv(dev->driver);
if (!p_drv)
goto out;
if (p_dev->device_no == p_dev->func) {
ds_dbg(2, "requesting configuration for %s\n", dev->bus_id);
ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
if (ret)
goto out;
}
if (p_drv->resume)
ret = p_drv->resume(p_dev);
out:
if (!ret)
p_dev->suspended = 0;
return ret;
}
static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
{
struct pcmcia_socket *skt = _data;
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (p_dev->socket != skt)
return 0;
return dpm_runtime_suspend(dev, PMSG_SUSPEND);
}
static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
{
struct pcmcia_socket *skt = _data;
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (p_dev->socket != skt)
return 0;
dpm_runtime_resume(dev);
return 0;
}
static int pcmcia_bus_resume(struct pcmcia_socket *skt)
{
ds_dbg(2, "resuming socket %d\n", skt->sock);
bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
return 0;
}
static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
{
ds_dbg(2, "suspending socket %d\n", skt->sock);
if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
pcmcia_bus_suspend_callback)) {
pcmcia_bus_resume(skt);
return -EIO;
}
return 0;
}
/*======================================================================
The card status event handler.
======================================================================*/
/* 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_socket *s = pcmcia_get_socket(skt);
if (!s) {
printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
"failed, event 0x%x lost!\n", skt, event);
return -ENODEV;
}
ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
event, priority, skt);
switch (event) {
case CS_EVENT_CARD_REMOVAL:
s->pcmcia_state.present = 0;
pcmcia_card_remove(skt, NULL);
handle_event(skt, event);
break;
case CS_EVENT_CARD_INSERTION:
s->pcmcia_state.present = 1;
pcmcia_card_add(skt);
handle_event(skt, event);
break;
case CS_EVENT_EJECTION_REQUEST:
break;
case CS_EVENT_PM_SUSPEND:
case CS_EVENT_PM_RESUME:
case CS_EVENT_RESET_PHYSICAL:
case CS_EVENT_CARD_RESET:
default:
handle_event(skt, event);
break;
}
pcmcia_put_socket(s);
return 0;
} /* ds_event */
struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
{
struct pcmcia_device *p_dev;
struct pcmcia_device *ret = NULL;
p_dev = pcmcia_get_dev(_p_dev);
if (!p_dev)
return NULL;
if (!p_dev->socket->pcmcia_state.present)
goto out;
if (p_dev->_removed)
goto out;
if (p_dev->suspended)
goto out;
ret = p_dev;
out:
pcmcia_put_dev(p_dev);
return ret;
}
EXPORT_SYMBOL(pcmcia_dev_present);
static struct pcmcia_callback pcmcia_bus_callback = {
.owner = THIS_MODULE,
.event = ds_event,
.requery = pcmcia_bus_rescan,
.suspend = pcmcia_bus_suspend,
.resume = pcmcia_bus_resume,
};
static int __devinit pcmcia_bus_add_socket(struct device *dev,
struct class_interface *class_intf)
{
struct pcmcia_socket *socket = dev_get_drvdata(dev);
int ret;
socket = pcmcia_get_socket(socket);
if (!socket) {
printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
return -ENODEV;
}
/*
* 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);
#ifdef CONFIG_PCMCIA_IOCTL
init_waitqueue_head(&socket->queue);
#endif
INIT_LIST_HEAD(&socket->devices_list);
INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
memset(&socket->pcmcia_state, 0, sizeof(u8));
socket->device_count = 0;
ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
if (ret) {
printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
pcmcia_put_socket(socket);
return (ret);
}
return 0;
}
static void pcmcia_bus_remove_socket(struct device *dev,
struct class_interface *class_intf)
{
struct pcmcia_socket *socket = dev_get_drvdata(dev);
if (!socket)
return;
socket->pcmcia_state.dead = 1;
pccard_register_pcmcia(socket, NULL);
/* unregister any unbound devices */
mutex_lock(&socket->skt_mutex);
pcmcia_card_remove(socket, NULL);
mutex_unlock(&socket->skt_mutex);
pcmcia_put_socket(socket);
return;
}
/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
static struct class_interface pcmcia_bus_interface = {
.class = &pcmcia_socket_class,
.add_dev = &pcmcia_bus_add_socket,
.remove_dev = &pcmcia_bus_remove_socket,
};
struct bus_type pcmcia_bus_type = {
.name = "pcmcia",
.uevent = pcmcia_bus_uevent,
.match = pcmcia_bus_match,
.dev_attrs = pcmcia_dev_attrs,
.probe = pcmcia_device_probe,
.remove = pcmcia_device_remove,
.suspend = pcmcia_dev_suspend,
.resume = pcmcia_dev_resume,
};
static int __init init_pcmcia_bus(void)
{
int ret;
spin_lock_init(&pcmcia_dev_list_lock);
ret = bus_register(&pcmcia_bus_type);
if (ret < 0) {
printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
return ret;
}
ret = class_interface_register(&pcmcia_bus_interface);
if (ret < 0) {
printk(KERN_WARNING
"pcmcia: class_interface_register error: %d\n", ret);
bus_unregister(&pcmcia_bus_type);
return ret;
}
pcmcia_setup_ioctl();
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)
{
pcmcia_cleanup_ioctl();
class_interface_unregister(&pcmcia_bus_interface);
bus_unregister(&pcmcia_bus_type);
}
module_exit(exit_pcmcia_bus);
MODULE_ALIAS("ds");
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