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linux/drivers/pcmcia/ds.c
Alan Cox cec5eb7be3 pcmcia: Fix broken abuse of dev->driver_data 
PCMCIA abuses dev->private_data in the probe methods. Unfortunately it
continues to abuse it after calling drv->probe() which leads to crashes and
other nasties (such as bogus probes of multifunction devices) giving errors like

pcmcia: registering new device pcmcia0.1
kernel: 0.1: GetNextTuple: No more items

Extract the passed data before calling the driver probe function that way
we don't blow up when the driver reuses dev->private_data as its right.

As its close to the final release just move the hack so it works out,
hopefully someone will be sufficiently embarrassed to produce a nice rework
for 2.6.28.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-22 08:42:50 -07:00

1584 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>
#include <linux/dma-mapping.h>
#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 = driver_create_file(&drv->drv, &driver_attr_new_id);
return error;
}
/**
* pcmcia_register_driver - register a PCMCIA driver with the bus core
* @driver: the &driver being registered
*
* 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
* @driver: the &driver being unregistered
*/
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;
/* The PCMCIA code passes the match data in via dev->driver_data
* which is an ugly hack. Once the driver probe is called it may
* and often will overwrite the match data so we must save it first
*
* 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;
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;
}
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;
/* by default don't allow DMA */
p_dev->dma_mask = DMA_MASK_NONE;
p_dev->dev.dma_mask = &p_dev->dma_mask;
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)
{
cistpl_longlink_mfc_t mfc;
unsigned int no_funcs, i, no_chains;
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, &no_chains);
if (ret || !no_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[FIRMWARE_NAME_MAX];
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) > (FIRMWARE_NAME_MAX - 1)) {
printk(KERN_WARNING "pcmcia: CIS filename is too long [%s]\n",
filename);
return -EINVAL;
}
snprintf(path, sizeof(path), "%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, struct kobj_uevent_env *env)
{
struct pcmcia_device *p_dev;
int i;
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]));
}
if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
return -ENOMEM;
if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
return -ENOMEM;
if (add_uevent_var(env, "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;
return 0;
}
#else
static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}
#endif
/************************ runtime PM support ***************************/
static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
static int pcmcia_dev_resume(struct device *dev);
static int runtime_suspend(struct device *dev)
{
int rc;
down(&dev->sem);
rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
up(&dev->sem);
return rc;
}
static void runtime_resume(struct device *dev)
{
int rc;
down(&dev->sem);
rc = pcmcia_dev_resume(dev);
up(&dev->sem);
}
/************************ 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 = runtime_suspend(dev);
else if (p_dev->suspended && !strncmp(buf, "on", 2))
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;
if (p_dev->suspended)
return 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;
if (!p_dev->suspended)
return 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 || p_dev->suspended)
return 0;
return runtime_suspend(dev);
}
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 || !p_dev->suspended)
return 0;
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 __refdata = {
.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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