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linux-sg2042/drivers/pcmcia/ds.c

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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 - 2005 Dominik Brodowski
*/
#include <linux/config.h>
#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>
#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;
static int unbind_request(struct pcmcia_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" }
};
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->attach || !p_drv->event || !p_drv->detach)
printk(KERN_DEBUG "pcmcia: %s does misses a callback function",
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;
}
#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/cis/
*
* 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/cis/ 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;
cisdump_t *cis;
if (!filename)
return -EINVAL;
ds_dbg(1, "trying to load firmware %s\n", filename);
if (strlen(filename) > 14)
return -EINVAL;
snprintf(path, 20, "%s", filename);
if (request_firmware(&fw, path, &dev->dev) == 0) {
if (fw->size >= CISTPL_MAX_CIS_SIZE)
goto release;
cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
if (!cis)
goto release;
memset(cis, 0, sizeof(cisdump_t));
cis->Length = fw->size + 1;
memcpy(cis->Data, fw->data, fw->size);
if (!pcmcia_replace_cis(s, cis))
ret = 0;
}
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
/*======================================================================*/
/**
* 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;
pcmcia_check_driver(driver);
/* 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);
/* 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_dev(struct device *dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
ds_dbg(1, "releasing dev %p\n", p_dev);
pcmcia_put_socket(p_dev->socket);
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->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);
struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
{
struct pcmcia_device *p_dev;
unsigned long flags;
s = pcmcia_get_socket(s);
if (!s)
return NULL;
down(&device_add_lock);
/* max of 2 devices per card */
if (s->device_count == 2)
goto err_put;
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;
p_dev->device_no = (s->device_count++);
p_dev->func = function;
p_dev->dev.bus = &pcmcia_bus_type;
p_dev->dev.parent = s->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->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);
pcmcia_device_query(p_dev);
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_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;
for (i=0; i < no_funcs; i++)
pcmcia_device_add(s, i);
return (ret);
}
static void pcmcia_delayed_add_pseudo_device(void *data)
{
struct pcmcia_socket *s = data;
pcmcia_device_add(s, 0);
s->pcmcia_state.device_add_pending = 0;
}
static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
{
if (!s->pcmcia_state.device_add_pending) {
schedule_work(&s->device_add);
s->pcmcia_state.device_add_pending = 1;
}
return;
}
static int pcmcia_requery(struct device *dev, void * _data)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (!p_dev->dev.driver)
pcmcia_device_query(p_dev);
return 0;
}
static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
{
int no_devices=0;
unsigned long flags;
/* must be called with skt_sem held */
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 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) {
int 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. */
bus_rescan_devices(&pcmcia_bus_type);
}
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) {
/* 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.
*/
if (dev->device_no == 0)
pcmcia_add_pseudo_device(dev->socket);
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.
*/
if (!dev->allow_func_id_match)
return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
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;
/* matching by cardmgr */
if (p_dev->cardmgr == p_drv)
return 1;
while (did && did->match_flags) {
if (pcmcia_devmatch(p_dev, did))
return 1;
did++;
}
return 0;
}
#ifdef CONFIG_HOTPLUG
static int pcmcia_bus_hotplug(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_hotplug_env_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"SOCKET_NO=%u",
p_dev->socket->sock))
return -ENOMEM;
if (add_hotplug_env_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEVICE_NO=%02X",
p_dev->device_no))
return -ENOMEM;
if (add_hotplug_env_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_hotplug(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 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);
if (!count)
return -EINVAL;
down(&p_dev->socket->skt_sem);
p_dev->allow_func_id_match = 1;
up(&p_dev->socket->skt_sem);
bus_rescan_devices(&pcmcia_bus_type);
return count;
}
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_RO(modalias),
__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
__ATTR_NULL,
};
/*======================================================================
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 pcmcia_driver *p_drv;
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;
p_drv = to_pcmcia_drv(p_dev->dev.driver);
if (!p_drv)
return 0;
if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
return 0;
if (p_drv->event)
return p_drv->event(data->event, data->priority,
&p_dev->event_callback_args);
return 0;
}
static int send_event(struct pcmcia_socket *s, event_t event, int priority)
{
struct send_event_data private;
private.skt = s;
private.event = event;
private.priority = priority;
return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
} /* 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_socket *s = pcmcia_get_socket(skt);
int ret = 0;
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;
send_event(skt, event, priority);
unbind_request(skt);
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:
ret = send_event(skt, event, priority);
break;
default:
handle_event(skt, event);
send_event(skt, event, priority);
break;
}
pcmcia_put_socket(s);
return 0;
} /* ds_event */
int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
{
struct pcmcia_socket *s = NULL;
struct pcmcia_device *p_dev = NULL;
struct pcmcia_driver *p_drv = 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;
s = pcmcia_get_socket(s);
if (!s)
continue;
spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
p_dev = pcmcia_get_dev(p_dev);
if (!p_dev)
continue;
if (!(p_dev->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)) {
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_socket(s);
}
found:
up_read(&pcmcia_socket_list_rwsem);
if (!p_dev)
return -ENODEV;
pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
*handle = p_dev;
p_dev->state &= ~CLIENT_UNBOUND;
p_dev->event_callback_args = req->event_callback_args;
p_dev->event_callback_args.client_handle = p_dev;
if (!s->functions) {
cistpl_longlink_mfc_t mfc;
if (pccard_read_tuple(s, p_dev->func, 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",
p_dev, p_dev->dev.bus_id);
if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
if (p_drv->event)
p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
&p_dev->event_callback_args);
}
return CS_SUCCESS;
out_no_resource:
pcmcia_put_dev(p_dev);
return CS_OUT_OF_RESOURCE;
} /* register_client */
EXPORT_SYMBOL(pcmcia_register_client);
/* 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_socket *s)
{
struct pcmcia_device *p_dev;
unsigned long flags;
ds_dbg(2, "unbind_request(%d)\n", s->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->state |= CLIENT_STALE;
spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
device_unregister(&p_dev->dev);
}
return 0;
} /* unbind_request */
int pcmcia_deregister_client(struct pcmcia_device *p_dev)
{
struct pcmcia_socket *s;
int i;
s = p_dev->socket;
ds_dbg(1, "deregister_client(%p)\n", p_dev);
if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
goto warn_out;
for (i = 0; i < MAX_WIN; i++)
if (p_dev->state & CLIENT_WIN_REQ(i))
goto warn_out;
if (p_dev->state & CLIENT_STALE) {
p_dev->state &= ~CLIENT_STALE;
pcmcia_put_dev(p_dev);
} else {
p_dev->state = CLIENT_UNBOUND;
}
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);
static struct pcmcia_callback pcmcia_bus_callback = {
.owner = THIS_MODULE,
.event = ds_event,
.requery = pcmcia_bus_rescan,
};
static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
{
struct pcmcia_socket *socket = class_get_devdata(class_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_pseudo_device, socket);
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 class_device *class_dev)
{
struct pcmcia_socket *socket = class_get_devdata(class_dev);
if (!socket)
return;
socket->pcmcia_state.dead = 1;
pccard_register_pcmcia(socket, NULL);
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 = &pcmcia_bus_add_socket,
.remove = &pcmcia_bus_remove_socket,
};
struct bus_type pcmcia_bus_type = {
.name = "pcmcia",
.hotplug = pcmcia_bus_hotplug,
.match = pcmcia_bus_match,
.dev_attrs = pcmcia_dev_attrs,
};
static int __init init_pcmcia_bus(void)
{
spin_lock_init(&pcmcia_dev_list_lock);
bus_register(&pcmcia_bus_type);
class_interface_register(&pcmcia_bus_interface);
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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