android_kernel_xiaomi_sm8350/drivers/pcmcia/ds.c
Kay Sievers 312c004d36 [PATCH] driver core: replace "hotplug" by "uevent"
Leave the overloaded "hotplug" word to susbsystems which are handling
real devices. The driver core does not "plug" anything, it just exports
the state to userspace and generates events.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-04 16:18:08 -08:00

1259 lines
31 KiB
C

/*
* 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 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;
}
#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->devname);
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;
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 < 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);
}
}
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 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;
int bus_id_len;
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;
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);
/* 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);
printk(KERN_NOTICE "pcmcia: registering new device %s\n",
p_dev->devname);
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->devname);
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) {
s->pcmcia_state.device_add_pending = 1;
schedule_work(&s->device_add);
}
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_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 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 class_interface *class_intf)
{
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 class_interface *class_intf)
{
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",
.uevent = pcmcia_bus_uevent,
.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");