529 lines
15 KiB
C
529 lines
15 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <usb.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include "usb-driver.h"
|
|
#include "xpcu.h"
|
|
|
|
struct xpcu_s {
|
|
struct usb_device *dev;
|
|
usb_dev_handle *handle;
|
|
int interface;
|
|
int alternate;
|
|
unsigned long card_type;
|
|
};
|
|
|
|
struct xpcu_event_s {
|
|
struct xpcu_s *xpcu;
|
|
int count;
|
|
int interrupt_count;
|
|
pthread_mutex_t interrupt;
|
|
};
|
|
|
|
static struct usb_bus *busses = NULL;
|
|
static pthread_mutex_t dummy_interrupt = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
int xpcu_deviceinfo(struct usb_get_device_data *ugdd) {
|
|
struct xpcu_s *xpcu = (struct xpcu_s*)ugdd->dwUniqueID;
|
|
int i,j,k,l;
|
|
int len = 0;
|
|
unsigned char *buf = NULL;
|
|
WDU_CONFIGURATION **pConfigs, **pActiveConfig;
|
|
WDU_INTERFACE **pActiveInterface;
|
|
|
|
if (!xpcu)
|
|
return -ENODEV;
|
|
|
|
if (ugdd->dwBytes)
|
|
buf = ugdd->pBuf;
|
|
|
|
if (buf) {
|
|
struct usb_device_info *udi = (struct usb_device_info*)(buf+len);
|
|
|
|
udi->Descriptor.bLength = sizeof(WDU_DEVICE_DESCRIPTOR);
|
|
udi->Descriptor.bDescriptorType = xpcu->dev->descriptor.bDescriptorType;
|
|
udi->Descriptor.bcdUSB = xpcu->dev->descriptor.bcdUSB;
|
|
udi->Descriptor.bDeviceClass = xpcu->dev->descriptor.bDeviceClass;
|
|
udi->Descriptor.bDeviceSubClass = xpcu->dev->descriptor.bDeviceSubClass;
|
|
udi->Descriptor.bDeviceProtocol = xpcu->dev->descriptor.bDeviceProtocol;
|
|
udi->Descriptor.bMaxPacketSize0 = xpcu->dev->descriptor.bMaxPacketSize0;
|
|
udi->Descriptor.idVendor = xpcu->dev->descriptor.idVendor;
|
|
udi->Descriptor.idProduct = xpcu->dev->descriptor.idProduct;
|
|
udi->Descriptor.bcdDevice = xpcu->dev->descriptor.bcdDevice;
|
|
udi->Descriptor.iManufacturer = xpcu->dev->descriptor.iManufacturer;
|
|
udi->Descriptor.iProduct = xpcu->dev->descriptor.iProduct;
|
|
udi->Descriptor.iSerialNumber = xpcu->dev->descriptor.iSerialNumber;
|
|
udi->Descriptor.bNumConfigurations = xpcu->dev->descriptor.bNumConfigurations;
|
|
|
|
/* TODO: Fix Pipe0! */
|
|
udi->Pipe0.dwNumber = 0x00;
|
|
udi->Pipe0.dwMaximumPacketSize = xpcu->dev->descriptor.bMaxPacketSize0;
|
|
udi->Pipe0.type = 0;
|
|
udi->Pipe0.direction = WDU_DIR_IN_OUT;
|
|
udi->Pipe0.dwInterval = 0;
|
|
|
|
pConfigs = &(udi->pConfigs);
|
|
pActiveConfig = &(udi->pActiveConfig);
|
|
pActiveInterface = &(udi->pActiveInterface[0]);
|
|
}
|
|
|
|
len = sizeof(struct usb_device_info);
|
|
|
|
for (i=0; i<xpcu->dev->descriptor.bNumConfigurations; i++)
|
|
{
|
|
struct usb_config_descriptor *conf_desc = &xpcu->dev->config[i];
|
|
WDU_INTERFACE **pInterfaces;
|
|
WDU_ALTERNATE_SETTING **pAlternateSettings[conf_desc->bNumInterfaces];
|
|
WDU_ALTERNATE_SETTING **pActiveAltSetting[conf_desc->bNumInterfaces];
|
|
|
|
if (buf) {
|
|
WDU_CONFIGURATION *cfg = (WDU_CONFIGURATION*)(buf+len);
|
|
|
|
*pConfigs = cfg;
|
|
*pActiveConfig = cfg;
|
|
|
|
cfg->Descriptor.bLength = conf_desc->bLength;
|
|
cfg->Descriptor.bDescriptorType = conf_desc->bDescriptorType;
|
|
cfg->Descriptor.wTotalLength = conf_desc->wTotalLength;
|
|
cfg->Descriptor.bNumInterfaces = conf_desc->bNumInterfaces;
|
|
cfg->Descriptor.bConfigurationValue = conf_desc->bConfigurationValue;
|
|
cfg->Descriptor.iConfiguration = conf_desc->iConfiguration;
|
|
cfg->Descriptor.bmAttributes = conf_desc->bmAttributes;
|
|
cfg->Descriptor.MaxPower = conf_desc->MaxPower;
|
|
|
|
cfg->dwNumInterfaces = conf_desc->bNumInterfaces;
|
|
|
|
pInterfaces = &(cfg->pInterfaces);
|
|
}
|
|
len += sizeof(WDU_CONFIGURATION);
|
|
|
|
if (buf) {
|
|
*pInterfaces = (WDU_INTERFACE*)(buf+len);
|
|
for (j=0; j<conf_desc->bNumInterfaces; j++) {
|
|
WDU_INTERFACE *iface = (WDU_INTERFACE*)(buf+len);
|
|
|
|
pActiveInterface[j] = iface;
|
|
|
|
pAlternateSettings[j] = &(iface->pAlternateSettings);
|
|
iface->dwNumAltSettings = xpcu->dev->config[i].interface[j].num_altsetting;
|
|
pActiveAltSetting[j] = &(iface->pActiveAltSetting);
|
|
|
|
len += sizeof(WDU_INTERFACE);
|
|
}
|
|
} else {
|
|
len += sizeof(WDU_INTERFACE) * conf_desc->bNumInterfaces;
|
|
}
|
|
|
|
for (j=0; j<conf_desc->bNumInterfaces; j++)
|
|
{
|
|
struct usb_interface *interface = &xpcu->dev->config[i].interface[j];
|
|
|
|
if (buf) {
|
|
*pAlternateSettings[j] = (WDU_ALTERNATE_SETTING*)(buf+len);
|
|
/* FIXME: */
|
|
*pActiveAltSetting[j] = (WDU_ALTERNATE_SETTING*)(buf+len);
|
|
}
|
|
|
|
for(k=0; k<interface->num_altsetting; k++)
|
|
{
|
|
unsigned char bNumEndpoints = interface->altsetting[k].bNumEndpoints;
|
|
WDU_ENDPOINT_DESCRIPTOR **pEndpointDescriptors;
|
|
WDU_PIPE_INFO **pPipes;
|
|
|
|
if (buf) {
|
|
WDU_ALTERNATE_SETTING *altset = (WDU_ALTERNATE_SETTING*)(buf+len);
|
|
|
|
altset->Descriptor.bLength = interface->altsetting[k].bLength;
|
|
altset->Descriptor.bDescriptorType = interface->altsetting[k].bDescriptorType;
|
|
altset->Descriptor.bInterfaceNumber = interface->altsetting[k].bInterfaceNumber;
|
|
altset->Descriptor.bAlternateSetting = interface->altsetting[k].bAlternateSetting;
|
|
altset->Descriptor.bNumEndpoints = interface->altsetting[k].bNumEndpoints;
|
|
altset->Descriptor.bInterfaceClass = interface->altsetting[k].bInterfaceClass;
|
|
altset->Descriptor.bInterfaceSubClass = interface->altsetting[k].bInterfaceSubClass;
|
|
altset->Descriptor.bInterfaceProtocol = interface->altsetting[k].bInterfaceProtocol;
|
|
altset->Descriptor.iInterface = interface->altsetting[k].iInterface;
|
|
pEndpointDescriptors = &(altset->pEndpointDescriptors);
|
|
pPipes = &(altset->pPipes);
|
|
|
|
}
|
|
len +=sizeof(WDU_ALTERNATE_SETTING);
|
|
|
|
if (buf) {
|
|
*pEndpointDescriptors = (WDU_ENDPOINT_DESCRIPTOR*)(buf+len);
|
|
for (l = 0; l < bNumEndpoints; l++) {
|
|
WDU_ENDPOINT_DESCRIPTOR *ed = (WDU_ENDPOINT_DESCRIPTOR*)(buf+len);
|
|
|
|
ed->bLength = interface->altsetting[k].endpoint[l].bLength;
|
|
ed->bDescriptorType = interface->altsetting[k].endpoint[l].bDescriptorType;
|
|
ed->bEndpointAddress = interface->altsetting[k].endpoint[l].bEndpointAddress;
|
|
ed->bmAttributes = interface->altsetting[k].endpoint[l].bmAttributes;
|
|
ed->wMaxPacketSize = interface->altsetting[k].endpoint[l].wMaxPacketSize;
|
|
ed->bInterval = interface->altsetting[k].endpoint[l].bInterval;
|
|
|
|
len += sizeof(WDU_ENDPOINT_DESCRIPTOR);
|
|
}
|
|
|
|
*pPipes = (WDU_PIPE_INFO*)(buf+len);
|
|
for (l = 0; l < bNumEndpoints; l++) {
|
|
WDU_PIPE_INFO *pi = (WDU_PIPE_INFO*)(buf+len);
|
|
|
|
pi->dwNumber = interface->altsetting[k].endpoint[l].bEndpointAddress;
|
|
pi->dwMaximumPacketSize = WDU_GET_MAX_PACKET_SIZE(interface->altsetting[k].endpoint[l].wMaxPacketSize);
|
|
pi->type = interface->altsetting[k].endpoint[l].bmAttributes & USB_ENDPOINT_TYPE_MASK;
|
|
if (pi->type == PIPE_TYPE_CONTROL)
|
|
pi->direction = WDU_DIR_IN_OUT;
|
|
else
|
|
{
|
|
pi->direction = interface->altsetting[k].endpoint[l].bEndpointAddress & USB_ENDPOINT_DIR_MASK ? WDU_DIR_IN : WDU_DIR_OUT;
|
|
}
|
|
|
|
pi->dwInterval = interface->altsetting[k].endpoint[l].bInterval;
|
|
|
|
len += sizeof(WDU_PIPE_INFO);
|
|
}
|
|
} else {
|
|
len +=(sizeof(WDU_ENDPOINT_DESCRIPTOR)+sizeof(WDU_PIPE_INFO))*bNumEndpoints;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ugdd->dwBytes = len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xpcu_claim(struct xpcu_s *xpcu, int claim) {
|
|
int ret = 0;
|
|
static int claimed = 0;
|
|
|
|
if (xpcu->interface < 0)
|
|
return -1;
|
|
|
|
if (claim == XPCU_CLAIM) {
|
|
if (claimed)
|
|
return 0;
|
|
|
|
ret = usb_claim_interface(xpcu->handle, xpcu->interface);
|
|
if (!ret) {
|
|
claimed = 1;
|
|
ret = usb_set_altinterface(xpcu->handle, xpcu->alternate);
|
|
if (ret)
|
|
fprintf(stderr, "usb_set_altinterface: %d\n", ret);
|
|
} else {
|
|
fprintf(stderr, "usb_claim_interface: %d -> %d (%s)\n",
|
|
xpcu->interface, ret, usb_strerror());
|
|
}
|
|
} else {
|
|
if (!claimed)
|
|
return 0;
|
|
|
|
ret = usb_release_interface(xpcu->handle, xpcu->interface);
|
|
if (!ret)
|
|
claimed = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int xpcu_transfer(struct usb_transfer *ut) {
|
|
struct xpcu_s *xpcu = (struct xpcu_s*)ut->dwUniqueID;
|
|
int ret = 0;
|
|
|
|
if (!xpcu)
|
|
return -ENODEV;
|
|
|
|
xpcu_claim(xpcu, XPCU_CLAIM);
|
|
/* http://www.jungo.com/support/documentation/windriver/802/wdusb_man_mhtml/node55.html#SECTION001213000000000000000 */
|
|
if (ut->dwPipeNum == 0) { /* control pipe */
|
|
int requesttype, request, value, index, size;
|
|
requesttype = ut->SetupPacket[0];
|
|
request = ut->SetupPacket[1];
|
|
value = ut->SetupPacket[2] | (ut->SetupPacket[3] << 8);
|
|
index = ut->SetupPacket[4] | (ut->SetupPacket[5] << 8);
|
|
size = ut->SetupPacket[6] | (ut->SetupPacket[7] << 8);
|
|
DPRINTF("-> requesttype: %x, request: %x, value: %u, index: %u, size: %u\n", requesttype, request, value, index, size);
|
|
ret = usb_control_msg(xpcu->handle, requesttype, request, value, index, ut->pBuffer, size, ut->dwTimeout);
|
|
} else {
|
|
if (ut->fRead) {
|
|
ret = usb_bulk_read(xpcu->handle, ut->dwPipeNum, ut->pBuffer, ut->dwBufferSize, ut->dwTimeout);
|
|
} else {
|
|
ret = usb_bulk_write(xpcu->handle, ut->dwPipeNum, ut->pBuffer, ut->dwBufferSize, ut->dwTimeout);
|
|
}
|
|
xpcu_claim(xpcu, XPCU_RELEASE);
|
|
}
|
|
|
|
if (ret < 0) {
|
|
fprintf(stderr, "usb_transfer: %d (%s)\n", ret, usb_strerror());
|
|
} else {
|
|
ut->dwBytesTransferred = ret;
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int xpcu_set_interface(struct usb_set_interface *usi) {
|
|
struct xpcu_s *xpcu = (struct xpcu_s*)usi->dwUniqueID;
|
|
|
|
if (!xpcu)
|
|
return -ENODEV;
|
|
|
|
if (xpcu->dev) {
|
|
if (!xpcu->handle) {
|
|
xpcu->handle = usb_open(xpcu->dev);
|
|
#ifndef NO_USB_RESET
|
|
if (xpcu->handle) {
|
|
usb_reset(xpcu->handle);
|
|
xpcu->handle = usb_open(xpcu->dev);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
xpcu->interface = xpcu->dev->config[0].interface[usi->dwInterfaceNum].altsetting[usi->dwAlternateSetting].bInterfaceNumber;
|
|
xpcu->alternate = usi->dwAlternateSetting;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xpcu_init(void) {
|
|
if (busses)
|
|
return;
|
|
|
|
usb_init();
|
|
usb_find_busses();
|
|
usb_find_devices();
|
|
|
|
busses = usb_get_busses();
|
|
}
|
|
|
|
|
|
int xpcu_find(struct event *e) {
|
|
struct xpcu_event_s *xpcu_event = NULL;
|
|
struct xpcu_s *xpcu = NULL;
|
|
char* usbdev;
|
|
struct usb_bus *bus;
|
|
int busnum = -1, devnum = -1;
|
|
int i;
|
|
|
|
e->handle = (unsigned long)NULL;
|
|
|
|
xpcu_init();
|
|
|
|
usbdev = getenv("XILINX_USB_DEV");
|
|
if (usbdev != NULL) {
|
|
int j;
|
|
char *devstr = NULL, *remainder;
|
|
char *devpos;
|
|
|
|
devpos = strdup(usbdev);
|
|
if (!devpos)
|
|
return -ENOMEM;
|
|
|
|
DPRINTF("XILINX_USB_DEV=%s\n", devpos);
|
|
|
|
for (j = 0; j < strlen(devpos) && devpos[j] != 0; j++) {
|
|
if (devpos[j] == ':') {
|
|
devpos[j] = 0;
|
|
devstr = &(devpos[j+1]);
|
|
}
|
|
}
|
|
|
|
if (devstr && strlen(devstr) > 0) {
|
|
busnum = strtol(devpos, &remainder, 10);
|
|
if (devpos == remainder) {
|
|
busnum = -1;
|
|
} else {
|
|
devnum = strtol(devstr, &remainder, 10);
|
|
if (devstr == remainder) {
|
|
busnum = -1;
|
|
devnum = -1;
|
|
} else {
|
|
fprintf(stderr,"Using XILINX platform cable USB at %03d:%03d\n",
|
|
busnum, devnum);
|
|
}
|
|
}
|
|
}
|
|
free(devpos);
|
|
}
|
|
|
|
xpcu_event = malloc(sizeof(struct xpcu_event_s));
|
|
if (!xpcu_event)
|
|
return -ENOMEM;
|
|
|
|
bzero(xpcu_event, sizeof(struct xpcu_event_s));
|
|
xpcu_event->xpcu = NULL;
|
|
xpcu_event->count = 0;
|
|
xpcu_event->interrupt_count = 0;
|
|
pthread_mutex_init(&xpcu_event->interrupt, NULL);
|
|
|
|
for (i = 0; i < e->dwNumMatchTables; i++) {
|
|
|
|
DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
|
|
e->matchTables[i].VendorId,
|
|
e->matchTables[i].ProductId,
|
|
e->matchTables[i].bDeviceClass,
|
|
e->matchTables[i].bDeviceSubClass,
|
|
e->matchTables[i].bInterfaceClass,
|
|
e->matchTables[i].bInterfaceSubClass,
|
|
e->matchTables[i].bInterfaceProtocol);
|
|
|
|
for (bus = busses; bus; bus = bus->next) {
|
|
struct usb_device *dev;
|
|
|
|
if ((devnum != -1) && (strtol(bus->dirname, NULL, 10) != busnum))
|
|
continue;
|
|
|
|
for (dev = bus->devices; dev; dev = dev->next) {
|
|
struct usb_device_descriptor *desc = &(dev->descriptor);
|
|
|
|
if((desc->idVendor == e->matchTables[i].VendorId) &&
|
|
(desc->idProduct == e->matchTables[i].ProductId) &&
|
|
(desc->bDeviceClass == e->matchTables[i].bDeviceClass) &&
|
|
(desc->bDeviceSubClass == e->matchTables[i].bDeviceSubClass) &&
|
|
((devnum == -1) || (strtol(dev->filename, NULL, 10) == devnum)) ) {
|
|
int ac;
|
|
for (ac = 0; ac < desc->bNumConfigurations; ac++) {
|
|
struct usb_interface *interface = dev->config[ac].interface;
|
|
int ai;
|
|
|
|
for (ai = 0; ai < interface->num_altsetting; ai++) {
|
|
|
|
DPRINTF("intclass: %x, intsubclass: %x, intproto: %x\n",
|
|
interface->altsetting[i].bInterfaceClass,
|
|
interface->altsetting[i].bInterfaceSubClass,
|
|
interface->altsetting[i].bInterfaceProtocol);
|
|
|
|
if ((interface->altsetting[ai].bInterfaceSubClass == e->matchTables[i].bInterfaceSubClass) &&
|
|
(interface->altsetting[ai].bInterfaceProtocol == e->matchTables[i].bInterfaceProtocol)){
|
|
int n = xpcu_event->count;
|
|
|
|
/* TODO: check interfaceClass! */
|
|
DPRINTF("found device with libusb\n");
|
|
|
|
xpcu = realloc(xpcu, sizeof(struct xpcu_s) * (++xpcu_event->count));
|
|
if (!xpcu) {
|
|
free(xpcu_event);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bzero(&(xpcu[n]), sizeof(struct xpcu_s));
|
|
xpcu[n].interface = -1;
|
|
xpcu[n].alternate = -1;
|
|
xpcu[n].dev = dev;
|
|
xpcu[n].card_type = e->dwCardType;
|
|
|
|
xpcu_event->xpcu = xpcu;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
e->handle = (unsigned long)xpcu_event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int xpcu_found(struct event *e) {
|
|
struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)e->handle;
|
|
struct xpcu_s *xpcu = NULL;
|
|
|
|
if (xpcu_event && xpcu_event->count && (xpcu_event->interrupt_count <= xpcu_event->count))
|
|
xpcu = &(xpcu_event->xpcu[xpcu_event->interrupt_count-1]);
|
|
|
|
if (xpcu && xpcu->dev) {
|
|
struct usb_interface *interface = xpcu->dev->config->interface;
|
|
|
|
e->dwCardType = xpcu->card_type;
|
|
e->dwAction = 1;
|
|
e->dwEventId = 1;
|
|
e->u.Usb.dwUniqueID = (unsigned long)xpcu;
|
|
e->matchTables[0].VendorId = xpcu->dev->descriptor.idVendor;
|
|
e->matchTables[0].ProductId = xpcu->dev->descriptor.idProduct;
|
|
e->matchTables[0].bDeviceClass = xpcu->dev->descriptor.bDeviceClass;
|
|
e->matchTables[0].bDeviceSubClass = xpcu->dev->descriptor.bDeviceSubClass;
|
|
e->matchTables[0].bInterfaceClass = interface->altsetting[0].bInterfaceClass;
|
|
e->matchTables[0].bInterfaceSubClass = interface->altsetting[0].bInterfaceSubClass;
|
|
e->matchTables[0].bInterfaceProtocol = interface->altsetting[0].bInterfaceProtocol;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int xpcu_close(struct event *e) {
|
|
struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)e->handle;
|
|
|
|
if (!xpcu_event)
|
|
return -ENODEV;
|
|
|
|
if(xpcu_event) {
|
|
struct xpcu_s *xpcu;
|
|
int i;
|
|
|
|
for (i = 0; i < xpcu_event->count; i++) {
|
|
xpcu = &(xpcu_event->xpcu[i]);
|
|
if (xpcu->handle) {
|
|
xpcu_claim(xpcu, XPCU_RELEASE);
|
|
usb_close(xpcu->handle);
|
|
}
|
|
}
|
|
|
|
if (xpcu_event->xpcu)
|
|
free(xpcu_event->xpcu);
|
|
|
|
busses = NULL;
|
|
free(xpcu_event);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int xpcu_int_state(struct interrupt *it, int enable) {
|
|
struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)it->hInterrupt;
|
|
pthread_mutex_t *interrupt = &dummy_interrupt;
|
|
|
|
if (xpcu_event)
|
|
interrupt = &xpcu_event->interrupt;
|
|
|
|
if (enable == ENABLE_INTERRUPT) {
|
|
it->fEnableOk = 1;
|
|
it->fStopped = 0;
|
|
it->dwCounter = 0;
|
|
pthread_mutex_trylock(interrupt);
|
|
} else {
|
|
it->dwCounter = 0;
|
|
it->fStopped = 1;
|
|
if (pthread_mutex_trylock(interrupt) == EBUSY)
|
|
pthread_mutex_unlock(interrupt);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int xpcu_int_wait(struct interrupt *it) {
|
|
struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)it->hInterrupt;
|
|
|
|
if (xpcu_event) {
|
|
if (it->dwCounter < xpcu_event->count) {
|
|
it->dwCounter++;
|
|
} else {
|
|
pthread_mutex_lock(&xpcu_event->interrupt);
|
|
pthread_mutex_unlock(&xpcu_event->interrupt);
|
|
}
|
|
xpcu_event->interrupt_count++;
|
|
} else {
|
|
pthread_mutex_lock(&dummy_interrupt);
|
|
pthread_mutex_unlock(&dummy_interrupt);
|
|
}
|
|
|
|
return 0;
|
|
}
|