static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct cxacru_data *instance = to_usbatm_driver_data(
to_usb_interface(dev));
int ret;
int poll = -1;
char str_cmd[8];
int len = strlen(buf);
if (!capable(CAP_NET_ADMIN))
return -EACCES;
ret = sscanf(buf, "%7s", str_cmd);
if (ret != 1)
return -EINVAL;
ret = 0;
if (instance == NULL)
return -ENODEV;
if (mutex_lock_interruptible(&instance->adsl_state_serialize))
return -ERESTARTSYS;
if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
if (ret < 0) {
atm_err(instance->usbatm, "change adsl state:"
" CHIP_ADSL_LINE_STOP returned %d\n", ret);
ret = -EIO;
} else {
ret = len;
poll = CXPOLL_STOPPED;
}
}
/* Line status is only updated every second
* and the device appears to only react to
* START/STOP every second too. Wait 1.5s to
* be sure that restart will have an effect. */
if (!strcmp(str_cmd, "restart"))
msleep(1500);
if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
if (ret < 0) {
atm_err(instance->usbatm, "change adsl state:"
" CHIP_ADSL_LINE_START returned %d\n", ret);
ret = -EIO;
} else {
ret = len;
poll = CXPOLL_POLLING;
}
}
if (!strcmp(str_cmd, "poll")) {
ret = len;
poll = CXPOLL_POLLING;
}
if (ret == 0) {
ret = -EINVAL;
poll = -1;
}
if (poll == CXPOLL_POLLING) {
mutex_lock(&instance->poll_state_serialize);
switch (instance->poll_state) {
case CXPOLL_STOPPED:
/* start polling */
instance->poll_state = CXPOLL_POLLING;
break;
case CXPOLL_STOPPING:
/* abort stop request */
instance->poll_state = CXPOLL_POLLING;
case CXPOLL_POLLING:
case CXPOLL_SHUTDOWN:
/* don't start polling */
poll = -1;
}
mutex_unlock(&instance->poll_state_serialize);
} else if (poll == CXPOLL_STOPPED) {
mutex_lock(&instance->poll_state_serialize);
/* request stop */
if (instance->poll_state == CXPOLL_POLLING)
instance->poll_state = CXPOLL_STOPPING;
mutex_unlock(&instance->poll_state_serialize);
}
mutex_unlock(&instance->adsl_state_serialize);
if (poll == CXPOLL_POLLING)
cxacru_poll_status(&instance->poll_work.work);
return ret;
}
static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
struct atm_dev *atm_dev)
{
struct cxacru_data *instance = usbatm_instance->driver_data;
struct usb_interface *intf = usbatm_instance->usb_intf;
int ret;
int start_polling = 1;
dbg("cxacru_atm_start");
/* Read MAC address */
ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
atm_dev->esi, sizeof(atm_dev->esi));
if (ret < 0) {
atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
return ret;
}
#define CXACRU_DEVICE_CREATE_FILE(_name) \
ret = device_create_file(&intf->dev, &dev_attr_##_name); \
if (unlikely(ret)) \
goto fail_sysfs;
CXACRU_ALL_FILES(CREATE);
#undef CXACRU_DEVICE_CREATE_FILE
/* start ADSL */
mutex_lock(&instance->adsl_state_serialize);
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
if (ret < 0)
atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
/* Start status polling */
mutex_lock(&instance->poll_state_serialize);
switch (instance->poll_state) {
case CXPOLL_STOPPED:
/* start polling */
instance->poll_state = CXPOLL_POLLING;
break;
case CXPOLL_STOPPING:
/* abort stop request */
instance->poll_state = CXPOLL_POLLING;
case CXPOLL_POLLING:
case CXPOLL_SHUTDOWN:
/* don't start polling */
start_polling = 0;
}
mutex_unlock(&instance->poll_state_serialize);
mutex_unlock(&instance->adsl_state_serialize);
printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
usbatm_instance->description, atm_dev->esi);
if (start_polling)
cxacru_poll_status(&instance->poll_work.work);
return 0;
fail_sysfs:
usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
cxacru_remove_device_files(usbatm_instance, atm_dev);
return ret;
}