static int speedtch_start_synchro(struct speedtch_instance_data *instance)
{
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
unsigned char *buf = instance->scratch_buffer;
int ret;
atm_dbg(usbatm, "%s entered\n", __func__);
memset(buf, 0, 2);
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x04, 0x00,
buf, 2, CTRL_TIMEOUT);
if (ret < 0)
atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
else
atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
__func__, ret, buf[0], buf[1]);
return ret;
}
static void speedtch_check_status(struct speedtch_instance_data *instance)
{
struct usbatm_data *usbatm = instance->usbatm;
struct atm_dev *atm_dev = usbatm->atm_dev;
unsigned char *buf = instance->scratch_buffer;
int down_speed, up_speed, ret;
unsigned char status;
#ifdef VERBOSE_DEBUG
atm_dbg(usbatm, "%s entered\n", __func__);
#endif
ret = speedtch_read_status(instance);
if (ret < 0) {
atm_warn(usbatm, "error %d fetching device status\n", ret);
instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
return;
}
instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
status = buf[OFFSET_7];
if ((status != instance->last_status) || !status) {
atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status);
switch (status) {
case 0:
atm_dev->signal = ATM_PHY_SIG_LOST;
if (instance->last_status)
atm_info(usbatm, "ADSL line is down\n");
/* It may never resync again unless we ask it to... */
ret = speedtch_start_synchro(instance);
break;
case 0x08:
atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
atm_info(usbatm, "ADSL line is blocked?\n");
break;
case 0x10:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line is synchronising\n");
break;
case 0x20:
down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
| (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
| (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) {
down_speed >>= 16;
up_speed >>= 16;
}
atm_dev->link_rate = down_speed * 1000 / 424;
atm_dev->signal = ATM_PHY_SIG_FOUND;
atm_info(usbatm,
"ADSL line is up (%d kb/s down | %d kb/s up)\n",
down_speed, up_speed);
break;
default:
atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
atm_info(usbatm, "unknown line state %02x\n", status);
break;
}
static void cxacru_poll_status(struct work_struct *work)
{
struct cxacru_data *instance =
container_of(work, struct cxacru_data, poll_work.work);
u32 buf[CXINF_MAX] = {};
struct usbatm_data *usbatm = instance->usbatm;
struct atm_dev *atm_dev = usbatm->atm_dev;
int keep_polling = 1;
int ret;
ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
if (ret < 0) {
if (ret != -ESHUTDOWN)
atm_warn(usbatm, "poll status: error %d\n", ret);
mutex_lock(&instance->poll_state_serialize);
if (instance->poll_state != CXPOLL_SHUTDOWN) {
instance->poll_state = CXPOLL_STOPPED;
if (ret != -ESHUTDOWN)
atm_warn(usbatm, "polling disabled, set adsl_state"
" to 'start' or 'poll' to resume\n");
}
mutex_unlock(&instance->poll_state_serialize);
goto reschedule;
}
memcpy(instance->card_info, buf, sizeof(instance->card_info));
if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
instance->adsl_status = buf[CXINF_LINE_STARTABLE];
switch (instance->adsl_status) {
case 0:
atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
break;
case 1:
atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
break;
default:
atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
break;
}
}
if (instance->line_status == buf[CXINF_LINE_STATUS])
goto reschedule;
instance->line_status = buf[CXINF_LINE_STATUS];
switch (instance->line_status) {
case 0:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: down\n");
break;
case 1:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: attempting to activate\n");
break;
case 2:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: training\n");
break;
case 3:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: channel analysis\n");
break;
case 4:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: exchange\n");
break;
case 5:
atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
atm_dev->signal = ATM_PHY_SIG_FOUND;
atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
break;
case 6:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: waiting\n");
break;
case 7:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: initializing\n");
break;
default:
atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
break;
}
reschedule:
mutex_lock(&instance->poll_state_serialize);
if (instance->poll_state == CXPOLL_STOPPING &&
instance->adsl_status == 1 && /* stopped */
instance->line_status == 0) /* down */
instance->poll_state = CXPOLL_STOPPED;
if (instance->poll_state == CXPOLL_STOPPED)
keep_polling = 0;
mutex_unlock(&instance->poll_state_serialize);
if (keep_polling)
schedule_delayed_work(&instance->poll_work,
round_jiffies_relative(POLL_INTERVAL*HZ));
}
