/*
* Store a new CHID.
*
* - Write an all zeros CHID and it will stop the controller
* - Write a non-zero CHID and it will start it.
*
* See wusbhc_chid_set() for more info.
*/
static ssize_t wusb_chid_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
struct wusb_ckhdid chid;
ssize_t result;
result = sscanf(buf,
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx\n",
&chid.data[0] , &chid.data[1] ,
&chid.data[2] , &chid.data[3] ,
&chid.data[4] , &chid.data[5] ,
&chid.data[6] , &chid.data[7] ,
&chid.data[8] , &chid.data[9] ,
&chid.data[10], &chid.data[11],
&chid.data[12], &chid.data[13],
&chid.data[14], &chid.data[15]);
if (result != 16) {
dev_err(dev, "Unrecognized CHID (need 16 8-bit hex digits): "
"%d\n", (int)result);
return -EINVAL;
}
result = wusbhc_chid_set(wusbhc, &chid);
return result < 0 ? result : size;
}
/*
* Show & store the current WUSB trust timeout
*
* We don't do locking--it is an 'atomic' value.
*
* The units that we store/show are always MILLISECONDS. However, the
* value of trust_timeout is jiffies.
*/
static ssize_t wusb_trust_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
return scnprintf(buf, PAGE_SIZE, "%u\n", wusbhc->trust_timeout);
}
static ssize_t wusb_phy_rate_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
return sprintf(buf, "%d\n", wusbhc->phy_rate);
}
static ssize_t wusb_retry_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
return sprintf(buf, "%d\n", wusbhc->retry_count);
}
static ssize_t wusb_dnts_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
return sprintf(buf, "num slots: %d\ninterval: %dms\n",
wusbhc->dnts_num_slots, wusbhc->dnts_interval);
}
/*
* Show the current WUSB CHID.
*/
static ssize_t wusb_chid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
const struct wusb_ckhdid *chid;
ssize_t result = 0;
if (wusbhc->wuie_host_info != NULL)
chid = &wusbhc->wuie_host_info->CHID;
else
chid = &wusb_ckhdid_zero;
result += ckhdid_printf(buf, PAGE_SIZE, chid);
result += sprintf(buf + result, "\n");
return result;
}
static ssize_t wusb_phy_rate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
uint8_t phy_rate;
ssize_t result;
result = sscanf(buf, "%hhu", &phy_rate);
if (result != 1)
return -EINVAL;
if (phy_rate >= UWB_PHY_RATE_INVALID)
return -EINVAL;
wusbhc->phy_rate = phy_rate;
return size;
}
static ssize_t wusb_retry_count_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
uint8_t retry_count;
ssize_t result;
result = sscanf(buf, "%hhu", &retry_count);
if (result != 1)
return -EINVAL;
wusbhc->retry_count = max_t(uint8_t, retry_count,
WUSB_RETRY_COUNT_MAX);
return size;
}
static ssize_t wusb_dnts_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
uint8_t num_slots, interval;
ssize_t result;
result = sscanf(buf, "%hhu %hhu", &num_slots, &interval);
if (result != 2)
return -EINVAL;
wusbhc->dnts_num_slots = num_slots;
wusbhc->dnts_interval = interval;
return size;
}
static ssize_t wusb_trust_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
ssize_t result = -ENOSYS;
unsigned trust_timeout;
result = sscanf(buf, "%u", &trust_timeout);
if (result != 1) {
result = -EINVAL;
goto out;
}
wusbhc->trust_timeout = min_t(unsigned, trust_timeout, 500);
cancel_delayed_work(&wusbhc->keep_alive_timer);
flush_workqueue(wusbd);
queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
msecs_to_jiffies(wusbhc->trust_timeout / 2));
out:
return result < 0 ? result : size;
}
static ssize_t wusb_trust_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
ssize_t result = -ENOSYS;
unsigned trust_timeout;
result = sscanf(buf, "%u", &trust_timeout);
if (result != 1) {
result = -EINVAL;
goto out;
}
/* FIXME: maybe we should check for range validity? */
wusbhc->trust_timeout = trust_timeout;
cancel_delayed_work(&wusbhc->keep_alive_timer);
flush_workqueue(wusbd);
queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
(trust_timeout * CONFIG_HZ)/1000/2);
out:
return result < 0 ? result : size;
}
