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wusbcore: add sysfs attribute for DNTS count and interval 

This patch adds a sysfs attribute for the wireless USB host controller
device notification transmit slot(DNTS) count and interval.  It also
changes the defaults from 16 slots in every MMC to a more reasonable 4
slots every 2ms.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Pugliese 2013-06-18 13:31:25 -05:00 committed by Greg Kroah-Hartman
parent 8e22978c57
commit 8bf1d0712d
3 changed files with 39 additions and 3 deletions
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6
drivers/usb/wusbcore/mmc.c
View File

@ -214,9 +214,9 @@ int wusbhc_start(struct wusbhc *wusbhc)
dev_err(dev, "error starting security in the HC: %d\n", result);
goto error_sec_start;
}
/* FIXME: the choice of the DNTS parameters is somewhat
* arbitrary */
result = wusbhc->set_num_dnts(wusbhc, 0, 15);
result = wusbhc->set_num_dnts(wusbhc, wusbhc->dnts_interval,
wusbhc->dnts_num_slots);
if (result < 0) {
dev_err(dev, "Cannot set DNTS parameters: %d\n", result);
goto error_set_num_dnts;

34
drivers/usb/wusbcore/wusbhc.c
View File

@ -175,11 +175,42 @@ static ssize_t wusb_phy_rate_store(struct device *dev,
}
static DEVICE_ATTR(wusb_phy_rate, 0644, wusb_phy_rate_show, wusb_phy_rate_store);
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);
}
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 DEVICE_ATTR(wusb_dnts, 0644, wusb_dnts_show, wusb_dnts_store);
/* Group all the WUSBHC attributes */
static struct attribute *wusbhc_attrs[] = {
&dev_attr_wusb_trust_timeout.attr,
&dev_attr_wusb_chid.attr,
&dev_attr_wusb_phy_rate.attr,
&dev_attr_wusb_dnts.attr,
NULL,
};
@ -205,8 +236,11 @@ int wusbhc_create(struct wusbhc *wusbhc)
{
int result = 0;
/* set defaults. These can be overwritten using sysfs attributes. */
wusbhc->trust_timeout = WUSB_TRUST_TIMEOUT_MS;
wusbhc->phy_rate = UWB_PHY_RATE_INVALID - 1;
wusbhc->dnts_num_slots = 4;
wusbhc->dnts_interval = 2;
mutex_init(&wusbhc->mutex);
result = wusbhc_mmcie_create(wusbhc);

2
drivers/usb/wusbcore/wusbhc.h
View File

@ -252,6 +252,8 @@ struct wusbhc {
unsigned trust_timeout; /* in jiffies */
struct wusb_ckhdid chid;
uint8_t phy_rate;
uint8_t dnts_num_slots;
uint8_t dnts_interval;
struct wuie_host_info *wuie_host_info;
struct mutex mutex; /* locks everything else */