summaryrefslogtreecommitdiffstats
path: root/drivers/usb
diff options
context:
space:
mode:
authorThomas Pugliese <thomas.pugliese@gmail.com>2013-06-18 13:31:25 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-24 16:19:02 -0700
commit8bf1d0712d54bcb7c55b3f03b2c1a2f6fdfa6536 (patch)
tree370fa341719d56b704138f66e5bcc34f039aeede /drivers/usb
parent8e22978c57087aac4d88693278db1cc3e94f1253 (diff)
downloadlinux-8bf1d0712d54bcb7c55b3f03b2c1a2f6fdfa6536.tar.bz2
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/wusbcore/mmc.c6
-rw-r--r--drivers/usb/wusbcore/wusbhc.c34
-rw-r--r--drivers/usb/wusbcore/wusbhc.h2
3 files changed, 39 insertions, 3 deletions
diff --git a/drivers/usb/wusbcore/mmc.c b/drivers/usb/wusbcore/mmc.c
index b8c72583c040..021467f86d9e 100644
--- a/drivers/usb/wusbcore/mmc.c
+++ b/drivers/usb/wusbcore/mmc.c
@@ -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;
diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c
index c35ee4394810..8759aa66da28 100644
--- a/drivers/usb/wusbcore/wusbhc.c
+++ b/drivers/usb/wusbcore/wusbhc.c
@@ -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);
diff --git a/drivers/usb/wusbcore/wusbhc.h b/drivers/usb/wusbcore/wusbhc.h
index b4a4fa7c5131..a7069f49c05a 100644
--- a/drivers/usb/wusbcore/wusbhc.h
+++ b/drivers/usb/wusbcore/wusbhc.h
@@ -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 */