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Merge "usb: misc: lvstest: add entry to place port in compliance mode"

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Linux Build Service Account 2019-05-08 18:49:38 -07:00 • committed by Gerrit - the friendly Code Review server
commit 0052d71715
2 changed files with 54 additions and 0 deletions
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13
Documentation/ABI/testing/sysfs-bus-usb-lvstest
View file

@ -45,3 +45,16 @@ Contact: Pratyush Anand <pratyush.anand@gmail.com>
Description:
Write to this node to issue "U3 exit" for Link Layer
Validation device. It is needed for TD.7.36.
What: /sys/bus/usb/devices/.../enable_compliance
Date: July 2017
Description:
Write to this node to set the port to compliance mode to test
with Link Layer Validation device. It is needed for TD.7.34.
What: /sys/bus/usb/devices/.../warm_reset
Date: July 2017
Description:
Write to this node to issue "Warm Reset" for Link Layer Validation
device. It may be needed to properly reset an xHCI 1.1 host port if
compliance mode needed to be explicitly enabled.

41
drivers/usb/misc/lvstest.c
View file

@ -180,6 +180,25 @@ static ssize_t hot_reset_store(struct device *dev,
}
static DEVICE_ATTR_WO(hot_reset);
static ssize_t warm_reset_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usb_device *hdev = interface_to_usbdev(intf);
struct lvs_rh *lvs = usb_get_intfdata(intf);
int ret;
ret = lvs_rh_set_port_feature(hdev, lvs->portnum,
USB_PORT_FEAT_BH_PORT_RESET);
if (ret < 0) {
dev_err(dev, "can't issue warm reset %d\n", ret);
return ret;
}
return count;
}
static DEVICE_ATTR_WO(warm_reset);
static ssize_t u2_timeout_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
@ -278,13 +297,35 @@ free_desc:
}
static DEVICE_ATTR_WO(get_dev_desc);
static ssize_t enable_compliance_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usb_device *hdev = interface_to_usbdev(intf);
struct lvs_rh *lvs = usb_get_intfdata(intf);
int ret;
ret = lvs_rh_set_port_feature(hdev,
lvs->portnum | USB_SS_PORT_LS_COMP_MOD << 3,
USB_PORT_FEAT_LINK_STATE);
if (ret < 0) {
dev_err(dev, "can't enable compliance mode %d\n", ret);
return ret;
}
return count;
}
static DEVICE_ATTR_WO(enable_compliance);
static struct attribute *lvs_attributes[] = {
&dev_attr_get_dev_desc.attr,
&dev_attr_u1_timeout.attr,
&dev_attr_u2_timeout.attr,
&dev_attr_hot_reset.attr,
&dev_attr_warm_reset.attr,
&dev_attr_u3_entry.attr,
&dev_attr_u3_exit.attr,
&dev_attr_enable_compliance.attr,
NULL
};