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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/usb/core
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/devices.c26
-rw-r--r--drivers/usb/core/devio.c51
-rw-r--r--drivers/usb/core/hcd.c4
-rw-r--r--drivers/usb/core/hub.c39
-rw-r--r--drivers/usb/core/hub.h5
-rw-r--r--drivers/usb/core/port.c95
-rw-r--r--drivers/usb/core/usb.c13
7 files changed, 156 insertions, 77 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 2a3bbdf7e..cffa0a0d7 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -661,32 +661,8 @@ static unsigned int usb_device_poll(struct file *file,
return 0;
}
-static loff_t usb_device_lseek(struct file *file, loff_t offset, int orig)
-{
- loff_t ret;
-
- mutex_lock(&file_inode(file)->i_mutex);
-
- switch (orig) {
- case 0:
- file->f_pos = offset;
- ret = file->f_pos;
- break;
- case 1:
- file->f_pos += offset;
- ret = file->f_pos;
- break;
- case 2:
- default:
- ret = -EINVAL;
- }
-
- mutex_unlock(&file_inode(file)->i_mutex);
- return ret;
-}
-
const struct file_operations usbfs_devices_fops = {
- .llseek = usb_device_lseek,
+ .llseek = no_seek_end_llseek,
.read = usb_device_read,
.poll = usb_device_poll,
};
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 38ae877c4..59e7a3369 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -100,6 +100,11 @@ static bool usbfs_snoop;
module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
+static unsigned usbfs_snoop_max = 65536;
+module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(usbfs_snoop_max,
+ "maximum number of bytes to print while snooping");
+
#define snoop(dev, format, arg...) \
do { \
if (usbfs_snoop) \
@@ -157,30 +162,6 @@ static int connected(struct usb_dev_state *ps)
ps->dev->state != USB_STATE_NOTATTACHED);
}
-static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
-{
- loff_t ret;
-
- mutex_lock(&file_inode(file)->i_mutex);
-
- switch (orig) {
- case 0:
- file->f_pos = offset;
- ret = file->f_pos;
- break;
- case 1:
- file->f_pos += offset;
- ret = file->f_pos;
- break;
- case 2:
- default:
- ret = -EINVAL;
- }
-
- mutex_unlock(&file_inode(file)->i_mutex);
- return ret;
-}
-
static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
loff_t *ppos)
{
@@ -392,6 +373,7 @@ static void snoop_urb(struct usb_device *udev,
ep, t, d, length, timeout_or_status);
}
+ data_len = min(data_len, usbfs_snoop_max);
if (data && data_len > 0) {
print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
data, data_len, 1);
@@ -402,7 +384,8 @@ static void snoop_urb_data(struct urb *urb, unsigned len)
{
int i, size;
- if (!usbfs_snoop)
+ len = min(len, usbfs_snoop_max);
+ if (!usbfs_snoop || len == 0)
return;
if (urb->num_sgs == 0) {
@@ -1709,8 +1692,12 @@ static struct async *reap_as(struct usb_dev_state *ps)
static int proc_reapurb(struct usb_dev_state *ps, void __user *arg)
{
struct async *as = reap_as(ps);
+
if (as) {
- int retval = processcompl(as, (void __user * __user *)arg);
+ int retval;
+
+ snoop(&ps->dev->dev, "reap %p\n", as->userurb);
+ retval = processcompl(as, (void __user * __user *)arg);
free_async(as);
return retval;
}
@@ -1726,6 +1713,7 @@ static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg)
as = async_getcompleted(ps);
if (as) {
+ snoop(&ps->dev->dev, "reap %p\n", as->userurb);
retval = processcompl(as, (void __user * __user *)arg);
free_async(as);
} else {
@@ -1852,8 +1840,12 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg)
{
struct async *as = reap_as(ps);
+
if (as) {
- int retval = processcompl_compat(as, (void __user * __user *)arg);
+ int retval;
+
+ snoop(&ps->dev->dev, "reap %p\n", as->userurb);
+ retval = processcompl_compat(as, (void __user * __user *)arg);
free_async(as);
return retval;
}
@@ -1869,6 +1861,7 @@ static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *ar
as = async_getcompleted(ps);
if (as) {
+ snoop(&ps->dev->dev, "reap %p\n", as->userurb);
retval = processcompl_compat(as, (void __user * __user *)arg);
free_async(as);
} else {
@@ -2273,7 +2266,7 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
#endif
case USBDEVFS_DISCARDURB:
- snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
+ snoop(&dev->dev, "%s: DISCARDURB %p\n", __func__, p);
ret = proc_unlinkurb(ps, p);
break;
@@ -2366,7 +2359,7 @@ static unsigned int usbdev_poll(struct file *file,
const struct file_operations usbdev_file_operations = {
.owner = THIS_MODULE,
- .llseek = usbdev_lseek,
+ .llseek = no_seek_end_llseek,
.read = usbdev_read,
.poll = usbdev_poll,
.unlocked_ioctl = usbdev_ioctl,
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 1c102d60c..df0e3b925 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -3000,7 +3000,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
-struct usb_mon_operations *mon_ops;
+const struct usb_mon_operations *mon_ops;
/*
* The registration is unlocked.
@@ -3010,7 +3010,7 @@ struct usb_mon_operations *mon_ops;
* symbols from usbcore, usbcore gets referenced and cannot be unloaded first.
*/
-int usb_mon_register (struct usb_mon_operations *ops)
+int usb_mon_register(const struct usb_mon_operations *ops)
{
if (mon_ops)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 1560f3f3e..51b436918 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3324,7 +3324,7 @@ static int finish_port_resume(struct usb_device *udev)
/*
* There are some SS USB devices which take longer time for link training.
* XHCI specs 4.19.4 says that when Link training is successful, port
- * sets CSC bit to 1. So if SW reads port status before successful link
+ * sets CCS bit to 1. So if SW reads port status before successful link
* training, then it will not find device to be present.
* USB Analyzer log with such buggy devices show that in some cases
* device switch on the RX termination after long delay of host enabling
@@ -3335,14 +3335,17 @@ static int finish_port_resume(struct usb_device *udev)
* routine implements a 2000 ms timeout for link training. If in a case
* link trains before timeout, loop will exit earlier.
*
+ * There are also some 2.0 hard drive based devices and 3.0 thumb
+ * drives that, when plugged into a 2.0 only port, take a long
+ * time to set CCS after VBUS enable.
+ *
* FIXME: If a device was connected before suspend, but was removed
* while system was asleep, then the loop in the following routine will
* only exit at timeout.
*
- * This routine should only be called when persist is enabled for a SS
- * device.
+ * This routine should only be called when persist is enabled.
*/
-static int wait_for_ss_port_enable(struct usb_device *udev,
+static int wait_for_connected(struct usb_device *udev,
struct usb_hub *hub, int *port1,
u16 *portchange, u16 *portstatus)
{
@@ -3355,6 +3358,7 @@ static int wait_for_ss_port_enable(struct usb_device *udev,
delay_ms += 20;
status = hub_port_status(hub, *port1, portstatus, portchange);
}
+ dev_dbg(&udev->dev, "Waited %dms for CONNECT\n", delay_ms);
return status;
}
@@ -3454,8 +3458,8 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
}
}
- if (udev->persist_enabled && hub_is_superspeed(hub->hdev))
- status = wait_for_ss_port_enable(udev, hub, &port1, &portchange,
+ if (udev->persist_enabled)
+ status = wait_for_connected(udev, hub, &port1, &portchange,
&portstatus);
status = check_port_resume_type(udev,
@@ -4040,6 +4044,8 @@ EXPORT_SYMBOL_GPL(usb_unlocked_disable_lpm);
void usb_enable_lpm(struct usb_device *udev)
{
struct usb_hcd *hcd;
+ struct usb_hub *hub;
+ struct usb_port *port_dev;
if (!udev || !udev->parent ||
udev->speed != USB_SPEED_SUPER ||
@@ -4059,8 +4065,17 @@ void usb_enable_lpm(struct usb_device *udev)
if (udev->lpm_disable_count > 0)
return;
- usb_enable_link_state(hcd, udev, USB3_LPM_U1);
- usb_enable_link_state(hcd, udev, USB3_LPM_U2);
+ hub = usb_hub_to_struct_hub(udev->parent);
+ if (!hub)
+ return;
+
+ port_dev = hub->ports[udev->portnum - 1];
+
+ if (port_dev->usb3_lpm_u1_permit)
+ usb_enable_link_state(hcd, udev, USB3_LPM_U1);
+
+ if (port_dev->usb3_lpm_u2_permit)
+ usb_enable_link_state(hcd, udev, USB3_LPM_U2);
}
EXPORT_SYMBOL_GPL(usb_enable_lpm);
@@ -5386,6 +5401,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
}
bos = udev->bos;
+ udev->bos = NULL;
for (i = 0; i < SET_CONFIG_TRIES; ++i) {
@@ -5478,11 +5494,8 @@ done:
usb_set_usb2_hardware_lpm(udev, 1);
usb_unlocked_enable_lpm(udev);
usb_enable_ltm(udev);
- /* release the new BOS descriptor allocated by hub_port_init() */
- if (udev->bos != bos) {
- usb_release_bos_descriptor(udev);
- udev->bos = bos;
- }
+ usb_release_bos_descriptor(udev);
+ udev->bos = bos;
return 0;
re_enumerate:
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 688817fb3..45d070dd1 100644
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -92,6 +92,8 @@ struct usb_hub {
* @status_lock: synchronize port_event() vs usb_port_{suspend|resume}
* @portnum: port index num based one
* @is_superspeed cache super-speed status
+ * @usb3_lpm_u1_permit: whether USB3 U1 LPM is permitted.
+ * @usb3_lpm_u2_permit: whether USB3 U2 LPM is permitted.
*/
struct usb_port {
struct usb_device *child;
@@ -104,6 +106,8 @@ struct usb_port {
struct mutex status_lock;
u8 portnum;
unsigned int is_superspeed:1;
+ unsigned int usb3_lpm_u1_permit:1;
+ unsigned int usb3_lpm_u2_permit:1;
};
#define to_usb_port(_dev) \
@@ -155,4 +159,3 @@ static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
{
return hub_port_debounce(hub, port1, false);
}
-
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index 5487fe308..14718a9ff 100644
--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
@@ -50,6 +50,72 @@ static ssize_t connect_type_show(struct device *dev,
}
static DEVICE_ATTR_RO(connect_type);
+static ssize_t usb3_lpm_permit_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usb_port *port_dev = to_usb_port(dev);
+ const char *p;
+
+ if (port_dev->usb3_lpm_u1_permit) {
+ if (port_dev->usb3_lpm_u2_permit)
+ p = "u1_u2";
+ else
+ p = "u1";
+ } else {
+ if (port_dev->usb3_lpm_u2_permit)
+ p = "u2";
+ else
+ p = "0";
+ }
+
+ return sprintf(buf, "%s\n", p);
+}
+
+static ssize_t usb3_lpm_permit_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct usb_port *port_dev = to_usb_port(dev);
+ struct usb_device *udev = port_dev->child;
+ struct usb_hcd *hcd;
+
+ if (!strncmp(buf, "u1_u2", 5)) {
+ port_dev->usb3_lpm_u1_permit = 1;
+ port_dev->usb3_lpm_u2_permit = 1;
+
+ } else if (!strncmp(buf, "u1", 2)) {
+ port_dev->usb3_lpm_u1_permit = 1;
+ port_dev->usb3_lpm_u2_permit = 0;
+
+ } else if (!strncmp(buf, "u2", 2)) {
+ port_dev->usb3_lpm_u1_permit = 0;
+ port_dev->usb3_lpm_u2_permit = 1;
+
+ } else if (!strncmp(buf, "0", 1)) {
+ port_dev->usb3_lpm_u1_permit = 0;
+ port_dev->usb3_lpm_u2_permit = 0;
+ } else
+ return -EINVAL;
+
+ /* If device is connected to the port, disable or enable lpm
+ * to make new u1 u2 setting take effect immediately.
+ */
+ if (udev) {
+ hcd = bus_to_hcd(udev->bus);
+ if (!hcd)
+ return -EINVAL;
+ usb_lock_device(udev);
+ mutex_lock(hcd->bandwidth_mutex);
+ if (!usb_disable_lpm(udev))
+ usb_enable_lpm(udev);
+ mutex_unlock(hcd->bandwidth_mutex);
+ usb_unlock_device(udev);
+ }
+
+ return count;
+}
+static DEVICE_ATTR_RW(usb3_lpm_permit);
+
static struct attribute *port_dev_attrs[] = {
&dev_attr_connect_type.attr,
NULL,
@@ -64,6 +130,21 @@ static const struct attribute_group *port_dev_group[] = {
NULL,
};
+static struct attribute *port_dev_usb3_attrs[] = {
+ &dev_attr_usb3_lpm_permit.attr,
+ NULL,
+};
+
+static struct attribute_group port_dev_usb3_attr_grp = {
+ .attrs = port_dev_usb3_attrs,
+};
+
+static const struct attribute_group *port_dev_usb3_group[] = {
+ &port_dev_attr_grp,
+ &port_dev_usb3_attr_grp,
+ NULL,
+};
+
static void usb_port_device_release(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
@@ -168,12 +249,18 @@ static int usb_port_runtime_suspend(struct device *dev)
return retval;
}
+
+static int usb_port_prepare(struct device *dev)
+{
+ return 1;
+}
#endif
static const struct dev_pm_ops usb_port_pm_ops = {
#ifdef CONFIG_PM
.runtime_suspend = usb_port_runtime_suspend,
.runtime_resume = usb_port_runtime_resume,
+ .prepare = usb_port_prepare,
#endif
};
@@ -401,6 +488,7 @@ static void find_and_link_peer(struct usb_hub *hub, int port1)
int usb_hub_create_port_device(struct usb_hub *hub, int port1)
{
struct usb_port *port_dev;
+ struct usb_device *hdev = hub->hdev;
int retval;
port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
@@ -417,7 +505,12 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1)
port_dev->portnum = port1;
set_bit(port1, hub->power_bits);
port_dev->dev.parent = hub->intfdev;
- port_dev->dev.groups = port_dev_group;
+ if (hub_is_superspeed(hdev)) {
+ port_dev->usb3_lpm_u1_permit = 1;
+ port_dev->usb3_lpm_u2_permit = 1;
+ port_dev->dev.groups = port_dev_usb3_group;
+ } else
+ port_dev->dev.groups = port_dev_group;
port_dev->dev.type = &usb_port_device_type;
port_dev->dev.driver = &usb_port_driver;
if (hub_is_superspeed(hub->hdev))
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index f8bbd0b6d..ebb29caa3 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -49,12 +49,7 @@ const char *usbcore_name = "usbcore";
static bool nousb; /* Disable USB when built into kernel image */
-/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */
-#ifdef MODULE
module_param(nousb, bool, 0444);
-#else
-core_param(nousb, nousb, bool, 0444);
-#endif
/*
* for external read access to <nousb>
@@ -316,7 +311,13 @@ static int usb_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
static int usb_dev_prepare(struct device *dev)
{
- return 0; /* Implement eventually? */
+ struct usb_device *udev = to_usb_device(dev);
+
+ /* Return 0 if the current wakeup setting is wrong, otherwise 1 */
+ if (udev->do_remote_wakeup != device_may_wakeup(dev))
+ return 0;
+
+ return 1;
}
static void usb_dev_complete(struct device *dev)