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-rw-r--r--drivers/usb/core/driver.c3
-rw-r--r--drivers/usb/core/hub.c1
-rw-r--r--drivers/usb/core/sysfs.c6
-rw-r--r--drivers/usb/host/xhci-mem.c10
-rw-r--r--drivers/usb/host/xhci.c161
-rw-r--r--include/linux/usb.h4
6 files changed, 29 insertions, 156 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index f7841d44feda..689433cdef25 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1790,6 +1790,9 @@ int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable)
struct usb_hcd *hcd = bus_to_hcd(udev->bus);
int ret = -EPERM;
+ if (enable && !udev->usb2_hw_lpm_allowed)
+ return 0;
+
if (hcd->driver->set_usb2_hw_lpm) {
ret = hcd->driver->set_usb2_hw_lpm(hcd, udev, enable);
if (!ret)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 879651cb6b45..4de5df07b479 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5198,6 +5198,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
done:
/* Now that the alt settings are re-installed, enable LTM and LPM. */
+ usb_set_usb2_hardware_lpm(udev, 1);
usb_unlocked_enable_lpm(udev);
usb_enable_ltm(udev);
usb_release_bos_descriptor(udev);
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 6d2c8edb1ffe..ca516ac0f234 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -449,7 +449,7 @@ static ssize_t usb2_hardware_lpm_show(struct device *dev,
struct usb_device *udev = to_usb_device(dev);
const char *p;
- if (udev->usb2_hw_lpm_enabled == 1)
+ if (udev->usb2_hw_lpm_allowed == 1)
p = "enabled";
else
p = "disabled";
@@ -469,8 +469,10 @@ static ssize_t usb2_hardware_lpm_store(struct device *dev,
ret = strtobool(buf, &value);
- if (!ret)
+ if (!ret) {
+ udev->usb2_hw_lpm_allowed = value;
ret = usb_set_usb2_hardware_lpm(udev, value);
+ }
usb_unlock_device(udev);
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 83bcd13622c3..49b8bd063fab 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1693,9 +1693,7 @@ void xhci_free_command(struct xhci_hcd *xhci,
void xhci_mem_cleanup(struct xhci_hcd *xhci)
{
struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
- struct dev_info *dev_info, *next;
struct xhci_cd *cur_cd, *next_cd;
- unsigned long flags;
int size;
int i, j, num_ports;
@@ -1756,13 +1754,6 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
scratchpad_free(xhci);
- spin_lock_irqsave(&xhci->lock, flags);
- list_for_each_entry_safe(dev_info, next, &xhci->lpm_failed_devs, list) {
- list_del(&dev_info->list);
- kfree(dev_info);
- }
- spin_unlock_irqrestore(&xhci->lock, flags);
-
if (!xhci->rh_bw)
goto no_bw;
@@ -2231,7 +2222,6 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
u32 page_size, temp;
int i;
- INIT_LIST_HEAD(&xhci->lpm_failed_devs);
INIT_LIST_HEAD(&xhci->cancel_cmd_list);
page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6e0d886bcce5..dfa5ffc56e8f 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -4025,133 +4025,6 @@ static int xhci_calculate_usb2_hw_lpm_params(struct usb_device *udev)
return PORT_BESLD(besld) | PORT_L1_TIMEOUT(l1) | PORT_HIRDM(hirdm);
}
-static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd,
- struct usb_device *udev)
-{
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct dev_info *dev_info;
- __le32 __iomem **port_array;
- __le32 __iomem *addr, *pm_addr;
- u32 temp, dev_id;
- unsigned int port_num;
- unsigned long flags;
- int hird;
- int ret;
-
- if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support ||
- !udev->lpm_capable)
- return -EINVAL;
-
- /* we only support lpm for non-hub device connected to root hub yet */
- if (!udev->parent || udev->parent->parent ||
- udev->descriptor.bDeviceClass == USB_CLASS_HUB)
- return -EINVAL;
-
- spin_lock_irqsave(&xhci->lock, flags);
-
- /* Look for devices in lpm_failed_devs list */
- dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 |
- le16_to_cpu(udev->descriptor.idProduct);
- list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) {
- if (dev_info->dev_id == dev_id) {
- ret = -EINVAL;
- goto finish;
- }
- }
-
- port_array = xhci->usb2_ports;
- port_num = udev->portnum - 1;
-
- if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) {
- xhci_dbg(xhci, "invalid port number %d\n", udev->portnum);
- ret = -EINVAL;
- goto finish;
- }
-
- /*
- * Test USB 2.0 software LPM.
- * FIXME: some xHCI 1.0 hosts may implement a new register to set up
- * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1
- * in the June 2011 errata release.
- */
- xhci_dbg(xhci, "test port %d software LPM\n", port_num);
- /*
- * Set L1 Device Slot and HIRD/BESL.
- * Check device's USB 2.0 extension descriptor to determine whether
- * HIRD or BESL shoule be used. See USB2.0 LPM errata.
- */
- pm_addr = port_array[port_num] + PORTPMSC;
- hird = xhci_calculate_hird_besl(xhci, udev);
- temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird);
- xhci_writel(xhci, temp, pm_addr);
-
- /* Set port link state to U2(L1) */
- addr = port_array[port_num];
- xhci_set_link_state(xhci, port_array, port_num, XDEV_U2);
-
- /* wait for ACK */
- spin_unlock_irqrestore(&xhci->lock, flags);
- msleep(10);
- spin_lock_irqsave(&xhci->lock, flags);
-
- /* Check L1 Status */
- ret = xhci_handshake(xhci, pm_addr,
- PORT_L1S_MASK, PORT_L1S_SUCCESS, 125);
- if (ret != -ETIMEDOUT) {
- /* enter L1 successfully */
- temp = xhci_readl(xhci, addr);
- xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n",
- port_num, temp);
- ret = 0;
- } else {
- temp = xhci_readl(xhci, pm_addr);
- xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n",
- port_num, temp & PORT_L1S_MASK);
- ret = -EINVAL;
- }
-
- /* Resume the port */
- xhci_set_link_state(xhci, port_array, port_num, XDEV_U0);
-
- spin_unlock_irqrestore(&xhci->lock, flags);
- msleep(10);
- spin_lock_irqsave(&xhci->lock, flags);
-
- /* Clear PLC */
- xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC);
-
- /* Check PORTSC to make sure the device is in the right state */
- if (!ret) {
- temp = xhci_readl(xhci, addr);
- xhci_dbg(xhci, "resumed port %d status 0x%x\n", port_num, temp);
- if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) ||
- (temp & PORT_PLS_MASK) != XDEV_U0) {
- xhci_dbg(xhci, "port L1 resume fail\n");
- ret = -EINVAL;
- }
- }
-
- if (ret) {
- /* Insert dev to lpm_failed_devs list */
- xhci_warn(xhci, "device LPM test failed, may disconnect and "
- "re-enumerate\n");
- dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC);
- if (!dev_info) {
- ret = -ENOMEM;
- goto finish;
- }
- dev_info->dev_id = dev_id;
- INIT_LIST_HEAD(&dev_info->list);
- list_add(&dev_info->list, &xhci->lpm_failed_devs);
- } else {
- xhci_ring_device(xhci, udev->slot_id);
- }
-
-finish:
- spin_unlock_irqrestore(&xhci->lock, flags);
- return ret;
-}
-
int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
struct usb_device *udev, int enable)
{
@@ -4279,24 +4152,26 @@ static int xhci_check_usb2_port_capability(struct xhci_hcd *xhci, int port,
int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- int ret;
int portnum = udev->portnum - 1;
- ret = xhci_usb2_software_lpm_test(hcd, udev);
- if (!ret) {
- xhci_dbg(xhci, "software LPM test succeed\n");
- if (xhci->hw_lpm_support == 1 &&
- xhci_check_usb2_port_capability(xhci, portnum, XHCI_HLC)) {
- udev->usb2_hw_lpm_capable = 1;
- udev->l1_params.timeout = XHCI_L1_TIMEOUT;
- udev->l1_params.besl = XHCI_DEFAULT_BESL;
- if (xhci_check_usb2_port_capability(xhci, portnum,
- XHCI_BLC))
- udev->usb2_hw_lpm_besl_capable = 1;
- ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1);
- if (!ret)
- udev->usb2_hw_lpm_enabled = 1;
- }
+ if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support ||
+ !udev->lpm_capable)
+ return 0;
+
+ /* we only support lpm for non-hub device connected to root hub yet */
+ if (!udev->parent || udev->parent->parent ||
+ udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+ return 0;
+
+ if (xhci->hw_lpm_support == 1 &&
+ xhci_check_usb2_port_capability(
+ xhci, portnum, XHCI_HLC)) {
+ udev->usb2_hw_lpm_capable = 1;
+ udev->l1_params.timeout = XHCI_L1_TIMEOUT;
+ udev->l1_params.besl = XHCI_DEFAULT_BESL;
+ if (xhci_check_usb2_port_capability(xhci, portnum,
+ XHCI_BLC))
+ udev->usb2_hw_lpm_besl_capable = 1;
}
return 0;
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 001629cd1a97..39cfa0aca91f 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -475,7 +475,8 @@ struct usb3_lpm_parameters {
* @lpm_capable: device supports LPM
* @usb2_hw_lpm_capable: device can perform USB2 hardware LPM
* @usb2_hw_lpm_besl_capable: device can perform USB2 hardware BESL LPM
- * @usb2_hw_lpm_enabled: USB2 hardware LPM enabled
+ * @usb2_hw_lpm_enabled: USB2 hardware LPM is enabled
+ * @usb2_hw_lpm_allowed: Userspace allows USB 2.0 LPM to be enabled
* @usb3_lpm_enabled: USB3 hardware LPM enabled
* @string_langid: language ID for strings
* @product: iProduct string, if present (static)
@@ -548,6 +549,7 @@ struct usb_device {
unsigned usb2_hw_lpm_capable:1;
unsigned usb2_hw_lpm_besl_capable:1;
unsigned usb2_hw_lpm_enabled:1;
+ unsigned usb2_hw_lpm_allowed:1;
unsigned usb3_lpm_enabled:1;
int string_langid;
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-17 10:35:52 +0000