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-rw-r--r--drivers/usb/core/driver.c14
-rw-r--r--drivers/usb/core/hub.c9
-rw-r--r--drivers/usb/core/usb.h5
-rw-r--r--drivers/usb/host/xhci-hub.c9
-rw-r--r--drivers/usb/host/xhci-pci.c1
-rw-r--r--drivers/usb/host/xhci.c74
-rw-r--r--drivers/usb/host/xhci.h4
-rw-r--r--include/linux/usb.h4
-rw-r--r--include/linux/usb/hcd.h1
9 files changed, 120 insertions, 1 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 14b83f2a4e8..adf5ca8a239 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1700,6 +1700,20 @@ int usb_runtime_idle(struct device *dev)
return 0;
}
+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 (hcd->driver->set_usb2_hw_lpm) {
+ ret = hcd->driver->set_usb2_hw_lpm(hcd, udev, enable);
+ if (!ret)
+ udev->usb2_hw_lpm_enabled = enable;
+ }
+
+ return ret;
+}
+
#endif /* CONFIG_USB_SUSPEND */
struct bus_type usb_bus_type = {
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 4ffc3d1bd9e..d6cc8324934 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2392,6 +2392,10 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
}
}
+ /* disable USB2 hardware LPM */
+ if (udev->usb2_hw_lpm_enabled == 1)
+ usb_set_usb2_hardware_lpm(udev, 0);
+
/* see 7.1.7.6 */
if (hub_is_superspeed(hub->hdev))
status = set_port_feature(hub->hdev,
@@ -2603,7 +2607,12 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
if (status < 0) {
dev_dbg(&udev->dev, "can't resume, status %d\n", status);
hub_port_logical_disconnect(hub, port1);
+ } else {
+ /* Try to enable USB2 hardware LPM */
+ if (udev->usb2_hw_lpm_capable == 1)
+ usb_set_usb2_hardware_lpm(udev, 1);
}
+
return status;
}
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 0d023cd2c14..3888778582c 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -82,6 +82,7 @@ extern int usb_remote_wakeup(struct usb_device *dev);
extern int usb_runtime_suspend(struct device *dev);
extern int usb_runtime_resume(struct device *dev);
extern int usb_runtime_idle(struct device *dev);
+extern int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable);
#else
@@ -96,6 +97,10 @@ static inline int usb_remote_wakeup(struct usb_device *udev)
return 0;
}
+static inline int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable)
+{
+ return 0;
+}
#endif
extern struct bus_type usb_bus_type;
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index d7be6d7324d..9f844d45c66 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -574,10 +574,19 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
temp = xhci_readl(xhci, port_array[wIndex]);
+ if ((temp & PORT_PLS_MASK) != XDEV_U0) {
+ /* Resume the port to U0 first */
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_U0);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(10);
+ spin_lock_irqsave(&xhci->lock, flags);
+ }
/* In spec software should not attempt to suspend
* a port unless the port reports that it is in the
* enabled (PED = ‘1’,PLS < ‘3’) state.
*/
+ temp = xhci_readl(xhci, port_array[wIndex]);
if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
xhci_warn(xhci, "USB core suspending device "
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 213a7d73b11..e66e2b03fbb 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -349,6 +349,7 @@ static const struct hc_driver xhci_pci_hc_driver = {
* call back when device connected and addressed
*/
.update_device = xhci_update_device,
+ .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm,
};
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index b0649a4bd31..4648cc0c572 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3286,6 +3286,11 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
}
+ if (udev->usb2_hw_lpm_enabled) {
+ xhci_set_usb2_hardware_lpm(hcd, udev, 0);
+ udev->usb2_hw_lpm_enabled = 0;
+ }
+
spin_lock_irqsave(&xhci->lock, flags);
/* Don't disable the slot if the host controller is dead. */
state = xhci_readl(xhci, &xhci->op_regs->status);
@@ -3699,20 +3704,87 @@ finish:
return ret;
}
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ __le32 __iomem **port_array;
+ __le32 __iomem *pm_addr;
+ u32 temp;
+ unsigned int port_num;
+ unsigned long flags;
+ int u2del, hird;
+
+ if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support ||
+ !udev->lpm_capable)
+ return -EPERM;
+
+ if (!udev->parent || udev->parent->parent ||
+ udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+ return -EPERM;
+
+ if (udev->usb2_hw_lpm_capable != 1)
+ return -EPERM;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ port_array = xhci->usb2_ports;
+ port_num = udev->portnum - 1;
+ pm_addr = port_array[port_num] + 1;
+ temp = xhci_readl(xhci, pm_addr);
+
+ xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n",
+ enable ? "enable" : "disable", port_num);
+
+ u2del = HCS_U2_LATENCY(xhci->hcs_params3);
+ if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2))
+ hird = xhci_calculate_hird_besl(u2del, 1);
+ else
+ hird = xhci_calculate_hird_besl(u2del, 0);
+
+ if (enable) {
+ temp &= ~PORT_HIRD_MASK;
+ temp |= PORT_HIRD(hird) | PORT_RWE;
+ xhci_writel(xhci, temp, pm_addr);
+ temp = xhci_readl(xhci, pm_addr);
+ temp |= PORT_HLE;
+ xhci_writel(xhci, temp, pm_addr);
+ } else {
+ temp &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK);
+ xhci_writel(xhci, temp, pm_addr);
+ }
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+}
+
int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
ret = xhci_usb2_software_lpm_test(hcd, udev);
- if (!ret)
+ if (!ret) {
xhci_dbg(xhci, "software LPM test succeed\n");
+ if (xhci->hw_lpm_support == 1) {
+ udev->usb2_hw_lpm_capable = 1;
+ ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1);
+ if (!ret)
+ udev->usb2_hw_lpm_enabled = 1;
+ }
+ }
return 0;
}
#else
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable)
+{
+ return 0;
+}
+
int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
{
return 0;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index b24c4fce457..e738466703a 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -367,7 +367,9 @@ struct xhci_op_regs {
#define PORT_L1S_SUCCESS 1
#define PORT_RWE (1 << 3)
#define PORT_HIRD(p) (((p) & 0xf) << 4)
+#define PORT_HIRD_MASK (0xf << 4)
#define PORT_L1DS(p) (((p) & 0xff) << 8)
+#define PORT_HLE (1 << 16)
/**
* struct xhci_intr_reg - Interrupt Register Set
@@ -1677,6 +1679,8 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
gfp_t mem_flags);
int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable);
int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 1d00d9bc5d6..6f49a1b39fa 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -411,6 +411,8 @@ struct usb_tt;
* @authenticated: Crypto authentication passed
* @wusb: device is Wireless USB
* @lpm_capable: device supports LPM
+ * @usb2_hw_lpm_capable: device can perform USB2 hardware LPM
+ * @usb2_hw_lpm_enabled: USB2 hardware LPM enabled
* @string_langid: language ID for strings
* @product: iProduct string, if present (static)
* @manufacturer: iManufacturer string, if present (static)
@@ -474,6 +476,8 @@ struct usb_device {
unsigned authenticated:1;
unsigned wusb:1;
unsigned lpm_capable:1;
+ unsigned usb2_hw_lpm_capable:1;
+ unsigned usb2_hw_lpm_enabled:1;
int string_langid;
/* static strings from the device */
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 0097136ba45..a4cd6c58870 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -343,6 +343,7 @@ struct hc_driver {
* address is set
*/
int (*update_device)(struct usb_hcd *, struct usb_device *);
+ int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
};
extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-27 22:21:22 +0000