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path: root/drivers/usb/host/xhci-hub.c
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Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
-rw-r--r--drivers/usb/host/xhci-hub.c140
1 files changed, 90 insertions, 50 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 723f8231193..430e88fd3f6 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -20,6 +20,7 @@
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/gfp.h>
#include <asm/unaligned.h>
#include "xhci.h"
@@ -28,6 +29,25 @@
#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
PORT_RC | PORT_PLC | PORT_PE)
+/* usb 1.1 root hub device descriptor */
+static u8 usb_bos_descriptor [] = {
+ USB_DT_BOS_SIZE, /* __u8 bLength, 5 bytes */
+ USB_DT_BOS, /* __u8 bDescriptorType */
+ 0x0F, 0x00, /* __le16 wTotalLength, 15 bytes */
+ 0x1, /* __u8 bNumDeviceCaps */
+ /* First device capability */
+ USB_DT_USB_SS_CAP_SIZE, /* __u8 bLength, 10 bytes */
+ USB_DT_DEVICE_CAPABILITY, /* Device Capability */
+ USB_SS_CAP_TYPE, /* bDevCapabilityType, SUPERSPEED_USB */
+ 0x00, /* bmAttributes, LTM off by default */
+ USB_5GBPS_OPERATION, 0x00, /* wSpeedsSupported, 5Gbps only */
+ 0x03, /* bFunctionalitySupport,
+ USB 3.0 speed only */
+ 0x00, /* bU1DevExitLat, set later. */
+ 0x00, 0x00 /* __le16 bU2DevExitLat, set later. */
+};
+
+
static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
struct usb_hub_descriptor *desc, int ports)
{
@@ -232,7 +252,7 @@ int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
continue;
speed = xhci->devs[i]->udev->speed;
if (((speed == USB_SPEED_SUPER) == (hcd->speed == HCD_USB3))
- && xhci->devs[i]->port == port) {
+ && xhci->devs[i]->fake_port == port) {
slot_id = i;
break;
}
@@ -392,13 +412,39 @@ static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array)
return max_ports;
}
+void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
+ int port_id, u32 link_state)
+{
+ u32 temp;
+
+ temp = xhci_readl(xhci, port_array[port_id]);
+ temp = xhci_port_state_to_neutral(temp);
+ temp &= ~PORT_PLS_MASK;
+ temp |= PORT_LINK_STROBE | link_state;
+ xhci_writel(xhci, temp, port_array[port_id]);
+}
+
+/* Test and clear port RWC bit */
+void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array,
+ int port_id, u32 port_bit)
+{
+ u32 temp;
+
+ temp = xhci_readl(xhci, port_array[port_id]);
+ if (temp & port_bit) {
+ temp = xhci_port_state_to_neutral(temp);
+ temp |= port_bit;
+ xhci_writel(xhci, temp, port_array[port_id]);
+ }
+}
+
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int max_ports;
unsigned long flags;
- u32 temp, temp1, status;
+ u32 temp, status;
int retval = 0;
__le32 __iomem **port_array;
int slot_id;
@@ -429,6 +475,21 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_hub_descriptor(hcd, xhci,
(struct usb_hub_descriptor *) buf);
break;
+ case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
+ if ((wValue & 0xff00) != (USB_DT_BOS << 8))
+ goto error;
+
+ if (hcd->speed != HCD_USB3)
+ goto error;
+
+ memcpy(buf, &usb_bos_descriptor,
+ USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+ buf[12] = HCS_U1_LATENCY(temp);
+ put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
case GetPortStatus:
if (!wIndex || wIndex > max_ports)
goto error;
@@ -472,11 +533,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_dbg(xhci, "Resume USB2 port %d\n",
wIndex + 1);
bus_state->resume_done[wIndex] = 0;
- temp1 = xhci_port_state_to_neutral(temp);
- temp1 &= ~PORT_PLS_MASK;
- temp1 |= PORT_LINK_STROBE | XDEV_U0;
- xhci_writel(xhci, temp1, port_array[wIndex]);
-
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_U0);
xhci_dbg(xhci, "set port %d resume\n",
wIndex + 1);
slot_id = xhci_find_slot_id_by_port(hcd, xhci,
@@ -551,10 +609,19 @@ 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 "
@@ -573,10 +640,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_stop_device(xhci, slot_id, 1);
spin_lock_irqsave(&xhci->lock, flags);
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_U3;
- xhci_writel(xhci, temp, port_array[wIndex]);
+ xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);
spin_unlock_irqrestore(&xhci->lock, flags);
msleep(10); /* wait device to enter */
@@ -610,10 +674,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
}
}
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | link_state;
- xhci_writel(xhci, temp, port_array[wIndex]);
+ xhci_set_link_state(xhci, port_array, wIndex,
+ link_state);
spin_unlock_irqrestore(&xhci->lock, flags);
msleep(20); /* wait device to enter */
@@ -677,24 +739,13 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
if ((temp & PORT_PE) == 0)
goto error;
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_RESUME;
- xhci_writel(xhci, temp,
- port_array[wIndex]);
-
- spin_unlock_irqrestore(&xhci->lock,
- flags);
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_RESUME);
+ spin_unlock_irqrestore(&xhci->lock, flags);
msleep(20);
spin_lock_irqsave(&xhci->lock, flags);
-
- temp = xhci_readl(xhci,
- port_array[wIndex]);
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_U0;
- xhci_writel(xhci, temp,
- port_array[wIndex]);
+ xhci_set_link_state(xhci, port_array, wIndex,
+ XDEV_U0);
}
bus_state->port_c_suspend |= 1 << wIndex;
@@ -910,25 +961,18 @@ int xhci_bus_resume(struct usb_hcd *hcd)
if (test_bit(port_index, &bus_state->bus_suspended) &&
(temp & PORT_PLS_MASK)) {
if (DEV_SUPERSPEED(temp)) {
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_U0;
- xhci_writel(xhci, temp, port_array[port_index]);
+ xhci_set_link_state(xhci, port_array,
+ port_index, XDEV_U0);
} else {
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_RESUME;
- xhci_writel(xhci, temp, port_array[port_index]);
+ xhci_set_link_state(xhci, port_array,
+ port_index, XDEV_RESUME);
spin_unlock_irqrestore(&xhci->lock, flags);
msleep(20);
spin_lock_irqsave(&xhci->lock, flags);
- temp = xhci_readl(xhci, port_array[port_index]);
- temp = xhci_port_state_to_neutral(temp);
- temp &= ~PORT_PLS_MASK;
- temp |= PORT_LINK_STROBE | XDEV_U0;
- xhci_writel(xhci, temp, port_array[port_index]);
+ xhci_set_link_state(xhci, port_array,
+ port_index, XDEV_U0);
}
/* wait for the port to enter U0 and report port link
* state change.
@@ -938,12 +982,8 @@ int xhci_bus_resume(struct usb_hcd *hcd)
spin_lock_irqsave(&xhci->lock, flags);
/* Clear PLC */
- temp = xhci_readl(xhci, port_array[port_index]);
- if (temp & PORT_PLC) {
- temp = xhci_port_state_to_neutral(temp);
- temp |= PORT_PLC;
- xhci_writel(xhci, temp, port_array[port_index]);
- }
+ xhci_test_and_clear_bit(xhci, port_array, port_index,
+ PORT_PLC);
slot_id = xhci_find_slot_id_by_port(hcd,
xhci, port_index + 1);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 08:58:50 +0000