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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.c167
1 files changed, 139 insertions, 28 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 3bddeaa1e2d7..5e3e9d4c6956 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -392,10 +392,8 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
trace_xhci_stop_device(virt_dev);
cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
- if (!cmd) {
- xhci_dbg(xhci, "Couldn't allocate command structure.\n");
+ if (!cmd)
return -ENOMEM;
- }
spin_lock_irqsave(&xhci->lock, flags);
for (i = LAST_EP_INDEX; i > 0; i--) {
@@ -540,6 +538,119 @@ static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array)
return max_ports;
}
+static __le32 __iomem *xhci_get_port_io_addr(struct usb_hcd *hcd, int index)
+{
+ __le32 __iomem **port_array;
+
+ xhci_get_ports(hcd, &port_array);
+ return port_array[index];
+}
+
+/*
+ * xhci_set_port_power() must be called with xhci->lock held.
+ * It will release and re-aquire the lock while calling ACPI
+ * method.
+ */
+static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd,
+ u16 index, bool on, unsigned long *flags)
+{
+ __le32 __iomem *addr;
+ u32 temp;
+
+ addr = xhci_get_port_io_addr(hcd, index);
+ temp = readl(addr);
+ temp = xhci_port_state_to_neutral(temp);
+ if (on) {
+ /* Power on */
+ writel(temp | PORT_POWER, addr);
+ temp = readl(addr);
+ xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n",
+ index, temp);
+ } else {
+ /* Power off */
+ writel(temp & ~PORT_POWER, addr);
+ }
+
+ spin_unlock_irqrestore(&xhci->lock, *flags);
+ temp = usb_acpi_power_manageable(hcd->self.root_hub,
+ index);
+ if (temp)
+ usb_acpi_set_power_state(hcd->self.root_hub,
+ index, on);
+ spin_lock_irqsave(&xhci->lock, *flags);
+}
+
+static void xhci_port_set_test_mode(struct xhci_hcd *xhci,
+ u16 test_mode, u16 wIndex)
+{
+ u32 temp;
+ __le32 __iomem *addr;
+
+ /* xhci only supports test mode for usb2 ports, i.e. xhci->main_hcd */
+ addr = xhci_get_port_io_addr(xhci->main_hcd, wIndex);
+ temp = readl(addr + PORTPMSC);
+ temp |= test_mode << PORT_TEST_MODE_SHIFT;
+ writel(temp, addr + PORTPMSC);
+ xhci->test_mode = test_mode;
+ if (test_mode == TEST_FORCE_EN)
+ xhci_start(xhci);
+}
+
+static int xhci_enter_test_mode(struct xhci_hcd *xhci,
+ u16 test_mode, u16 wIndex, unsigned long *flags)
+{
+ int i, retval;
+
+ /* Disable all Device Slots */
+ xhci_dbg(xhci, "Disable all slots\n");
+ for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
+ retval = xhci_disable_slot(xhci, NULL, i);
+ if (retval)
+ xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
+ i, retval);
+ }
+ /* Put all ports to the Disable state by clear PP */
+ xhci_dbg(xhci, "Disable all port (PP = 0)\n");
+ /* Power off USB3 ports*/
+ for (i = 0; i < xhci->num_usb3_ports; i++)
+ xhci_set_port_power(xhci, xhci->shared_hcd, i, false, flags);
+ /* Power off USB2 ports*/
+ for (i = 0; i < xhci->num_usb2_ports; i++)
+ xhci_set_port_power(xhci, xhci->main_hcd, i, false, flags);
+ /* Stop the controller */
+ xhci_dbg(xhci, "Stop controller\n");
+ retval = xhci_halt(xhci);
+ if (retval)
+ return retval;
+ /* Disable runtime PM for test mode */
+ pm_runtime_forbid(xhci_to_hcd(xhci)->self.controller);
+ /* Set PORTPMSC.PTC field to enter selected test mode */
+ /* Port is selected by wIndex. port_id = wIndex + 1 */
+ xhci_dbg(xhci, "Enter Test Mode: %d, Port_id=%d\n",
+ test_mode, wIndex + 1);
+ xhci_port_set_test_mode(xhci, test_mode, wIndex);
+ return retval;
+}
+
+static int xhci_exit_test_mode(struct xhci_hcd *xhci)
+{
+ int retval;
+
+ if (!xhci->test_mode) {
+ xhci_err(xhci, "Not in test mode, do nothing.\n");
+ return 0;
+ }
+ if (xhci->test_mode == TEST_FORCE_EN &&
+ !(xhci->xhc_state & XHCI_STATE_HALTED)) {
+ retval = xhci_halt(xhci);
+ if (retval)
+ return retval;
+ }
+ pm_runtime_allow(xhci_to_hcd(xhci)->self.controller);
+ xhci->test_mode = 0;
+ return xhci_reset(xhci);
+}
+
void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
int port_id, u32 link_state)
{
@@ -895,6 +1006,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 link_state = 0;
u16 wake_mask = 0;
u16 timeout = 0;
+ u16 test_mode = 0;
max_ports = xhci_get_ports(hcd, &port_array);
bus_state = &xhci->bus_state[hcd_index(hcd)];
@@ -935,7 +1047,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
wIndex--;
temp = readl(port_array[wIndex]);
- if (temp == 0xffffffff) {
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
retval = -ENODEV;
break;
}
@@ -968,6 +1081,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
link_state = (wIndex & 0xff00) >> 3;
if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
wake_mask = wIndex & 0xff00;
+ if (wValue == USB_PORT_FEAT_TEST)
+ test_mode = (wIndex & 0xff00) >> 8;
/* The MSB of wIndex is the U1/U2 timeout */
timeout = (wIndex & 0xff00) >> 8;
wIndex &= 0xff;
@@ -975,7 +1090,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
wIndex--;
temp = readl(port_array[wIndex]);
- if (temp == 0xffffffff) {
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
retval = -ENODEV;
break;
}
@@ -1092,18 +1208,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
* However, hub_wq will ignore the roothub events until
* the roothub is registered.
*/
- writel(temp | PORT_POWER, port_array[wIndex]);
-
- temp = readl(port_array[wIndex]);
- xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp);
-
- spin_unlock_irqrestore(&xhci->lock, flags);
- temp = usb_acpi_power_manageable(hcd->self.root_hub,
- wIndex);
- if (temp)
- usb_acpi_set_power_state(hcd->self.root_hub,
- wIndex, true);
- spin_lock_irqsave(&xhci->lock, flags);
+ xhci_set_port_power(xhci, hcd, wIndex, true, &flags);
break;
case USB_PORT_FEAT_RESET:
temp = (temp | PORT_RESET);
@@ -1142,6 +1247,15 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
temp |= PORT_U2_TIMEOUT(timeout);
writel(temp, port_array[wIndex] + PORTPMSC);
break;
+ case USB_PORT_FEAT_TEST:
+ /* 4.19.6 Port Test Modes (USB2 Test Mode) */
+ if (hcd->speed != HCD_USB2)
+ goto error;
+ if (test_mode > TEST_FORCE_EN || test_mode < TEST_J)
+ goto error;
+ retval = xhci_enter_test_mode(xhci, test_mode, wIndex,
+ &flags);
+ break;
default:
goto error;
}
@@ -1153,7 +1267,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
wIndex--;
temp = readl(port_array[wIndex]);
- if (temp == 0xffffffff) {
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
retval = -ENODEV;
break;
}
@@ -1207,15 +1322,10 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
port_array[wIndex], temp);
break;
case USB_PORT_FEAT_POWER:
- writel(temp & ~PORT_POWER, port_array[wIndex]);
-
- spin_unlock_irqrestore(&xhci->lock, flags);
- temp = usb_acpi_power_manageable(hcd->self.root_hub,
- wIndex);
- if (temp)
- usb_acpi_set_power_state(hcd->self.root_hub,
- wIndex, false);
- spin_lock_irqsave(&xhci->lock, flags);
+ xhci_set_port_power(xhci, hcd, wIndex, false, &flags);
+ break;
+ case USB_PORT_FEAT_TEST:
+ retval = xhci_exit_test_mode(xhci);
break;
default:
goto error;
@@ -1269,7 +1379,8 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
/* For each port, did anything change? If so, set that bit in buf. */
for (i = 0; i < max_ports; i++) {
temp = readl(port_array[i]);
- if (temp == 0xffffffff) {
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
retval = -ENODEV;
break;
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-28 00:43:38 +0200