diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 85 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
2 files changed, 87 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 04344c14180c..a0545fc367ca 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -583,6 +583,77 @@ static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, 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) +{ + 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); + /* Power off USB2 ports*/ + for (i = 0; i < xhci->num_usb2_ports; i++) + xhci_set_port_power(xhci, xhci->main_hcd, i, false); + /* 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) { @@ -938,6 +1009,7 @@ 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)]; @@ -1011,6 +1083,8 @@ 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; @@ -1174,6 +1248,14 @@ 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); + break; default: goto error; } @@ -1241,6 +1323,9 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, case USB_PORT_FEAT_POWER: xhci_set_port_power(xhci, hcd, wIndex, false); break; + case USB_PORT_FEAT_TEST: + retval = xhci_exit_test_mode(xhci); + break; default: goto error; } diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 4e12c8cb557a..675d552e420e 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -425,6 +425,7 @@ struct xhci_op_regs { #define PORT_L1DS_MASK (0xff << 8) #define PORT_L1DS(p) (((p) & 0xff) << 8) #define PORT_HLE (1 << 16) +#define PORT_TEST_MODE_SHIFT 28 /* USB3 Protocol PORTLI Port Link Information */ #define PORT_RX_LANES(p) (((p) >> 16) & 0xf) @@ -1843,6 +1844,7 @@ struct xhci_hcd { /* Compliance Mode Recovery Data */ struct timer_list comp_mode_recovery_timer; u32 port_status_u0; + u16 test_mode; /* Compliance Mode Timer Triggered every 2 seconds */ #define COMP_MODE_RCVRY_MSECS 2000 |