| /* |
| * xHCI host controller driver |
| * |
| * Copyright (C) 2008 Intel Corp. |
| * |
| * Author: Sarah Sharp |
| * Some code borrowed from the Linux EHCI driver. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/gfp.h> |
| #include <linux/slab.h> |
| #include <asm/unaligned.h> |
| |
| #include "xhci.h" |
| |
| #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E) |
| #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) |
| { |
| u16 temp; |
| |
| desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ |
| desc->bHubContrCurrent = 0; |
| |
| desc->bNbrPorts = ports; |
| temp = 0; |
| /* Bits 1:0 - support per-port power switching, or power always on */ |
| if (HCC_PPC(xhci->hcc_params)) |
| temp |= HUB_CHAR_INDV_PORT_LPSM; |
| else |
| temp |= HUB_CHAR_NO_LPSM; |
| /* Bit 2 - root hubs are not part of a compound device */ |
| /* Bits 4:3 - individual port over current protection */ |
| temp |= HUB_CHAR_INDV_PORT_OCPM; |
| /* Bits 6:5 - no TTs in root ports */ |
| /* Bit 7 - no port indicators */ |
| desc->wHubCharacteristics = cpu_to_le16(temp); |
| } |
| |
| /* Fill in the USB 2.0 roothub descriptor */ |
| static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
| struct usb_hub_descriptor *desc) |
| { |
| int ports; |
| u16 temp; |
| __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; |
| u32 portsc; |
| unsigned int i; |
| |
| ports = xhci->num_usb2_ports; |
| |
| xhci_common_hub_descriptor(xhci, desc, ports); |
| desc->bDescriptorType = USB_DT_HUB; |
| temp = 1 + (ports / 8); |
| desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp; |
| |
| /* The Device Removable bits are reported on a byte granularity. |
| * If the port doesn't exist within that byte, the bit is set to 0. |
| */ |
| memset(port_removable, 0, sizeof(port_removable)); |
| for (i = 0; i < ports; i++) { |
| portsc = xhci_readl(xhci, xhci->usb2_ports[i]); |
| /* If a device is removable, PORTSC reports a 0, same as in the |
| * hub descriptor DeviceRemovable bits. |
| */ |
| if (portsc & PORT_DEV_REMOVE) |
| /* This math is hairy because bit 0 of DeviceRemovable |
| * is reserved, and bit 1 is for port 1, etc. |
| */ |
| port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8); |
| } |
| |
| /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN |
| * ports on it. The USB 2.0 specification says that there are two |
| * variable length fields at the end of the hub descriptor: |
| * DeviceRemovable and PortPwrCtrlMask. But since we can have less than |
| * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array |
| * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to |
| * 0xFF, so we initialize the both arrays (DeviceRemovable and |
| * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each |
| * set of ports that actually exist. |
| */ |
| memset(desc->u.hs.DeviceRemovable, 0xff, |
| sizeof(desc->u.hs.DeviceRemovable)); |
| memset(desc->u.hs.PortPwrCtrlMask, 0xff, |
| sizeof(desc->u.hs.PortPwrCtrlMask)); |
| |
| for (i = 0; i < (ports + 1 + 7) / 8; i++) |
| memset(&desc->u.hs.DeviceRemovable[i], port_removable[i], |
| sizeof(__u8)); |
| } |
| |
| /* Fill in the USB 3.0 roothub descriptor */ |
| static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
| struct usb_hub_descriptor *desc) |
| { |
| int ports; |
| u16 port_removable; |
| u32 portsc; |
| unsigned int i; |
| |
| ports = xhci->num_usb3_ports; |
| xhci_common_hub_descriptor(xhci, desc, ports); |
| desc->bDescriptorType = USB_DT_SS_HUB; |
| desc->bDescLength = USB_DT_SS_HUB_SIZE; |
| |
| /* header decode latency should be zero for roothubs, |
| * see section 4.23.5.2. |
| */ |
| desc->u.ss.bHubHdrDecLat = 0; |
| desc->u.ss.wHubDelay = 0; |
| |
| port_removable = 0; |
| /* bit 0 is reserved, bit 1 is for port 1, etc. */ |
| for (i = 0; i < ports; i++) { |
| portsc = xhci_readl(xhci, xhci->usb3_ports[i]); |
| if (portsc & PORT_DEV_REMOVE) |
| port_removable |= 1 << (i + 1); |
| } |
| memset(&desc->u.ss.DeviceRemovable, |
| (__force __u16) cpu_to_le16(port_removable), |
| sizeof(__u16)); |
| } |
| |
| static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
| struct usb_hub_descriptor *desc) |
| { |
| |
| if (hcd->speed == HCD_USB3) |
| xhci_usb3_hub_descriptor(hcd, xhci, desc); |
| else |
| xhci_usb2_hub_descriptor(hcd, xhci, desc); |
| |
| } |
| |
| static unsigned int xhci_port_speed(unsigned int port_status) |
| { |
| if (DEV_LOWSPEED(port_status)) |
| return USB_PORT_STAT_LOW_SPEED; |
| if (DEV_HIGHSPEED(port_status)) |
| return USB_PORT_STAT_HIGH_SPEED; |
| /* |
| * FIXME: Yes, we should check for full speed, but the core uses that as |
| * a default in portspeed() in usb/core/hub.c (which is the only place |
| * USB_PORT_STAT_*_SPEED is used). |
| */ |
| return 0; |
| } |
| |
| /* |
| * These bits are Read Only (RO) and should be saved and written to the |
| * registers: 0, 3, 10:13, 30 |
| * connect status, over-current status, port speed, and device removable. |
| * connect status and port speed are also sticky - meaning they're in |
| * the AUX well and they aren't changed by a hot, warm, or cold reset. |
| */ |
| #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30)) |
| /* |
| * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: |
| * bits 5:8, 9, 14:15, 25:27 |
| * link state, port power, port indicator state, "wake on" enable state |
| */ |
| #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25)) |
| /* |
| * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: |
| * bit 4 (port reset) |
| */ |
| #define XHCI_PORT_RW1S ((1<<4)) |
| /* |
| * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: |
| * bits 1, 17, 18, 19, 20, 21, 22, 23 |
| * port enable/disable, and |
| * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports), |
| * over-current, reset, link state, and L1 change |
| */ |
| #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17)) |
| /* |
| * Bit 16 is RW, and writing a '1' to it causes the link state control to be |
| * latched in |
| */ |
| #define XHCI_PORT_RW ((1<<16)) |
| /* |
| * These bits are Reserved Zero (RsvdZ) and zero should be written to them: |
| * bits 2, 24, 28:31 |
| */ |
| #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28)) |
| |
| /* |
| * Given a port state, this function returns a value that would result in the |
| * port being in the same state, if the value was written to the port status |
| * control register. |
| * Save Read Only (RO) bits and save read/write bits where |
| * writing a 0 clears the bit and writing a 1 sets the bit (RWS). |
| * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. |
| */ |
| u32 xhci_port_state_to_neutral(u32 state) |
| { |
| /* Save read-only status and port state */ |
| return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); |
| } |
| |
| /* |
| * find slot id based on port number. |
| * @port: The one-based port number from one of the two split roothubs. |
| */ |
| int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
| u16 port) |
| { |
| int slot_id; |
| int i; |
| enum usb_device_speed speed; |
| |
| slot_id = 0; |
| for (i = 0; i < MAX_HC_SLOTS; i++) { |
| if (!xhci->devs[i]) |
| continue; |
| speed = xhci->devs[i]->udev->speed; |
| if (((speed == USB_SPEED_SUPER) == (hcd->speed == HCD_USB3)) |
| && xhci->devs[i]->fake_port == port) { |
| slot_id = i; |
| break; |
| } |
| } |
| |
| return slot_id; |
| } |
| |
| /* |
| * Stop device |
| * It issues stop endpoint command for EP 0 to 30. And wait the last command |
| * to complete. |
| * suspend will set to 1, if suspend bit need to set in command. |
| */ |
| static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend) |
| { |
| struct xhci_virt_device *virt_dev; |
| struct xhci_command *cmd; |
| unsigned long flags; |
| int timeleft; |
| int ret; |
| int i; |
| |
| ret = 0; |
| virt_dev = xhci->devs[slot_id]; |
| cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); |
| if (!cmd) { |
| xhci_dbg(xhci, "Couldn't allocate command structure.\n"); |
| return -ENOMEM; |
| } |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| for (i = LAST_EP_INDEX; i > 0; i--) { |
| if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) |
| xhci_queue_stop_endpoint(xhci, slot_id, i, suspend); |
| } |
| cmd->command_trb = xhci->cmd_ring->enqueue; |
| list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list); |
| xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend); |
| xhci_ring_cmd_db(xhci); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| |
| /* Wait for last stop endpoint command to finish */ |
| timeleft = wait_for_completion_interruptible_timeout( |
| cmd->completion, |
| USB_CTRL_SET_TIMEOUT); |
| if (timeleft <= 0) { |
| xhci_warn(xhci, "%s while waiting for stop endpoint command\n", |
| timeleft == 0 ? "Timeout" : "Signal"); |
| spin_lock_irqsave(&xhci->lock, flags); |
| /* The timeout might have raced with the event ring handler, so |
| * only delete from the list if the item isn't poisoned. |
| */ |
| if (cmd->cmd_list.next != LIST_POISON1) |
| list_del(&cmd->cmd_list); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| ret = -ETIME; |
| goto command_cleanup; |
| } |
| |
| command_cleanup: |
| xhci_free_command(xhci, cmd); |
| return ret; |
| } |
| |
| /* |
| * Ring device, it rings the all doorbells unconditionally. |
| */ |
| void xhci_ring_device(struct xhci_hcd *xhci, int slot_id) |
| { |
| int i; |
| |
| for (i = 0; i < LAST_EP_INDEX + 1; i++) |
| if (xhci->devs[slot_id]->eps[i].ring && |
| xhci->devs[slot_id]->eps[i].ring->dequeue) |
| xhci_ring_ep_doorbell(xhci, slot_id, i, 0); |
| |
| return; |
| } |
| |
| static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
| u16 wIndex, __le32 __iomem *addr, u32 port_status) |
| { |
| /* Don't allow the USB core to disable SuperSpeed ports. */ |
| if (hcd->speed == HCD_USB3) { |
| xhci_dbg(xhci, "Ignoring request to disable " |
| "SuperSpeed port.\n"); |
| return; |
| } |
| |
| /* Write 1 to disable the port */ |
| xhci_writel(xhci, port_status | PORT_PE, addr); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| port_status = xhci_readl(xhci, addr); |
| xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n", |
| wIndex, port_status); |
| } |
| |
| static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, |
| u16 wIndex, __le32 __iomem *addr, u32 port_status) |
| { |
| char *port_change_bit; |
| u32 status; |
| |
| switch (wValue) { |
| case USB_PORT_FEAT_C_RESET: |
| status = PORT_RC; |
| port_change_bit = "reset"; |
| break; |
| case USB_PORT_FEAT_C_BH_PORT_RESET: |
| status = PORT_WRC; |
| port_change_bit = "warm(BH) reset"; |
| break; |
| case USB_PORT_FEAT_C_CONNECTION: |
| status = PORT_CSC; |
| port_change_bit = "connect"; |
| break; |
| case USB_PORT_FEAT_C_OVER_CURRENT: |
| status = PORT_OCC; |
| port_change_bit = "over-current"; |
| break; |
| case USB_PORT_FEAT_C_ENABLE: |
| status = PORT_PEC; |
| port_change_bit = "enable/disable"; |
| break; |
| case USB_PORT_FEAT_C_SUSPEND: |
| status = PORT_PLC; |
| port_change_bit = "suspend/resume"; |
| break; |
| case USB_PORT_FEAT_C_PORT_LINK_STATE: |
| status = PORT_PLC; |
| port_change_bit = "link state"; |
| break; |
| default: |
| /* Should never happen */ |
| return; |
| } |
| /* Change bits are all write 1 to clear */ |
| xhci_writel(xhci, port_status | status, addr); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| port_status = xhci_readl(xhci, addr); |
| xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n", |
| port_change_bit, wIndex, port_status); |
| } |
| |
| static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array) |
| { |
| int max_ports; |
| struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| |
| if (hcd->speed == HCD_USB3) { |
| max_ports = xhci->num_usb3_ports; |
| *port_array = xhci->usb3_ports; |
| } else { |
| max_ports = xhci->num_usb2_ports; |
| *port_array = xhci->usb2_ports; |
| } |
| |
| 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]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| |
| void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, |
| __le32 __iomem **port_array, int port_id, u16 wake_mask) |
| { |
| u32 temp; |
| |
| temp = xhci_readl(xhci, port_array[port_id]); |
| temp = xhci_port_state_to_neutral(temp); |
| |
| if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT) |
| temp |= PORT_WKCONN_E; |
| else |
| temp &= ~PORT_WKCONN_E; |
| |
| if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT) |
| temp |= PORT_WKDISC_E; |
| else |
| temp &= ~PORT_WKDISC_E; |
| |
| if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT) |
| temp |= PORT_WKOC_E; |
| else |
| temp &= ~PORT_WKOC_E; |
| |
| xhci_writel(xhci, temp, port_array[port_id]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| |
| /* 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]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| } |
| |
| static void xhci_single_step_completion(struct urb *urb) |
| { |
| struct completion *done = urb->context; |
| |
| complete(done); |
| } |
| |
| /* |
| * Allocate a URB and initialize the various fields of it. |
| * This API is used by the single_step_set_feature test of |
| * EHSET where IN packet of the GetDescriptor request is |
| * sent 15secs after the SETUP packet. |
| * Return NULL if failed. |
| */ |
| static struct urb *xhci_request_single_step_set_feature_urb( |
| struct usb_device *udev, |
| void *dr, |
| void *buf, |
| struct completion *done) |
| { |
| struct urb *urb; |
| struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| struct usb_host_endpoint *ep; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) |
| return NULL; |
| |
| urb->pipe = usb_rcvctrlpipe(udev, 0); |
| ep = udev->ep_in[usb_pipeendpoint(urb->pipe)]; |
| if (!ep) { |
| usb_free_urb(urb); |
| return NULL; |
| } |
| |
| /* |
| * Initialize the various URB fields as these are used by the HCD |
| * driver to queue it and as well as when completion happens. |
| */ |
| urb->ep = ep; |
| urb->dev = udev; |
| urb->setup_packet = dr; |
| urb->transfer_buffer = buf; |
| urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; |
| urb->complete = xhci_single_step_completion; |
| urb->status = -EINPROGRESS; |
| urb->actual_length = 0; |
| urb->transfer_flags = URB_DIR_IN; |
| usb_get_urb(urb); |
| atomic_inc(&urb->use_count); |
| atomic_inc(&urb->dev->urbnum); |
| usb_hcd_map_urb_for_dma(hcd, urb, GFP_KERNEL); |
| urb->context = done; |
| return urb; |
| } |
| |
| /* |
| * This function implements the USB_PORT_FEAT_TEST handling of the |
| * SINGLE_STEP_SET_FEATURE test mode as defined in the Embedded |
| * High-Speed Electrical Test (EHSET) specification. This simply |
| * issues a GetDescriptor control transfer, with an inserted 15-second |
| * delay after the end of the SETUP stage and before the IN token of |
| * the DATA stage is set. The idea is that this gives the test operator |
| * enough time to configure the oscilloscope to perform a measurement |
| * of the response time between the DATA and ACK packets that follow. |
| */ |
| static int xhci_ehset_single_step_set_feature(struct usb_hcd *hcd, int port) |
| { |
| int retval = -ENOMEM; |
| struct usb_ctrlrequest *dr; |
| struct urb *urb; |
| struct usb_device *udev; |
| struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| struct usb_device_descriptor *buf; |
| unsigned long flags; |
| DECLARE_COMPLETION_ONSTACK(done); |
| |
| /* Obtain udev of the rhub's child port */ |
| udev = hcd->self.root_hub->children[port]; |
| if (!udev) { |
| xhci_err(xhci, "No device attached to the RootHub\n"); |
| return -ENODEV; |
| } |
| buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
| if (!dr) { |
| kfree(buf); |
| return -ENOMEM; |
| } |
| |
| /* Fill Setup packet for GetDescriptor */ |
| dr->bRequestType = USB_DIR_IN; |
| dr->bRequest = USB_REQ_GET_DESCRIPTOR; |
| dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); |
| dr->wIndex = 0; |
| dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); |
| urb = xhci_request_single_step_set_feature_urb(udev, dr, buf, &done); |
| if (!urb) |
| goto cleanup; |
| |
| /* Now complete just the SETUP stage */ |
| spin_lock_irqsave(&xhci->lock, flags); |
| retval = xhci_submit_single_step_set_feature(hcd, urb, 1); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| if (retval) |
| goto out1; |
| |
| if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { |
| usb_kill_urb(urb); |
| retval = -ETIMEDOUT; |
| xhci_err(xhci, "%s SETUP stage timed out on ep0\n", __func__); |
| goto out1; |
| } |
| |
| /* Sleep for 15 seconds; HC will send SOFs during this period */ |
| msleep(15 * 1000); |
| |
| /* Complete remaining DATA and status stages. Re-use same URB */ |
| urb->status = -EINPROGRESS; |
| usb_get_urb(urb); |
| atomic_inc(&urb->use_count); |
| atomic_inc(&urb->dev->urbnum); |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| retval = xhci_submit_single_step_set_feature(hcd, urb, 0); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| if (!retval && !wait_for_completion_timeout(&done, |
| msecs_to_jiffies(2000))) { |
| usb_kill_urb(urb); |
| retval = -ETIMEDOUT; |
| xhci_err(xhci, "%s IN stage timed out on ep0\n", __func__); |
| } |
| out1: |
| usb_free_urb(urb); |
| cleanup: |
| kfree(dr); |
| kfree(buf); |
| return retval; |
| } |
| |
| 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, status; |
| int retval = 0; |
| __le32 __iomem **port_array; |
| int slot_id; |
| struct xhci_bus_state *bus_state; |
| u16 link_state = 0; |
| u16 wake_mask = 0; |
| u16 test_mode = 0; |
| |
| max_ports = xhci_get_ports(hcd, &port_array); |
| bus_state = &xhci->bus_state[hcd_index(hcd)]; |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| switch (typeReq) { |
| case GetHubStatus: |
| /* No power source, over-current reported per port */ |
| memset(buf, 0, 4); |
| break; |
| case GetHubDescriptor: |
| /* Check to make sure userspace is asking for the USB 3.0 hub |
| * descriptor for the USB 3.0 roothub. If not, we stall the |
| * endpoint, like external hubs do. |
| */ |
| if (hcd->speed == HCD_USB3 && |
| (wLength < USB_DT_SS_HUB_SIZE || |
| wValue != (USB_DT_SS_HUB << 8))) { |
| xhci_dbg(xhci, "Wrong hub descriptor type for " |
| "USB 3.0 roothub.\n"); |
| goto error; |
| } |
| 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; |
| wIndex--; |
| status = 0; |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| if (temp == 0xffffffff) { |
| retval = -ENODEV; |
| break; |
| } |
| xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n", wIndex, temp); |
| |
| /* wPortChange bits */ |
| if (temp & PORT_CSC) |
| status |= USB_PORT_STAT_C_CONNECTION << 16; |
| if (temp & PORT_PEC) |
| status |= USB_PORT_STAT_C_ENABLE << 16; |
| if ((temp & PORT_OCC)) |
| status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
| if ((temp & PORT_RC)) |
| status |= USB_PORT_STAT_C_RESET << 16; |
| /* USB3.0 only */ |
| if (hcd->speed == HCD_USB3) { |
| if ((temp & PORT_PLC)) |
| status |= USB_PORT_STAT_C_LINK_STATE << 16; |
| if ((temp & PORT_WRC)) |
| status |= USB_PORT_STAT_C_BH_RESET << 16; |
| } |
| |
| if (hcd->speed != HCD_USB3) { |
| if ((temp & PORT_PLS_MASK) == XDEV_U3 |
| && (temp & PORT_POWER)) |
| status |= USB_PORT_STAT_SUSPEND; |
| } |
| if ((temp & PORT_PLS_MASK) == XDEV_RESUME && |
| !DEV_SUPERSPEED(temp)) { |
| if ((temp & PORT_RESET) || !(temp & PORT_PE)) |
| goto error; |
| if (time_after_eq(jiffies, |
| bus_state->resume_done[wIndex])) { |
| xhci_dbg(xhci, "Resume USB2 port %d\n", |
| wIndex + 1); |
| bus_state->resume_done[wIndex] = 0; |
| 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, |
| wIndex + 1); |
| if (!slot_id) { |
| xhci_dbg(xhci, "slot_id is zero\n"); |
| goto error; |
| } |
| xhci_ring_device(xhci, slot_id); |
| bus_state->port_c_suspend |= 1 << wIndex; |
| bus_state->suspended_ports &= ~(1 << wIndex); |
| } else { |
| /* |
| * The resume has been signaling for less than |
| * 20ms. Report the port status as SUSPEND, |
| * let the usbcore check port status again |
| * and clear resume signaling later. |
| */ |
| status |= USB_PORT_STAT_SUSPEND; |
| } |
| } |
| if ((temp & PORT_PLS_MASK) == XDEV_U0 |
| && (temp & PORT_POWER) |
| && (bus_state->suspended_ports & (1 << wIndex))) { |
| bus_state->suspended_ports &= ~(1 << wIndex); |
| if (hcd->speed != HCD_USB3) |
| bus_state->port_c_suspend |= 1 << wIndex; |
| } |
| if (temp & PORT_CONNECT) { |
| status |= USB_PORT_STAT_CONNECTION; |
| status |= xhci_port_speed(temp); |
| } |
| if (temp & PORT_PE) |
| status |= USB_PORT_STAT_ENABLE; |
| if (temp & PORT_OC) |
| status |= USB_PORT_STAT_OVERCURRENT; |
| if (temp & PORT_RESET) |
| status |= USB_PORT_STAT_RESET; |
| if (temp & PORT_POWER) { |
| if (hcd->speed == HCD_USB3) |
| status |= USB_SS_PORT_STAT_POWER; |
| else |
| status |= USB_PORT_STAT_POWER; |
| } |
| /* Port Link State */ |
| if (hcd->speed == HCD_USB3) { |
| /* resume state is a xHCI internal state. |
| * Do not report it to usb core. |
| */ |
| if ((temp & PORT_PLS_MASK) != XDEV_RESUME) |
| status |= (temp & PORT_PLS_MASK); |
| } |
| if (bus_state->port_c_suspend & (1 << wIndex)) |
| status |= 1 << USB_PORT_FEAT_C_SUSPEND; |
| xhci_dbg(xhci, "Get port status returned 0x%x\n", status); |
| put_unaligned(cpu_to_le32(status), (__le32 *) buf); |
| break; |
| case SetPortFeature: |
| /* The MSB of wIndex is the TEST Mode */ |
| test_mode = (wIndex & 0xff00) >> 8; |
| if (wValue == USB_PORT_FEAT_LINK_STATE) |
| link_state = (wIndex & 0xff00) >> 3; |
| if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK) |
| wake_mask = wIndex & 0xff00; |
| wIndex &= 0xff; |
| if (!wIndex || wIndex > max_ports) |
| goto error; |
| wIndex--; |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| if (temp == 0xffffffff) { |
| retval = -ENODEV; |
| break; |
| } |
| temp = xhci_port_state_to_neutral(temp); |
| /* FIXME: What new port features do we need to support? */ |
| 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 " |
| "not in U0/U1/U2.\n"); |
| goto error; |
| } |
| |
| slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
| wIndex + 1); |
| if (!slot_id) { |
| xhci_warn(xhci, "slot_id is zero\n"); |
| goto error; |
| } |
| /* unlock to execute stop endpoint commands */ |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| xhci_stop_device(xhci, slot_id, 1); |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3); |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(10); /* wait device to enter */ |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| bus_state->suspended_ports |= 1 << wIndex; |
| break; |
| case USB_PORT_FEAT_LINK_STATE: |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| /* Software should not attempt to set |
| * port link state above '5' (Rx.Detect) and the port |
| * must be enabled. |
| */ |
| if ((temp & PORT_PE) == 0 || |
| (link_state > USB_SS_PORT_LS_RX_DETECT)) { |
| xhci_warn(xhci, "Cannot set link state.\n"); |
| goto error; |
| } |
| |
| if (link_state == USB_SS_PORT_LS_U3) { |
| slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
| wIndex + 1); |
| if (slot_id) { |
| /* unlock to execute stop endpoint |
| * commands */ |
| spin_unlock_irqrestore(&xhci->lock, |
| flags); |
| xhci_stop_device(xhci, slot_id, 1); |
| spin_lock_irqsave(&xhci->lock, flags); |
| } |
| } |
| |
| xhci_set_link_state(xhci, port_array, wIndex, |
| link_state); |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(20); /* wait device to enter */ |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| if (link_state == USB_SS_PORT_LS_U3) |
| bus_state->suspended_ports |= 1 << wIndex; |
| break; |
| case USB_PORT_FEAT_POWER: |
| /* |
| * Turn on ports, even if there isn't per-port switching. |
| * HC will report connect events even before this is set. |
| * However, khubd will ignore the roothub events until |
| * the roothub is registered. |
| */ |
| xhci_writel(xhci, temp | PORT_POWER, |
| port_array[wIndex]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp); |
| break; |
| case USB_PORT_FEAT_RESET: |
| temp = (temp | PORT_RESET); |
| xhci_writel(xhci, temp, port_array[wIndex]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); |
| break; |
| case USB_PORT_FEAT_REMOTE_WAKE_MASK: |
| xhci_set_remote_wake_mask(xhci, port_array, |
| wIndex, wake_mask); |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| xhci_dbg(xhci, "set port remote wake mask, " |
| "actual port %d status = 0x%x\n", |
| wIndex, temp); |
| break; |
| case USB_PORT_FEAT_BH_PORT_RESET: |
| temp |= PORT_WR; |
| xhci_writel(xhci, temp, port_array[wIndex]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| break; |
| case USB_PORT_FEAT_TEST: |
| slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
| wIndex + 1); |
| if (test_mode && test_mode <= 5) { |
| /* unlock to execute stop endpoint commands */ |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| xhci_stop_device(xhci, slot_id, 1); |
| spin_lock_irqsave(&xhci->lock, flags); |
| xhci_halt(xhci); |
| |
| temp = xhci_readl(xhci, port_array[wIndex] + 1); |
| temp |= test_mode << 28; |
| xhci_writel(xhci, temp, port_array[wIndex] + 1); |
| } else if (test_mode == 6) { |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| retval = xhci_ehset_single_step_set_feature(hcd, |
| wIndex); |
| spin_lock_irqsave(&xhci->lock, flags); |
| } else { |
| goto error; |
| } |
| break; |
| default: |
| goto error; |
| } |
| /* unblock any posted writes */ |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| break; |
| case ClearPortFeature: |
| if (!wIndex || wIndex > max_ports) |
| goto error; |
| wIndex--; |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| if (temp == 0xffffffff) { |
| retval = -ENODEV; |
| break; |
| } |
| /* FIXME: What new port features do we need to support? */ |
| temp = xhci_port_state_to_neutral(temp); |
| switch (wValue) { |
| case USB_PORT_FEAT_SUSPEND: |
| temp = xhci_readl(xhci, port_array[wIndex]); |
| xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); |
| xhci_dbg(xhci, "PORTSC %04x\n", temp); |
| if (temp & PORT_RESET) |
| goto error; |
| if ((temp & PORT_PLS_MASK) == XDEV_U3) { |
| if ((temp & PORT_PE) == 0) |
| goto error; |
| |
| xhci_set_link_state(xhci, port_array, wIndex, |
| XDEV_RESUME); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(20); |
| spin_lock_irqsave(&xhci->lock, flags); |
| xhci_set_link_state(xhci, port_array, wIndex, |
| XDEV_U0); |
| } |
| bus_state->port_c_suspend |= 1 << wIndex; |
| |
| slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
| wIndex + 1); |
| if (!slot_id) { |
| xhci_dbg(xhci, "slot_id is zero\n"); |
| goto error; |
| } |
| xhci_ring_device(xhci, slot_id); |
| break; |
| case USB_PORT_FEAT_C_SUSPEND: |
| bus_state->port_c_suspend &= ~(1 << wIndex); |
| case USB_PORT_FEAT_C_RESET: |
| case USB_PORT_FEAT_C_BH_PORT_RESET: |
| case USB_PORT_FEAT_C_CONNECTION: |
| case USB_PORT_FEAT_C_OVER_CURRENT: |
| case USB_PORT_FEAT_C_ENABLE: |
| case USB_PORT_FEAT_C_PORT_LINK_STATE: |
| xhci_clear_port_change_bit(xhci, wValue, wIndex, |
| port_array[wIndex], temp); |
| break; |
| case USB_PORT_FEAT_ENABLE: |
| xhci_disable_port(hcd, xhci, wIndex, |
| port_array[wIndex], temp); |
| break; |
| default: |
| goto error; |
| } |
| break; |
| default: |
| error: |
| /* "stall" on error */ |
| retval = -EPIPE; |
| } |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| return retval; |
| } |
| |
| /* |
| * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
| * Ports are 0-indexed from the HCD point of view, |
| * and 1-indexed from the USB core pointer of view. |
| * |
| * Note that the status change bits will be cleared as soon as a port status |
| * change event is generated, so we use the saved status from that event. |
| */ |
| int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) |
| { |
| unsigned long flags; |
| u32 temp, status; |
| u32 mask; |
| int i, retval; |
| struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| int max_ports; |
| __le32 __iomem **port_array; |
| struct xhci_bus_state *bus_state; |
| |
| max_ports = xhci_get_ports(hcd, &port_array); |
| bus_state = &xhci->bus_state[hcd_index(hcd)]; |
| |
| /* Initial status is no changes */ |
| retval = (max_ports + 8) / 8; |
| memset(buf, 0, retval); |
| status = 0; |
| |
| mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC; |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| /* For each port, did anything change? If so, set that bit in buf. */ |
| for (i = 0; i < max_ports; i++) { |
| temp = xhci_readl(xhci, port_array[i]); |
| if (temp == 0xffffffff) { |
| retval = -ENODEV; |
| break; |
| } |
| if ((temp & mask) != 0 || |
| (bus_state->port_c_suspend & 1 << i) || |
| (bus_state->resume_done[i] && time_after_eq( |
| jiffies, bus_state->resume_done[i]))) { |
| buf[(i + 1) / 8] |= 1 << (i + 1) % 8; |
| status = 1; |
| } |
| } |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| return status ? retval : 0; |
| } |
| |
| #ifdef CONFIG_PM |
| |
| int xhci_bus_suspend(struct usb_hcd *hcd) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| int max_ports, port_index; |
| __le32 __iomem **port_array; |
| struct xhci_bus_state *bus_state; |
| unsigned long flags; |
| |
| max_ports = xhci_get_ports(hcd, &port_array); |
| bus_state = &xhci->bus_state[hcd_index(hcd)]; |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| if (hcd->self.root_hub->do_remote_wakeup) { |
| port_index = max_ports; |
| while (port_index--) { |
| if (bus_state->resume_done[port_index] != 0) { |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| xhci_dbg(xhci, "suspend failed because " |
| "port %d is resuming\n", |
| port_index + 1); |
| return -EBUSY; |
| } |
| } |
| } |
| |
| port_index = max_ports; |
| bus_state->bus_suspended = 0; |
| while (port_index--) { |
| /* suspend the port if the port is not suspended */ |
| u32 t1, t2; |
| int slot_id; |
| |
| t1 = xhci_readl(xhci, port_array[port_index]); |
| t2 = xhci_port_state_to_neutral(t1); |
| |
| if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) { |
| xhci_dbg(xhci, "port %d not suspended\n", port_index); |
| slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
| port_index + 1); |
| if (slot_id) { |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| xhci_stop_device(xhci, slot_id, 1); |
| spin_lock_irqsave(&xhci->lock, flags); |
| } |
| t2 &= ~PORT_PLS_MASK; |
| t2 |= PORT_LINK_STROBE | XDEV_U3; |
| set_bit(port_index, &bus_state->bus_suspended); |
| } |
| /* USB core sets remote wake mask for USB 3.0 hubs, |
| * including the USB 3.0 roothub, but only if CONFIG_USB_SUSPEND |
| * is enabled, so also enable remote wake here. |
| */ |
| if (hcd->self.root_hub->do_remote_wakeup) { |
| if (t1 & PORT_CONNECT) { |
| t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
| t2 &= ~PORT_WKCONN_E; |
| } else { |
| t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
| t2 &= ~PORT_WKDISC_E; |
| } |
| } else |
| t2 &= ~PORT_WAKE_BITS; |
| |
| t1 = xhci_port_state_to_neutral(t1); |
| if (t1 != t2) { |
| xhci_writel(xhci, t2, port_array[port_index]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| |
| if (hcd->speed != HCD_USB3) { |
| /* enable remote wake up for USB 2.0 */ |
| __le32 __iomem *addr; |
| u32 tmp; |
| |
| /* Add one to the port status register address to get |
| * the port power control register address. |
| */ |
| addr = port_array[port_index] + 1; |
| tmp = xhci_readl(xhci, addr); |
| tmp |= PORT_RWE; |
| xhci_writel(xhci, tmp, addr); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| } |
| hcd->state = HC_STATE_SUSPENDED; |
| bus_state->next_statechange = jiffies + msecs_to_jiffies(10); |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| return 0; |
| } |
| |
| int xhci_bus_resume(struct usb_hcd *hcd) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| int max_ports, port_index; |
| __le32 __iomem **port_array; |
| struct xhci_bus_state *bus_state; |
| u32 temp; |
| unsigned long flags; |
| |
| max_ports = xhci_get_ports(hcd, &port_array); |
| bus_state = &xhci->bus_state[hcd_index(hcd)]; |
| |
| if (time_before(jiffies, bus_state->next_statechange)) |
| msleep(5); |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| if (!HCD_HW_ACCESSIBLE(hcd)) { |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| return -ESHUTDOWN; |
| } |
| |
| /* delay the irqs */ |
| temp = xhci_readl(xhci, &xhci->op_regs->command); |
| temp &= ~CMD_EIE; |
| xhci_writel(xhci, temp, &xhci->op_regs->command); |
| |
| port_index = max_ports; |
| while (port_index--) { |
| /* Check whether need resume ports. If needed |
| resume port and disable remote wakeup */ |
| u32 temp; |
| int slot_id; |
| |
| temp = xhci_readl(xhci, port_array[port_index]); |
| if (DEV_SUPERSPEED(temp)) |
| temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); |
| else |
| temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
| if (test_bit(port_index, &bus_state->bus_suspended) && |
| (temp & PORT_PLS_MASK)) { |
| if (DEV_SUPERSPEED(temp)) { |
| xhci_set_link_state(xhci, port_array, |
| port_index, XDEV_U0); |
| } else { |
| 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); |
| |
| xhci_set_link_state(xhci, port_array, |
| port_index, XDEV_U0); |
| } |
| /* wait for the port to enter U0 and report port link |
| * state change. |
| */ |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(20); |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| /* Clear PLC */ |
| 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); |
| if (slot_id) |
| xhci_ring_device(xhci, slot_id); |
| } else { |
| xhci_writel(xhci, temp, port_array[port_index]); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| |
| if (hcd->speed != HCD_USB3) { |
| /* disable remote wake up for USB 2.0 */ |
| __le32 __iomem *addr; |
| u32 tmp; |
| |
| /* Add one to the port status register address to get |
| * the port power control register address. |
| */ |
| addr = port_array[port_index] + 1; |
| tmp = xhci_readl(xhci, addr); |
| tmp &= ~PORT_RWE; |
| xhci_writel(xhci, tmp, addr); |
| if (xhci->quirks & XHCI_PORTSC_DELAY) |
| ndelay(100); |
| } |
| } |
| |
| (void) xhci_readl(xhci, &xhci->op_regs->command); |
| |
| bus_state->next_statechange = jiffies + msecs_to_jiffies(5); |
| /* re-enable irqs */ |
| temp = xhci_readl(xhci, &xhci->op_regs->command); |
| temp |= CMD_EIE; |
| xhci_writel(xhci, temp, &xhci->op_regs->command); |
| temp = xhci_readl(xhci, &xhci->op_regs->command); |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| return 0; |
| } |
| |
| #endif /* CONFIG_PM */ |