| /* |
| * 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 <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) |
| |
| static void xhci_hub_descriptor(struct xhci_hcd *xhci, |
| struct usb_hub_descriptor *desc) |
| { |
| int ports; |
| u16 temp; |
| |
| ports = HCS_MAX_PORTS(xhci->hcs_params1); |
| |
| /* USB 3.0 hubs have a different descriptor, but we fake this for now */ |
| desc->bDescriptorType = 0x29; |
| desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ |
| desc->bHubContrCurrent = 0; |
| |
| desc->bNbrPorts = ports; |
| temp = 1 + (ports / 8); |
| desc->bDescLength = 7 + 2 * temp; |
| |
| /* Why does core/hcd.h define bitmap? It's just confusing. */ |
| memset(&desc->DeviceRemovable[0], 0, temp); |
| memset(&desc->DeviceRemovable[temp], 0xff, temp); |
| |
| /* Ugh, these should be #defines, FIXME */ |
| /* Using table 11-13 in USB 2.0 spec. */ |
| temp = 0; |
| /* Bits 1:0 - support port power switching, or power always on */ |
| if (HCC_PPC(xhci->hcc_params)) |
| temp |= 0x0001; |
| else |
| temp |= 0x0002; |
| /* Bit 2 - root hubs are not part of a compound device */ |
| /* Bits 4:3 - individual port over current protection */ |
| temp |= 0x0008; |
| /* Bits 6:5 - no TTs in root ports */ |
| /* Bit 7 - no port indicators */ |
| desc->wHubCharacteristics = (__force __u16) cpu_to_le16(temp); |
| } |
| |
| 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; |
| if (DEV_SUPERSPEED(port_status)) |
| return USB_PORT_STAT_SUPER_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. |
| */ |
| int xhci_find_slot_id_by_port(struct xhci_hcd *xhci, u16 port) |
| { |
| int slot_id; |
| int i; |
| |
| slot_id = 0; |
| for (i = 0; i < MAX_HC_SLOTS; i++) { |
| if (!xhci->devs[i]) |
| continue; |
| if (xhci->devs[i]->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 xhci_hcd *xhci, u16 wIndex, |
| u32 __iomem *addr, u32 port_status) |
| { |
| /* Write 1 to disable the port */ |
| xhci_writel(xhci, port_status | PORT_PE, addr); |
| 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, u32 __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_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; |
| default: |
| /* Should never happen */ |
| return; |
| } |
| /* Change bits are all write 1 to clear */ |
| xhci_writel(xhci, port_status | status, addr); |
| 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); |
| } |
| |
| 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 ports; |
| unsigned long flags; |
| u32 temp, temp1, status; |
| int retval = 0; |
| u32 __iomem *addr; |
| int slot_id; |
| |
| ports = HCS_MAX_PORTS(xhci->hcs_params1); |
| |
| 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: |
| xhci_hub_descriptor(xhci, (struct usb_hub_descriptor *) buf); |
| break; |
| case GetPortStatus: |
| if (!wIndex || wIndex > ports) |
| goto error; |
| wIndex--; |
| status = 0; |
| addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff); |
| temp = xhci_readl(xhci, addr); |
| 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; |
| /* |
| * FIXME ignoring reset and USB 2.1/3.0 specific |
| * changes |
| */ |
| if ((temp & PORT_PLS_MASK) == XDEV_U3 |
| && (temp & PORT_POWER)) |
| status |= 1 << USB_PORT_FEAT_SUSPEND; |
| if ((temp & PORT_PLS_MASK) == XDEV_RESUME) { |
| if ((temp & PORT_RESET) || !(temp & PORT_PE)) |
| goto error; |
| if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies, |
| xhci->resume_done[wIndex])) { |
| xhci_dbg(xhci, "Resume USB2 port %d\n", |
| wIndex + 1); |
| xhci->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, addr); |
| |
| xhci_dbg(xhci, "set port %d resume\n", |
| wIndex + 1); |
| slot_id = xhci_find_slot_id_by_port(xhci, |
| wIndex + 1); |
| if (!slot_id) { |
| xhci_dbg(xhci, "slot_id is zero\n"); |
| goto error; |
| } |
| xhci_ring_device(xhci, slot_id); |
| xhci->port_c_suspend[wIndex >> 5] |= |
| 1 << (wIndex & 31); |
| xhci->suspended_ports[wIndex >> 5] &= |
| ~(1 << (wIndex & 31)); |
| } |
| } |
| if ((temp & PORT_PLS_MASK) == XDEV_U0 |
| && (temp & PORT_POWER) |
| && (xhci->suspended_ports[wIndex >> 5] & |
| (1 << (wIndex & 31)))) { |
| xhci->suspended_ports[wIndex >> 5] &= |
| ~(1 << (wIndex & 31)); |
| xhci->port_c_suspend[wIndex >> 5] |= |
| 1 << (wIndex & 31); |
| } |
| 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) |
| status |= USB_PORT_STAT_POWER; |
| if (xhci->port_c_suspend[wIndex >> 5] & (1 << (wIndex & 31))) |
| 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: |
| wIndex &= 0xff; |
| if (!wIndex || wIndex > ports) |
| goto error; |
| wIndex--; |
| addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff); |
| temp = xhci_readl(xhci, addr); |
| temp = xhci_port_state_to_neutral(temp); |
| switch (wValue) { |
| case USB_PORT_FEAT_SUSPEND: |
| temp = xhci_readl(xhci, addr); |
| /* 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. |
| */ |
| 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(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); |
| |
| temp = xhci_port_state_to_neutral(temp); |
| temp &= ~PORT_PLS_MASK; |
| temp |= PORT_LINK_STROBE | XDEV_U3; |
| xhci_writel(xhci, temp, addr); |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(10); /* wait device to enter */ |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| temp = xhci_readl(xhci, addr); |
| xhci->suspended_ports[wIndex >> 5] |= |
| 1 << (wIndex & (31)); |
| 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, addr); |
| |
| temp = xhci_readl(xhci, addr); |
| 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, addr); |
| |
| temp = xhci_readl(xhci, addr); |
| xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); |
| break; |
| default: |
| goto error; |
| } |
| temp = xhci_readl(xhci, addr); /* unblock any posted writes */ |
| break; |
| case ClearPortFeature: |
| if (!wIndex || wIndex > ports) |
| goto error; |
| wIndex--; |
| addr = &xhci->op_regs->port_status_base + |
| NUM_PORT_REGS*(wIndex & 0xff); |
| temp = xhci_readl(xhci, addr); |
| temp = xhci_port_state_to_neutral(temp); |
| switch (wValue) { |
| case USB_PORT_FEAT_SUSPEND: |
| temp = xhci_readl(xhci, addr); |
| xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); |
| xhci_dbg(xhci, "PORTSC %04x\n", temp); |
| if (temp & PORT_RESET) |
| goto error; |
| if (temp & XDEV_U3) { |
| if ((temp & PORT_PE) == 0) |
| goto error; |
| 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, addr); |
| xhci_readl(xhci, addr); |
| } else { |
| temp = xhci_port_state_to_neutral(temp); |
| temp &= ~PORT_PLS_MASK; |
| temp |= PORT_LINK_STROBE | XDEV_RESUME; |
| xhci_writel(xhci, temp, addr); |
| |
| spin_unlock_irqrestore(&xhci->lock, |
| flags); |
| msleep(20); |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| temp = xhci_readl(xhci, addr); |
| temp = xhci_port_state_to_neutral(temp); |
| temp &= ~PORT_PLS_MASK; |
| temp |= PORT_LINK_STROBE | XDEV_U0; |
| xhci_writel(xhci, temp, addr); |
| } |
| xhci->port_c_suspend[wIndex >> 5] |= |
| 1 << (wIndex & 31); |
| } |
| |
| slot_id = xhci_find_slot_id_by_port(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: |
| xhci->port_c_suspend[wIndex >> 5] &= |
| ~(1 << (wIndex & 31)); |
| case USB_PORT_FEAT_C_RESET: |
| case USB_PORT_FEAT_C_CONNECTION: |
| case USB_PORT_FEAT_C_OVER_CURRENT: |
| case USB_PORT_FEAT_C_ENABLE: |
| xhci_clear_port_change_bit(xhci, wValue, wIndex, |
| addr, temp); |
| break; |
| case USB_PORT_FEAT_ENABLE: |
| xhci_disable_port(xhci, wIndex, addr, 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 ports; |
| u32 __iomem *addr; |
| |
| ports = HCS_MAX_PORTS(xhci->hcs_params1); |
| |
| /* Initial status is no changes */ |
| retval = (ports + 8) / 8; |
| memset(buf, 0, retval); |
| status = 0; |
| |
| mask = PORT_CSC | PORT_PEC | PORT_OCC; |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| /* For each port, did anything change? If so, set that bit in buf. */ |
| for (i = 0; i < ports; i++) { |
| addr = &xhci->op_regs->port_status_base + |
| NUM_PORT_REGS*i; |
| temp = xhci_readl(xhci, addr); |
| if ((temp & mask) != 0 || |
| (xhci->port_c_suspend[i >> 5] & 1 << (i & 31)) || |
| (xhci->resume_done[i] && time_after_eq( |
| jiffies, xhci->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 port; |
| unsigned long flags; |
| |
| xhci_dbg(xhci, "suspend root hub\n"); |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| if (hcd->self.root_hub->do_remote_wakeup) { |
| port = HCS_MAX_PORTS(xhci->hcs_params1); |
| while (port--) { |
| if (xhci->resume_done[port] != 0) { |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| xhci_dbg(xhci, "suspend failed because " |
| "port %d is resuming\n", |
| port + 1); |
| return -EBUSY; |
| } |
| } |
| } |
| |
| port = HCS_MAX_PORTS(xhci->hcs_params1); |
| xhci->bus_suspended = 0; |
| while (port--) { |
| /* suspend the port if the port is not suspended */ |
| u32 __iomem *addr; |
| u32 t1, t2; |
| int slot_id; |
| |
| addr = &xhci->op_regs->port_status_base + |
| NUM_PORT_REGS * (port & 0xff); |
| t1 = xhci_readl(xhci, addr); |
| t2 = xhci_port_state_to_neutral(t1); |
| |
| if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) { |
| xhci_dbg(xhci, "port %d not suspended\n", port); |
| slot_id = xhci_find_slot_id_by_port(xhci, port + 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, &xhci->bus_suspended); |
| } |
| 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, addr); |
| |
| if (DEV_HIGHSPEED(t1)) { |
| /* enable remote wake up for USB 2.0 */ |
| u32 __iomem *addr; |
| u32 tmp; |
| |
| addr = &xhci->op_regs->port_power_base + |
| NUM_PORT_REGS * (port & 0xff); |
| tmp = xhci_readl(xhci, addr); |
| tmp |= PORT_RWE; |
| xhci_writel(xhci, tmp, addr); |
| } |
| } |
| hcd->state = HC_STATE_SUSPENDED; |
| xhci->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 port; |
| u32 temp; |
| unsigned long flags; |
| |
| xhci_dbg(xhci, "resume root hub\n"); |
| |
| if (time_before(jiffies, xhci->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 = HCS_MAX_PORTS(xhci->hcs_params1); |
| while (port--) { |
| /* Check whether need resume ports. If needed |
| resume port and disable remote wakeup */ |
| u32 __iomem *addr; |
| u32 temp; |
| int slot_id; |
| |
| addr = &xhci->op_regs->port_status_base + |
| NUM_PORT_REGS * (port & 0xff); |
| temp = xhci_readl(xhci, addr); |
| 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, &xhci->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, addr); |
| } else { |
| temp = xhci_port_state_to_neutral(temp); |
| temp &= ~PORT_PLS_MASK; |
| temp |= PORT_LINK_STROBE | XDEV_RESUME; |
| xhci_writel(xhci, temp, addr); |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| msleep(20); |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| temp = xhci_readl(xhci, addr); |
| temp = xhci_port_state_to_neutral(temp); |
| temp &= ~PORT_PLS_MASK; |
| temp |= PORT_LINK_STROBE | XDEV_U0; |
| xhci_writel(xhci, temp, addr); |
| } |
| slot_id = xhci_find_slot_id_by_port(xhci, port + 1); |
| if (slot_id) |
| xhci_ring_device(xhci, slot_id); |
| } else |
| xhci_writel(xhci, temp, addr); |
| |
| if (DEV_HIGHSPEED(temp)) { |
| /* disable remote wake up for USB 2.0 */ |
| u32 __iomem *addr; |
| u32 tmp; |
| |
| addr = &xhci->op_regs->port_power_base + |
| NUM_PORT_REGS * (port & 0xff); |
| tmp = xhci_readl(xhci, addr); |
| tmp &= ~PORT_RWE; |
| xhci_writel(xhci, tmp, addr); |
| } |
| } |
| |
| (void) xhci_readl(xhci, &xhci->op_regs->command); |
| |
| xhci->next_statechange = jiffies + msecs_to_jiffies(5); |
| hcd->state = HC_STATE_RUNNING; |
| /* 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; |
| } |
| |
| #else |
| |
| #define xhci_bus_suspend NULL |
| #define xhci_bus_resume NULL |
| |
| #endif |