v4.19.13 snapshot.
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
new file mode 100644
index 0000000..01b5818
--- /dev/null
+++ b/drivers/usb/host/xhci-hub.c
@@ -0,0 +1,1736 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ */
+
+
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#include "xhci.h"
+#include "xhci-trace.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 3 BOS descriptor and a capability descriptors, combined.
+ * Fields will be adjusted and added later in xhci_create_usb3_bos_desc()
+ */
+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, SuperSpeed */
+ 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. */
+ /* Second device capability, SuperSpeedPlus */
+ 0x1c, /* bLength 28, will be adjusted later */
+ USB_DT_DEVICE_CAPABILITY, /* Device Capability */
+ USB_SSP_CAP_TYPE, /* bDevCapabilityType SUPERSPEED_PLUS */
+ 0x00, /* bReserved 0 */
+ 0x23, 0x00, 0x00, 0x00, /* bmAttributes, SSAC=3 SSIC=1 */
+ 0x01, 0x00, /* wFunctionalitySupport */
+ 0x00, 0x00, /* wReserved 0 */
+ /* Default Sublink Speed Attributes, overwrite if custom PSI exists */
+ 0x34, 0x00, 0x05, 0x00, /* 5Gbps, symmetric, rx, ID = 4 */
+ 0xb4, 0x00, 0x05, 0x00, /* 5Gbps, symmetric, tx, ID = 4 */
+ 0x35, 0x40, 0x0a, 0x00, /* 10Gbps, SSP, symmetric, rx, ID = 5 */
+ 0xb5, 0x40, 0x0a, 0x00, /* 10Gbps, SSP, symmetric, tx, ID = 5 */
+};
+
+static int xhci_create_usb3_bos_desc(struct xhci_hcd *xhci, char *buf,
+ u16 wLength)
+{
+ int i, ssa_count;
+ u32 temp;
+ u16 desc_size, ssp_cap_size, ssa_size = 0;
+ bool usb3_1 = false;
+
+ desc_size = USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
+ ssp_cap_size = sizeof(usb_bos_descriptor) - desc_size;
+
+ /* does xhci support USB 3.1 Enhanced SuperSpeed */
+ if (xhci->usb3_rhub.min_rev >= 0x01) {
+ /* does xhci provide a PSI table for SSA speed attributes? */
+ if (xhci->usb3_rhub.psi_count) {
+ /* two SSA entries for each unique PSI ID, RX and TX */
+ ssa_count = xhci->usb3_rhub.psi_uid_count * 2;
+ ssa_size = ssa_count * sizeof(u32);
+ ssp_cap_size -= 16; /* skip copying the default SSA */
+ }
+ desc_size += ssp_cap_size;
+ usb3_1 = true;
+ }
+ memcpy(buf, &usb_bos_descriptor, min(desc_size, wLength));
+
+ if (usb3_1) {
+ /* modify bos descriptor bNumDeviceCaps and wTotalLength */
+ buf[4] += 1;
+ put_unaligned_le16(desc_size + ssa_size, &buf[2]);
+ }
+
+ if (wLength < USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE)
+ return wLength;
+
+ /* Indicate whether the host has LTM support. */
+ temp = readl(&xhci->cap_regs->hcc_params);
+ if (HCC_LTC(temp))
+ buf[8] |= USB_LTM_SUPPORT;
+
+ /* Set the U1 and U2 exit latencies. */
+ if ((xhci->quirks & XHCI_LPM_SUPPORT)) {
+ temp = readl(&xhci->cap_regs->hcs_params3);
+ buf[12] = HCS_U1_LATENCY(temp);
+ put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);
+ }
+
+ /* If PSI table exists, add the custom speed attributes from it */
+ if (usb3_1 && xhci->usb3_rhub.psi_count) {
+ u32 ssp_cap_base, bm_attrib, psi, psi_mant, psi_exp;
+ int offset;
+
+ ssp_cap_base = USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
+
+ if (wLength < desc_size)
+ return wLength;
+ buf[ssp_cap_base] = ssp_cap_size + ssa_size;
+
+ /* attribute count SSAC bits 4:0 and ID count SSIC bits 8:5 */
+ bm_attrib = (ssa_count - 1) & 0x1f;
+ bm_attrib |= (xhci->usb3_rhub.psi_uid_count - 1) << 5;
+ put_unaligned_le32(bm_attrib, &buf[ssp_cap_base + 4]);
+
+ if (wLength < desc_size + ssa_size)
+ return wLength;
+ /*
+ * Create the Sublink Speed Attributes (SSA) array.
+ * The xhci PSI field and USB 3.1 SSA fields are very similar,
+ * but link type bits 7:6 differ for values 01b and 10b.
+ * xhci has also only one PSI entry for a symmetric link when
+ * USB 3.1 requires two SSA entries (RX and TX) for every link
+ */
+ offset = desc_size;
+ for (i = 0; i < xhci->usb3_rhub.psi_count; i++) {
+ psi = xhci->usb3_rhub.psi[i];
+ psi &= ~USB_SSP_SUBLINK_SPEED_RSVD;
+ psi_exp = XHCI_EXT_PORT_PSIE(psi);
+ psi_mant = XHCI_EXT_PORT_PSIM(psi);
+
+ /* Shift to Gbps and set SSP Link BIT(14) if 10Gpbs */
+ for (; psi_exp < 3; psi_exp++)
+ psi_mant /= 1000;
+ if (psi_mant >= 10)
+ psi |= BIT(14);
+
+ if ((psi & PLT_MASK) == PLT_SYM) {
+ /* Symmetric, create SSA RX and TX from one PSI entry */
+ put_unaligned_le32(psi, &buf[offset]);
+ psi |= 1 << 7; /* turn entry to TX */
+ offset += 4;
+ if (offset >= desc_size + ssa_size)
+ return desc_size + ssa_size;
+ } else if ((psi & PLT_MASK) == PLT_ASYM_RX) {
+ /* Asymetric RX, flip bits 7:6 for SSA */
+ psi ^= PLT_MASK;
+ }
+ put_unaligned_le32(psi, &buf[offset]);
+ offset += 4;
+ if (offset >= desc_size + ssa_size)
+ return desc_size + ssa_size;
+ }
+ }
+ /* ssa_size is 0 for other than usb 3.1 hosts */
+ return desc_size + ssa_size;
+}
+
+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;
+ struct xhci_hub *rhub;
+
+ rhub = &xhci->usb2_rhub;
+ ports = rhub->num_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 = readl(rhub->ports[i]->addr);
+ /* 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;
+ struct xhci_hub *rhub;
+
+ rhub = &xhci->usb3_rhub;
+ ports = rhub->num_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 = readl(rhub->ports[i]->addr);
+ if (portsc & PORT_DEV_REMOVE)
+ port_removable |= 1 << (i + 1);
+ }
+
+ desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable);
+}
+
+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] || !xhci->devs[i]->udev)
+ 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 ret;
+ int i;
+
+ ret = 0;
+ virt_dev = xhci->devs[slot_id];
+ if (!virt_dev)
+ return -ENODEV;
+
+ trace_xhci_stop_device(virt_dev);
+
+ cmd = xhci_alloc_command(xhci, true, GFP_NOIO);
+ if (!cmd)
+ 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) {
+ struct xhci_ep_ctx *ep_ctx;
+ struct xhci_command *command;
+
+ ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->out_ctx, i);
+
+ /* Check ep is running, required by AMD SNPS 3.1 xHC */
+ if (GET_EP_CTX_STATE(ep_ctx) != EP_STATE_RUNNING)
+ continue;
+
+ command = xhci_alloc_command(xhci, false, GFP_NOWAIT);
+ if (!command) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ ret = -ENOMEM;
+ goto cmd_cleanup;
+ }
+
+ ret = xhci_queue_stop_endpoint(xhci, command, slot_id,
+ i, suspend);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_free_command(xhci, command);
+ goto cmd_cleanup;
+ }
+ }
+ }
+ ret = xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ goto cmd_cleanup;
+ }
+
+ xhci_ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ /* Wait for last stop endpoint command to finish */
+ wait_for_completion(cmd->completion);
+
+ if (cmd->status == COMP_COMMAND_ABORTED ||
+ cmd->status == COMP_COMMAND_RING_STOPPED) {
+ xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n");
+ ret = -ETIME;
+ }
+
+cmd_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, s;
+ struct xhci_virt_ep *ep;
+
+ for (i = 0; i < LAST_EP_INDEX + 1; i++) {
+ ep = &xhci->devs[slot_id]->eps[i];
+
+ if (ep->ep_state & EP_HAS_STREAMS) {
+ for (s = 1; s < ep->stream_info->num_streams; s++)
+ xhci_ring_ep_doorbell(xhci, slot_id, i, s);
+ } else if (ep->ring && ep->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;
+ }
+
+ if (xhci->quirks & XHCI_BROKEN_PORT_PED) {
+ xhci_dbg(xhci,
+ "Broken Port Enabled/Disabled, ignoring port disable request.\n");
+ return;
+ }
+
+ /* Write 1 to disable the port */
+ writel(port_status | PORT_PE, addr);
+ port_status = readl(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;
+ case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
+ status = PORT_CEC;
+ port_change_bit = "config error";
+ break;
+ default:
+ /* Should never happen */
+ return;
+ }
+ /* Change bits are all write 1 to clear */
+ writel(port_status | status, addr);
+ port_status = readl(addr);
+ xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n",
+ port_change_bit, wIndex, port_status);
+}
+
+struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ if (hcd->speed >= HCD_USB3)
+ return &xhci->usb3_rhub;
+ return &xhci->usb2_rhub;
+}
+
+/*
+ * 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)
+{
+ struct xhci_hub *rhub;
+ struct xhci_port *port;
+ u32 temp;
+
+ rhub = xhci_get_rhub(hcd);
+ port = rhub->ports[index];
+ temp = readl(port->addr);
+ temp = xhci_port_state_to_neutral(temp);
+ if (on) {
+ /* Power on */
+ writel(temp | PORT_POWER, port->addr);
+ temp = readl(port->addr);
+ xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n",
+ index, temp);
+ } else {
+ /* Power off */
+ writel(temp & ~PORT_POWER, port->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;
+ struct xhci_port *port;
+
+ /* xhci only supports test mode for usb2 ports */
+ port = xhci->usb2_rhub.ports[wIndex];
+ temp = readl(port->addr + PORTPMSC);
+ temp |= test_mode << PORT_TEST_MODE_SHIFT;
+ writel(temp, port->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");
+ spin_unlock_irqrestore(&xhci->lock, *flags);
+ for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
+ if (!xhci->devs[i])
+ continue;
+
+ retval = xhci_disable_slot(xhci, i);
+ if (retval)
+ xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
+ i, retval);
+ }
+ spin_lock_irqsave(&xhci->lock, *flags);
+ /* 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->usb3_rhub.num_ports; i++)
+ xhci_set_port_power(xhci, xhci->shared_hcd, i, false, flags);
+ /* Power off USB2 ports*/
+ for (i = 0; i < xhci->usb2_rhub.num_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, struct xhci_port *port,
+ u32 link_state)
+{
+ u32 temp;
+
+ temp = readl(port->addr);
+ temp = xhci_port_state_to_neutral(temp);
+ temp &= ~PORT_PLS_MASK;
+ temp |= PORT_LINK_STROBE | link_state;
+ writel(temp, port->addr);
+}
+
+static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
+ struct xhci_port *port, u16 wake_mask)
+{
+ u32 temp;
+
+ temp = readl(port->addr);
+ 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;
+
+ writel(temp, port->addr);
+}
+
+/* Test and clear port RWC bit */
+void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
+ u32 port_bit)
+{
+ u32 temp;
+
+ temp = readl(port->addr);
+ if (temp & port_bit) {
+ temp = xhci_port_state_to_neutral(temp);
+ temp |= port_bit;
+ writel(temp, port->addr);
+ }
+}
+
+/* Updates Link Status for USB 2.1 port */
+static void xhci_hub_report_usb2_link_state(u32 *status, u32 status_reg)
+{
+ if ((status_reg & PORT_PLS_MASK) == XDEV_U2)
+ *status |= USB_PORT_STAT_L1;
+}
+
+/* Updates Link Status for super Speed port */
+static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
+ u32 *status, u32 status_reg)
+{
+ u32 pls = status_reg & PORT_PLS_MASK;
+
+ /* resume state is a xHCI internal state.
+ * Do not report it to usb core, instead, pretend to be U3,
+ * thus usb core knows it's not ready for transfer
+ */
+ if (pls == XDEV_RESUME) {
+ *status |= USB_SS_PORT_LS_U3;
+ return;
+ }
+
+ /* When the CAS bit is set then warm reset
+ * should be performed on port
+ */
+ if (status_reg & PORT_CAS) {
+ /* The CAS bit can be set while the port is
+ * in any link state.
+ * Only roothubs have CAS bit, so we
+ * pretend to be in compliance mode
+ * unless we're already in compliance
+ * or the inactive state.
+ */
+ if (pls != USB_SS_PORT_LS_COMP_MOD &&
+ pls != USB_SS_PORT_LS_SS_INACTIVE) {
+ pls = USB_SS_PORT_LS_COMP_MOD;
+ }
+ /* Return also connection bit -
+ * hub state machine resets port
+ * when this bit is set.
+ */
+ pls |= USB_PORT_STAT_CONNECTION;
+ } else {
+ /*
+ * If CAS bit isn't set but the Port is already at
+ * Compliance Mode, fake a connection so the USB core
+ * notices the Compliance state and resets the port.
+ * This resolves an issue generated by the SN65LVPE502CP
+ * in which sometimes the port enters compliance mode
+ * caused by a delay on the host-device negotiation.
+ */
+ if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
+ (pls == USB_SS_PORT_LS_COMP_MOD))
+ pls |= USB_PORT_STAT_CONNECTION;
+ }
+
+ /* update status field */
+ *status |= pls;
+}
+
+/*
+ * Function for Compliance Mode Quirk.
+ *
+ * This Function verifies if all xhc USB3 ports have entered U0, if so,
+ * the compliance mode timer is deleted. A port won't enter
+ * compliance mode if it has previously entered U0.
+ */
+static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status,
+ u16 wIndex)
+{
+ u32 all_ports_seen_u0 = ((1 << xhci->usb3_rhub.num_ports) - 1);
+ bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0);
+
+ if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK))
+ return;
+
+ if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) {
+ xhci->port_status_u0 |= 1 << wIndex;
+ if (xhci->port_status_u0 == all_ports_seen_u0) {
+ del_timer_sync(&xhci->comp_mode_recovery_timer);
+ xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
+ "All USB3 ports have entered U0 already!");
+ xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
+ "Compliance Mode Recovery Timer Deleted.");
+ }
+ }
+}
+
+static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
+{
+ u32 ext_stat = 0;
+ int speed_id;
+
+ /* only support rx and tx lane counts of 1 in usb3.1 spec */
+ speed_id = DEV_PORT_SPEED(raw_port_status);
+ ext_stat |= speed_id; /* bits 3:0, RX speed id */
+ ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */
+
+ ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */
+ ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */
+
+ return ext_stat;
+}
+
+/*
+ * Converts a raw xHCI port status into the format that external USB 2.0 or USB
+ * 3.0 hubs use.
+ *
+ * Possible side effects:
+ * - Mark a port as being done with device resume,
+ * and ring the endpoint doorbells.
+ * - Stop the Synopsys redriver Compliance Mode polling.
+ * - Drop and reacquire the xHCI lock, in order to wait for port resume.
+ */
+static u32 xhci_get_port_status(struct usb_hcd *hcd,
+ struct xhci_bus_state *bus_state,
+ u16 wIndex, u32 raw_port_status,
+ unsigned long flags)
+ __releases(&xhci->lock)
+ __acquires(&xhci->lock)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ u32 status = 0;
+ int slot_id;
+ struct xhci_hub *rhub;
+ struct xhci_port *port;
+
+ rhub = xhci_get_rhub(hcd);
+ port = rhub->ports[wIndex];
+
+ /* wPortChange bits */
+ if (raw_port_status & PORT_CSC)
+ status |= USB_PORT_STAT_C_CONNECTION << 16;
+ if (raw_port_status & PORT_PEC)
+ status |= USB_PORT_STAT_C_ENABLE << 16;
+ if ((raw_port_status & PORT_OCC))
+ status |= USB_PORT_STAT_C_OVERCURRENT << 16;
+ if ((raw_port_status & PORT_RC))
+ status |= USB_PORT_STAT_C_RESET << 16;
+ /* USB3.0 only */
+ if (hcd->speed >= HCD_USB3) {
+ /* Port link change with port in resume state should not be
+ * reported to usbcore, as this is an internal state to be
+ * handled by xhci driver. Reporting PLC to usbcore may
+ * cause usbcore clearing PLC first and port change event
+ * irq won't be generated.
+ */
+ if ((raw_port_status & PORT_PLC) &&
+ (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME)
+ status |= USB_PORT_STAT_C_LINK_STATE << 16;
+ if ((raw_port_status & PORT_WRC))
+ status |= USB_PORT_STAT_C_BH_RESET << 16;
+ if ((raw_port_status & PORT_CEC))
+ status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
+ }
+
+ if (hcd->speed < HCD_USB3) {
+ if ((raw_port_status & PORT_PLS_MASK) == XDEV_U3
+ && (raw_port_status & PORT_POWER))
+ status |= USB_PORT_STAT_SUSPEND;
+ }
+ if ((raw_port_status & PORT_PLS_MASK) == XDEV_RESUME &&
+ !DEV_SUPERSPEED_ANY(raw_port_status) && hcd->speed < HCD_USB3) {
+ if ((raw_port_status & PORT_RESET) ||
+ !(raw_port_status & PORT_PE))
+ return 0xffffffff;
+ /* did port event handler already start resume timing? */
+ if (!bus_state->resume_done[wIndex]) {
+ /* If not, maybe we are in a host initated resume? */
+ if (test_bit(wIndex, &bus_state->resuming_ports)) {
+ /* Host initated resume doesn't time the resume
+ * signalling using resume_done[].
+ * It manually sets RESUME state, sleeps 20ms
+ * and sets U0 state. This should probably be
+ * changed, but not right now.
+ */
+ } else {
+ /* port resume was discovered now and here,
+ * start resume timing
+ */
+ unsigned long timeout = jiffies +
+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
+
+ set_bit(wIndex, &bus_state->resuming_ports);
+ bus_state->resume_done[wIndex] = timeout;
+ mod_timer(&hcd->rh_timer, timeout);
+ usb_hcd_start_port_resume(&hcd->self, wIndex);
+ }
+ /* Has resume been signalled for USB_RESUME_TIME yet? */
+ } else if (time_after_eq(jiffies,
+ bus_state->resume_done[wIndex])) {
+ int time_left;
+
+ xhci_dbg(xhci, "Resume USB2 port %d\n",
+ wIndex + 1);
+ bus_state->resume_done[wIndex] = 0;
+ clear_bit(wIndex, &bus_state->resuming_ports);
+
+ set_bit(wIndex, &bus_state->rexit_ports);
+
+ xhci_test_and_clear_bit(xhci, port, PORT_PLC);
+ xhci_set_link_state(xhci, port, XDEV_U0);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ time_left = wait_for_completion_timeout(
+ &bus_state->rexit_done[wIndex],
+ msecs_to_jiffies(
+ XHCI_MAX_REXIT_TIMEOUT_MS));
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ if (time_left) {
+ slot_id = xhci_find_slot_id_by_port(hcd,
+ xhci, wIndex + 1);
+ if (!slot_id) {
+ xhci_dbg(xhci, "slot_id is zero\n");
+ return 0xffffffff;
+ }
+ xhci_ring_device(xhci, slot_id);
+ } else {
+ int port_status = readl(port->addr);
+ xhci_warn(xhci, "Port resume took longer than %i msec, port status = 0x%x\n",
+ XHCI_MAX_REXIT_TIMEOUT_MS,
+ port_status);
+ status |= USB_PORT_STAT_SUSPEND;
+ clear_bit(wIndex, &bus_state->rexit_ports);
+ }
+
+ usb_hcd_end_port_resume(&hcd->self, wIndex);
+ bus_state->port_c_suspend |= 1 << wIndex;
+ bus_state->suspended_ports &= ~(1 << wIndex);
+ } else {
+ /*
+ * The resume has been signaling for less than
+ * USB_RESUME_TIME. Report the port status as SUSPEND,
+ * let the usbcore check port status again and clear
+ * resume signaling later.
+ */
+ status |= USB_PORT_STAT_SUSPEND;
+ }
+ }
+ /*
+ * Clear stale usb2 resume signalling variables in case port changed
+ * state during resume signalling. For example on error
+ */
+ if ((bus_state->resume_done[wIndex] ||
+ test_bit(wIndex, &bus_state->resuming_ports)) &&
+ (raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
+ (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
+ bus_state->resume_done[wIndex] = 0;
+ clear_bit(wIndex, &bus_state->resuming_ports);
+ usb_hcd_end_port_resume(&hcd->self, wIndex);
+ }
+
+
+ if ((raw_port_status & PORT_PLS_MASK) == XDEV_U0 &&
+ (raw_port_status & PORT_POWER)) {
+ if (bus_state->suspended_ports & (1 << wIndex)) {
+ bus_state->suspended_ports &= ~(1 << wIndex);
+ if (hcd->speed < HCD_USB3)
+ bus_state->port_c_suspend |= 1 << wIndex;
+ }
+ bus_state->resume_done[wIndex] = 0;
+ clear_bit(wIndex, &bus_state->resuming_ports);
+ }
+ if (raw_port_status & PORT_CONNECT) {
+ status |= USB_PORT_STAT_CONNECTION;
+ status |= xhci_port_speed(raw_port_status);
+ }
+ if (raw_port_status & PORT_PE)
+ status |= USB_PORT_STAT_ENABLE;
+ if (raw_port_status & PORT_OC)
+ status |= USB_PORT_STAT_OVERCURRENT;
+ if (raw_port_status & PORT_RESET)
+ status |= USB_PORT_STAT_RESET;
+ if (raw_port_status & PORT_POWER) {
+ if (hcd->speed >= HCD_USB3)
+ status |= USB_SS_PORT_STAT_POWER;
+ else
+ status |= USB_PORT_STAT_POWER;
+ }
+ /* Update Port Link State */
+ if (hcd->speed >= HCD_USB3) {
+ xhci_hub_report_usb3_link_state(xhci, &status, raw_port_status);
+ /*
+ * Verify if all USB3 Ports Have entered U0 already.
+ * Delete Compliance Mode Timer if so.
+ */
+ xhci_del_comp_mod_timer(xhci, raw_port_status, wIndex);
+ } else {
+ xhci_hub_report_usb2_link_state(&status, raw_port_status);
+ }
+ if (bus_state->port_c_suspend & (1 << wIndex))
+ status |= USB_PORT_STAT_C_SUSPEND << 16;
+
+ return 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 max_ports;
+ unsigned long flags;
+ u32 temp, status;
+ int retval = 0;
+ int slot_id;
+ struct xhci_bus_state *bus_state;
+ u16 link_state = 0;
+ u16 wake_mask = 0;
+ u16 timeout = 0;
+ u16 test_mode = 0;
+ struct xhci_hub *rhub;
+ struct xhci_port **ports;
+
+ rhub = xhci_get_rhub(hcd);
+ ports = rhub->ports;
+ max_ports = rhub->num_ports;
+ 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;
+
+ retval = xhci_create_usb3_bos_desc(xhci, buf, wLength);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return retval;
+ case GetPortStatus:
+ if (!wIndex || wIndex > max_ports)
+ goto error;
+ wIndex--;
+ temp = readl(ports[wIndex]->addr);
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
+ retval = -ENODEV;
+ break;
+ }
+ trace_xhci_get_port_status(wIndex, temp);
+ status = xhci_get_port_status(hcd, bus_state, wIndex, temp,
+ flags);
+ if (status == 0xffffffff)
+ goto error;
+
+ xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n",
+ wIndex, temp);
+ xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
+
+ put_unaligned(cpu_to_le32(status), (__le32 *) buf);
+ /* if USB 3.1 extended port status return additional 4 bytes */
+ if (wValue == 0x02) {
+ u32 port_li;
+
+ if (hcd->speed < HCD_USB31 || wLength != 8) {
+ xhci_err(xhci, "get ext port status invalid parameter\n");
+ retval = -EINVAL;
+ break;
+ }
+ port_li = readl(ports[wIndex]->addr + PORTLI);
+ status = xhci_get_ext_port_status(temp, port_li);
+ put_unaligned_le32(cpu_to_le32(status), &buf[4]);
+ }
+ break;
+ case SetPortFeature:
+ if (wValue == USB_PORT_FEAT_LINK_STATE)
+ 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;
+ if (!wIndex || wIndex > max_ports)
+ goto error;
+ wIndex--;
+ temp = readl(ports[wIndex]->addr);
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
+ 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 = readl(ports[wIndex]->addr);
+ if ((temp & PORT_PLS_MASK) != XDEV_U0) {
+ /* Resume the port to U0 first */
+ xhci_set_link_state(xhci, ports[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 = readl(ports[wIndex]->addr);
+ 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, ports[wIndex], XDEV_U3);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(10); /* wait device to enter */
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ temp = readl(ports[wIndex]->addr);
+ bus_state->suspended_ports |= 1 << wIndex;
+ break;
+ case USB_PORT_FEAT_LINK_STATE:
+ temp = readl(ports[wIndex]->addr);
+ /* Disable port */
+ if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
+ xhci_dbg(xhci, "Disable port %d\n", wIndex);
+ temp = xhci_port_state_to_neutral(temp);
+ /*
+ * Clear all change bits, so that we get a new
+ * connection event.
+ */
+ temp |= PORT_CSC | PORT_PEC | PORT_WRC |
+ PORT_OCC | PORT_RC | PORT_PLC |
+ PORT_CEC;
+ writel(temp | PORT_PE, ports[wIndex]->addr);
+ temp = readl(ports[wIndex]->addr);
+ break;
+ }
+
+ /* Put link in RxDetect (enable port) */
+ if (link_state == USB_SS_PORT_LS_RX_DETECT) {
+ xhci_dbg(xhci, "Enable port %d\n", wIndex);
+ xhci_set_link_state(xhci, ports[wIndex],
+ link_state);
+ temp = readl(ports[wIndex]->addr);
+ break;
+ }
+
+ /*
+ * For xHCI 1.1 according to section 4.19.1.2.4.1 a
+ * root hub port's transition to compliance mode upon
+ * detecting LFPS timeout may be controlled by an
+ * Compliance Transition Enabled (CTE) flag (not
+ * software visible). This flag is set by writing 0xA
+ * to PORTSC PLS field which will allow transition to
+ * compliance mode the next time LFPS timeout is
+ * encountered. A warm reset will clear it.
+ *
+ * The CTE flag is only supported if the HCCPARAMS2 CTC
+ * flag is set, otherwise, the compliance substate is
+ * automatically entered as on 1.0 and prior.
+ */
+ if (link_state == USB_SS_PORT_LS_COMP_MOD) {
+ if (!HCC2_CTC(xhci->hcc_params2)) {
+ xhci_dbg(xhci, "CTC flag is 0, port already supports entering compliance mode\n");
+ break;
+ }
+
+ if ((temp & PORT_CONNECT)) {
+ xhci_warn(xhci, "Can't set compliance mode when port is connected\n");
+ goto error;
+ }
+
+ xhci_dbg(xhci, "Enable compliance mode transition for port %d\n",
+ wIndex);
+ xhci_set_link_state(xhci, ports[wIndex],
+ link_state);
+
+ temp = readl(ports[wIndex]->addr);
+ break;
+ }
+ /* Port must be enabled */
+ if (!(temp & PORT_PE)) {
+ retval = -ENODEV;
+ break;
+ }
+ /* Can't set port link state above '3' (U3) */
+ if (link_state > USB_SS_PORT_LS_U3) {
+ xhci_warn(xhci, "Cannot set port %d link state %d\n",
+ wIndex, link_state);
+ 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, ports[wIndex], link_state);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(20); /* wait device to enter */
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ temp = readl(ports[wIndex]->addr);
+ 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, hub_wq will ignore the roothub events until
+ * the roothub is registered.
+ */
+ xhci_set_port_power(xhci, hcd, wIndex, true, &flags);
+ break;
+ case USB_PORT_FEAT_RESET:
+ temp = (temp | PORT_RESET);
+ writel(temp, ports[wIndex]->addr);
+
+ temp = readl(ports[wIndex]->addr);
+ 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, ports[wIndex],
+ wake_mask);
+ temp = readl(ports[wIndex]->addr);
+ 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;
+ writel(temp, ports[wIndex]->addr);
+ temp = readl(ports[wIndex]->addr);
+ break;
+ case USB_PORT_FEAT_U1_TIMEOUT:
+ if (hcd->speed < HCD_USB3)
+ goto error;
+ temp = readl(ports[wIndex]->addr + PORTPMSC);
+ temp &= ~PORT_U1_TIMEOUT_MASK;
+ temp |= PORT_U1_TIMEOUT(timeout);
+ writel(temp, ports[wIndex]->addr + PORTPMSC);
+ break;
+ case USB_PORT_FEAT_U2_TIMEOUT:
+ if (hcd->speed < HCD_USB3)
+ goto error;
+ temp = readl(ports[wIndex]->addr + PORTPMSC);
+ temp &= ~PORT_U2_TIMEOUT_MASK;
+ temp |= PORT_U2_TIMEOUT(timeout);
+ writel(temp, ports[wIndex]->addr + 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;
+ }
+ /* unblock any posted writes */
+ temp = readl(ports[wIndex]->addr);
+ break;
+ case ClearPortFeature:
+ if (!wIndex || wIndex > max_ports)
+ goto error;
+ wIndex--;
+ temp = readl(ports[wIndex]->addr);
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
+ 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 = readl(ports[wIndex]->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 & PORT_PLS_MASK) == XDEV_U3) {
+ if ((temp & PORT_PE) == 0)
+ goto error;
+
+ set_bit(wIndex, &bus_state->resuming_ports);
+ usb_hcd_start_port_resume(&hcd->self, wIndex);
+ xhci_set_link_state(xhci, ports[wIndex],
+ XDEV_RESUME);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(USB_RESUME_TIMEOUT);
+ spin_lock_irqsave(&xhci->lock, flags);
+ xhci_set_link_state(xhci, ports[wIndex],
+ XDEV_U0);
+ clear_bit(wIndex, &bus_state->resuming_ports);
+ usb_hcd_end_port_resume(&hcd->self, wIndex);
+ }
+ 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);
+ /* fall through */
+ 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:
+ case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
+ xhci_clear_port_change_bit(xhci, wValue, wIndex,
+ ports[wIndex]->addr, temp);
+ break;
+ case USB_PORT_FEAT_ENABLE:
+ xhci_disable_port(hcd, xhci, wIndex,
+ ports[wIndex]->addr, temp);
+ break;
+ case USB_PORT_FEAT_POWER:
+ 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;
+ }
+ 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;
+ struct xhci_bus_state *bus_state;
+ bool reset_change = false;
+ struct xhci_hub *rhub;
+ struct xhci_port **ports;
+
+ rhub = xhci_get_rhub(hcd);
+ ports = rhub->ports;
+ max_ports = rhub->num_ports;
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
+
+ /* Initial status is no changes */
+ retval = (max_ports + 8) / 8;
+ memset(buf, 0, retval);
+
+ /*
+ * Inform the usbcore about resume-in-progress by returning
+ * a non-zero value even if there are no status changes.
+ */
+ status = bus_state->resuming_ports;
+
+ mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC | PORT_CEC;
+
+ 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 = readl(ports[i]->addr);
+ if (temp == ~(u32)0) {
+ xhci_hc_died(xhci);
+ retval = -ENODEV;
+ break;
+ }
+ trace_xhci_hub_status_data(i, temp);
+
+ 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;
+ }
+ if ((temp & PORT_RC))
+ reset_change = true;
+ }
+ if (!status && !reset_change) {
+ xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
+ clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+ }
+ 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;
+ struct xhci_bus_state *bus_state;
+ unsigned long flags;
+ struct xhci_hub *rhub;
+ struct xhci_port **ports;
+ u32 portsc_buf[USB_MAXCHILDREN];
+ bool wake_enabled;
+
+ rhub = xhci_get_rhub(hcd);
+ ports = rhub->ports;
+ max_ports = rhub->num_ports;
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
+ wake_enabled = hcd->self.root_hub->do_remote_wakeup;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ if (wake_enabled) {
+ if (bus_state->resuming_ports || /* USB2 */
+ bus_state->port_remote_wakeup) { /* USB3 */
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "suspend failed because a port is resuming\n");
+ return -EBUSY;
+ }
+ }
+ /*
+ * Prepare ports for suspend, but don't write anything before all ports
+ * are checked and we know bus suspend can proceed
+ */
+ bus_state->bus_suspended = 0;
+ port_index = max_ports;
+ while (port_index--) {
+ u32 t1, t2;
+
+ t1 = readl(ports[port_index]->addr);
+ t2 = xhci_port_state_to_neutral(t1);
+ portsc_buf[port_index] = 0;
+
+ /* Bail out if a USB3 port has a new device in link training */
+ if ((hcd->speed >= HCD_USB3) &&
+ (t1 & PORT_PLS_MASK) == XDEV_POLLING) {
+ bus_state->bus_suspended = 0;
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "Bus suspend bailout, port in polling\n");
+ return -EBUSY;
+ }
+
+ /* suspend ports in U0, or bail out for new connect changes */
+ if ((t1 & PORT_PE) && (t1 & PORT_PLS_MASK) == XDEV_U0) {
+ if ((t1 & PORT_CSC) && wake_enabled) {
+ bus_state->bus_suspended = 0;
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "Bus suspend bailout, port connect change\n");
+ return -EBUSY;
+ }
+ xhci_dbg(xhci, "port %d not suspended\n", port_index);
+ 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_PM
+ * is enabled, so also enable remote wake here.
+ */
+ if (wake_enabled) {
+ 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;
+ }
+
+ if ((xhci->quirks & XHCI_U2_DISABLE_WAKE) &&
+ (hcd->speed < HCD_USB3)) {
+ if (usb_amd_pt_check_port(hcd->self.controller,
+ port_index))
+ t2 &= ~PORT_WAKE_BITS;
+ }
+ } else
+ t2 &= ~PORT_WAKE_BITS;
+
+ t1 = xhci_port_state_to_neutral(t1);
+ if (t1 != t2)
+ portsc_buf[port_index] = t2;
+ }
+
+ /* write port settings, stopping and suspending ports if needed */
+ port_index = max_ports;
+ while (port_index--) {
+ if (!portsc_buf[port_index])
+ continue;
+ if (test_bit(port_index, &bus_state->bus_suspended)) {
+ int slot_id;
+
+ 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);
+ }
+ }
+ writel(portsc_buf[port_index], ports[port_index]->addr);
+ }
+ hcd->state = HC_STATE_SUSPENDED;
+ bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+}
+
+/*
+ * Workaround for missing Cold Attach Status (CAS) if device re-plugged in S3.
+ * warm reset a USB3 device stuck in polling or compliance mode after resume.
+ * See Intel 100/c230 series PCH specification update Doc #332692-006 Errata #8
+ */
+static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
+{
+ u32 portsc;
+
+ portsc = readl(port->addr);
+
+ /* if any of these are set we are not stuck */
+ if (portsc & (PORT_CONNECT | PORT_CAS))
+ return false;
+
+ if (((portsc & PORT_PLS_MASK) != XDEV_POLLING) &&
+ ((portsc & PORT_PLS_MASK) != XDEV_COMP_MODE))
+ return false;
+
+ /* clear wakeup/change bits, and do a warm port reset */
+ portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
+ portsc |= PORT_WR;
+ writel(portsc, port->addr);
+ /* flush write */
+ readl(port->addr);
+ return true;
+}
+
+int xhci_bus_resume(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct xhci_bus_state *bus_state;
+ unsigned long flags;
+ int max_ports, port_index;
+ int slot_id;
+ int sret;
+ u32 next_state;
+ u32 temp, portsc;
+ struct xhci_hub *rhub;
+ struct xhci_port **ports;
+
+ rhub = xhci_get_rhub(hcd);
+ ports = rhub->ports;
+ max_ports = rhub->num_ports;
+ 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 = readl(&xhci->op_regs->command);
+ temp &= ~CMD_EIE;
+ writel(temp, &xhci->op_regs->command);
+
+ /* bus specific resume for ports we suspended at bus_suspend */
+ if (hcd->speed >= HCD_USB3)
+ next_state = XDEV_U0;
+ else
+ next_state = XDEV_RESUME;
+
+ port_index = max_ports;
+ while (port_index--) {
+ portsc = readl(ports[port_index]->addr);
+
+ /* warm reset CAS limited ports stuck in polling/compliance */
+ if ((xhci->quirks & XHCI_MISSING_CAS) &&
+ (hcd->speed >= HCD_USB3) &&
+ xhci_port_missing_cas_quirk(ports[port_index])) {
+ xhci_dbg(xhci, "reset stuck port %d\n", port_index);
+ clear_bit(port_index, &bus_state->bus_suspended);
+ continue;
+ }
+ /* resume if we suspended the link, and it is still suspended */
+ if (test_bit(port_index, &bus_state->bus_suspended))
+ switch (portsc & PORT_PLS_MASK) {
+ case XDEV_U3:
+ portsc = xhci_port_state_to_neutral(portsc);
+ portsc &= ~PORT_PLS_MASK;
+ portsc |= PORT_LINK_STROBE | next_state;
+ break;
+ case XDEV_RESUME:
+ /* resume already initiated */
+ break;
+ default:
+ /* not in a resumeable state, ignore it */
+ clear_bit(port_index,
+ &bus_state->bus_suspended);
+ break;
+ }
+ /* disable wake for all ports, write new link state if needed */
+ portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
+ writel(portsc, ports[port_index]->addr);
+ }
+
+ /* USB2 specific resume signaling delay and U0 link state transition */
+ if (hcd->speed < HCD_USB3) {
+ if (bus_state->bus_suspended) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(USB_RESUME_TIMEOUT);
+ spin_lock_irqsave(&xhci->lock, flags);
+ }
+ for_each_set_bit(port_index, &bus_state->bus_suspended,
+ BITS_PER_LONG) {
+ /* Clear PLC to poll it later for U0 transition */
+ xhci_test_and_clear_bit(xhci, ports[port_index],
+ PORT_PLC);
+ xhci_set_link_state(xhci, ports[port_index], XDEV_U0);
+ }
+ }
+
+ /* poll for U0 link state complete, both USB2 and USB3 */
+ for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) {
+ sret = xhci_handshake(ports[port_index]->addr, PORT_PLC,
+ PORT_PLC, 10 * 1000);
+ if (sret) {
+ xhci_warn(xhci, "port %d resume PLC timeout\n",
+ port_index);
+ continue;
+ }
+ xhci_test_and_clear_bit(xhci, ports[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);
+ }
+ (void) readl(&xhci->op_regs->command);
+
+ bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
+ /* re-enable irqs */
+ temp = readl(&xhci->op_regs->command);
+ temp |= CMD_EIE;
+ writel(temp, &xhci->op_regs->command);
+ temp = readl(&xhci->op_regs->command);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+}
+
+unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct xhci_bus_state *bus_state;
+
+ bus_state = &xhci->bus_state[hcd_index(hcd)];
+
+ /* USB3 port wakeups are reported via usb_wakeup_notification() */
+ return bus_state->resuming_ports; /* USB2 ports only */
+}
+
+#endif /* CONFIG_PM */