#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
#define HCD_USB11 0x0010 /* USB 1.1 */
#define HCD_USB2 0x0020 /* USB 2.0 */
+#define HCD_USB3 0x0040 /* USB 3.0 */
/* called to init HCD and root hub */
int (*reset) (struct usb_hcd *hcd);
#include <linux/delay.h>
#include <linux/acpi.h>
#include "pci-quirks.h"
+#include "xhci-ext-caps.h"
#define UHCI_USBLEGSUP 0xc0 /* legacy support */
return;
}
+/*
+ * handshake - spin reading a register until handshake completes
+ * @ptr: address of hc register to be read
+ * @mask: bits to look at in result of read
+ * @done: value of those bits when handshake succeeds
+ * @wait_usec: timeout in microseconds
+ * @delay_usec: delay in microseconds to wait between polling
+ *
+ * Polls a register every delay_usec microseconds.
+ * Returns 0 when the mask bits have the value done.
+ * Returns -ETIMEDOUT if this condition is not true after
+ * wait_usec microseconds have passed.
+ */
+static int handshake(void __iomem *ptr, u32 mask, u32 done,
+ int wait_usec, int delay_usec)
+{
+ u32 result;
+
+ do {
+ result = readl(ptr);
+ result &= mask;
+ if (result == done)
+ return 0;
+ udelay(delay_usec);
+ wait_usec -= delay_usec;
+ } while (wait_usec > 0);
+ return -ETIMEDOUT;
+}
+
+/**
+ * PCI Quirks for xHCI.
+ *
+ * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
+ * It signals to the BIOS that the OS wants control of the host controller,
+ * and then waits 5 seconds for the BIOS to hand over control.
+ * If we timeout, assume the BIOS is broken and take control anyway.
+ */
+static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
+{
+ void __iomem *base;
+ int ext_cap_offset;
+ void __iomem *op_reg_base;
+ u32 val;
+ int timeout;
+
+ if (!mmio_resource_enabled(pdev, 0))
+ return;
+
+ base = ioremap_nocache(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0));
+ if (base == NULL)
+ return;
+ /*
+ * Find the Legacy Support Capability register -
+ * this is optional for xHCI host controllers.
+ */
+ ext_cap_offset = xhci_find_next_cap_offset(base, XHCI_HCC_PARAMS_OFFSET);
+ do {
+ if (!ext_cap_offset)
+ /* We've reached the end of the extended capabilities */
+ goto hc_init;
+ val = readl(base + ext_cap_offset);
+ if (XHCI_EXT_CAPS_ID(val) == XHCI_EXT_CAPS_LEGACY)
+ break;
+ ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset);
+ } while (1);
+
+ /* If the BIOS owns the HC, signal that the OS wants it, and wait */
+ if (val & XHCI_HC_BIOS_OWNED) {
+ writel(val & XHCI_HC_OS_OWNED, base + ext_cap_offset);
+
+ /* Wait for 5 seconds with 10 microsecond polling interval */
+ timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
+ 0, 5000, 10);
+
+ /* Assume a buggy BIOS and take HC ownership anyway */
+ if (timeout) {
+ dev_warn(&pdev->dev, "xHCI BIOS handoff failed"
+ " (BIOS bug ?) %08x\n", val);
+ writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset);
+ }
+ }
+
+ /* Disable any BIOS SMIs */
+ writel(XHCI_LEGACY_DISABLE_SMI,
+ base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
+
+hc_init:
+ op_reg_base = base + XHCI_HC_LENGTH(readl(base));
+
+ /* Wait for the host controller to be ready before writing any
+ * operational or runtime registers. Wait 5 seconds and no more.
+ */
+ timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
+ 5000, 10);
+ /* Assume a buggy HC and start HC initialization anyway */
+ if (timeout) {
+ val = readl(op_reg_base + XHCI_STS_OFFSET);
+ dev_warn(&pdev->dev,
+ "xHCI HW not ready after 5 sec (HC bug?) "
+ "status = 0x%x\n", val);
+ }
+
+ /* Send the halt and disable interrupts command */
+ val = readl(op_reg_base + XHCI_CMD_OFFSET);
+ val &= ~(XHCI_CMD_RUN | XHCI_IRQS);
+ writel(val, op_reg_base + XHCI_CMD_OFFSET);
+
+ /* Wait for the HC to halt - poll every 125 usec (one microframe). */
+ timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
+ XHCI_MAX_HALT_USEC, 125);
+ if (timeout) {
+ val = readl(op_reg_base + XHCI_STS_OFFSET);
+ dev_warn(&pdev->dev,
+ "xHCI HW did not halt within %d usec "
+ "status = 0x%x\n", XHCI_MAX_HALT_USEC, val);
+ }
+
+ iounmap(base);
+}
static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
{
quirk_usb_handoff_ohci(pdev);
else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
quirk_usb_disable_ehci(pdev);
+ else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
+ quirk_usb_handoff_xhci(pdev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff);
--- /dev/null
+/*
+ * 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/irq.h>
+#include <linux/module.h>
+
+#include "xhci.h"
+
+#define DRIVER_AUTHOR "Sarah Sharp"
+#define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
+
+/* TODO: copied from ehci-hcd.c - can this be refactored? */
+/*
+ * handshake - spin reading hc until handshake completes or fails
+ * @ptr: address of hc register to be read
+ * @mask: bits to look at in result of read
+ * @done: value of those bits when handshake succeeds
+ * @usec: timeout in microseconds
+ *
+ * Returns negative errno, or zero on success
+ *
+ * Success happens when the "mask" bits have the specified value (hardware
+ * handshake done). There are two failure modes: "usec" have passed (major
+ * hardware flakeout), or the register reads as all-ones (hardware removed).
+ */
+static int handshake(struct xhci_hcd *xhci, void __iomem *ptr,
+ u32 mask, u32 done, int usec)
+{
+ u32 result;
+
+ do {
+ result = xhci_readl(xhci, ptr);
+ if (result == ~(u32)0) /* card removed */
+ return -ENODEV;
+ result &= mask;
+ if (result == done)
+ return 0;
+ udelay(1);
+ usec--;
+ } while (usec > 0);
+ return -ETIMEDOUT;
+}
+
+/*
+ * Force HC into halt state.
+ *
+ * Disable any IRQs and clear the run/stop bit.
+ * HC will complete any current and actively pipelined transactions, and
+ * should halt within 16 microframes of the run/stop bit being cleared.
+ * Read HC Halted bit in the status register to see when the HC is finished.
+ * XXX: shouldn't we set HC_STATE_HALT here somewhere?
+ */
+int xhci_halt(struct xhci_hcd *xhci)
+{
+ u32 halted;
+ u32 cmd;
+ u32 mask;
+
+ xhci_dbg(xhci, "// Halt the HC\n");
+ /* Disable all interrupts from the host controller */
+ mask = ~(XHCI_IRQS);
+ halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT;
+ if (!halted)
+ mask &= ~CMD_RUN;
+
+ cmd = xhci_readl(xhci, &xhci->op_regs->command);
+ cmd &= mask;
+ xhci_writel(xhci, cmd, &xhci->op_regs->command);
+
+ return handshake(xhci, &xhci->op_regs->status,
+ STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
+}
+
+/*
+ * Reset a halted HC, and set the internal HC state to HC_STATE_HALT.
+ *
+ * This resets pipelines, timers, counters, state machines, etc.
+ * Transactions will be terminated immediately, and operational registers
+ * will be set to their defaults.
+ */
+int xhci_reset(struct xhci_hcd *xhci)
+{
+ u32 command;
+ u32 state;
+
+ state = xhci_readl(xhci, &xhci->op_regs->status);
+ BUG_ON((state & STS_HALT) == 0);
+
+ xhci_dbg(xhci, "// Reset the HC\n");
+ command = xhci_readl(xhci, &xhci->op_regs->command);
+ command |= CMD_RESET;
+ xhci_writel(xhci, command, &xhci->op_regs->command);
+ /* XXX: Why does EHCI set this here? Shouldn't other code do this? */
+ xhci_to_hcd(xhci)->state = HC_STATE_HALT;
+
+ return handshake(xhci, &xhci->op_regs->command, CMD_RESET, 0, 250 * 1000);
+}
+
+/*
+ * Stop the HC from processing the endpoint queues.
+ */
+static void xhci_quiesce(struct xhci_hcd *xhci)
+{
+ /*
+ * Queues are per endpoint, so we need to disable an endpoint or slot.
+ *
+ * To disable a slot, we need to insert a disable slot command on the
+ * command ring and ring the doorbell. This will also free any internal
+ * resources associated with the slot (which might not be what we want).
+ *
+ * A Release Endpoint command sounds better - doesn't free internal HC
+ * memory, but removes the endpoints from the schedule and releases the
+ * bandwidth, disables the doorbells, and clears the endpoint enable
+ * flag. Usually used prior to a set interface command.
+ *
+ * TODO: Implement after command ring code is done.
+ */
+ BUG_ON(!HC_IS_RUNNING(xhci_to_hcd(xhci)->state));
+ xhci_dbg(xhci, "Finished quiescing -- code not written yet\n");
+}
+
+#if 0
+/* Set up MSI-X table for entry 0 (may claim other entries later) */
+static int xhci_setup_msix(struct xhci_hcd *xhci)
+{
+ int ret;
+ struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+
+ xhci->msix_count = 0;
+ /* XXX: did I do this right? ixgbe does kcalloc for more than one */
+ xhci->msix_entries = kmalloc(sizeof(struct msix_entry), GFP_KERNEL);
+ if (!xhci->msix_entries) {
+ xhci_err(xhci, "Failed to allocate MSI-X entries\n");
+ return -ENOMEM;
+ }
+ xhci->msix_entries[0].entry = 0;
+
+ ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
+ if (ret) {
+ xhci_err(xhci, "Failed to enable MSI-X\n");
+ goto free_entries;
+ }
+
+ /*
+ * Pass the xhci pointer value as the request_irq "cookie".
+ * If more irqs are added, this will need to be unique for each one.
+ */
+ ret = request_irq(xhci->msix_entries[0].vector, &xhci_irq, 0,
+ "xHCI", xhci_to_hcd(xhci));
+ if (ret) {
+ xhci_err(xhci, "Failed to allocate MSI-X interrupt\n");
+ goto disable_msix;
+ }
+ xhci_dbg(xhci, "Finished setting up MSI-X\n");
+ return 0;
+
+disable_msix:
+ pci_disable_msix(pdev);
+free_entries:
+ kfree(xhci->msix_entries);
+ xhci->msix_entries = NULL;
+ return ret;
+}
+
+/* XXX: code duplication; can xhci_setup_msix call this? */
+/* Free any IRQs and disable MSI-X */
+static void xhci_cleanup_msix(struct xhci_hcd *xhci)
+{
+ struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+ if (!xhci->msix_entries)
+ return;
+
+ free_irq(xhci->msix_entries[0].vector, xhci);
+ pci_disable_msix(pdev);
+ kfree(xhci->msix_entries);
+ xhci->msix_entries = NULL;
+ xhci_dbg(xhci, "Finished cleaning up MSI-X\n");
+}
+#endif
+
+/*
+ * Initialize memory for HCD and xHC (one-time init).
+ *
+ * Program the PAGESIZE register, initialize the device context array, create
+ * device contexts (?), set up a command ring segment (or two?), create event
+ * ring (one for now).
+ */
+int xhci_init(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int retval = 0;
+
+ xhci_dbg(xhci, "xhci_init\n");
+ spin_lock_init(&xhci->lock);
+ retval = xhci_mem_init(xhci, GFP_KERNEL);
+ xhci_dbg(xhci, "Finished xhci_init\n");
+
+ return retval;
+}
+
+/*
+ * Start the HC after it was halted.
+ *
+ * This function is called by the USB core when the HC driver is added.
+ * Its opposite is xhci_stop().
+ *
+ * xhci_init() must be called once before this function can be called.
+ * Reset the HC, enable device slot contexts, program DCBAAP, and
+ * set command ring pointer and event ring pointer.
+ *
+ * Setup MSI-X vectors and enable interrupts.
+ */
+int xhci_run(struct usb_hcd *hcd)
+{
+ u32 temp;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ xhci_dbg(xhci, "xhci_run\n");
+
+#if 0 /* FIXME: MSI not setup yet */
+ /* Do this at the very last minute */
+ ret = xhci_setup_msix(xhci);
+ if (!ret)
+ return ret;
+
+ return -ENOSYS;
+#endif
+ xhci_dbg(xhci, "// Set the interrupt modulation register\n");
+ temp = xhci_readl(xhci, &xhci->ir_set->irq_control);
+ temp &= 0xffff;
+ temp |= (u32) 160;
+ xhci_writel(xhci, temp, &xhci->ir_set->irq_control);
+
+ /* Set the HCD state before we enable the irqs */
+ hcd->state = HC_STATE_RUNNING;
+ temp = xhci_readl(xhci, &xhci->op_regs->command);
+ temp |= (CMD_EIE);
+ xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n",
+ temp);
+ xhci_writel(xhci, temp, &xhci->op_regs->command);
+
+ temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+ xhci_dbg(xhci, "// Enabling event ring interrupter 0x%x"
+ " by writing 0x%x to irq_pending\n",
+ (unsigned int) xhci->ir_set,
+ (unsigned int) ER_IRQ_ENABLE(temp));
+ xhci_writel(xhci, ER_IRQ_ENABLE(temp),
+ &xhci->ir_set->irq_pending);
+ xhci_print_ir_set(xhci, xhci->ir_set, 0);
+
+ temp = xhci_readl(xhci, &xhci->op_regs->command);
+ temp |= (CMD_RUN);
+ xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n",
+ temp);
+ xhci_writel(xhci, temp, &xhci->op_regs->command);
+ /* Flush PCI posted writes */
+ temp = xhci_readl(xhci, &xhci->op_regs->command);
+ xhci_dbg(xhci, "// @%x = 0x%x\n",
+ (unsigned int) &xhci->op_regs->command, temp);
+
+ xhci_dbg(xhci, "Finished xhci_run\n");
+ return 0;
+}
+
+/*
+ * Stop xHCI driver.
+ *
+ * This function is called by the USB core when the HC driver is removed.
+ * Its opposite is xhci_run().
+ *
+ * Disable device contexts, disable IRQs, and quiesce the HC.
+ * Reset the HC, finish any completed transactions, and cleanup memory.
+ */
+void xhci_stop(struct usb_hcd *hcd)
+{
+ u32 temp;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ spin_lock_irq(&xhci->lock);
+ if (HC_IS_RUNNING(hcd->state))
+ xhci_quiesce(xhci);
+ xhci_halt(xhci);
+ xhci_reset(xhci);
+ spin_unlock_irq(&xhci->lock);
+
+#if 0 /* No MSI yet */
+ xhci_cleanup_msix(xhci);
+#endif
+ xhci_dbg(xhci, "// Disabling event ring interrupts\n");
+ temp = xhci_readl(xhci, &xhci->op_regs->status);
+ xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status);
+ temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+ xhci_writel(xhci, ER_IRQ_DISABLE(temp),
+ &xhci->ir_set->irq_pending);
+ xhci_print_ir_set(xhci, xhci->ir_set, 0);
+
+ xhci_dbg(xhci, "cleaning up memory\n");
+ xhci_mem_cleanup(xhci);
+ xhci_dbg(xhci, "xhci_stop completed - status = %x\n",
+ xhci_readl(xhci, &xhci->op_regs->status));
+}
+
+/*
+ * Shutdown HC (not bus-specific)
+ *
+ * This is called when the machine is rebooting or halting. We assume that the
+ * machine will be powered off, and the HC's internal state will be reset.
+ * Don't bother to free memory.
+ */
+void xhci_shutdown(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ spin_lock_irq(&xhci->lock);
+ xhci_halt(xhci);
+ spin_unlock_irq(&xhci->lock);
+
+#if 0
+ xhci_cleanup_msix(xhci);
+#endif
+
+ xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n",
+ xhci_readl(xhci, &xhci->op_regs->status));
+}
+
+int xhci_get_frame(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ /* EHCI mods by the periodic size. Why? */
+ return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3;
+}
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
+
+static int __init xhci_hcd_init(void)
+{
+#ifdef CONFIG_PCI
+ int retval = 0;
+
+ retval = xhci_register_pci();
+
+ if (retval < 0) {
+ printk(KERN_DEBUG "Problem registering PCI driver.");
+ return retval;
+ }
+#endif
+ return 0;
+}
+module_init(xhci_hcd_init);
+
+static void __exit xhci_hcd_cleanup(void)
+{
+#ifdef CONFIG_PCI
+ xhci_unregister_pci();
+#endif
+}
+module_exit(xhci_hcd_cleanup);
--- /dev/null
+/*
+ * 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/usb.h>
+
+#include "xhci.h"
+
+void xhci_mem_cleanup(struct xhci_hcd *xhci)
+{
+ xhci->page_size = 0;
+ xhci->page_shift = 0;
+}
+
+int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
+{
+ unsigned int val, val2;
+ u32 page_size;
+ int i;
+
+ page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
+ xhci_dbg(xhci, "Supported page size register = 0x%x\n", page_size);
+ for (i = 0; i < 16; i++) {
+ if ((0x1 & page_size) != 0)
+ break;
+ page_size = page_size >> 1;
+ }
+ if (i < 16)
+ xhci_dbg(xhci, "Supported page size of %iK\n", (1 << (i+12)) / 1024);
+ else
+ xhci_warn(xhci, "WARN: no supported page size\n");
+ /* Use 4K pages, since that's common and the minimum the HC supports */
+ xhci->page_shift = 12;
+ xhci->page_size = 1 << xhci->page_shift;
+ xhci_dbg(xhci, "HCD page size set to %iK\n", xhci->page_size / 1024);
+
+ /*
+ * Program the Number of Device Slots Enabled field in the CONFIG
+ * register with the max value of slots the HC can handle.
+ */
+ val = HCS_MAX_SLOTS(xhci_readl(xhci, &xhci->cap_regs->hcs_params1));
+ xhci_dbg(xhci, "// xHC can handle at most %d device slots.\n",
+ (unsigned int) val);
+ val2 = xhci_readl(xhci, &xhci->op_regs->config_reg);
+ val |= (val2 & ~HCS_SLOTS_MASK);
+ xhci_dbg(xhci, "// Setting Max device slots reg = 0x%x.\n",
+ (unsigned int) val);
+ xhci_writel(xhci, val, &xhci->op_regs->config_reg);
+
+ xhci->ir_set = &xhci->run_regs->ir_set[0];
+
+ return 0;
+fail:
+ xhci_warn(xhci, "Couldn't initialize memory\n");
+ xhci_mem_cleanup(xhci);
+ return -ENOMEM;
+}
--- /dev/null
+/*
+ * xHCI host controller driver PCI Bus Glue.
+ *
+ * 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/pci.h>
+
+#include "xhci.h"
+
+static const char hcd_name[] = "xhci_hcd";
+
+/* called after powerup, by probe or system-pm "wakeup" */
+static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
+{
+ /*
+ * TODO: Implement finding debug ports later.
+ * TODO: see if there are any quirks that need to be added to handle
+ * new extended capabilities.
+ */
+
+ /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
+ if (!pci_set_mwi(pdev))
+ xhci_dbg(xhci, "MWI active\n");
+
+ xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
+ return 0;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_pci_setup(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
+ int retval;
+
+ xhci->cap_regs = hcd->regs;
+ xhci->op_regs = hcd->regs +
+ HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
+ xhci->run_regs = hcd->regs +
+ (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
+ /* Cache read-only capability registers */
+ xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
+ xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
+ xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+ xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ xhci_print_registers(xhci);
+
+ /* Make sure the HC is halted. */
+ retval = xhci_halt(xhci);
+ if (retval)
+ return retval;
+
+ xhci_dbg(xhci, "Resetting HCD\n");
+ /* Reset the internal HC memory state and registers. */
+ retval = xhci_reset(xhci);
+ if (retval)
+ return retval;
+ xhci_dbg(xhci, "Reset complete\n");
+
+ xhci_dbg(xhci, "Calling HCD init\n");
+ /* Initialize HCD and host controller data structures. */
+ retval = xhci_init(hcd);
+ if (retval)
+ return retval;
+ xhci_dbg(xhci, "Called HCD init\n");
+
+ pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
+ xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
+
+ /* Find any debug ports */
+ return xhci_pci_reinit(xhci, pdev);
+}
+
+static const struct hc_driver xhci_pci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "xHCI Host Controller",
+ .hcd_priv_size = sizeof(struct xhci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .flags = HCD_MEMORY | HCD_USB3,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = xhci_pci_setup,
+ .start = xhci_run,
+ /* suspend and resume implemented later */
+ .stop = xhci_stop,
+ .shutdown = xhci_shutdown,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = xhci_get_frame,
+
+ /* Implement root hub support later. */
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* PCI driver selection metadata; PCI hotplugging uses this */
+static const struct pci_device_id pci_ids[] = { {
+ /* handle any USB 3.0 xHCI controller */
+ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
+ .driver_data = (unsigned long) &xhci_pci_hc_driver,
+ },
+ { /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+/* pci driver glue; this is a "new style" PCI driver module */
+static struct pci_driver xhci_pci_driver = {
+ .name = (char *) hcd_name,
+ .id_table = pci_ids,
+
+ .probe = usb_hcd_pci_probe,
+ .remove = usb_hcd_pci_remove,
+ /* suspend and resume implemented later */
+
+ .shutdown = usb_hcd_pci_shutdown,
+};
+
+int xhci_register_pci()
+{
+ return pci_register_driver(&xhci_pci_driver);
+}
+
+void xhci_unregister_pci()
+{
+ pci_unregister_driver(&xhci_pci_driver);
+}
/* xHCI PCI Configuration Registers */
#define XHCI_SBRN_OFFSET (0x60)
+/* Max number of USB devices for any host controller - limit in section 6.1 */
+#define MAX_HC_SLOTS 256
+
/*
* xHCI register interface.
* This corresponds to the eXtensible Host Controller Interface (xHCI)
u32 erst_dequeue[2];
} __attribute__ ((packed));
+/* irq_pending bitmasks */
#define ER_IRQ_PENDING(p) ((p) & 0x1)
-#define ER_IRQ_ENABLE(p) ((p) | 0x2)
+/* bits 2:31 need to be preserved */
+#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
+#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
+#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
+
+/* irq_control bitmasks */
+/* Minimum interval between interrupts (in 250ns intervals). The interval
+ * between interrupts will be longer if there are no events on the event ring.
+ * Default is 4000 (1 ms).
+ */
+#define ER_IRQ_INTERVAL_MASK (0xffff)
+/* Counter used to count down the time to the next interrupt - HW use only */
+#define ER_IRQ_COUNTER_MASK (0xffff << 16)
+
+/* erst_size bitmasks */
/* Preserve bits 16:31 of erst_size */
-#define ERST_SIZE_MASK (0xffff<<16)
+#define ERST_SIZE_MASK (0xffff << 16)
+
+/* erst_dequeue bitmasks */
+/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
+ * where the current dequeue pointer lies. This is an optional HW hint.
+ */
+#define ERST_DESI_MASK (0x7)
+/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
+ * a work queue (or delayed service routine)?
+ */
+#define ERST_EHB (1 << 3)
/**
* struct xhci_run_regs
struct xhci_cap_regs __iomem *cap_regs;
struct xhci_op_regs __iomem *op_regs;
struct xhci_run_regs __iomem *run_regs;
+ /* Our HCD's current interrupter register set */
+ struct intr_reg __iomem *ir_set;
/* Cached register copies of read-only HC data */
__u32 hcs_params1;
u8 isoc_threshold;
int event_ring_max;
int addr_64;
+ /* 4KB min, 128MB max */
int page_size;
+ /* Valid values are 12 to 20, inclusive */
+ int page_shift;
+ /* only one MSI vector for now, but might need more later */
+ int msix_count;
+ struct msix_entry *msix_entries;
};
/* convert between an HCD pointer and the corresponding EHCI_HCD */
writel(val, regs);
}
+/* xHCI debugging */
+void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num);
+void xhci_print_registers(struct xhci_hcd *xhci);
+
+/* xHCI memory managment */
+void xhci_mem_cleanup(struct xhci_hcd *xhci);
+int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
+
+#ifdef CONFIG_PCI
+/* xHCI PCI glue */
+int xhci_register_pci(void);
+void xhci_unregister_pci(void);
+#endif
+
+/* xHCI host controller glue */
+int xhci_halt(struct xhci_hcd *xhci);
+int xhci_reset(struct xhci_hcd *xhci);
+int xhci_init(struct usb_hcd *hcd);
+int xhci_run(struct usb_hcd *hcd);
+void xhci_stop(struct usb_hcd *hcd);
+void xhci_shutdown(struct usb_hcd *hcd);
+int xhci_get_frame(struct usb_hcd *hcd);
+
#endif /* __LINUX_XHCI_HCD_H */
#define PCI_CLASS_SERIAL_USB_UHCI 0x0c0300
#define PCI_CLASS_SERIAL_USB_OHCI 0x0c0310
#define PCI_CLASS_SERIAL_USB_EHCI 0x0c0320
+#define PCI_CLASS_SERIAL_USB_XHCI 0x0c0330
#define PCI_CLASS_SERIAL_FIBER 0x0c04
#define PCI_CLASS_SERIAL_SMBUS 0x0c05
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff