diff options
Diffstat (limited to 'drivers/usb/host/xhci-pci.c')
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c new file mode 100644 index 000000000..2af32e26f --- /dev/null +++ b/drivers/usb/host/xhci-pci.c @@ -0,0 +1,398 @@ +/* + * 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 <linux/slab.h> +#include <linux/module.h> + +#include "xhci.h" +#include "xhci-trace.h" + +/* Device for a quirk */ +#define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73 +#define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000 +#define PCI_DEVICE_ID_FRESCO_LOGIC_FL1400 0x1400 + +#define PCI_VENDOR_ID_ETRON 0x1b6f +#define PCI_DEVICE_ID_EJ168 0x7023 + +#define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI 0x8c31 +#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31 +#define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI 0x22b5 +#define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI 0xa12f +#define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI 0x9d2f + +static const char hcd_name[] = "xhci_hcd"; + +static struct hc_driver __read_mostly xhci_pci_hc_driver; + +/* 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; +} + +static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + /* Look for vendor-specific quirks */ + if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC && + (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK || + pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1400)) { + if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK && + pdev->revision == 0x0) { + xhci->quirks |= XHCI_RESET_EP_QUIRK; + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "QUIRK: Fresco Logic xHC needs configure" + " endpoint cmd after reset endpoint"); + } + if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK && + pdev->revision == 0x4) { + xhci->quirks |= XHCI_SLOW_SUSPEND; + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "QUIRK: Fresco Logic xHC revision %u" + "must be suspended extra slowly", + pdev->revision); + } + if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK) + xhci->quirks |= XHCI_BROKEN_STREAMS; + /* Fresco Logic confirms: all revisions of this chip do not + * support MSI, even though some of them claim to in their PCI + * capabilities. + */ + xhci->quirks |= XHCI_BROKEN_MSI; + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "QUIRK: Fresco Logic revision %u " + "has broken MSI implementation", + pdev->revision); + xhci->quirks |= XHCI_TRUST_TX_LENGTH; + } + + if (pdev->vendor == PCI_VENDOR_ID_NEC) + xhci->quirks |= XHCI_NEC_HOST; + + if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96) + xhci->quirks |= XHCI_AMD_0x96_HOST; + + /* AMD PLL quirk */ + if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) + xhci->quirks |= XHCI_AMD_PLL_FIX; + + if (pdev->vendor == PCI_VENDOR_ID_AMD) + xhci->quirks |= XHCI_TRUST_TX_LENGTH; + + if (pdev->vendor == PCI_VENDOR_ID_INTEL) { + xhci->quirks |= XHCI_LPM_SUPPORT; + xhci->quirks |= XHCI_INTEL_HOST; + xhci->quirks |= XHCI_AVOID_BEI; + } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) { + xhci->quirks |= XHCI_EP_LIMIT_QUIRK; + xhci->limit_active_eps = 64; + xhci->quirks |= XHCI_SW_BW_CHECKING; + /* + * PPT desktop boards DH77EB and DH77DF will power back on after + * a few seconds of being shutdown. The fix for this is to + * switch the ports from xHCI to EHCI on shutdown. We can't use + * DMI information to find those particular boards (since each + * vendor will change the board name), so we have to key off all + * PPT chipsets. + */ + xhci->quirks |= XHCI_SPURIOUS_REBOOT; + } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI) { + xhci->quirks |= XHCI_SPURIOUS_REBOOT; + } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI || + pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI || + pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)) { + xhci->quirks |= XHCI_PME_STUCK_QUIRK; + } + if (pdev->vendor == PCI_VENDOR_ID_ETRON && + pdev->device == PCI_DEVICE_ID_EJ168) { + xhci->quirks |= XHCI_RESET_ON_RESUME; + xhci->quirks |= XHCI_TRUST_TX_LENGTH; + xhci->quirks |= XHCI_BROKEN_STREAMS; + } + if (pdev->vendor == PCI_VENDOR_ID_RENESAS && + pdev->device == 0x0015) + xhci->quirks |= XHCI_RESET_ON_RESUME; + if (pdev->vendor == PCI_VENDOR_ID_VIA) + xhci->quirks |= XHCI_RESET_ON_RESUME; + + /* See https://bugzilla.kernel.org/show_bug.cgi?id=79511 */ + if (pdev->vendor == PCI_VENDOR_ID_VIA && + pdev->device == 0x3432) + xhci->quirks |= XHCI_BROKEN_STREAMS; + + if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA && + pdev->device == 0x1042) + xhci->quirks |= XHCI_BROKEN_STREAMS; + + if (xhci->quirks & XHCI_RESET_ON_RESUME) + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "QUIRK: Resetting on resume"); +} + +/* + * Make sure PME works on some Intel xHCI controllers by writing 1 to clear + * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4 + */ +static void xhci_pme_quirk(struct xhci_hcd *xhci) +{ + u32 val; + void __iomem *reg; + + reg = (void __iomem *) xhci->cap_regs + 0x80a4; + val = readl(reg); + writel(val | BIT(28), reg); + readl(reg); +} + +/* called during probe() after chip reset completes */ +static int xhci_pci_setup(struct usb_hcd *hcd) +{ + struct xhci_hcd *xhci; + struct pci_dev *pdev = to_pci_dev(hcd->self.controller); + int retval; + + retval = xhci_gen_setup(hcd, xhci_pci_quirks); + if (retval) + return retval; + + xhci = hcd_to_xhci(hcd); + if (!usb_hcd_is_primary_hcd(hcd)) + return 0; + + 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 */ + retval = xhci_pci_reinit(xhci, pdev); + if (!retval) + return retval; + + kfree(xhci); + return retval; +} + +/* + * We need to register our own PCI probe function (instead of the USB core's + * function) in order to create a second roothub under xHCI. + */ +static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + int retval; + struct xhci_hcd *xhci; + struct hc_driver *driver; + struct usb_hcd *hcd; + + driver = (struct hc_driver *)id->driver_data; + + /* Prevent runtime suspending between USB-2 and USB-3 initialization */ + pm_runtime_get_noresume(&dev->dev); + + /* Register the USB 2.0 roothub. + * FIXME: USB core must know to register the USB 2.0 roothub first. + * This is sort of silly, because we could just set the HCD driver flags + * to say USB 2.0, but I'm not sure what the implications would be in + * the other parts of the HCD code. + */ + retval = usb_hcd_pci_probe(dev, id); + + if (retval) + goto put_runtime_pm; + + /* USB 2.0 roothub is stored in the PCI device now. */ + hcd = dev_get_drvdata(&dev->dev); + xhci = hcd_to_xhci(hcd); + xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev, + pci_name(dev), hcd); + if (!xhci->shared_hcd) { + retval = -ENOMEM; + goto dealloc_usb2_hcd; + } + + /* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset) + * is called by usb_add_hcd(). + */ + *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci; + + retval = usb_add_hcd(xhci->shared_hcd, dev->irq, + IRQF_SHARED); + if (retval) + goto put_usb3_hcd; + /* Roothub already marked as USB 3.0 speed */ + + if (!(xhci->quirks & XHCI_BROKEN_STREAMS) && + HCC_MAX_PSA(xhci->hcc_params) >= 4) + xhci->shared_hcd->can_do_streams = 1; + + /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */ + pm_runtime_put_noidle(&dev->dev); + + return 0; + +put_usb3_hcd: + usb_put_hcd(xhci->shared_hcd); +dealloc_usb2_hcd: + usb_hcd_pci_remove(dev); +put_runtime_pm: + pm_runtime_put_noidle(&dev->dev); + return retval; +} + +static void xhci_pci_remove(struct pci_dev *dev) +{ + struct xhci_hcd *xhci; + + xhci = hcd_to_xhci(pci_get_drvdata(dev)); + if (xhci->shared_hcd) { + usb_remove_hcd(xhci->shared_hcd); + usb_put_hcd(xhci->shared_hcd); + } + usb_hcd_pci_remove(dev); + + /* Workaround for spurious wakeups at shutdown with HSW */ + if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) + pci_set_power_state(dev, PCI_D3hot); + + kfree(xhci); +} + +#ifdef CONFIG_PM +static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct pci_dev *pdev = to_pci_dev(hcd->self.controller); + + /* + * Systems with the TI redriver that loses port status change events + * need to have the registers polled during D3, so avoid D3cold. + */ + if (xhci->quirks & XHCI_COMP_MODE_QUIRK) + pdev->no_d3cold = true; + + if (xhci->quirks & XHCI_PME_STUCK_QUIRK) + xhci_pme_quirk(xhci); + + return xhci_suspend(xhci, do_wakeup); +} + +static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct pci_dev *pdev = to_pci_dev(hcd->self.controller); + int retval = 0; + + /* The BIOS on systems with the Intel Panther Point chipset may or may + * not support xHCI natively. That means that during system resume, it + * may switch the ports back to EHCI so that users can use their + * keyboard to select a kernel from GRUB after resume from hibernate. + * + * The BIOS is supposed to remember whether the OS had xHCI ports + * enabled before resume, and switch the ports back to xHCI when the + * BIOS/OS semaphore is written, but we all know we can't trust BIOS + * writers. + * + * Unconditionally switch the ports back to xHCI after a system resume. + * It should not matter whether the EHCI or xHCI controller is + * resumed first. It's enough to do the switchover in xHCI because + * USB core won't notice anything as the hub driver doesn't start + * running again until after all the devices (including both EHCI and + * xHCI host controllers) have been resumed. + */ + + if (pdev->vendor == PCI_VENDOR_ID_INTEL) + usb_enable_intel_xhci_ports(pdev); + + if (xhci->quirks & XHCI_PME_STUCK_QUIRK) + xhci_pme_quirk(xhci); + + retval = xhci_resume(xhci, hibernated); + return retval; +} +#endif /* CONFIG_PM */ + +/*-------------------------------------------------------------------------*/ + +/* 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 = xhci_pci_probe, + .remove = xhci_pci_remove, + /* suspend and resume implemented later */ + + .shutdown = usb_hcd_pci_shutdown, +#ifdef CONFIG_PM + .driver = { + .pm = &usb_hcd_pci_pm_ops + }, +#endif +}; + +static int __init xhci_pci_init(void) +{ + xhci_init_driver(&xhci_pci_hc_driver, xhci_pci_setup); +#ifdef CONFIG_PM + xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend; + xhci_pci_hc_driver.pci_resume = xhci_pci_resume; +#endif + return pci_register_driver(&xhci_pci_driver); +} +module_init(xhci_pci_init); + +static void __exit xhci_pci_exit(void) +{ + pci_unregister_driver(&xhci_pci_driver); +} +module_exit(xhci_pci_exit); + +MODULE_DESCRIPTION("xHCI PCI Host Controller Driver"); +MODULE_LICENSE("GPL"); |