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944e7deb42
linux/drivers/usb/host/xhci-pci.c
Josue David Hernandez Gutierrez 944e7deb42 xhci: Avoid PCI MSI/MSIX interrupt reinitialization at resume 
xhci MSI setup is currently done at the same time as xHC host is started
in xhci_run(). This couples the generic xhci code with PCI, and will
reconfigure MSI/MSIX interrupts every time xHC is started.

Decouple MSI/MSIX configuration from generic xhci code by moving MSI/MSIX
part to a PCI specific xhci_pci_run() function overriding xhci_run().

This allows us to remove unnecessay MSI/MSIX reconfiguration done every
time PCI xhci resumes from suspend. i.e. remove the xhci_cleanup_msix()
call from xhci_resume() and the xhci_try_enale_msi() call in xhci_run()
called a bit later by xhci_resume()

[minor changes and commit message rewrite -Mathias]

Signed-off-by: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230317154715.535523-10-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-23 17:25:22 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* xHCI host controller driver PCI Bus Glue.
*
* Copyright (C) 2008 Intel Corp.
*
* Author: Sarah Sharp
* Some code borrowed from the Linux EHCI driver.
*/
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/reset.h>
#include "xhci.h"
#include "xhci-trace.h"
#include "xhci-pci.h"
#define SSIC_PORT_NUM 2
#define SSIC_PORT_CFG2 0x880c
#define SSIC_PORT_CFG2_OFFSET 0x30
#define PROG_DONE (1 << 30)
#define SSIC_PORT_UNUSED (1 << 31)
#define SPARSE_DISABLE_BIT 17
#define SPARSE_CNTL_ENABLE 0xC12C
/* 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_FL1009 0x1009
#define PCI_DEVICE_ID_FRESCO_LOGIC_FL1100 0x1100
#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_WILDCATPOINT_LP_XHCI 0x9cb1
#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
#define PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI 0x0aa8
#define PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI 0x1aa8
#define PCI_DEVICE_ID_INTEL_APL_XHCI 0x5aa8
#define PCI_DEVICE_ID_INTEL_DNV_XHCI 0x19d0
#define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI 0x15b5
#define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI 0x15b6
#define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_XHCI 0x15c1
#define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI 0x15db
#define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI 0x15d4
#define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI 0x15e9
#define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI 0x15ec
#define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI 0x15f0
#define PCI_DEVICE_ID_INTEL_ICE_LAKE_XHCI 0x8a13
#define PCI_DEVICE_ID_INTEL_CML_XHCI 0xa3af
#define PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI 0x9a13
#define PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI 0x1138
#define PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI 0x51ed
#define PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_PCH_XHCI 0x54ed
#define PCI_DEVICE_ID_AMD_RENOIR_XHCI 0x1639
#define PCI_DEVICE_ID_AMD_PROMONTORYA_4 0x43b9
#define PCI_DEVICE_ID_AMD_PROMONTORYA_3 0x43ba
#define PCI_DEVICE_ID_AMD_PROMONTORYA_2 0x43bb
#define PCI_DEVICE_ID_AMD_PROMONTORYA_1 0x43bc
#define PCI_DEVICE_ID_ASMEDIA_1042_XHCI 0x1042
#define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI 0x1142
#define PCI_DEVICE_ID_ASMEDIA_1142_XHCI 0x1242
#define PCI_DEVICE_ID_ASMEDIA_2142_XHCI 0x2142
#define PCI_DEVICE_ID_ASMEDIA_3242_XHCI 0x3242
static const char hcd_name[] = "xhci_hcd";
static struct hc_driver __read_mostly xhci_pci_hc_driver;
static int xhci_pci_setup(struct usb_hcd *hcd);
static int xhci_pci_run(struct usb_hcd *hcd);
static int xhci_pci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
static const struct xhci_driver_overrides xhci_pci_overrides __initconst = {
.reset = xhci_pci_setup,
.start = xhci_pci_run,
.update_hub_device = xhci_pci_update_hub_device,
};
static int xhci_pci_run(struct usb_hcd *hcd)
{
int ret;
if (usb_hcd_is_primary_hcd(hcd)) {
ret = xhci_try_enable_msi(hcd);
if (ret)
return ret;
}
return xhci_run(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;
}
static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct xhci_driver_data *driver_data;
const struct pci_device_id *id;
id = pci_match_id(to_pci_driver(pdev->dev.driver)->id_table, pdev);
if (id && id->driver_data) {
driver_data = (struct xhci_driver_data *)id->driver_data;
xhci->quirks |= driver_data->quirks;
}
/* 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,
"XHCI_RESET_EP_QUIRK for this evaluation HW is deprecated");
}
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_FRESCO_LOGIC &&
pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1009)
xhci->quirks |= XHCI_BROKEN_STREAMS;
if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1100)
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_quirk_pll_check())
xhci->quirks |= XHCI_AMD_PLL_FIX;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&
(pdev->device == 0x145c ||
pdev->device == 0x15e0 ||
pdev->device == 0x15e1 ||
pdev->device == 0x43bb))
xhci->quirks |= XHCI_SUSPEND_DELAY;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&
(pdev->device == 0x15e0 || pdev->device == 0x15e1))
xhci->quirks |= XHCI_SNPS_BROKEN_SUSPEND;
if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x15e5) {
xhci->quirks |= XHCI_DISABLE_SPARSE;
xhci->quirks |= XHCI_RESET_ON_RESUME;
}
if (pdev->vendor == PCI_VENDOR_ID_AMD)
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
if ((pdev->vendor == PCI_VENDOR_ID_AMD) &&
((pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4) ||
(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_3) ||
(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2) ||
(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_1)))
xhci->quirks |= XHCI_U2_DISABLE_WAKE;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&
pdev->device == PCI_DEVICE_ID_AMD_RENOIR_XHCI)
xhci->quirks |= XHCI_BROKEN_D3COLD;
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 ||
pdev->device == PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_XHCI)) {
xhci->quirks |= XHCI_SPURIOUS_REBOOT;
xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
}
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 ||
pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_CML_XHCI)) {
xhci->quirks |= XHCI_PME_STUCK_QUIRK;
}
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)
xhci->quirks |= XHCI_SSIC_PORT_UNUSED;
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
(pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI))
xhci->quirks |= XHCI_INTEL_USB_ROLE_SW;
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
(pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI))
xhci->quirks |= XHCI_MISSING_CAS;
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
(pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_PCH_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_N_PCH_XHCI))
xhci->quirks |= XHCI_RESET_TO_DEFAULT;
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
(pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_ICE_LAKE_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI ||
pdev->device == PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI))
xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
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 == 0x0014) {
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
xhci->quirks |= XHCI_ZERO_64B_REGS;
}
if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
pdev->device == 0x0015) {
xhci->quirks |= XHCI_RESET_ON_RESUME;
xhci->quirks |= XHCI_ZERO_64B_REGS;
}
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_VIA && pdev->device == 0x3483) {
xhci->quirks |= XHCI_LPM_SUPPORT;
xhci->quirks |= XHCI_EP_CTX_BROKEN_DCS;
}
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
pdev->device == PCI_DEVICE_ID_ASMEDIA_1042_XHCI) {
/*
* try to tame the ASMedia 1042 controller which reports 0.96
* but appears to behave more like 1.0
*/
xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
xhci->quirks |= XHCI_BROKEN_STREAMS;
}
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI) {
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
}
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
(pdev->device == PCI_DEVICE_ID_ASMEDIA_1142_XHCI ||
pdev->device == PCI_DEVICE_ID_ASMEDIA_2142_XHCI ||
pdev->device == PCI_DEVICE_ID_ASMEDIA_3242_XHCI))
xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
xhci->quirks |= XHCI_ASMEDIA_MODIFY_FLOWCONTROL;
if (pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241)
xhci->quirks |= XHCI_LIMIT_ENDPOINT_INTERVAL_7;
if ((pdev->vendor == PCI_VENDOR_ID_BROADCOM ||
pdev->vendor == PCI_VENDOR_ID_CAVIUM) &&
pdev->device == 0x9026)
xhci->quirks |= XHCI_RESET_PLL_ON_DISCONNECT;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&
(pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2 ||
pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4))
xhci->quirks |= XHCI_NO_SOFT_RETRY;
/* xHC spec requires PCI devices to support D3hot and D3cold */
if (xhci->hci_version >= 0x120)
xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
if (xhci->quirks & XHCI_RESET_ON_RESUME)
xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
"QUIRK: Resetting on resume");
}
#ifdef CONFIG_ACPI
static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
{
static const guid_t intel_dsm_guid =
GUID_INIT(0xac340cb7, 0xe901, 0x45bf,
0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
union acpi_object *obj;
obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_guid, 3, 1,
NULL);
ACPI_FREE(obj);
}
static void xhci_find_lpm_incapable_ports(struct usb_hcd *hcd, struct usb_device *hdev)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct xhci_hub *rhub = &xhci->usb3_rhub;
int ret;
int i;
/* This is not the usb3 roothub we are looking for */
if (hcd != rhub->hcd)
return;
if (hdev->maxchild > rhub->num_ports) {
dev_err(&hdev->dev, "USB3 roothub port number mismatch\n");
return;
}
for (i = 0; i < hdev->maxchild; i++) {
ret = usb_acpi_port_lpm_incapable(hdev, i);
dev_dbg(&hdev->dev, "port-%d disable U1/U2 _DSM: %d\n", i + 1, ret);
if (ret >= 0) {
rhub->ports[i]->lpm_incapable = ret;
continue;
}
}
}
#else
static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
static void xhci_find_lpm_incapable_ports(struct usb_hcd *hcd, struct usb_device *hdev) { }
#endif /* CONFIG_ACPI */
/* 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;
xhci = hcd_to_xhci(hcd);
if (!xhci->sbrn)
pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
/* imod_interval is the interrupt moderation value in nanoseconds. */
xhci->imod_interval = 40000;
retval = xhci_gen_setup(hcd, xhci_pci_quirks);
if (retval)
return retval;
if (!usb_hcd_is_primary_hcd(hcd))
return 0;
if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
xhci_pme_acpi_rtd3_enable(pdev);
xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
/* Find any debug ports */
return xhci_pci_reinit(xhci, pdev);
}
static int xhci_pci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags)
{
/* Check if acpi claims some USB3 roothub ports are lpm incapable */
if (!hdev->parent)
xhci_find_lpm_incapable_ports(hcd, hdev);
return xhci_update_hub_device(hcd, hdev, tt, mem_flags);
}
/*
* 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 usb_hcd *hcd;
struct xhci_driver_data *driver_data;
struct reset_control *reset;
driver_data = (struct xhci_driver_data *)id->driver_data;
if (driver_data && driver_data->quirks & XHCI_RENESAS_FW_QUIRK) {
retval = renesas_xhci_check_request_fw(dev, id);
if (retval)
return retval;
}
reset = devm_reset_control_get_optional_exclusive(&dev->dev, NULL);
if (IS_ERR(reset))
return PTR_ERR(reset);
reset_control_reset(reset);
/* 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, &xhci_pci_hc_driver);
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->reset = reset;
xhci->shared_hcd = usb_create_shared_hcd(&xhci_pci_hc_driver, &dev->dev,
pci_name(dev), hcd);
if (!xhci->shared_hcd) {
retval = -ENOMEM;
goto dealloc_usb2_hcd;
}
retval = xhci_ext_cap_init(xhci);
if (retval)
goto put_usb3_hcd;
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);
if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
pm_runtime_allow(&dev->dev);
dma_set_max_seg_size(&dev->dev, UINT_MAX);
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));
xhci->xhc_state |= XHCI_STATE_REMOVING;
if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
pm_runtime_forbid(&dev->dev);
if (xhci->shared_hcd) {
usb_remove_hcd(xhci->shared_hcd);
usb_put_hcd(xhci->shared_hcd);
xhci->shared_hcd = NULL;
}
/* Workaround for spurious wakeups at shutdown with HSW */
if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
pci_set_power_state(dev, PCI_D3hot);
usb_hcd_pci_remove(dev);
}
#ifdef CONFIG_PM
/*
* In some Intel xHCI controllers, in order to get D3 working,
* through a vendor specific SSIC CONFIG register at offset 0x883c,
* SSIC PORT need to be marked as "unused" before putting xHCI
* into D3. After D3 exit, the SSIC port need to be marked as "used".
* Without this change, xHCI might not enter D3 state.
*/
static void xhci_ssic_port_unused_quirk(struct usb_hcd *hcd, bool suspend)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
u32 val;
void __iomem *reg;
int i;
for (i = 0; i < SSIC_PORT_NUM; i++) {
reg = (void __iomem *) xhci->cap_regs +
SSIC_PORT_CFG2 +
i * SSIC_PORT_CFG2_OFFSET;
/* Notify SSIC that SSIC profile programming is not done. */
val = readl(reg) & ~PROG_DONE;
writel(val, reg);
/* Mark SSIC port as unused(suspend) or used(resume) */
val = readl(reg);
if (suspend)
val |= SSIC_PORT_UNUSED;
else
val &= ~SSIC_PORT_UNUSED;
writel(val, reg);
/* Notify SSIC that SSIC profile programming is done */
val = readl(reg) | PROG_DONE;
writel(val, reg);
readl(reg);
}
}
/*
* 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 usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
void __iomem *reg;
u32 val;
reg = (void __iomem *) xhci->cap_regs + 0x80a4;
val = readl(reg);
writel(val | BIT(28), reg);
readl(reg);
}
static void xhci_sparse_control_quirk(struct usb_hcd *hcd)
{
u32 reg;
reg = readl(hcd->regs + SPARSE_CNTL_ENABLE);
reg &= ~BIT(SPARSE_DISABLE_BIT);
writel(reg, hcd->regs + SPARSE_CNTL_ENABLE);
}
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);
int ret;
/*
* 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 | XHCI_BROKEN_D3COLD))
pci_d3cold_disable(pdev);
if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
xhci_pme_quirk(hcd);
if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
xhci_ssic_port_unused_quirk(hcd, true);
if (xhci->quirks & XHCI_DISABLE_SPARSE)
xhci_sparse_control_quirk(hcd);
ret = xhci_suspend(xhci, do_wakeup);
if (ret && (xhci->quirks & XHCI_SSIC_PORT_UNUSED))
xhci_ssic_port_unused_quirk(hcd, false);
return ret;
}
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;
reset_control_reset(xhci->reset);
/* 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_SSIC_PORT_UNUSED)
xhci_ssic_port_unused_quirk(hcd, false);
if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
xhci_pme_quirk(hcd);
retval = xhci_resume(xhci, hibernated);
return retval;
}
static int xhci_pci_poweroff_late(struct usb_hcd *hcd, bool do_wakeup)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct xhci_port *port;
struct usb_device *udev;
unsigned int slot_id;
u32 portsc;
int i;
/*
* Systems with XHCI_RESET_TO_DEFAULT quirk have boot firmware that
* cause significant boot delay if usb ports are in suspended U3 state
* during boot. Some USB devices survive in U3 state over S4 hibernate
*
* Disable ports that are in U3 if remote wake is not enabled for either
* host controller or connected device
*/
if (!(xhci->quirks & XHCI_RESET_TO_DEFAULT))
return 0;
for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
port = &xhci->hw_ports[i];
portsc = readl(port->addr);
if ((portsc & PORT_PLS_MASK) != XDEV_U3)
continue;
slot_id = xhci_find_slot_id_by_port(port->rhub->hcd, xhci,
port->hcd_portnum + 1);
if (!slot_id || !xhci->devs[slot_id]) {
xhci_err(xhci, "No dev for slot_id %d for port %d-%d in U3\n",
slot_id, port->rhub->hcd->self.busnum, port->hcd_portnum + 1);
continue;
}
udev = xhci->devs[slot_id]->udev;
/* if wakeup is enabled then don't disable the port */
if (udev->do_remote_wakeup && do_wakeup)
continue;
xhci_dbg(xhci, "port %d-%d in U3 without wakeup, disable it\n",
port->rhub->hcd->self.busnum, port->hcd_portnum + 1);
portsc = xhci_port_state_to_neutral(portsc);
writel(portsc | PORT_PE, port->addr);
}
return 0;
}
static void xhci_pci_shutdown(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
xhci_shutdown(hcd);
/* Yet another workaround for spurious wakeups at shutdown with HSW */
if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
pci_set_power_state(pdev, PCI_D3hot);
}
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
static const struct xhci_driver_data reneses_data = {
.quirks = XHCI_RENESAS_FW_QUIRK,
.firmware = "renesas_usb_fw.mem",
};
/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids[] = {
{ PCI_DEVICE(0x1912, 0x0014),
.driver_data = (unsigned long)&reneses_data,
},
{ PCI_DEVICE(0x1912, 0x0015),
.driver_data = (unsigned long)&reneses_data,
},
/* handle any USB 3.0 xHCI controller */
{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
},
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
/*
* Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
* load firmware, so don't encumber the xhci-pci driver with it.
*/
#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
MODULE_FIRMWARE("renesas_usb_fw.mem");
#endif
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver xhci_pci_driver = {
.name = hcd_name,
.id_table = pci_ids,
.probe = xhci_pci_probe,
.remove = xhci_pci_remove,
/* suspend and resume implemented later */
.shutdown = usb_hcd_pci_shutdown,
.driver = {
#ifdef CONFIG_PM
.pm = &usb_hcd_pci_pm_ops,
#endif
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
static int __init xhci_pci_init(void)
{
xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
#ifdef CONFIG_PM
xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
xhci_pci_hc_driver.pci_poweroff_late = xhci_pci_poweroff_late;
xhci_pci_hc_driver.shutdown = xhci_pci_shutdown;
#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");
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