From: Weitao Wang WeitaoWang-oc@zhaoxin.com
commit d9b0328d0b8b8298dfdc97cd8e0e2371d4bcc97b upstream.
Some ZHAOXIN xHCI controllers follow usb3.1 spec, but only support gen1 speed 5Gbps. While in Linux kernel, if xHCI suspport usb3.1, root hub speed will show on 10Gbps. To fix this issue of ZHAOXIN xHCI platforms, read usb speed ID supported by xHCI to determine root hub speed. And add a quirk XHCI_ZHAOXIN_HOST for this issue.
[fix warning about uninitialized symbol -Mathias]
Suggested-by: Mathias Nyman mathias.nyman@linux.intel.com Cc: stable@vger.kernel.org Signed-off-by: Weitao Wang WeitaoWang-oc@zhaoxin.com Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Message-ID: 20230602144009.1225632-11-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-mem.c | 31 ++++++++++++++++++++++++------- drivers/usb/host/xhci-pci.c | 2 ++ drivers/usb/host/xhci.h | 1 + 3 files changed, 27 insertions(+), 7 deletions(-)
--- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2128,7 +2128,7 @@ static void xhci_add_in_port(struct xhci { u32 temp, port_offset, port_count; int i; - u8 major_revision, minor_revision; + u8 major_revision, minor_revision, tmp_minor_revision; struct xhci_hub *rhub; struct device *dev = xhci_to_hcd(xhci)->self.sysdev; struct xhci_port_cap *port_cap; @@ -2148,6 +2148,15 @@ static void xhci_add_in_port(struct xhci */ if (minor_revision > 0x00 && minor_revision < 0x10) minor_revision <<= 4; + /* + * Some zhaoxin's xHCI controller that follow usb3.1 spec + * but only support Gen1. + */ + if (xhci->quirks & XHCI_ZHAOXIN_HOST) { + tmp_minor_revision = minor_revision; + minor_revision = 0; + } + } else if (major_revision <= 0x02) { rhub = &xhci->usb2_rhub; } else { @@ -2157,10 +2166,6 @@ static void xhci_add_in_port(struct xhci /* Ignoring port protocol we can't understand. FIXME */ return; } - rhub->maj_rev = XHCI_EXT_PORT_MAJOR(temp); - - if (rhub->min_rev < minor_revision) - rhub->min_rev = minor_revision;
/* Port offset and count in the third dword, see section 7.2 */ temp = readl(addr + 2); @@ -2179,8 +2184,6 @@ static void xhci_add_in_port(struct xhci if (xhci->num_port_caps > max_caps) return;
- port_cap->maj_rev = major_revision; - port_cap->min_rev = minor_revision; port_cap->psi_count = XHCI_EXT_PORT_PSIC(temp);
if (port_cap->psi_count) { @@ -2201,6 +2204,11 @@ static void xhci_add_in_port(struct xhci XHCI_EXT_PORT_PSIV(port_cap->psi[i - 1]))) port_cap->psi_uid_count++;
+ if (xhci->quirks & XHCI_ZHAOXIN_HOST && + major_revision == 0x03 && + XHCI_EXT_PORT_PSIV(port_cap->psi[i]) >= 5) + minor_revision = tmp_minor_revision; + xhci_dbg(xhci, "PSIV:%d PSIE:%d PLT:%d PFD:%d LP:%d PSIM:%d\n", XHCI_EXT_PORT_PSIV(port_cap->psi[i]), XHCI_EXT_PORT_PSIE(port_cap->psi[i]), @@ -2210,6 +2218,15 @@ static void xhci_add_in_port(struct xhci XHCI_EXT_PORT_PSIM(port_cap->psi[i])); } } + + rhub->maj_rev = major_revision; + + if (rhub->min_rev < minor_revision) + rhub->min_rev = minor_revision; + + port_cap->maj_rev = major_revision; + port_cap->min_rev = minor_revision; + /* cache usb2 port capabilities */ if (major_revision < 0x03 && xhci->num_ext_caps < max_caps) xhci->ext_caps[xhci->num_ext_caps++] = temp; --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -337,6 +337,8 @@ static void xhci_pci_quirks(struct devic xhci->quirks |= XHCI_NO_SOFT_RETRY;
if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) { + xhci->quirks |= XHCI_ZHAOXIN_HOST; + if (pdev->device == 0x9202) { xhci->quirks |= XHCI_RESET_ON_RESUME; xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH; --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1907,6 +1907,7 @@ struct xhci_hcd { #define XHCI_SUSPEND_RESUME_CLKS BIT_ULL(43) #define XHCI_RESET_TO_DEFAULT BIT_ULL(44) #define XHCI_ZHAOXIN_TRB_FETCH BIT_ULL(45) +#define XHCI_ZHAOXIN_HOST BIT_ULL(46)
unsigned int num_active_eps; unsigned int limit_active_eps;