diff options
Diffstat (limited to 'drivers/usb/host/xhci.c')
| -rw-r--r-- | drivers/usb/host/xhci.c | 104 |
1 files changed, 54 insertions, 50 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 2be38d9de8df..9f801de6d9e0 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -5209,6 +5209,57 @@ static int xhci_get_frame(struct usb_hcd *hcd) return readl(&xhci->run_regs->microframe_index) >> 3; } +static void xhci_hcd_init_usb2_data(struct xhci_hcd *xhci, struct usb_hcd *hcd) +{ + xhci->usb2_rhub.hcd = hcd; + hcd->speed = HCD_USB2; + hcd->self.root_hub->speed = USB_SPEED_HIGH; + /* + * USB 2.0 roothub under xHCI has an integrated TT, + * (rate matching hub) as opposed to having an OHCI/UHCI + * companion controller. + */ + hcd->has_tt = 1; +} + +static void xhci_hcd_init_usb3_data(struct xhci_hcd *xhci, struct usb_hcd *hcd) +{ + unsigned int minor_rev; + + /* + * Early xHCI 1.1 spec did not mention USB 3.1 capable hosts + * should return 0x31 for sbrn, or that the minor revision + * is a two digit BCD containig minor and sub-minor numbers. + * This was later clarified in xHCI 1.2. + * + * Some USB 3.1 capable hosts therefore have sbrn 0x30, and + * minor revision set to 0x1 instead of 0x10. + */ + if (xhci->usb3_rhub.min_rev == 0x1) + minor_rev = 1; + else + minor_rev = xhci->usb3_rhub.min_rev / 0x10; + + switch (minor_rev) { + case 2: + hcd->speed = HCD_USB32; + hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; + hcd->self.root_hub->rx_lanes = 2; + hcd->self.root_hub->tx_lanes = 2; + hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x2; + break; + case 1: + hcd->speed = HCD_USB31; + hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; + hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x1; + break; + } + xhci_info(xhci, "Host supports USB 3.%x %sSuperSpeed\n", + minor_rev, minor_rev ? "Enhanced " : ""); + + xhci->usb3_rhub.hcd = hcd; +} + int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) { struct xhci_hcd *xhci; @@ -5217,7 +5268,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) * quirks */ struct device *dev = hcd->self.sysdev; - unsigned int minor_rev; int retval; /* Accept arbitrarily long scatter-gather lists */ @@ -5232,60 +5282,14 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) xhci = hcd_to_xhci(hcd); if (usb_hcd_is_primary_hcd(hcd)) { - xhci->main_hcd = hcd; - xhci->usb2_rhub.hcd = hcd; - /* Mark the first roothub as being USB 2.0. - * The xHCI driver will register the USB 3.0 roothub. - */ - hcd->speed = HCD_USB2; - hcd->self.root_hub->speed = USB_SPEED_HIGH; - /* - * USB 2.0 roothub under xHCI has an integrated TT, - * (rate matching hub) as opposed to having an OHCI/UHCI - * companion controller. - */ - hcd->has_tt = 1; + xhci_hcd_init_usb2_data(xhci, hcd); } else { - /* - * Early xHCI 1.1 spec did not mention USB 3.1 capable hosts - * should return 0x31 for sbrn, or that the minor revision - * is a two digit BCD containig minor and sub-minor numbers. - * This was later clarified in xHCI 1.2. - * - * Some USB 3.1 capable hosts therefore have sbrn 0x30, and - * minor revision set to 0x1 instead of 0x10. - */ - if (xhci->usb3_rhub.min_rev == 0x1) - minor_rev = 1; - else - minor_rev = xhci->usb3_rhub.min_rev / 0x10; - - switch (minor_rev) { - case 2: - hcd->speed = HCD_USB32; - hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; - hcd->self.root_hub->rx_lanes = 2; - hcd->self.root_hub->tx_lanes = 2; - hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x2; - break; - case 1: - hcd->speed = HCD_USB31; - hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; - hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x1; - break; - } - xhci_info(xhci, "Host supports USB 3.%x %sSuperSpeed\n", - minor_rev, - minor_rev ? "Enhanced " : ""); - - xhci->usb3_rhub.hcd = hcd; - /* xHCI private pointer was set in xhci_pci_probe for the second - * registered roothub. - */ + xhci_hcd_init_usb3_data(xhci, hcd); return 0; } mutex_init(&xhci->mutex); + xhci->main_hcd = hcd; xhci->cap_regs = hcd->regs; xhci->op_regs = hcd->regs + HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)); |