usb/xhci: move xhci_gen_setup() away from -pci.

xhci_gen_setup() is generic so it can be used to perform the bare xhci
setup even on non-pci based platform. The typedef for the function
pointer is moved into the headerfile

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 89 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index a8c3e8a34d26..2409bbe1b223 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3944,6 +3944,95 @@ int xhci_get_frame(struct usb_hcd *hcd)
         return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3;
 }
 
+int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
+{
+        struct xhci_hcd         *xhci;
+        struct device           *dev = hcd->self.controller;
+        int                     retval;
+        u32                     temp;
+
+        hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
+
+        if (usb_hcd_is_primary_hcd(hcd)) {
+                xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL);
+                if (!xhci)
+                        return -ENOMEM;
+                *((struct xhci_hcd **) hcd->hcd_priv) = xhci;
+                xhci->main_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;
+        } else {
+                /* xHCI private pointer was set in xhci_pci_probe for the second
+                 * registered roothub.
+                 */
+                xhci = hcd_to_xhci(hcd);
+                temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+                if (HCC_64BIT_ADDR(temp)) {
+                        xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
+                        dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
+                } else {
+                        dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
+                }
+                return 0;
+        }
+
+        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->hc_capbase);
+        xhci->hci_version = HC_VERSION(xhci->hcc_params);
+        xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+        xhci_print_registers(xhci);
+
+        get_quirks(dev, xhci);
+
+        /* Make sure the HC is halted. */
+        retval = xhci_halt(xhci);
+        if (retval)
+                goto error;
+
+        xhci_dbg(xhci, "Resetting HCD\n");
+        /* Reset the internal HC memory state and registers. */
+        retval = xhci_reset(xhci);
+        if (retval)
+                goto error;
+        xhci_dbg(xhci, "Reset complete\n");
+
+        temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+        if (HCC_64BIT_ADDR(temp)) {
+                xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
+                dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
+        } else {
+                dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
+        }
+
+        xhci_dbg(xhci, "Calling HCD init\n");
+        /* Initialize HCD and host controller data structures. */
+        retval = xhci_init(hcd);
+        if (retval)
+                goto error;
+        xhci_dbg(xhci, "Called HCD init\n");
+        return 0;
+error:
+        kfree(xhci);
+        return retval;
+}
+
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_LICENSE("GPL");