| /* |
| * This file is part of the libpayload project. |
| * |
| * Copyright (C) 2010 Patrick Georgi |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #define USB_DEBUG |
| |
| #include <libpayload.h> |
| #include "xhci_private.h" |
| #include "xhci.h" |
| |
| typedef struct { |
| int numports; |
| int *port; |
| } rh_inst_t; |
| |
| #define RH_INST(dev) ((rh_inst_t*)(dev)->data) |
| |
| static void |
| xhci_rh_enable_port (usbdev_t *dev, int port) |
| { |
| // FIXME: check power situation? |
| // enable slot |
| // attach device context to slot |
| // address device |
| } |
| |
| /* disable root hub */ |
| static void |
| xhci_rh_disable_port (usbdev_t *dev, int port) |
| { |
| } |
| |
| static void |
| xhci_rh_scanport (usbdev_t *dev, int port) |
| { |
| // clear CSC |
| int val = XHCI_INST (dev->controller)->opreg->prs[port].portsc; |
| val &= PORTSC_RW_MASK; |
| val |= PORTSC_CSC; |
| XHCI_INST (dev->controller)->opreg->prs[port].portsc = val; |
| |
| usb_debug("device attach status on port %x: %x\n", port, XHCI_INST (dev->controller)->opreg->prs[port].portsc & PORTSC_CCS); |
| } |
| |
| static int |
| xhci_rh_report_port_changes (usbdev_t *dev) |
| { |
| int i; |
| // no change |
| if (!(XHCI_INST (dev->controller)->opreg->usbsts & USBSTS_PCD)) |
| return -1; |
| |
| for (i = 0; i < RH_INST (dev)->numports; i++) { |
| if (XHCI_INST (dev->controller)->opreg->prs[i].portsc & PORTSC_CSC) { |
| usb_debug("found connect status change on port %d\n", i); |
| return i; |
| } |
| } |
| |
| return -1; // shouldn't ever happen |
| } |
| |
| static void |
| xhci_rh_destroy (usbdev_t *dev) |
| { |
| int i; |
| for (i = 0; i < RH_INST (dev)->numports; i++) |
| xhci_rh_disable_port (dev, i); |
| free (RH_INST (dev)); |
| } |
| |
| static void |
| xhci_rh_poll (usbdev_t *dev) |
| { |
| int port; |
| while ((port = xhci_rh_report_port_changes (dev)) != -1) |
| xhci_rh_scanport (dev, port); |
| } |
| |
| void |
| xhci_rh_init (usbdev_t *dev) |
| { |
| int i; |
| |
| dev->destroy = xhci_rh_destroy; |
| dev->poll = xhci_rh_poll; |
| |
| dev->data = malloc (sizeof (rh_inst_t)); |
| if (!dev->data) |
| fatal("Not enough memory for XHCI RH.\n"); |
| |
| RH_INST (dev)->numports = XHCI_INST (dev->controller)->capreg->MaxPorts; |
| RH_INST (dev)->port = malloc(sizeof(int) * RH_INST (dev)->numports); |
| usb_debug("%d ports registered\n", RH_INST (dev)->numports); |
| |
| for (i = 0; i < RH_INST (dev)->numports; i++) { |
| xhci_rh_enable_port (dev, i); |
| RH_INST (dev)->port[i] = -1; |
| } |
| |
| /* we can set them here because a root hub _really_ shouldn't |
| appear elsewhere */ |
| dev->address = 0; |
| dev->hub = -1; |
| dev->port = -1; |
| |
| usb_debug("rh init done\n"); |
| } |