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/*
* 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");
}
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