165 lines
5.2 KiB
C
165 lines
5.2 KiB
C
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2010 Patrick Georgi
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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//#define USB_DEBUG
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#include <libpayload.h>
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#include "ohci_private.h"
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#include "ohci.h"
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typedef struct {
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int numports;
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int *port;
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} rh_inst_t;
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#define RH_INST(dev) ((rh_inst_t*)(dev)->data)
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static void
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ohci_rh_enable_port (usbdev_t *dev, int port)
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{
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if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
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return;
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OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortEnable; // enable port
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mdelay(10);
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while (!(OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) mdelay(1);
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OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortReset; // reset port
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while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortResetStatus) mdelay(1);
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OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = PortResetStatusChange;
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}
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/* disable root hub */
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static void
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ohci_rh_disable_port (usbdev_t *dev, int port)
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{
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OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ClearPortEnable; // disable port
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while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus) mdelay(1);
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}
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static void
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ohci_rh_scanport (usbdev_t *dev, int port)
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{
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if (port >= RH_INST(dev)->numports) {
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debug("Invalid port %d\n", port);
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return;
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}
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/* device registered, and device change logged, so something must have happened */
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if (RH_INST (dev)->port[port] != -1) {
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usb_detach_device(dev->controller, RH_INST (dev)->port[port]);
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RH_INST (dev)->port[port] = -1;
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}
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/* no device attached
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previously registered devices are detached, nothing left to do */
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if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
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return;
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OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ConnectStatusChange; // clear port state change
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ohci_rh_enable_port (dev, port);
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mdelay(100); // wait for signal to stabilize
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if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) {
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debug ("port enable failed\n");
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return;
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}
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int speed = (OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & LowSpeedDeviceAttached) != 0;
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RH_INST (dev)->port[port] = usb_attach_device(dev->controller, dev->address, port, speed);
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}
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static int
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ohci_rh_report_port_changes (usbdev_t *dev)
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{
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int i;
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if (!(OHCI_INST (dev->controller)->opreg->HcInterruptStatus & RootHubStatusChange)) return -1;
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OHCI_INST (dev->controller)->opreg->HcInterruptStatus = RootHubStatusChange;
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debug("port change\n");
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for (i = 0; i < RH_INST(dev)->numports; i++) {
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// maybe detach+attach happened between two scans?
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if (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[i] & ConnectStatusChange) {
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debug("attachment change on port %d\n", i);
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return i;
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}
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}
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// no change
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return -1;
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}
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static void
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ohci_rh_destroy (usbdev_t *dev)
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{
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int i;
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for (i = 0; i < RH_INST (dev)->numports; i++)
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ohci_rh_disable_port (dev, i);
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free (RH_INST (dev));
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}
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static void
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ohci_rh_poll (usbdev_t *dev)
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{
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int port;
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while ((port = ohci_rh_report_port_changes (dev)) != -1)
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ohci_rh_scanport (dev, port);
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}
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void
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ohci_rh_init (usbdev_t *dev)
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{
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int i;
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dev->destroy = ohci_rh_destroy;
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dev->poll = ohci_rh_poll;
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dev->data = malloc (sizeof (rh_inst_t));
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if (!dev->data)
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usb_fatal ("Not enough memory for OHCI RH.\n");
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RH_INST (dev)->numports = OHCI_INST (dev->controller)->opreg->HcRhDescriptorA & NumberDownstreamPortsMask;
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RH_INST (dev)->port = malloc(sizeof(int) * RH_INST (dev)->numports);
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debug("%d ports registered\n", RH_INST (dev)->numports);
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for (i = 0; i < RH_INST (dev)->numports; i++) {
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ohci_rh_enable_port (dev, i);
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RH_INST (dev)->port[i] = -1;
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}
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/* we can set them here because a root hub _really_ shouldn't
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appear elsewhere */
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dev->address = 0;
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dev->hub = -1;
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dev->port = -1;
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debug("rh init done\n");
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}
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