2 * This file is part of the libpayload project.
4 * Copyright (C) 2010 Patrick Georgi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <libpayload.h>
33 #include "ohci_private.h"
41 #define RH_INST(dev) ((rh_inst_t*)(dev)->data)
44 ohci_rh_enable_port (usbdev_t *dev, int port)
46 if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
49 OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortEnable; // enable port
51 while (!(OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) mdelay(1);
52 OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortReset; // reset port
53 while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortResetStatus) mdelay(1);
54 OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = PortResetStatusChange;
57 /* disable root hub */
59 ohci_rh_disable_port (usbdev_t *dev, int port)
61 OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ClearPortEnable; // disable port
62 while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus) mdelay(1);
66 ohci_rh_scanport (usbdev_t *dev, int port)
68 if (port >= RH_INST(dev)->numports) {
69 debug("Invalid port %d\n", port);
73 /* device registered, and device change logged, so something must have happened */
74 if (RH_INST (dev)->port[port] != -1) {
75 usb_detach_device(dev->controller, RH_INST (dev)->port[port]);
76 RH_INST (dev)->port[port] = -1;
80 previously registered devices are detached, nothing left to do */
81 if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
84 OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ConnectStatusChange; // clear port state change
85 ohci_rh_enable_port (dev, port);
87 mdelay(100); // wait for signal to stabilize
89 if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) {
90 debug ("port enable failed\n");
94 int speed = (OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & LowSpeedDeviceAttached) != 0;
95 RH_INST (dev)->port[port] = usb_attach_device(dev->controller, dev->address, port, speed);
99 ohci_rh_report_port_changes (usbdev_t *dev)
103 if (!(OHCI_INST (dev->controller)->opreg->HcInterruptStatus & RootHubStatusChange)) return -1;
104 OHCI_INST (dev->controller)->opreg->HcInterruptStatus = RootHubStatusChange;
105 debug("port change\n");
107 for (i = 0; i < RH_INST(dev)->numports; i++) {
108 // maybe detach+attach happened between two scans?
109 if (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[i] & ConnectStatusChange) {
110 debug("attachment change on port %d\n", i);
120 ohci_rh_destroy (usbdev_t *dev)
123 for (i = 0; i < RH_INST (dev)->numports; i++)
124 ohci_rh_disable_port (dev, i);
125 free (RH_INST (dev));
129 ohci_rh_poll (usbdev_t *dev)
132 while ((port = ohci_rh_report_port_changes (dev)) != -1)
133 ohci_rh_scanport (dev, port);
137 ohci_rh_init (usbdev_t *dev)
141 dev->destroy = ohci_rh_destroy;
142 dev->poll = ohci_rh_poll;
144 dev->data = malloc (sizeof (rh_inst_t));
146 usb_fatal ("Not enough memory for OHCI RH.\n");
148 RH_INST (dev)->numports = OHCI_INST (dev->controller)->opreg->HcRhDescriptorA & NumberDownstreamPortsMask;
149 RH_INST (dev)->port = malloc(sizeof(int) * RH_INST (dev)->numports);
150 debug("%d ports registered\n", RH_INST (dev)->numports);
152 for (i = 0; i < RH_INST (dev)->numports; i++) {
153 ohci_rh_enable_port (dev, i);
154 RH_INST (dev)->port[i] = -1;
157 /* we can set them here because a root hub _really_ shouldn't
163 debug("rh init done\n");