2 * This file is part of the libpayload project.
4 * Copyright (C) 2010 coresystems GmbH
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
30 #include <libpayload.h>
32 #include "ehci_private.h"
36 /* typical C, n_ports is the number
37 * of ports, while ports[] spans [0,n_ports-1],
38 * even though the spec counts from 1.
40 volatile portsc_t *ports;
44 #define RH_INST(dev) ((rh_inst_t*)(dev)->data)
47 ehci_rh_destroy (usbdev_t *dev)
49 free (RH_INST(dev)->devices);
54 ehci_rh_hand_over_port (usbdev_t *dev, int port)
56 volatile portsc_t *p = &(RH_INST(dev)->ports[port]);
58 debug("giving up port %x, it's USB1\n", port+1);
60 /* Lowspeed device. Hand over to companion */
62 do {} while (!(*p & P_CONN_STATUS_CHANGE));
63 /* RW/C register, so clear it by writing 1 */
64 *p |= P_CONN_STATUS_CHANGE;
69 ehci_rh_scanport (usbdev_t *dev, int port)
71 volatile portsc_t *p = &(RH_INST(dev)->ports[port]);
72 if (RH_INST(dev)->devices[port]!=-1) {
73 debug("Unregister device at port %x\n", port+1);
74 usb_detach_device(dev->controller, RH_INST(dev)->devices[port]);
75 RH_INST(dev)->devices[port]=-1;
77 /* device connected, handle */
78 if (*p & P_CURR_CONN_STATUS) {
80 if ((*p & P_LINE_STATUS) == P_LINE_STATUS_LOWSPEED) {
81 ehci_rh_hand_over_port(dev, port);
85 /* Deassert enable, assert reset. These must change
88 *p = (*p & ~P_PORT_ENABLE) | P_PORT_RESET;
90 /* Wait a bit while reset is active. */
96 /* Wait for flag change to finish. The controller might take a while */
97 while (*p & P_PORT_RESET) ;
98 if (!(*p & P_PORT_ENABLE)) {
99 ehci_rh_hand_over_port(dev, port);
102 debug("port %x hosts a USB2 device\n", port+1);
103 RH_INST(dev)->devices[port] = usb_attach_device(dev->controller, dev->address, port, 2);
105 /* RW/C register, so clear it by writing 1 */
106 *p |= P_CONN_STATUS_CHANGE;
110 ehci_rh_report_port_changes (usbdev_t *dev)
113 for (i=0; i<RH_INST(dev)->n_ports; i++) {
114 if (RH_INST(dev)->ports[i] & P_CONN_STATUS_CHANGE)
121 ehci_rh_poll (usbdev_t *dev)
124 while ((port = ehci_rh_report_port_changes (dev)) != -1)
125 ehci_rh_scanport (dev, port);
130 ehci_rh_init (usbdev_t *dev)
133 volatile portsc_t *p;
135 dev->destroy = ehci_rh_destroy;
136 dev->poll = ehci_rh_poll;
138 dev->data = malloc(sizeof(rh_inst_t));
140 RH_INST(dev)->n_ports = EHCI_INST(dev->controller)->capabilities->hcsparams & HCS_NPORTS_MASK;
141 RH_INST(dev)->ports = EHCI_INST(dev->controller)->operation->portsc;
143 debug("root hub has %x ports\n", RH_INST(dev)->n_ports);
145 RH_INST(dev)->devices = malloc(RH_INST(dev)->n_ports * sizeof(int));
146 for (i=0; i < RH_INST(dev)->n_ports; i++) {
147 p = &(RH_INST(dev)->ports[i]);
148 RH_INST(dev)->devices[i] = -1;
150 ehci_rh_scanport(dev, i);