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]);
57 volatile portsc_t tmp;
59 debug("giving up port %x, it's USB1\n", port+1);
61 /* Lowspeed device. Hand over to companion */
65 do {} while (!p->conn_status_change);
66 /* RW/C register, so clear it by writing 1 */
68 tmp.conn_status_change = 1;
74 ehci_rh_scanport (usbdev_t *dev, int port)
76 volatile portsc_t *p = &(RH_INST(dev)->ports[port]);
77 volatile portsc_t tmp;
78 if (RH_INST(dev)->devices[port]!=-1) {
79 debug("Unregister device at port %x\n", port+1);
80 usb_detach_device(dev->controller, RH_INST(dev)->devices[port]);
81 RH_INST(dev)->devices[port]=-1;
83 /* device connected, handle */
84 if (p->current_conn_status) {
86 if (p->line_status == 0x1) {
87 ehci_rh_hand_over_port(dev, port);
91 /* Deassert enable, assert reset. These must change
99 /* Wait a bit while reset is active. */
102 /* Deassert reset. */
106 /* Wait for flag change to finish. The controller might take a while */
107 while (p->port_reset) ;
108 if (!p->port_enable) {
109 ehci_rh_hand_over_port(dev, port);
112 debug("port %x hosts a USB2 device\n", port+1);
113 RH_INST(dev)->devices[port] = usb_attach_device(dev->controller, dev->address, port, 2);
115 /* RW/C register, so clear it by writing 1 */
117 tmp.conn_status_change = 1;
122 ehci_rh_report_port_changes (usbdev_t *dev)
125 for (i=0; i<RH_INST(dev)->n_ports; i++) {
126 if (RH_INST(dev)->ports[i].conn_status_change)
133 ehci_rh_poll (usbdev_t *dev)
136 while ((port = ehci_rh_report_port_changes (dev)) != -1)
137 ehci_rh_scanport (dev, port);
142 ehci_rh_init (usbdev_t *dev)
145 volatile portsc_t *p;
146 volatile portsc_t tmp;
148 dev->destroy = ehci_rh_destroy;
149 dev->poll = ehci_rh_poll;
151 dev->data = malloc(sizeof(rh_inst_t));
153 RH_INST(dev)->n_ports = EHCI_INST(dev->controller)->capabilities->n_ports;
154 RH_INST(dev)->ports = EHCI_INST(dev->controller)->operation->portsc;
156 debug("root hub has %x ports\n", RH_INST(dev)->n_ports);
158 RH_INST(dev)->devices = malloc(RH_INST(dev)->n_ports * sizeof(int));
159 for (i=0; i < RH_INST(dev)->n_ports; i++) {
160 p = &(RH_INST(dev)->ports[i]);
161 RH_INST(dev)->devices[i] = -1;