1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008-2010 coresystems GmbH
*
* 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 "uhci.h"
#include "uhci_private.h"
typedef struct {
int port[2];
} rh_inst_t;
#define RH_INST(dev) ((rh_inst_t*)(dev)->data)
static void
uhci_rh_enable_port (usbdev_t *dev, int port)
{
u16 value;
hci_t *controller = dev->controller;
if (port == 1)
port = PORTSC1;
else if (port == 2)
port = PORTSC2;
else {
debug("Invalid port %d\n", port);
return;
}
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) & ~(1 << 12)); /* wakeup */
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) | 1 << 9); /* reset */
mdelay (30); // >10ms
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) & ~(1 << 9));
mdelay (1); // >5.3us per spec, <3ms because some devices make trouble
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) | 1 << 2); /* enable */
/* wait for controller to enable port */
/* TOTEST: how long to wait? 100ms for now */
int timeout = 200; /* time out after 200 * 500us == 100ms */
do {
value = uhci_reg_read16 (controller, port);
udelay(500); timeout--;
} while (((value & (1 << 2)) == 0) && (value & 0x01) && timeout);
if (!timeout)
debug("Warning: uhci_rh: port enabling timed out.\n");
}
/* disable root hub */
static void
uhci_rh_disable_port (usbdev_t *dev, int port)
{
hci_t *controller = dev->controller;
port = PORTSC2;
if (port == 1)
port = PORTSC1;
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) & ~4);
u16 value;
/* wait for controller to disable port */
/* TOTEST: how long to wait? 100ms for now */
int timeout = 200; /* time out after 200 * 500us == 100ms */
do {
value = uhci_reg_read16 (controller, port);
udelay(500); timeout--;
} while (((value & (1 << 2)) != 0) && timeout);
if (!timeout)
debug("Warning: uhci_rh: port disabling timed out.\n");
}
static void
uhci_rh_scanport (usbdev_t *dev, int port)
{
int portsc, offset;
if (port == 1) {
portsc = PORTSC1;
offset = 0;
} else if (port == 2) {
portsc = PORTSC2;
offset = 1;
} else {
debug("Invalid port %d\n", port);
return;
}
int devno = RH_INST (dev)->port[offset];
if ((dev->controller->devices[devno] != 0) && (devno != -1)) {
usb_detach_device(dev->controller, devno);
RH_INST (dev)->port[offset] = -1;
}
uhci_reg_write16(dev->controller, portsc,
uhci_reg_read16(dev->controller, portsc) | (1 << 3) | (1 << 2)); // clear port state change, enable port
mdelay(100); // wait for signal to stabilize
if ((uhci_reg_read16 (dev->controller, portsc) & 1) != 0) {
// device attached
uhci_rh_disable_port (dev, port);
uhci_rh_enable_port (dev, port);
int speed = ((uhci_reg_read16 (dev->controller, portsc) >> 8) & 1);
RH_INST (dev)->port[offset] = usb_attach_device(dev->controller, dev->address, portsc, speed);
}
}
static int
uhci_rh_report_port_changes (usbdev_t *dev)
{
u16 stored, real;
stored = (RH_INST (dev)->port[0] == -1);
real = ((uhci_reg_read16 (dev->controller, PORTSC1) & 1) == 0);
if (stored != real) {
debug("change on port 1\n");
return 1;
}
stored = (RH_INST (dev)->port[1] == -1);
real = ((uhci_reg_read16 (dev->controller, PORTSC2) & 1) == 0);
if (stored != real) {
debug("change on port 2\n");
return 2;
}
// maybe detach+attach happened between two scans?
if ((uhci_reg_read16 (dev->controller, PORTSC1) & 2) > 0) {
debug("possibly re-attached on port 1\n");
return 1;
}
if ((uhci_reg_read16 (dev->controller, PORTSC2) & 2) > 0) {
debug("possibly re-attached on port 2\n");
return 2;
}
// no change
return -1;
}
static void
uhci_rh_destroy (usbdev_t *dev)
{
uhci_rh_disable_port (dev, 1);
uhci_rh_disable_port (dev, 2);
free (RH_INST (dev));
}
static void
uhci_rh_poll (usbdev_t *dev)
{
int port;
while ((port = uhci_rh_report_port_changes (dev)) != -1)
uhci_rh_scanport (dev, port);
}
void
uhci_rh_init (usbdev_t *dev)
{
dev->destroy = uhci_rh_destroy;
dev->poll = uhci_rh_poll;
uhci_rh_enable_port (dev, 1);
uhci_rh_enable_port (dev, 2);
dev->data = malloc (sizeof (rh_inst_t));
if (!dev->data)
fatal("Not enough memory for UHCI RH.\n");
RH_INST (dev)->port[0] = -1;
RH_INST (dev)->port[1] = -1;
/* we can set them here because a root hub _really_ shouldn't
appear elsewhere */
dev->address = 0;
dev->hub = -1;
dev->port = -1;
}
|
