4 * Copyright (c) 2005 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 void usb_attach(USBPort *port, USBDevice *dev)
28 port->attach(port, dev);
31 /**********************/
32 /* generic USB device helpers (you are not forced to use them when
33 writing your USB device driver, but they help handling the
37 #define SETUP_STATE_IDLE 0
38 #define SETUP_STATE_DATA 1
39 #define SETUP_STATE_ACK 2
41 int usb_generic_handle_packet(USBDevice *s, int pid,
42 uint8_t devaddr, uint8_t devep,
43 uint8_t *data, int len)
49 s->state = USB_STATE_ATTACHED;
52 s->state = USB_STATE_NOTATTACHED;
57 s->state = USB_STATE_DEFAULT;
58 s->handle_reset(s, 0);
61 s->handle_reset(s, 1);
64 if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
68 memcpy(s->setup_buf, data, 8);
69 s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
71 if (s->setup_buf[0] & USB_DIR_IN) {
72 ret = s->handle_control(s,
73 (s->setup_buf[0] << 8) | s->setup_buf[1],
74 (s->setup_buf[3] << 8) | s->setup_buf[2],
75 (s->setup_buf[5] << 8) | s->setup_buf[4],
80 if (ret < s->setup_len)
82 s->setup_state = SETUP_STATE_DATA;
84 if (s->setup_len == 0)
85 s->setup_state = SETUP_STATE_ACK;
87 s->setup_state = SETUP_STATE_DATA;
91 if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
95 switch(s->setup_state) {
97 if (!(s->setup_buf[0] & USB_DIR_IN)) {
98 s->setup_state = SETUP_STATE_IDLE;
99 ret = s->handle_control(s,
100 (s->setup_buf[0] << 8) | s->setup_buf[1],
101 (s->setup_buf[3] << 8) | s->setup_buf[2],
102 (s->setup_buf[5] << 8) | s->setup_buf[4],
111 case SETUP_STATE_DATA:
112 if (s->setup_buf[0] & USB_DIR_IN) {
113 l = s->setup_len - s->setup_index;
116 memcpy(data, s->data_buf + s->setup_index, l);
118 if (s->setup_index >= s->setup_len)
119 s->setup_state = SETUP_STATE_ACK;
122 s->setup_state = SETUP_STATE_IDLE;
131 ret = s->handle_data(s, pid, devep, data, len);
136 if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
137 return USB_RET_NODEV;
140 switch(s->setup_state) {
141 case SETUP_STATE_ACK:
142 if (s->setup_buf[0] & USB_DIR_IN) {
143 s->setup_state = SETUP_STATE_IDLE;
146 /* ignore additionnal output */
149 case SETUP_STATE_DATA:
150 if (!(s->setup_buf[0] & USB_DIR_IN)) {
151 l = s->setup_len - s->setup_index;
154 memcpy(s->data_buf + s->setup_index, data, l);
156 if (s->setup_index >= s->setup_len)
157 s->setup_state = SETUP_STATE_ACK;
160 s->setup_state = SETUP_STATE_IDLE;
169 ret = s->handle_data(s, pid, devep, data, len);
181 /* XXX: fix overflow */
182 int set_usb_string(uint8_t *buf, const char *str)
191 for(i = 0; i < len; i++) {