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1 | bb36d470 | bellard | /*
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2 | bb36d470 | bellard | * QEMU USB emulation
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3 | bb36d470 | bellard | *
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4 | bb36d470 | bellard | * Copyright (c) 2005 Fabrice Bellard
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5 | bb36d470 | bellard | *
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6 | bb36d470 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | bb36d470 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | bb36d470 | bellard | * in the Software without restriction, including without limitation the rights
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9 | bb36d470 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | bb36d470 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | bb36d470 | bellard | * furnished to do so, subject to the following conditions:
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12 | bb36d470 | bellard | *
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13 | bb36d470 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | bb36d470 | bellard | * all copies or substantial portions of the Software.
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15 | bb36d470 | bellard | *
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16 | bb36d470 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | bb36d470 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | bb36d470 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | bb36d470 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | bb36d470 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | bb36d470 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | bb36d470 | bellard | * THE SOFTWARE.
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23 | bb36d470 | bellard | */
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24 | bb36d470 | bellard | #include "vl.h" |
25 | bb36d470 | bellard | |
26 | bb36d470 | bellard | void usb_attach(USBPort *port, USBDevice *dev)
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27 | bb36d470 | bellard | { |
28 | bb36d470 | bellard | port->attach(port, dev); |
29 | bb36d470 | bellard | } |
30 | bb36d470 | bellard | |
31 | bb36d470 | bellard | /**********************/
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32 | bb36d470 | bellard | /* generic USB device helpers (you are not forced to use them when
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33 | bb36d470 | bellard | writing your USB device driver, but they help handling the
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34 | bb36d470 | bellard | protocol)
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35 | bb36d470 | bellard | */
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36 | bb36d470 | bellard | |
37 | bb36d470 | bellard | #define SETUP_STATE_IDLE 0 |
38 | bb36d470 | bellard | #define SETUP_STATE_DATA 1 |
39 | bb36d470 | bellard | #define SETUP_STATE_ACK 2 |
40 | bb36d470 | bellard | |
41 | 4d611c9a | pbrook | int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
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42 | bb36d470 | bellard | { |
43 | bb36d470 | bellard | int l, ret = 0; |
44 | 4d611c9a | pbrook | int len = p->len;
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45 | 4d611c9a | pbrook | uint8_t *data = p->data; |
46 | bb36d470 | bellard | |
47 | 4d611c9a | pbrook | switch(p->pid) {
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48 | bb36d470 | bellard | case USB_MSG_ATTACH:
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49 | bb36d470 | bellard | s->state = USB_STATE_ATTACHED; |
50 | bb36d470 | bellard | break;
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51 | bb36d470 | bellard | case USB_MSG_DETACH:
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52 | bb36d470 | bellard | s->state = USB_STATE_NOTATTACHED; |
53 | bb36d470 | bellard | break;
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54 | bb36d470 | bellard | case USB_MSG_RESET:
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55 | bb36d470 | bellard | s->remote_wakeup = 0;
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56 | bb36d470 | bellard | s->addr = 0;
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57 | bb36d470 | bellard | s->state = USB_STATE_DEFAULT; |
58 | 059809e4 | bellard | s->handle_reset(s); |
59 | bb36d470 | bellard | break;
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60 | bb36d470 | bellard | case USB_TOKEN_SETUP:
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61 | 4d611c9a | pbrook | if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
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62 | bb36d470 | bellard | return USB_RET_NODEV;
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63 | bb36d470 | bellard | if (len != 8) |
64 | bb36d470 | bellard | goto fail;
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65 | bb36d470 | bellard | memcpy(s->setup_buf, data, 8);
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66 | bb36d470 | bellard | s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6]; |
67 | bb36d470 | bellard | s->setup_index = 0;
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68 | bb36d470 | bellard | if (s->setup_buf[0] & USB_DIR_IN) { |
69 | bb36d470 | bellard | ret = s->handle_control(s, |
70 | bb36d470 | bellard | (s->setup_buf[0] << 8) | s->setup_buf[1], |
71 | bb36d470 | bellard | (s->setup_buf[3] << 8) | s->setup_buf[2], |
72 | bb36d470 | bellard | (s->setup_buf[5] << 8) | s->setup_buf[4], |
73 | bb36d470 | bellard | s->setup_len, |
74 | bb36d470 | bellard | s->data_buf); |
75 | bb36d470 | bellard | if (ret < 0) |
76 | bb36d470 | bellard | return ret;
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77 | bb36d470 | bellard | if (ret < s->setup_len)
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78 | bb36d470 | bellard | s->setup_len = ret; |
79 | bb36d470 | bellard | s->setup_state = SETUP_STATE_DATA; |
80 | bb36d470 | bellard | } else {
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81 | bb36d470 | bellard | if (s->setup_len == 0) |
82 | bb36d470 | bellard | s->setup_state = SETUP_STATE_ACK; |
83 | bb36d470 | bellard | else
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84 | bb36d470 | bellard | s->setup_state = SETUP_STATE_DATA; |
85 | bb36d470 | bellard | } |
86 | bb36d470 | bellard | break;
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87 | bb36d470 | bellard | case USB_TOKEN_IN:
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88 | 4d611c9a | pbrook | if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
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89 | bb36d470 | bellard | return USB_RET_NODEV;
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90 | 4d611c9a | pbrook | switch(p->devep) {
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91 | bb36d470 | bellard | case 0: |
92 | bb36d470 | bellard | switch(s->setup_state) {
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93 | bb36d470 | bellard | case SETUP_STATE_ACK:
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94 | bb36d470 | bellard | if (!(s->setup_buf[0] & USB_DIR_IN)) { |
95 | 56bebe70 | bellard | s->setup_state = SETUP_STATE_IDLE; |
96 | bb36d470 | bellard | ret = s->handle_control(s, |
97 | bb36d470 | bellard | (s->setup_buf[0] << 8) | s->setup_buf[1], |
98 | bb36d470 | bellard | (s->setup_buf[3] << 8) | s->setup_buf[2], |
99 | bb36d470 | bellard | (s->setup_buf[5] << 8) | s->setup_buf[4], |
100 | bb36d470 | bellard | s->setup_len, |
101 | bb36d470 | bellard | s->data_buf); |
102 | bb36d470 | bellard | if (ret > 0) |
103 | bb36d470 | bellard | ret = 0;
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104 | bb36d470 | bellard | } else {
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105 | 56bebe70 | bellard | /* return 0 byte */
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106 | bb36d470 | bellard | } |
107 | bb36d470 | bellard | break;
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108 | bb36d470 | bellard | case SETUP_STATE_DATA:
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109 | bb36d470 | bellard | if (s->setup_buf[0] & USB_DIR_IN) { |
110 | bb36d470 | bellard | l = s->setup_len - s->setup_index; |
111 | bb36d470 | bellard | if (l > len)
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112 | bb36d470 | bellard | l = len; |
113 | bb36d470 | bellard | memcpy(data, s->data_buf + s->setup_index, l); |
114 | bb36d470 | bellard | s->setup_index += l; |
115 | bb36d470 | bellard | if (s->setup_index >= s->setup_len)
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116 | bb36d470 | bellard | s->setup_state = SETUP_STATE_ACK; |
117 | bb36d470 | bellard | ret = l; |
118 | bb36d470 | bellard | } else {
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119 | bb36d470 | bellard | s->setup_state = SETUP_STATE_IDLE; |
120 | bb36d470 | bellard | goto fail;
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121 | bb36d470 | bellard | } |
122 | bb36d470 | bellard | break;
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123 | bb36d470 | bellard | default:
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124 | bb36d470 | bellard | goto fail;
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125 | bb36d470 | bellard | } |
126 | bb36d470 | bellard | break;
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127 | bb36d470 | bellard | default:
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128 | 4d611c9a | pbrook | ret = s->handle_data(s, p); |
129 | bb36d470 | bellard | break;
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130 | bb36d470 | bellard | } |
131 | bb36d470 | bellard | break;
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132 | bb36d470 | bellard | case USB_TOKEN_OUT:
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133 | 4d611c9a | pbrook | if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
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134 | bb36d470 | bellard | return USB_RET_NODEV;
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135 | 4d611c9a | pbrook | switch(p->devep) {
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136 | bb36d470 | bellard | case 0: |
137 | bb36d470 | bellard | switch(s->setup_state) {
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138 | bb36d470 | bellard | case SETUP_STATE_ACK:
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139 | bb36d470 | bellard | if (s->setup_buf[0] & USB_DIR_IN) { |
140 | 56bebe70 | bellard | s->setup_state = SETUP_STATE_IDLE; |
141 | bb36d470 | bellard | /* transfer OK */
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142 | bb36d470 | bellard | } else {
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143 | 56bebe70 | bellard | /* ignore additionnal output */
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144 | bb36d470 | bellard | } |
145 | bb36d470 | bellard | break;
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146 | bb36d470 | bellard | case SETUP_STATE_DATA:
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147 | bb36d470 | bellard | if (!(s->setup_buf[0] & USB_DIR_IN)) { |
148 | bb36d470 | bellard | l = s->setup_len - s->setup_index; |
149 | bb36d470 | bellard | if (l > len)
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150 | bb36d470 | bellard | l = len; |
151 | bb36d470 | bellard | memcpy(s->data_buf + s->setup_index, data, l); |
152 | bb36d470 | bellard | s->setup_index += l; |
153 | bb36d470 | bellard | if (s->setup_index >= s->setup_len)
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154 | bb36d470 | bellard | s->setup_state = SETUP_STATE_ACK; |
155 | bb36d470 | bellard | ret = l; |
156 | bb36d470 | bellard | } else {
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157 | bb36d470 | bellard | s->setup_state = SETUP_STATE_IDLE; |
158 | bb36d470 | bellard | goto fail;
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159 | bb36d470 | bellard | } |
160 | bb36d470 | bellard | break;
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161 | bb36d470 | bellard | default:
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162 | bb36d470 | bellard | goto fail;
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163 | bb36d470 | bellard | } |
164 | bb36d470 | bellard | break;
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165 | bb36d470 | bellard | default:
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166 | 4d611c9a | pbrook | ret = s->handle_data(s, p); |
167 | bb36d470 | bellard | break;
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168 | bb36d470 | bellard | } |
169 | bb36d470 | bellard | break;
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170 | bb36d470 | bellard | default:
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171 | bb36d470 | bellard | fail:
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172 | bb36d470 | bellard | ret = USB_RET_STALL; |
173 | bb36d470 | bellard | break;
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174 | bb36d470 | bellard | } |
175 | bb36d470 | bellard | return ret;
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176 | bb36d470 | bellard | } |
177 | bb36d470 | bellard | |
178 | bb36d470 | bellard | /* XXX: fix overflow */
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179 | bb36d470 | bellard | int set_usb_string(uint8_t *buf, const char *str) |
180 | bb36d470 | bellard | { |
181 | bb36d470 | bellard | int len, i;
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182 | bb36d470 | bellard | uint8_t *q; |
183 | bb36d470 | bellard | |
184 | bb36d470 | bellard | q = buf; |
185 | bb36d470 | bellard | len = strlen(str); |
186 | ce5c37c2 | pbrook | *q++ = 2 * len + 2; |
187 | bb36d470 | bellard | *q++ = 3;
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188 | bb36d470 | bellard | for(i = 0; i < len; i++) { |
189 | bb36d470 | bellard | *q++ = str[i]; |
190 | bb36d470 | bellard | *q++ = 0;
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191 | bb36d470 | bellard | } |
192 | bb36d470 | bellard | return q - buf;
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193 | bb36d470 | bellard | } |
194 | 4d611c9a | pbrook | |
195 | 4d611c9a | pbrook | /* Send an internal message to a USB device. */
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196 | 4d611c9a | pbrook | void usb_send_msg(USBDevice *dev, int msg) |
197 | 4d611c9a | pbrook | { |
198 | 4d611c9a | pbrook | USBPacket p; |
199 | 4d611c9a | pbrook | memset(&p, 0, sizeof(p)); |
200 | 4d611c9a | pbrook | p.pid = msg; |
201 | 4d611c9a | pbrook | dev->handle_packet(dev, &p); |
202 | 4d611c9a | pbrook | } |