root / hw / usb.c @ ac791b88
History | View | Annotate | Download (10.9 kB)
1 | bb36d470 | bellard | /*
|
---|---|---|---|
2 | bb36d470 | bellard | * QEMU USB emulation
|
3 | bb36d470 | bellard | *
|
4 | bb36d470 | bellard | * Copyright (c) 2005 Fabrice Bellard
|
5 | 5fafdf24 | ths | *
|
6 | 89b9b79f | aliguori | * 2008 Generic packet handler rewrite by Max Krasnyansky
|
7 | 89b9b79f | aliguori | *
|
8 | bb36d470 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
|
9 | bb36d470 | bellard | * of this software and associated documentation files (the "Software"), to deal
|
10 | bb36d470 | bellard | * in the Software without restriction, including without limitation the rights
|
11 | bb36d470 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
12 | bb36d470 | bellard | * copies of the Software, and to permit persons to whom the Software is
|
13 | bb36d470 | bellard | * furnished to do so, subject to the following conditions:
|
14 | bb36d470 | bellard | *
|
15 | bb36d470 | bellard | * The above copyright notice and this permission notice shall be included in
|
16 | bb36d470 | bellard | * all copies or substantial portions of the Software.
|
17 | bb36d470 | bellard | *
|
18 | bb36d470 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
19 | bb36d470 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
20 | bb36d470 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
21 | bb36d470 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
22 | bb36d470 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
23 | bb36d470 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
24 | bb36d470 | bellard | * THE SOFTWARE.
|
25 | bb36d470 | bellard | */
|
26 | 87ecb68b | pbrook | #include "qemu-common.h" |
27 | 87ecb68b | pbrook | #include "usb.h" |
28 | 4f4321c1 | Gerd Hoffmann | #include "iov.h" |
29 | bb36d470 | bellard | |
30 | 891fb2cd | Gerd Hoffmann | void usb_attach(USBPort *port)
|
31 | bb36d470 | bellard | { |
32 | 891fb2cd | Gerd Hoffmann | USBDevice *dev = port->dev; |
33 | 891fb2cd | Gerd Hoffmann | |
34 | 891fb2cd | Gerd Hoffmann | assert(dev != NULL);
|
35 | 891fb2cd | Gerd Hoffmann | assert(dev->attached); |
36 | e0b8e72d | Gerd Hoffmann | assert(dev->state == USB_STATE_NOTATTACHED); |
37 | 891fb2cd | Gerd Hoffmann | port->ops->attach(port); |
38 | 891fb2cd | Gerd Hoffmann | usb_send_msg(dev, USB_MSG_ATTACH); |
39 | 891fb2cd | Gerd Hoffmann | } |
40 | 891fb2cd | Gerd Hoffmann | |
41 | 891fb2cd | Gerd Hoffmann | void usb_detach(USBPort *port)
|
42 | 891fb2cd | Gerd Hoffmann | { |
43 | 891fb2cd | Gerd Hoffmann | USBDevice *dev = port->dev; |
44 | 891fb2cd | Gerd Hoffmann | |
45 | 891fb2cd | Gerd Hoffmann | assert(dev != NULL);
|
46 | e0b8e72d | Gerd Hoffmann | assert(dev->state != USB_STATE_NOTATTACHED); |
47 | 891fb2cd | Gerd Hoffmann | port->ops->detach(port); |
48 | 891fb2cd | Gerd Hoffmann | usb_send_msg(dev, USB_MSG_DETACH); |
49 | bb36d470 | bellard | } |
50 | bb36d470 | bellard | |
51 | e0b8e72d | Gerd Hoffmann | void usb_reset(USBPort *port)
|
52 | e0b8e72d | Gerd Hoffmann | { |
53 | e0b8e72d | Gerd Hoffmann | USBDevice *dev = port->dev; |
54 | e0b8e72d | Gerd Hoffmann | |
55 | e0b8e72d | Gerd Hoffmann | assert(dev != NULL);
|
56 | e0b8e72d | Gerd Hoffmann | usb_detach(port); |
57 | e0b8e72d | Gerd Hoffmann | usb_attach(port); |
58 | e0b8e72d | Gerd Hoffmann | usb_send_msg(dev, USB_MSG_RESET); |
59 | e0b8e72d | Gerd Hoffmann | } |
60 | e0b8e72d | Gerd Hoffmann | |
61 | 01eacab6 | Gerd Hoffmann | void usb_wakeup(USBDevice *dev)
|
62 | 01eacab6 | Gerd Hoffmann | { |
63 | 01eacab6 | Gerd Hoffmann | if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
|
64 | d47e59b8 | Hans de Goede | dev->port->ops->wakeup(dev->port); |
65 | 01eacab6 | Gerd Hoffmann | } |
66 | 01eacab6 | Gerd Hoffmann | } |
67 | 01eacab6 | Gerd Hoffmann | |
68 | bb36d470 | bellard | /**********************/
|
69 | 89b9b79f | aliguori | |
70 | bb36d470 | bellard | /* generic USB device helpers (you are not forced to use them when
|
71 | bb36d470 | bellard | writing your USB device driver, but they help handling the
|
72 | 5fafdf24 | ths | protocol)
|
73 | bb36d470 | bellard | */
|
74 | bb36d470 | bellard | |
75 | 50b7963e | Hans de Goede | #define SETUP_STATE_IDLE 0 |
76 | 50b7963e | Hans de Goede | #define SETUP_STATE_SETUP 1 |
77 | 50b7963e | Hans de Goede | #define SETUP_STATE_DATA 2 |
78 | 50b7963e | Hans de Goede | #define SETUP_STATE_ACK 3 |
79 | bb36d470 | bellard | |
80 | 89b9b79f | aliguori | static int do_token_setup(USBDevice *s, USBPacket *p) |
81 | 89b9b79f | aliguori | { |
82 | 89b9b79f | aliguori | int request, value, index;
|
83 | 89b9b79f | aliguori | int ret = 0; |
84 | 89b9b79f | aliguori | |
85 | 4f4321c1 | Gerd Hoffmann | if (p->iov.size != 8) { |
86 | 89b9b79f | aliguori | return USB_RET_STALL;
|
87 | 4f4321c1 | Gerd Hoffmann | } |
88 | 4f4321c1 | Gerd Hoffmann | |
89 | 4f4321c1 | Gerd Hoffmann | usb_packet_copy(p, s->setup_buf, p->iov.size); |
90 | 89b9b79f | aliguori | s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6]; |
91 | 89b9b79f | aliguori | s->setup_index = 0;
|
92 | 89b9b79f | aliguori | |
93 | 89b9b79f | aliguori | request = (s->setup_buf[0] << 8) | s->setup_buf[1]; |
94 | 89b9b79f | aliguori | value = (s->setup_buf[3] << 8) | s->setup_buf[2]; |
95 | 89b9b79f | aliguori | index = (s->setup_buf[5] << 8) | s->setup_buf[4]; |
96 | 007fd62f | Hans de Goede | |
97 | 89b9b79f | aliguori | if (s->setup_buf[0] & USB_DIR_IN) { |
98 | 007fd62f | Hans de Goede | ret = s->info->handle_control(s, p, request, value, index, |
99 | 806b6024 | Gerd Hoffmann | s->setup_len, s->data_buf); |
100 | 50b7963e | Hans de Goede | if (ret == USB_RET_ASYNC) {
|
101 | 50b7963e | Hans de Goede | s->setup_state = SETUP_STATE_SETUP; |
102 | 50b7963e | Hans de Goede | return USB_RET_ASYNC;
|
103 | 50b7963e | Hans de Goede | } |
104 | 89b9b79f | aliguori | if (ret < 0) |
105 | 89b9b79f | aliguori | return ret;
|
106 | 89b9b79f | aliguori | |
107 | 89b9b79f | aliguori | if (ret < s->setup_len)
|
108 | 89b9b79f | aliguori | s->setup_len = ret; |
109 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_DATA; |
110 | 89b9b79f | aliguori | } else {
|
111 | 19f33223 | Hans de Goede | if (s->setup_len > sizeof(s->data_buf)) { |
112 | 19f33223 | Hans de Goede | fprintf(stderr, |
113 | 19f33223 | Hans de Goede | "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
|
114 | 19f33223 | Hans de Goede | s->setup_len, sizeof(s->data_buf));
|
115 | 19f33223 | Hans de Goede | return USB_RET_STALL;
|
116 | 19f33223 | Hans de Goede | } |
117 | 89b9b79f | aliguori | if (s->setup_len == 0) |
118 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_ACK; |
119 | 89b9b79f | aliguori | else
|
120 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_DATA; |
121 | 89b9b79f | aliguori | } |
122 | 89b9b79f | aliguori | |
123 | 89b9b79f | aliguori | return ret;
|
124 | 89b9b79f | aliguori | } |
125 | 89b9b79f | aliguori | |
126 | 89b9b79f | aliguori | static int do_token_in(USBDevice *s, USBPacket *p) |
127 | bb36d470 | bellard | { |
128 | 89b9b79f | aliguori | int request, value, index;
|
129 | 89b9b79f | aliguori | int ret = 0; |
130 | 89b9b79f | aliguori | |
131 | 89b9b79f | aliguori | if (p->devep != 0) |
132 | 806b6024 | Gerd Hoffmann | return s->info->handle_data(s, p);
|
133 | 89b9b79f | aliguori | |
134 | 89b9b79f | aliguori | request = (s->setup_buf[0] << 8) | s->setup_buf[1]; |
135 | 89b9b79f | aliguori | value = (s->setup_buf[3] << 8) | s->setup_buf[2]; |
136 | 89b9b79f | aliguori | index = (s->setup_buf[5] << 8) | s->setup_buf[4]; |
137 | 89b9b79f | aliguori | |
138 | 89b9b79f | aliguori | switch(s->setup_state) {
|
139 | 89b9b79f | aliguori | case SETUP_STATE_ACK:
|
140 | 89b9b79f | aliguori | if (!(s->setup_buf[0] & USB_DIR_IN)) { |
141 | 007fd62f | Hans de Goede | ret = s->info->handle_control(s, p, request, value, index, |
142 | 806b6024 | Gerd Hoffmann | s->setup_len, s->data_buf); |
143 | 007fd62f | Hans de Goede | if (ret == USB_RET_ASYNC) {
|
144 | 007fd62f | Hans de Goede | return USB_RET_ASYNC;
|
145 | 007fd62f | Hans de Goede | } |
146 | 007fd62f | Hans de Goede | s->setup_state = SETUP_STATE_IDLE; |
147 | 89b9b79f | aliguori | if (ret > 0) |
148 | 89b9b79f | aliguori | return 0; |
149 | 89b9b79f | aliguori | return ret;
|
150 | 89b9b79f | aliguori | } |
151 | 89b9b79f | aliguori | |
152 | 89b9b79f | aliguori | /* return 0 byte */
|
153 | 89b9b79f | aliguori | return 0; |
154 | 89b9b79f | aliguori | |
155 | 89b9b79f | aliguori | case SETUP_STATE_DATA:
|
156 | 89b9b79f | aliguori | if (s->setup_buf[0] & USB_DIR_IN) { |
157 | 89b9b79f | aliguori | int len = s->setup_len - s->setup_index;
|
158 | 4f4321c1 | Gerd Hoffmann | if (len > p->iov.size) {
|
159 | 4f4321c1 | Gerd Hoffmann | len = p->iov.size; |
160 | 4f4321c1 | Gerd Hoffmann | } |
161 | 4f4321c1 | Gerd Hoffmann | usb_packet_copy(p, s->data_buf + s->setup_index, len); |
162 | 89b9b79f | aliguori | s->setup_index += len; |
163 | 89b9b79f | aliguori | if (s->setup_index >= s->setup_len)
|
164 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_ACK; |
165 | 89b9b79f | aliguori | return len;
|
166 | 89b9b79f | aliguori | } |
167 | 89b9b79f | aliguori | |
168 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_IDLE; |
169 | 89b9b79f | aliguori | return USB_RET_STALL;
|
170 | 89b9b79f | aliguori | |
171 | 89b9b79f | aliguori | default:
|
172 | 89b9b79f | aliguori | return USB_RET_STALL;
|
173 | 89b9b79f | aliguori | } |
174 | 89b9b79f | aliguori | } |
175 | 89b9b79f | aliguori | |
176 | 89b9b79f | aliguori | static int do_token_out(USBDevice *s, USBPacket *p) |
177 | 89b9b79f | aliguori | { |
178 | 89b9b79f | aliguori | if (p->devep != 0) |
179 | 806b6024 | Gerd Hoffmann | return s->info->handle_data(s, p);
|
180 | 89b9b79f | aliguori | |
181 | 89b9b79f | aliguori | switch(s->setup_state) {
|
182 | 89b9b79f | aliguori | case SETUP_STATE_ACK:
|
183 | 89b9b79f | aliguori | if (s->setup_buf[0] & USB_DIR_IN) { |
184 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_IDLE; |
185 | 89b9b79f | aliguori | /* transfer OK */
|
186 | 89b9b79f | aliguori | } else {
|
187 | 89b9b79f | aliguori | /* ignore additional output */
|
188 | 89b9b79f | aliguori | } |
189 | 89b9b79f | aliguori | return 0; |
190 | 89b9b79f | aliguori | |
191 | 89b9b79f | aliguori | case SETUP_STATE_DATA:
|
192 | 89b9b79f | aliguori | if (!(s->setup_buf[0] & USB_DIR_IN)) { |
193 | 89b9b79f | aliguori | int len = s->setup_len - s->setup_index;
|
194 | 4f4321c1 | Gerd Hoffmann | if (len > p->iov.size) {
|
195 | 4f4321c1 | Gerd Hoffmann | len = p->iov.size; |
196 | 4f4321c1 | Gerd Hoffmann | } |
197 | 4f4321c1 | Gerd Hoffmann | usb_packet_copy(p, s->data_buf + s->setup_index, len); |
198 | 89b9b79f | aliguori | s->setup_index += len; |
199 | 89b9b79f | aliguori | if (s->setup_index >= s->setup_len)
|
200 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_ACK; |
201 | 89b9b79f | aliguori | return len;
|
202 | 89b9b79f | aliguori | } |
203 | 89b9b79f | aliguori | |
204 | 89b9b79f | aliguori | s->setup_state = SETUP_STATE_IDLE; |
205 | 89b9b79f | aliguori | return USB_RET_STALL;
|
206 | 89b9b79f | aliguori | |
207 | 89b9b79f | aliguori | default:
|
208 | 89b9b79f | aliguori | return USB_RET_STALL;
|
209 | 89b9b79f | aliguori | } |
210 | 89b9b79f | aliguori | } |
211 | bb36d470 | bellard | |
212 | 89b9b79f | aliguori | /*
|
213 | 89b9b79f | aliguori | * Generic packet handler.
|
214 | 89b9b79f | aliguori | * Called by the HC (host controller).
|
215 | 89b9b79f | aliguori | *
|
216 | 89b9b79f | aliguori | * Returns length of the transaction or one of the USB_RET_XXX codes.
|
217 | 89b9b79f | aliguori | */
|
218 | 89b9b79f | aliguori | int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
|
219 | 89b9b79f | aliguori | { |
220 | 4d611c9a | pbrook | switch(p->pid) {
|
221 | bb36d470 | bellard | case USB_MSG_ATTACH:
|
222 | bb36d470 | bellard | s->state = USB_STATE_ATTACHED; |
223 | b6f77fbe | Gerd Hoffmann | if (s->info->handle_attach) {
|
224 | b6f77fbe | Gerd Hoffmann | s->info->handle_attach(s); |
225 | b6f77fbe | Gerd Hoffmann | } |
226 | 89b9b79f | aliguori | return 0; |
227 | 89b9b79f | aliguori | |
228 | bb36d470 | bellard | case USB_MSG_DETACH:
|
229 | bb36d470 | bellard | s->state = USB_STATE_NOTATTACHED; |
230 | 89b9b79f | aliguori | return 0; |
231 | 89b9b79f | aliguori | |
232 | bb36d470 | bellard | case USB_MSG_RESET:
|
233 | bb36d470 | bellard | s->remote_wakeup = 0;
|
234 | bb36d470 | bellard | s->addr = 0;
|
235 | bb36d470 | bellard | s->state = USB_STATE_DEFAULT; |
236 | b6f77fbe | Gerd Hoffmann | if (s->info->handle_reset) {
|
237 | b6f77fbe | Gerd Hoffmann | s->info->handle_reset(s); |
238 | b6f77fbe | Gerd Hoffmann | } |
239 | 89b9b79f | aliguori | return 0; |
240 | 89b9b79f | aliguori | } |
241 | 89b9b79f | aliguori | |
242 | 89b9b79f | aliguori | /* Rest of the PIDs must match our address */
|
243 | 89b9b79f | aliguori | if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
|
244 | 89b9b79f | aliguori | return USB_RET_NODEV;
|
245 | 89b9b79f | aliguori | |
246 | 89b9b79f | aliguori | switch (p->pid) {
|
247 | bb36d470 | bellard | case USB_TOKEN_SETUP:
|
248 | 89b9b79f | aliguori | return do_token_setup(s, p);
|
249 | 89b9b79f | aliguori | |
250 | bb36d470 | bellard | case USB_TOKEN_IN:
|
251 | 89b9b79f | aliguori | return do_token_in(s, p);
|
252 | 89b9b79f | aliguori | |
253 | bb36d470 | bellard | case USB_TOKEN_OUT:
|
254 | 89b9b79f | aliguori | return do_token_out(s, p);
|
255 | 89b9b79f | aliguori | |
256 | bb36d470 | bellard | default:
|
257 | 89b9b79f | aliguori | return USB_RET_STALL;
|
258 | bb36d470 | bellard | } |
259 | bb36d470 | bellard | } |
260 | bb36d470 | bellard | |
261 | 50b7963e | Hans de Goede | /* ctrl complete function for devices which use usb_generic_handle_packet and
|
262 | 50b7963e | Hans de Goede | may return USB_RET_ASYNC from their handle_control callback. Device code
|
263 | 50b7963e | Hans de Goede | which does this *must* call this function instead of the normal
|
264 | 50b7963e | Hans de Goede | usb_packet_complete to complete their async control packets. */
|
265 | 50b7963e | Hans de Goede | void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
|
266 | 50b7963e | Hans de Goede | { |
267 | 4f4321c1 | Gerd Hoffmann | if (p->result < 0) { |
268 | 50b7963e | Hans de Goede | s->setup_state = SETUP_STATE_IDLE; |
269 | 50b7963e | Hans de Goede | } |
270 | 50b7963e | Hans de Goede | |
271 | 50b7963e | Hans de Goede | switch (s->setup_state) {
|
272 | 50b7963e | Hans de Goede | case SETUP_STATE_SETUP:
|
273 | 4f4321c1 | Gerd Hoffmann | if (p->result < s->setup_len) {
|
274 | 4f4321c1 | Gerd Hoffmann | s->setup_len = p->result; |
275 | 50b7963e | Hans de Goede | } |
276 | 50b7963e | Hans de Goede | s->setup_state = SETUP_STATE_DATA; |
277 | 4f4321c1 | Gerd Hoffmann | p->result = 8;
|
278 | 50b7963e | Hans de Goede | break;
|
279 | 50b7963e | Hans de Goede | |
280 | 50b7963e | Hans de Goede | case SETUP_STATE_ACK:
|
281 | 50b7963e | Hans de Goede | s->setup_state = SETUP_STATE_IDLE; |
282 | 4f4321c1 | Gerd Hoffmann | p->result = 0;
|
283 | 50b7963e | Hans de Goede | break;
|
284 | 50b7963e | Hans de Goede | |
285 | 50b7963e | Hans de Goede | default:
|
286 | 50b7963e | Hans de Goede | break;
|
287 | 50b7963e | Hans de Goede | } |
288 | 50b7963e | Hans de Goede | usb_packet_complete(s, p); |
289 | 50b7963e | Hans de Goede | } |
290 | 50b7963e | Hans de Goede | |
291 | bb36d470 | bellard | /* XXX: fix overflow */
|
292 | bb36d470 | bellard | int set_usb_string(uint8_t *buf, const char *str) |
293 | bb36d470 | bellard | { |
294 | bb36d470 | bellard | int len, i;
|
295 | bb36d470 | bellard | uint8_t *q; |
296 | bb36d470 | bellard | |
297 | bb36d470 | bellard | q = buf; |
298 | bb36d470 | bellard | len = strlen(str); |
299 | ce5c37c2 | pbrook | *q++ = 2 * len + 2; |
300 | bb36d470 | bellard | *q++ = 3;
|
301 | bb36d470 | bellard | for(i = 0; i < len; i++) { |
302 | bb36d470 | bellard | *q++ = str[i]; |
303 | bb36d470 | bellard | *q++ = 0;
|
304 | bb36d470 | bellard | } |
305 | bb36d470 | bellard | return q - buf;
|
306 | bb36d470 | bellard | } |
307 | 4d611c9a | pbrook | |
308 | 4d611c9a | pbrook | /* Send an internal message to a USB device. */
|
309 | 4d611c9a | pbrook | void usb_send_msg(USBDevice *dev, int msg) |
310 | 4d611c9a | pbrook | { |
311 | 4d611c9a | pbrook | USBPacket p; |
312 | 53aa8c0e | Gerd Hoffmann | int ret;
|
313 | 53aa8c0e | Gerd Hoffmann | |
314 | 4d611c9a | pbrook | memset(&p, 0, sizeof(p)); |
315 | 4d611c9a | pbrook | p.pid = msg; |
316 | 53aa8c0e | Gerd Hoffmann | ret = usb_handle_packet(dev, &p); |
317 | 89b9b79f | aliguori | /* This _must_ be synchronous */
|
318 | 53aa8c0e | Gerd Hoffmann | assert(ret != USB_RET_ASYNC); |
319 | 53aa8c0e | Gerd Hoffmann | } |
320 | 53aa8c0e | Gerd Hoffmann | |
321 | 53aa8c0e | Gerd Hoffmann | /* Hand over a packet to a device for processing. Return value
|
322 | 53aa8c0e | Gerd Hoffmann | USB_RET_ASYNC indicates the processing isn't finished yet, the
|
323 | 53aa8c0e | Gerd Hoffmann | driver will call usb_packet_complete() when done processing it. */
|
324 | 53aa8c0e | Gerd Hoffmann | int usb_handle_packet(USBDevice *dev, USBPacket *p)
|
325 | 53aa8c0e | Gerd Hoffmann | { |
326 | 53aa8c0e | Gerd Hoffmann | int ret;
|
327 | 53aa8c0e | Gerd Hoffmann | |
328 | 4ff658fb | Gerd Hoffmann | assert(p->owner == NULL);
|
329 | 53aa8c0e | Gerd Hoffmann | ret = dev->info->handle_packet(dev, p); |
330 | 4ff658fb | Gerd Hoffmann | if (ret == USB_RET_ASYNC) {
|
331 | 4ff658fb | Gerd Hoffmann | if (p->owner == NULL) { |
332 | 4ff658fb | Gerd Hoffmann | p->owner = dev; |
333 | 4ff658fb | Gerd Hoffmann | } else {
|
334 | 4ff658fb | Gerd Hoffmann | /* We'll end up here when usb_handle_packet is called
|
335 | 4ff658fb | Gerd Hoffmann | * recursively due to a hub being in the chain. Nothing
|
336 | 4ff658fb | Gerd Hoffmann | * to do. Leave p->owner pointing to the device, not the
|
337 | 4ff658fb | Gerd Hoffmann | * hub. */;
|
338 | 4ff658fb | Gerd Hoffmann | } |
339 | 4ff658fb | Gerd Hoffmann | } |
340 | 53aa8c0e | Gerd Hoffmann | return ret;
|
341 | 89b9b79f | aliguori | } |
342 | 4ff658fb | Gerd Hoffmann | |
343 | 4ff658fb | Gerd Hoffmann | /* Notify the controller that an async packet is complete. This should only
|
344 | 4ff658fb | Gerd Hoffmann | be called for packets previously deferred by returning USB_RET_ASYNC from
|
345 | 4ff658fb | Gerd Hoffmann | handle_packet. */
|
346 | 4ff658fb | Gerd Hoffmann | void usb_packet_complete(USBDevice *dev, USBPacket *p)
|
347 | 4ff658fb | Gerd Hoffmann | { |
348 | 4ff658fb | Gerd Hoffmann | /* Note: p->owner != dev is possible in case dev is a hub */
|
349 | 4ff658fb | Gerd Hoffmann | assert(p->owner != NULL);
|
350 | 4ff658fb | Gerd Hoffmann | p->owner = NULL;
|
351 | 4d8debba | Gerd Hoffmann | dev->port->ops->complete(dev->port, p); |
352 | 4ff658fb | Gerd Hoffmann | } |
353 | 4ff658fb | Gerd Hoffmann | |
354 | 4ff658fb | Gerd Hoffmann | /* Cancel an active packet. The packed must have been deferred by
|
355 | 4ff658fb | Gerd Hoffmann | returning USB_RET_ASYNC from handle_packet, and not yet
|
356 | 4ff658fb | Gerd Hoffmann | completed. */
|
357 | 4ff658fb | Gerd Hoffmann | void usb_cancel_packet(USBPacket * p)
|
358 | 4ff658fb | Gerd Hoffmann | { |
359 | 4ff658fb | Gerd Hoffmann | assert(p->owner != NULL);
|
360 | eb5e680a | Gerd Hoffmann | p->owner->info->cancel_packet(p->owner, p); |
361 | 4ff658fb | Gerd Hoffmann | p->owner = NULL;
|
362 | 4ff658fb | Gerd Hoffmann | } |
363 | 4f4321c1 | Gerd Hoffmann | |
364 | 4f4321c1 | Gerd Hoffmann | |
365 | 4f4321c1 | Gerd Hoffmann | void usb_packet_init(USBPacket *p)
|
366 | 4f4321c1 | Gerd Hoffmann | { |
367 | 4f4321c1 | Gerd Hoffmann | qemu_iovec_init(&p->iov, 1);
|
368 | 4f4321c1 | Gerd Hoffmann | } |
369 | 4f4321c1 | Gerd Hoffmann | |
370 | 4f4321c1 | Gerd Hoffmann | void usb_packet_setup(USBPacket *p, int pid, uint8_t addr, uint8_t ep) |
371 | 4f4321c1 | Gerd Hoffmann | { |
372 | 4f4321c1 | Gerd Hoffmann | p->pid = pid; |
373 | 4f4321c1 | Gerd Hoffmann | p->devaddr = addr; |
374 | 4f4321c1 | Gerd Hoffmann | p->devep = ep; |
375 | 4f4321c1 | Gerd Hoffmann | p->result = 0;
|
376 | 4f4321c1 | Gerd Hoffmann | qemu_iovec_reset(&p->iov); |
377 | 4f4321c1 | Gerd Hoffmann | } |
378 | 4f4321c1 | Gerd Hoffmann | |
379 | 4f4321c1 | Gerd Hoffmann | void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len) |
380 | 4f4321c1 | Gerd Hoffmann | { |
381 | 4f4321c1 | Gerd Hoffmann | qemu_iovec_add(&p->iov, ptr, len); |
382 | 4f4321c1 | Gerd Hoffmann | } |
383 | 4f4321c1 | Gerd Hoffmann | |
384 | 4f4321c1 | Gerd Hoffmann | void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes) |
385 | 4f4321c1 | Gerd Hoffmann | { |
386 | 4f4321c1 | Gerd Hoffmann | assert(p->result >= 0);
|
387 | 4f4321c1 | Gerd Hoffmann | assert(p->result + bytes <= p->iov.size); |
388 | 4f4321c1 | Gerd Hoffmann | switch (p->pid) {
|
389 | 4f4321c1 | Gerd Hoffmann | case USB_TOKEN_SETUP:
|
390 | 4f4321c1 | Gerd Hoffmann | case USB_TOKEN_OUT:
|
391 | 4f4321c1 | Gerd Hoffmann | iov_to_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes); |
392 | 4f4321c1 | Gerd Hoffmann | break;
|
393 | 4f4321c1 | Gerd Hoffmann | case USB_TOKEN_IN:
|
394 | 4f4321c1 | Gerd Hoffmann | iov_from_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes); |
395 | 4f4321c1 | Gerd Hoffmann | break;
|
396 | 4f4321c1 | Gerd Hoffmann | default:
|
397 | 4f4321c1 | Gerd Hoffmann | fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
|
398 | 4f4321c1 | Gerd Hoffmann | abort(); |
399 | 4f4321c1 | Gerd Hoffmann | } |
400 | 4f4321c1 | Gerd Hoffmann | p->result += bytes; |
401 | 4f4321c1 | Gerd Hoffmann | } |
402 | 4f4321c1 | Gerd Hoffmann | |
403 | 4f4321c1 | Gerd Hoffmann | void usb_packet_skip(USBPacket *p, size_t bytes)
|
404 | 4f4321c1 | Gerd Hoffmann | { |
405 | 4f4321c1 | Gerd Hoffmann | assert(p->result >= 0);
|
406 | 4f4321c1 | Gerd Hoffmann | assert(p->result + bytes <= p->iov.size); |
407 | 4f4321c1 | Gerd Hoffmann | if (p->pid == USB_TOKEN_IN) {
|
408 | 4f4321c1 | Gerd Hoffmann | iov_clear(p->iov.iov, p->iov.niov, p->result, bytes); |
409 | 4f4321c1 | Gerd Hoffmann | } |
410 | 4f4321c1 | Gerd Hoffmann | p->result += bytes; |
411 | 4f4321c1 | Gerd Hoffmann | } |
412 | 4f4321c1 | Gerd Hoffmann | |
413 | 4f4321c1 | Gerd Hoffmann | void usb_packet_cleanup(USBPacket *p)
|
414 | 4f4321c1 | Gerd Hoffmann | { |
415 | 4f4321c1 | Gerd Hoffmann | qemu_iovec_destroy(&p->iov); |
416 | 4f4321c1 | Gerd Hoffmann | } |