4 * Copyright (c) 2005 Fabrice Bellard
6 * 2008 Generic packet handler rewrite by Max Krasnyansky
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "qemu-common.h"
30 void usb_attach(USBPort *port)
32 USBDevice *dev = port->dev;
35 assert(dev->attached);
36 assert(dev->state == USB_STATE_NOTATTACHED);
37 port->ops->attach(port);
38 dev->state = USB_STATE_ATTACHED;
39 usb_device_handle_attach(dev);
42 void usb_detach(USBPort *port)
44 USBDevice *dev = port->dev;
47 assert(dev->state != USB_STATE_NOTATTACHED);
48 port->ops->detach(port);
49 dev->state = USB_STATE_NOTATTACHED;
52 void usb_port_reset(USBPort *port)
54 USBDevice *dev = port->dev;
59 usb_device_reset(dev);
62 void usb_device_reset(USBDevice *dev)
64 if (dev == NULL || !dev->attached) {
67 dev->remote_wakeup = 0;
69 dev->state = USB_STATE_DEFAULT;
70 usb_device_handle_reset(dev);
73 void usb_wakeup(USBDevice *dev)
75 if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
76 dev->port->ops->wakeup(dev->port);
80 /**********************/
82 /* generic USB device helpers (you are not forced to use them when
83 writing your USB device driver, but they help handling the
87 #define SETUP_STATE_IDLE 0
88 #define SETUP_STATE_SETUP 1
89 #define SETUP_STATE_DATA 2
90 #define SETUP_STATE_ACK 3
92 static int do_token_setup(USBDevice *s, USBPacket *p)
94 int request, value, index;
97 if (p->iov.size != 8) {
101 usb_packet_copy(p, s->setup_buf, p->iov.size);
102 s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
105 request = (s->setup_buf[0] << 8) | s->setup_buf[1];
106 value = (s->setup_buf[3] << 8) | s->setup_buf[2];
107 index = (s->setup_buf[5] << 8) | s->setup_buf[4];
109 if (s->setup_buf[0] & USB_DIR_IN) {
110 ret = usb_device_handle_control(s, p, request, value, index,
111 s->setup_len, s->data_buf);
112 if (ret == USB_RET_ASYNC) {
113 s->setup_state = SETUP_STATE_SETUP;
114 return USB_RET_ASYNC;
119 if (ret < s->setup_len)
121 s->setup_state = SETUP_STATE_DATA;
123 if (s->setup_len > sizeof(s->data_buf)) {
125 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
126 s->setup_len, sizeof(s->data_buf));
127 return USB_RET_STALL;
129 if (s->setup_len == 0)
130 s->setup_state = SETUP_STATE_ACK;
132 s->setup_state = SETUP_STATE_DATA;
138 static int do_token_in(USBDevice *s, USBPacket *p)
140 int request, value, index;
144 return usb_device_handle_data(s, p);
146 request = (s->setup_buf[0] << 8) | s->setup_buf[1];
147 value = (s->setup_buf[3] << 8) | s->setup_buf[2];
148 index = (s->setup_buf[5] << 8) | s->setup_buf[4];
150 switch(s->setup_state) {
151 case SETUP_STATE_ACK:
152 if (!(s->setup_buf[0] & USB_DIR_IN)) {
153 ret = usb_device_handle_control(s, p, request, value, index,
154 s->setup_len, s->data_buf);
155 if (ret == USB_RET_ASYNC) {
156 return USB_RET_ASYNC;
158 s->setup_state = SETUP_STATE_IDLE;
167 case SETUP_STATE_DATA:
168 if (s->setup_buf[0] & USB_DIR_IN) {
169 int len = s->setup_len - s->setup_index;
170 if (len > p->iov.size) {
173 usb_packet_copy(p, s->data_buf + s->setup_index, len);
174 s->setup_index += len;
175 if (s->setup_index >= s->setup_len)
176 s->setup_state = SETUP_STATE_ACK;
180 s->setup_state = SETUP_STATE_IDLE;
181 return USB_RET_STALL;
184 return USB_RET_STALL;
188 static int do_token_out(USBDevice *s, USBPacket *p)
191 return usb_device_handle_data(s, p);
193 switch(s->setup_state) {
194 case SETUP_STATE_ACK:
195 if (s->setup_buf[0] & USB_DIR_IN) {
196 s->setup_state = SETUP_STATE_IDLE;
199 /* ignore additional output */
203 case SETUP_STATE_DATA:
204 if (!(s->setup_buf[0] & USB_DIR_IN)) {
205 int len = s->setup_len - s->setup_index;
206 if (len > p->iov.size) {
209 usb_packet_copy(p, s->data_buf + s->setup_index, len);
210 s->setup_index += len;
211 if (s->setup_index >= s->setup_len)
212 s->setup_state = SETUP_STATE_ACK;
216 s->setup_state = SETUP_STATE_IDLE;
217 return USB_RET_STALL;
220 return USB_RET_STALL;
225 * Generic packet handler.
226 * Called by the HC (host controller).
228 * Returns length of the transaction or one of the USB_RET_XXX codes.
230 int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
232 /* Rest of the PIDs must match our address */
233 if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
234 return USB_RET_NODEV;
237 case USB_TOKEN_SETUP:
238 return do_token_setup(s, p);
241 return do_token_in(s, p);
244 return do_token_out(s, p);
247 return USB_RET_STALL;
251 /* ctrl complete function for devices which use usb_generic_handle_packet and
252 may return USB_RET_ASYNC from their handle_control callback. Device code
253 which does this *must* call this function instead of the normal
254 usb_packet_complete to complete their async control packets. */
255 void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
258 s->setup_state = SETUP_STATE_IDLE;
261 switch (s->setup_state) {
262 case SETUP_STATE_SETUP:
263 if (p->result < s->setup_len) {
264 s->setup_len = p->result;
266 s->setup_state = SETUP_STATE_DATA;
270 case SETUP_STATE_ACK:
271 s->setup_state = SETUP_STATE_IDLE;
278 usb_packet_complete(s, p);
281 /* XXX: fix overflow */
282 int set_usb_string(uint8_t *buf, const char *str)
291 for(i = 0; i < len; i++) {
298 USBDevice *usb_find_device(USBPort *port, uint8_t addr)
300 USBDevice *dev = port->dev;
302 if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) {
305 if (dev->addr == addr) {
308 return usb_device_find_device(dev, addr);
311 /* Hand over a packet to a device for processing. Return value
312 USB_RET_ASYNC indicates the processing isn't finished yet, the
313 driver will call usb_packet_complete() when done processing it. */
314 int usb_handle_packet(USBDevice *dev, USBPacket *p)
319 return USB_RET_NODEV;
322 assert(p->owner == NULL);
323 ret = usb_device_handle_packet(dev, p);
324 if (ret == USB_RET_ASYNC) {
325 if (p->owner == NULL) {
326 p->owner = usb_ep_get(dev, p->pid, p->devep);
328 /* We'll end up here when usb_handle_packet is called
329 * recursively due to a hub being in the chain. Nothing
330 * to do. Leave p->owner pointing to the device, not the
337 /* Notify the controller that an async packet is complete. This should only
338 be called for packets previously deferred by returning USB_RET_ASYNC from
340 void usb_packet_complete(USBDevice *dev, USBPacket *p)
342 /* Note: p->owner != dev is possible in case dev is a hub */
343 assert(p->owner != NULL);
345 dev->port->ops->complete(dev->port, p);
348 /* Cancel an active packet. The packed must have been deferred by
349 returning USB_RET_ASYNC from handle_packet, and not yet
351 void usb_cancel_packet(USBPacket * p)
353 assert(p->owner != NULL);
354 usb_device_cancel_packet(p->owner->dev, p);
359 void usb_packet_init(USBPacket *p)
361 qemu_iovec_init(&p->iov, 1);
364 void usb_packet_setup(USBPacket *p, int pid, uint8_t addr, uint8_t ep)
370 qemu_iovec_reset(&p->iov);
373 void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len)
375 qemu_iovec_add(&p->iov, ptr, len);
378 void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes)
380 assert(p->result >= 0);
381 assert(p->result + bytes <= p->iov.size);
383 case USB_TOKEN_SETUP:
385 iov_to_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes);
388 iov_from_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes);
391 fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
397 void usb_packet_skip(USBPacket *p, size_t bytes)
399 assert(p->result >= 0);
400 assert(p->result + bytes <= p->iov.size);
401 if (p->pid == USB_TOKEN_IN) {
402 iov_clear(p->iov.iov, p->iov.niov, p->result, bytes);
407 void usb_packet_cleanup(USBPacket *p)
409 qemu_iovec_destroy(&p->iov);
412 void usb_ep_init(USBDevice *dev)
416 dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL;
417 dev->ep_ctl.ifnum = 0;
418 dev->ep_ctl.dev = dev;
419 for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
420 dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID;
421 dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID;
422 dev->ep_in[ep].ifnum = 0;
423 dev->ep_out[ep].ifnum = 0;
424 dev->ep_in[ep].dev = dev;
425 dev->ep_out[ep].dev = dev;
429 void usb_ep_dump(USBDevice *dev)
431 static const char *tname[] = {
432 [USB_ENDPOINT_XFER_CONTROL] = "control",
433 [USB_ENDPOINT_XFER_ISOC] = "isoc",
434 [USB_ENDPOINT_XFER_BULK] = "bulk",
435 [USB_ENDPOINT_XFER_INT] = "int",
437 int ifnum, ep, first;
439 fprintf(stderr, "Device \"%s\", config %d\n",
440 dev->product_desc, dev->configuration);
441 for (ifnum = 0; ifnum < 16; ifnum++) {
443 for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
444 if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID &&
445 dev->ep_in[ep].ifnum == ifnum) {
448 fprintf(stderr, " Interface %d, alternative %d\n",
449 ifnum, dev->altsetting[ifnum]);
451 fprintf(stderr, " Endpoint %d, IN, %s, %d max\n", ep,
452 tname[dev->ep_in[ep].type],
453 dev->ep_in[ep].max_packet_size);
455 if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
456 dev->ep_out[ep].ifnum == ifnum) {
459 fprintf(stderr, " Interface %d, alternative %d\n",
460 ifnum, dev->altsetting[ifnum]);
462 fprintf(stderr, " Endpoint %d, OUT, %s, %d max\n", ep,
463 tname[dev->ep_out[ep].type],
464 dev->ep_out[ep].max_packet_size);
468 fprintf(stderr, "--\n");
471 struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep)
473 struct USBEndpoint *eps = pid == USB_TOKEN_IN ? dev->ep_in : dev->ep_out;
477 assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT);
478 assert(ep > 0 && ep <= USB_MAX_ENDPOINTS);
482 uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep)
484 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
488 void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type)
490 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
494 uint8_t usb_ep_get_ifnum(USBDevice *dev, int pid, int ep)
496 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
500 void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum)
502 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
506 void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
509 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
510 int size, microframes;
513 switch ((raw >> 11) & 3) {
524 uep->max_packet_size = size * microframes;
527 int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep)
529 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
530 return uep->max_packet_size;