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"
31 void usb_pick_speed(USBPort *port)
33 static const int speeds[] = {
39 USBDevice *udev = port->dev;
42 for (i = 0; i < ARRAY_SIZE(speeds); i++) {
43 if ((udev->speedmask & (1 << speeds[i])) &&
44 (port->speedmask & (1 << speeds[i]))) {
45 udev->speed = speeds[i];
51 void usb_attach(USBPort *port)
53 USBDevice *dev = port->dev;
56 assert(dev->attached);
57 assert(dev->state == USB_STATE_NOTATTACHED);
59 port->ops->attach(port);
60 dev->state = USB_STATE_ATTACHED;
61 usb_device_handle_attach(dev);
64 void usb_detach(USBPort *port)
66 USBDevice *dev = port->dev;
69 assert(dev->state != USB_STATE_NOTATTACHED);
70 port->ops->detach(port);
71 dev->state = USB_STATE_NOTATTACHED;
74 void usb_port_reset(USBPort *port)
76 USBDevice *dev = port->dev;
81 usb_device_reset(dev);
84 void usb_device_reset(USBDevice *dev)
86 if (dev == NULL || !dev->attached) {
89 dev->remote_wakeup = 0;
91 dev->state = USB_STATE_DEFAULT;
92 usb_device_handle_reset(dev);
95 void usb_wakeup(USBEndpoint *ep, unsigned int stream)
97 USBDevice *dev = ep->dev;
98 USBBus *bus = usb_bus_from_device(dev);
100 if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
101 dev->port->ops->wakeup(dev->port);
103 if (bus->ops->wakeup_endpoint) {
104 bus->ops->wakeup_endpoint(bus, ep, stream);
108 /**********************/
110 /* generic USB device helpers (you are not forced to use them when
111 writing your USB device driver, but they help handling the
115 #define SETUP_STATE_IDLE 0
116 #define SETUP_STATE_SETUP 1
117 #define SETUP_STATE_DATA 2
118 #define SETUP_STATE_ACK 3
119 #define SETUP_STATE_PARAM 4
121 static void do_token_setup(USBDevice *s, USBPacket *p)
123 int request, value, index;
125 if (p->iov.size != 8) {
126 p->status = USB_RET_STALL;
130 usb_packet_copy(p, s->setup_buf, p->iov.size);
131 p->actual_length = 0;
132 s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
135 request = (s->setup_buf[0] << 8) | s->setup_buf[1];
136 value = (s->setup_buf[3] << 8) | s->setup_buf[2];
137 index = (s->setup_buf[5] << 8) | s->setup_buf[4];
139 if (s->setup_buf[0] & USB_DIR_IN) {
140 usb_device_handle_control(s, p, request, value, index,
141 s->setup_len, s->data_buf);
142 if (p->status == USB_RET_ASYNC) {
143 s->setup_state = SETUP_STATE_SETUP;
145 if (p->status != USB_RET_SUCCESS) {
149 if (p->actual_length < s->setup_len) {
150 s->setup_len = p->actual_length;
152 s->setup_state = SETUP_STATE_DATA;
154 if (s->setup_len > sizeof(s->data_buf)) {
156 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
157 s->setup_len, sizeof(s->data_buf));
158 p->status = USB_RET_STALL;
161 if (s->setup_len == 0)
162 s->setup_state = SETUP_STATE_ACK;
164 s->setup_state = SETUP_STATE_DATA;
167 p->actual_length = 8;
170 static void do_token_in(USBDevice *s, USBPacket *p)
172 int request, value, index;
174 assert(p->ep->nr == 0);
176 request = (s->setup_buf[0] << 8) | s->setup_buf[1];
177 value = (s->setup_buf[3] << 8) | s->setup_buf[2];
178 index = (s->setup_buf[5] << 8) | s->setup_buf[4];
180 switch(s->setup_state) {
181 case SETUP_STATE_ACK:
182 if (!(s->setup_buf[0] & USB_DIR_IN)) {
183 usb_device_handle_control(s, p, request, value, index,
184 s->setup_len, s->data_buf);
185 if (p->status == USB_RET_ASYNC) {
188 s->setup_state = SETUP_STATE_IDLE;
189 p->actual_length = 0;
193 case SETUP_STATE_DATA:
194 if (s->setup_buf[0] & USB_DIR_IN) {
195 int len = s->setup_len - s->setup_index;
196 if (len > p->iov.size) {
199 usb_packet_copy(p, s->data_buf + s->setup_index, len);
200 s->setup_index += len;
201 if (s->setup_index >= s->setup_len) {
202 s->setup_state = SETUP_STATE_ACK;
206 s->setup_state = SETUP_STATE_IDLE;
207 p->status = USB_RET_STALL;
211 p->status = USB_RET_STALL;
215 static void do_token_out(USBDevice *s, USBPacket *p)
217 assert(p->ep->nr == 0);
219 switch(s->setup_state) {
220 case SETUP_STATE_ACK:
221 if (s->setup_buf[0] & USB_DIR_IN) {
222 s->setup_state = SETUP_STATE_IDLE;
225 /* ignore additional output */
229 case SETUP_STATE_DATA:
230 if (!(s->setup_buf[0] & USB_DIR_IN)) {
231 int len = s->setup_len - s->setup_index;
232 if (len > p->iov.size) {
235 usb_packet_copy(p, s->data_buf + s->setup_index, len);
236 s->setup_index += len;
237 if (s->setup_index >= s->setup_len) {
238 s->setup_state = SETUP_STATE_ACK;
242 s->setup_state = SETUP_STATE_IDLE;
243 p->status = USB_RET_STALL;
247 p->status = USB_RET_STALL;
251 static void do_parameter(USBDevice *s, USBPacket *p)
253 int i, request, value, index;
255 for (i = 0; i < 8; i++) {
256 s->setup_buf[i] = p->parameter >> (i*8);
259 s->setup_state = SETUP_STATE_PARAM;
260 s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
263 request = (s->setup_buf[0] << 8) | s->setup_buf[1];
264 value = (s->setup_buf[3] << 8) | s->setup_buf[2];
265 index = (s->setup_buf[5] << 8) | s->setup_buf[4];
267 if (s->setup_len > sizeof(s->data_buf)) {
269 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
270 s->setup_len, sizeof(s->data_buf));
271 p->status = USB_RET_STALL;
275 if (p->pid == USB_TOKEN_OUT) {
276 usb_packet_copy(p, s->data_buf, s->setup_len);
279 usb_device_handle_control(s, p, request, value, index,
280 s->setup_len, s->data_buf);
281 if (p->status == USB_RET_ASYNC) {
285 if (p->actual_length < s->setup_len) {
286 s->setup_len = p->actual_length;
288 if (p->pid == USB_TOKEN_IN) {
289 p->actual_length = 0;
290 usb_packet_copy(p, s->data_buf, s->setup_len);
294 /* ctrl complete function for devices which use usb_generic_handle_packet and
295 may return USB_RET_ASYNC from their handle_control callback. Device code
296 which does this *must* call this function instead of the normal
297 usb_packet_complete to complete their async control packets. */
298 void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
301 s->setup_state = SETUP_STATE_IDLE;
304 switch (s->setup_state) {
305 case SETUP_STATE_SETUP:
306 if (p->actual_length < s->setup_len) {
307 s->setup_len = p->actual_length;
309 s->setup_state = SETUP_STATE_DATA;
310 p->actual_length = 8;
313 case SETUP_STATE_ACK:
314 s->setup_state = SETUP_STATE_IDLE;
315 p->actual_length = 0;
318 case SETUP_STATE_PARAM:
319 if (p->actual_length < s->setup_len) {
320 s->setup_len = p->actual_length;
322 if (p->pid == USB_TOKEN_IN) {
323 p->actual_length = 0;
324 usb_packet_copy(p, s->data_buf, s->setup_len);
331 usb_packet_complete(s, p);
334 USBDevice *usb_find_device(USBPort *port, uint8_t addr)
336 USBDevice *dev = port->dev;
338 if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) {
341 if (dev->addr == addr) {
344 return usb_device_find_device(dev, addr);
347 static void usb_process_one(USBPacket *p)
349 USBDevice *dev = p->ep->dev;
352 * Handlers expect status to be initialized to USB_RET_SUCCESS, but it
353 * can be USB_RET_NAK here from a previous usb_process_one() call,
354 * or USB_RET_ASYNC from going through usb_queue_one().
356 p->status = USB_RET_SUCCESS;
358 if (p->ep->nr == 0) {
361 do_parameter(dev, p);
365 case USB_TOKEN_SETUP:
366 do_token_setup(dev, p);
372 do_token_out(dev, p);
375 p->status = USB_RET_STALL;
379 usb_device_handle_data(dev, p);
383 static void usb_queue_one(USBPacket *p)
385 usb_packet_set_state(p, USB_PACKET_QUEUED);
386 QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
387 p->status = USB_RET_ASYNC;
390 /* Hand over a packet to a device for processing. p->status ==
391 USB_RET_ASYNC indicates the processing isn't finished yet, the
392 driver will call usb_packet_complete() when done processing it. */
393 void usb_handle_packet(USBDevice *dev, USBPacket *p)
396 p->status = USB_RET_NODEV;
399 assert(dev == p->ep->dev);
400 assert(dev->state == USB_STATE_DEFAULT);
401 usb_packet_check_state(p, USB_PACKET_SETUP);
402 assert(p->ep != NULL);
404 /* Submitting a new packet clears halt */
406 assert(QTAILQ_EMPTY(&p->ep->queue));
407 p->ep->halted = false;
410 if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline || p->stream) {
412 if (p->status == USB_RET_ASYNC) {
413 /* hcd drivers cannot handle async for isoc */
414 assert(p->ep->type != USB_ENDPOINT_XFER_ISOC);
415 /* using async for interrupt packets breaks migration */
416 assert(p->ep->type != USB_ENDPOINT_XFER_INT ||
417 (dev->flags & (1 << USB_DEV_FLAG_IS_HOST)));
418 usb_packet_set_state(p, USB_PACKET_ASYNC);
419 QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
420 } else if (p->status == USB_RET_ADD_TO_QUEUE) {
424 * When pipelining is enabled usb-devices must always return async,
425 * otherwise packets can complete out of order!
427 assert(p->stream || !p->ep->pipeline ||
428 QTAILQ_EMPTY(&p->ep->queue));
429 if (p->status != USB_RET_NAK) {
430 usb_packet_set_state(p, USB_PACKET_COMPLETE);
438 void usb_packet_complete_one(USBDevice *dev, USBPacket *p)
440 USBEndpoint *ep = p->ep;
442 assert(p->stream || QTAILQ_FIRST(&ep->queue) == p);
443 assert(p->status != USB_RET_ASYNC && p->status != USB_RET_NAK);
445 if (p->status != USB_RET_SUCCESS ||
446 (p->short_not_ok && (p->actual_length < p->iov.size))) {
449 usb_packet_set_state(p, USB_PACKET_COMPLETE);
450 QTAILQ_REMOVE(&ep->queue, p, queue);
451 dev->port->ops->complete(dev->port, p);
454 /* Notify the controller that an async packet is complete. This should only
455 be called for packets previously deferred by returning USB_RET_ASYNC from
457 void usb_packet_complete(USBDevice *dev, USBPacket *p)
459 USBEndpoint *ep = p->ep;
461 usb_packet_check_state(p, USB_PACKET_ASYNC);
462 usb_packet_complete_one(dev, p);
464 while (!QTAILQ_EMPTY(&ep->queue)) {
465 p = QTAILQ_FIRST(&ep->queue);
467 /* Empty the queue on a halt */
468 p->status = USB_RET_REMOVE_FROM_QUEUE;
469 dev->port->ops->complete(dev->port, p);
472 if (p->state == USB_PACKET_ASYNC) {
475 usb_packet_check_state(p, USB_PACKET_QUEUED);
477 if (p->status == USB_RET_ASYNC) {
478 usb_packet_set_state(p, USB_PACKET_ASYNC);
481 usb_packet_complete_one(ep->dev, p);
485 /* Cancel an active packet. The packed must have been deferred by
486 returning USB_RET_ASYNC from handle_packet, and not yet
488 void usb_cancel_packet(USBPacket * p)
490 bool callback = (p->state == USB_PACKET_ASYNC);
491 assert(usb_packet_is_inflight(p));
492 usb_packet_set_state(p, USB_PACKET_CANCELED);
493 QTAILQ_REMOVE(&p->ep->queue, p, queue);
495 usb_device_cancel_packet(p->ep->dev, p);
500 void usb_packet_init(USBPacket *p)
502 qemu_iovec_init(&p->iov, 1);
505 static const char *usb_packet_state_name(USBPacketState state)
507 static const char *name[] = {
508 [USB_PACKET_UNDEFINED] = "undef",
509 [USB_PACKET_SETUP] = "setup",
510 [USB_PACKET_QUEUED] = "queued",
511 [USB_PACKET_ASYNC] = "async",
512 [USB_PACKET_COMPLETE] = "complete",
513 [USB_PACKET_CANCELED] = "canceled",
515 if (state < ARRAY_SIZE(name)) {
521 void usb_packet_check_state(USBPacket *p, USBPacketState expected)
526 if (p->state == expected) {
530 bus = usb_bus_from_device(dev);
531 trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p,
532 usb_packet_state_name(p->state),
533 usb_packet_state_name(expected));
534 assert(!"usb packet state check failed");
537 void usb_packet_set_state(USBPacket *p, USBPacketState state)
540 USBDevice *dev = p->ep->dev;
541 USBBus *bus = usb_bus_from_device(dev);
542 trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p,
543 usb_packet_state_name(p->state),
544 usb_packet_state_name(state));
546 trace_usb_packet_state_change(-1, "", -1, p,
547 usb_packet_state_name(p->state),
548 usb_packet_state_name(state));
553 void usb_packet_setup(USBPacket *p, int pid,
554 USBEndpoint *ep, unsigned int stream,
555 uint64_t id, bool short_not_ok, bool int_req)
557 assert(!usb_packet_is_inflight(p));
558 assert(p->iov.iov != NULL);
563 p->status = USB_RET_SUCCESS;
564 p->actual_length = 0;
566 p->short_not_ok = short_not_ok;
567 p->int_req = int_req;
569 qemu_iovec_reset(&p->iov);
570 usb_packet_set_state(p, USB_PACKET_SETUP);
573 void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len)
575 qemu_iovec_add(&p->iov, ptr, len);
578 void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes)
580 QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov;
582 assert(p->actual_length >= 0);
583 assert(p->actual_length + bytes <= iov->size);
585 case USB_TOKEN_SETUP:
587 iov_to_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes);
590 iov_from_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes);
593 fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
596 p->actual_length += bytes;
599 void usb_packet_skip(USBPacket *p, size_t bytes)
601 QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov;
603 assert(p->actual_length >= 0);
604 assert(p->actual_length + bytes <= iov->size);
605 if (p->pid == USB_TOKEN_IN) {
606 iov_memset(iov->iov, iov->niov, p->actual_length, 0, bytes);
608 p->actual_length += bytes;
611 size_t usb_packet_size(USBPacket *p)
613 return p->combined ? p->combined->iov.size : p->iov.size;
616 void usb_packet_cleanup(USBPacket *p)
618 assert(!usb_packet_is_inflight(p));
619 qemu_iovec_destroy(&p->iov);
622 void usb_ep_reset(USBDevice *dev)
627 dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL;
628 dev->ep_ctl.ifnum = 0;
629 dev->ep_ctl.max_packet_size = 64;
630 dev->ep_ctl.max_streams = 0;
631 dev->ep_ctl.dev = dev;
632 dev->ep_ctl.pipeline = false;
633 for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
634 dev->ep_in[ep].nr = ep + 1;
635 dev->ep_out[ep].nr = ep + 1;
636 dev->ep_in[ep].pid = USB_TOKEN_IN;
637 dev->ep_out[ep].pid = USB_TOKEN_OUT;
638 dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID;
639 dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID;
640 dev->ep_in[ep].ifnum = USB_INTERFACE_INVALID;
641 dev->ep_out[ep].ifnum = USB_INTERFACE_INVALID;
642 dev->ep_in[ep].max_packet_size = 0;
643 dev->ep_out[ep].max_packet_size = 0;
644 dev->ep_in[ep].max_streams = 0;
645 dev->ep_out[ep].max_streams = 0;
646 dev->ep_in[ep].dev = dev;
647 dev->ep_out[ep].dev = dev;
648 dev->ep_in[ep].pipeline = false;
649 dev->ep_out[ep].pipeline = false;
653 void usb_ep_init(USBDevice *dev)
658 QTAILQ_INIT(&dev->ep_ctl.queue);
659 for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
660 QTAILQ_INIT(&dev->ep_in[ep].queue);
661 QTAILQ_INIT(&dev->ep_out[ep].queue);
665 void usb_ep_dump(USBDevice *dev)
667 static const char *tname[] = {
668 [USB_ENDPOINT_XFER_CONTROL] = "control",
669 [USB_ENDPOINT_XFER_ISOC] = "isoc",
670 [USB_ENDPOINT_XFER_BULK] = "bulk",
671 [USB_ENDPOINT_XFER_INT] = "int",
673 int ifnum, ep, first;
675 fprintf(stderr, "Device \"%s\", config %d\n",
676 dev->product_desc, dev->configuration);
677 for (ifnum = 0; ifnum < 16; ifnum++) {
679 for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
680 if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID &&
681 dev->ep_in[ep].ifnum == ifnum) {
684 fprintf(stderr, " Interface %d, alternative %d\n",
685 ifnum, dev->altsetting[ifnum]);
687 fprintf(stderr, " Endpoint %d, IN, %s, %d max\n", ep,
688 tname[dev->ep_in[ep].type],
689 dev->ep_in[ep].max_packet_size);
691 if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
692 dev->ep_out[ep].ifnum == ifnum) {
695 fprintf(stderr, " Interface %d, alternative %d\n",
696 ifnum, dev->altsetting[ifnum]);
698 fprintf(stderr, " Endpoint %d, OUT, %s, %d max\n", ep,
699 tname[dev->ep_out[ep].type],
700 dev->ep_out[ep].max_packet_size);
704 fprintf(stderr, "--\n");
707 struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep)
709 struct USBEndpoint *eps;
714 eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out;
718 assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT);
719 assert(ep > 0 && ep <= USB_MAX_ENDPOINTS);
723 uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep)
725 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
729 void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type)
731 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
735 void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum)
737 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
741 void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
744 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
745 int size, microframes;
748 switch ((raw >> 11) & 3) {
759 uep->max_packet_size = size * microframes;
762 void usb_ep_set_max_streams(USBDevice *dev, int pid, int ep, uint8_t raw)
764 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
767 MaxStreams = raw & 0x1f;
769 uep->max_streams = 1 << MaxStreams;
771 uep->max_streams = 0;
775 void usb_ep_set_halted(USBDevice *dev, int pid, int ep, bool halted)
777 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
778 uep->halted = halted;
781 USBPacket *usb_ep_find_packet_by_id(USBDevice *dev, int pid, int ep,
784 struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
787 QTAILQ_FOREACH(p, &uep->queue, queue) {