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qemu-config: comment spell fix
[qemu.git] / usb-linux.c
blobbaa6574ef5b5fd0c32db1deb9591e256ab81288d
1 /*
2 * Linux host USB redirector
3 *
4 * Copyright (c) 2005 Fabrice Bellard
5 *
6 * Copyright (c) 2008 Max Krasnyansky
7 * Support for host device auto connect & disconnect
8 * Major rewrite to support fully async operation
9 *
10 * Copyright 2008 TJ <linux@tjworld.net>
11 * Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
12 * to the legacy /proc/bus/usb USB device discovery and handling
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 * THE SOFTWARE.
31 */
32
33 #include "qemu-common.h"
34 #include "qemu-timer.h"
35 #include "monitor.h"
36 #include "sysemu.h"
37
38 #include <dirent.h>
39 #include <sys/ioctl.h>
40 #include <signal.h>
41
42 #include <linux/usbdevice_fs.h>
43 #include <linux/version.h>
44 #include "hw/usb.h"
45
46 /* We redefine it to avoid version problems */
47 struct usb_ctrltransfer {
48 uint8_t bRequestType;
49 uint8_t bRequest;
50 uint16_t wValue;
51 uint16_t wIndex;
52 uint16_t wLength;
53 uint32_t timeout;
54 void *data;
55 };
56
57 typedef int USBScanFunc(void *opaque, int bus_num, int addr, char *port,
58 int class_id, int vendor_id, int product_id,
59 const char *product_name, int speed);
60
61 //#define DEBUG
62
63 #ifdef DEBUG
64 #define DPRINTF printf
65 #else
66 #define DPRINTF(...)
67 #endif
68
69 #define USBDBG_DEVOPENED "husb: opened %s/devices\n"
70
71 #define USBPROCBUS_PATH "/proc/bus/usb"
72 #define PRODUCT_NAME_SZ 32
73 #define MAX_ENDPOINTS 15
74 #define MAX_PORTLEN 16
75 #define USBDEVBUS_PATH "/dev/bus/usb"
76 #define USBSYSBUS_PATH "/sys/bus/usb"
77
78 static char *usb_host_device_path;
79
80 #define USB_FS_NONE 0
81 #define USB_FS_PROC 1
82 #define USB_FS_DEV 2
83 #define USB_FS_SYS 3
84
85 static int usb_fs_type;
86
87 /* endpoint association data */
88 #define ISO_FRAME_DESC_PER_URB 32
89 #define ISO_URB_COUNT 3
90 #define INVALID_EP_TYPE 255
91
92 /* devio.c limits single requests to 16k */
93 #define MAX_USBFS_BUFFER_SIZE 16384
94
95 typedef struct AsyncURB AsyncURB;
96
97 struct endp_data {
98 uint8_t type;
99 uint8_t halted;
100 uint8_t iso_started;
101 AsyncURB *iso_urb;
102 int iso_urb_idx;
103 int iso_buffer_used;
104 int max_packet_size;
105 };
106
107 struct USBAutoFilter {
108 uint32_t bus_num;
109 uint32_t addr;
110 char *port;
111 uint32_t vendor_id;
112 uint32_t product_id;
113 };
114
115 typedef struct USBHostDevice {
116 USBDevice dev;
117 int fd;
118
119 uint8_t descr[1024];
120 int descr_len;
121 int configuration;
122 int ninterfaces;
123 int closing;
124 Notifier exit;
125
126 struct endp_data endp_table[MAX_ENDPOINTS];
127 QLIST_HEAD(, AsyncURB) aurbs;
128
129 /* Host side address */
130 int bus_num;
131 int addr;
132 char port[MAX_PORTLEN];
133 struct USBAutoFilter match;
134
135 QTAILQ_ENTRY(USBHostDevice) next;
136 } USBHostDevice;
137
138 static QTAILQ_HEAD(, USBHostDevice) hostdevs = QTAILQ_HEAD_INITIALIZER(hostdevs);
139
140 static int usb_host_close(USBHostDevice *dev);
141 static int parse_filter(const char *spec, struct USBAutoFilter *f);
142 static void usb_host_auto_check(void *unused);
143 static int usb_host_read_file(char *line, size_t line_size,
144 const char *device_file, const char *device_name);
145
146 static int is_isoc(USBHostDevice *s, int ep)
147 {
148 return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
149 }
150
151 static int is_valid(USBHostDevice *s, int ep)
152 {
153 return s->endp_table[ep - 1].type != INVALID_EP_TYPE;
154 }
155
156 static int is_halted(USBHostDevice *s, int ep)
157 {
158 return s->endp_table[ep - 1].halted;
159 }
160
161 static void clear_halt(USBHostDevice *s, int ep)
162 {
163 s->endp_table[ep - 1].halted = 0;
164 }
165
166 static void set_halt(USBHostDevice *s, int ep)
167 {
168 s->endp_table[ep - 1].halted = 1;
169 }
170
171 static int is_iso_started(USBHostDevice *s, int ep)
172 {
173 return s->endp_table[ep - 1].iso_started;
174 }
175
176 static void clear_iso_started(USBHostDevice *s, int ep)
177 {
178 s->endp_table[ep - 1].iso_started = 0;
179 }
180
181 static void set_iso_started(USBHostDevice *s, int ep)
182 {
183 s->endp_table[ep - 1].iso_started = 1;
184 }
185
186 static void set_iso_urb(USBHostDevice *s, int ep, AsyncURB *iso_urb)
187 {
188 s->endp_table[ep - 1].iso_urb = iso_urb;
189 }
190
191 static AsyncURB *get_iso_urb(USBHostDevice *s, int ep)
192 {
193 return s->endp_table[ep - 1].iso_urb;
194 }
195
196 static void set_iso_urb_idx(USBHostDevice *s, int ep, int i)
197 {
198 s->endp_table[ep - 1].iso_urb_idx = i;
199 }
200
201 static int get_iso_urb_idx(USBHostDevice *s, int ep)
202 {
203 return s->endp_table[ep - 1].iso_urb_idx;
204 }
205
206 static void set_iso_buffer_used(USBHostDevice *s, int ep, int i)
207 {
208 s->endp_table[ep - 1].iso_buffer_used = i;
209 }
210
211 static int get_iso_buffer_used(USBHostDevice *s, int ep)
212 {
213 return s->endp_table[ep - 1].iso_buffer_used;
214 }
215
216 static void set_max_packet_size(USBHostDevice *s, int ep, uint8_t *descriptor)
217 {
218 int raw = descriptor[4] + (descriptor[5] << 8);
219 int size, microframes;
220
221 size = raw & 0x7ff;
222 switch ((raw >> 11) & 3) {
223 case 1: microframes = 2; break;
224 case 2: microframes = 3; break;
225 default: microframes = 1; break;
226 }
227 DPRINTF("husb: max packet size: 0x%x -> %d x %d\n",
228 raw, microframes, size);
229 s->endp_table[ep - 1].max_packet_size = size * microframes;
230 }
231
232 static int get_max_packet_size(USBHostDevice *s, int ep)
233 {
234 return s->endp_table[ep - 1].max_packet_size;
235 }
236
237 /*
238 * Async URB state.
239 * We always allocate iso packet descriptors even for bulk transfers
240 * to simplify allocation and casts.
241 */
242 struct AsyncURB
243 {
244 struct usbdevfs_urb urb;
245 struct usbdevfs_iso_packet_desc isocpd[ISO_FRAME_DESC_PER_URB];
246 USBHostDevice *hdev;
247 QLIST_ENTRY(AsyncURB) next;
248
249 /* For regular async urbs */
250 USBPacket *packet;
251 int more; /* large transfer, more urbs follow */
252
253 /* For buffered iso handling */
254 int iso_frame_idx; /* -1 means in flight */
255 };
256
257 static AsyncURB *async_alloc(USBHostDevice *s)
258 {
259 AsyncURB *aurb = qemu_mallocz(sizeof(AsyncURB));
260 aurb->hdev = s;
261 QLIST_INSERT_HEAD(&s->aurbs, aurb, next);
262 return aurb;
263 }
264
265 static void async_free(AsyncURB *aurb)
266 {
267 QLIST_REMOVE(aurb, next);
268 qemu_free(aurb);
269 }
270
271 static void async_complete(void *opaque)
272 {
273 USBHostDevice *s = opaque;
274 AsyncURB *aurb;
275
276 while (1) {
277 USBPacket *p;
278
279 int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
280 if (r < 0) {
281 if (errno == EAGAIN) {
282 return;
283 }
284 if (errno == ENODEV && !s->closing) {
285 printf("husb: device %d.%d disconnected\n",
286 s->bus_num, s->addr);
287 usb_host_close(s);
288 usb_host_auto_check(NULL);
289 return;
290 }
291
292 DPRINTF("husb: async. reap urb failed errno %d\n", errno);
293 return;
294 }
295
296 DPRINTF("husb: async completed. aurb %p status %d alen %d\n",
297 aurb, aurb->urb.status, aurb->urb.actual_length);
298
299 /* If this is a buffered iso urb mark it as complete and don't do
300 anything else (it is handled further in usb_host_handle_iso_data) */
301 if (aurb->iso_frame_idx == -1) {
302 if (aurb->urb.status == -EPIPE) {
303 set_halt(s, aurb->urb.endpoint & 0xf);
304 }
305 aurb->iso_frame_idx = 0;
306 continue;
307 }
308
309 p = aurb->packet;
310
311 if (p) {
312 switch (aurb->urb.status) {
313 case 0:
314 p->len += aurb->urb.actual_length;
315 break;
316
317 case -EPIPE:
318 set_halt(s, p->devep);
319 p->len = USB_RET_STALL;
320 break;
321
322 default:
323 p->len = USB_RET_NAK;
324 break;
325 }
326
327 if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL) {
328 usb_generic_async_ctrl_complete(&s->dev, p);
329 } else if (!aurb->more) {
330 usb_packet_complete(&s->dev, p);
331 }
332 }
333
334 async_free(aurb);
335 }
336 }
337
338 static void usb_host_async_cancel(USBDevice *dev, USBPacket *p)
339 {
340 USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
341 AsyncURB *aurb;
342
343 QLIST_FOREACH(aurb, &s->aurbs, next) {
344 if (p != aurb->packet) {
345 continue;
346 }
347
348 DPRINTF("husb: async cancel: packet %p, aurb %p\n", p, aurb);
349
350 /* Mark it as dead (see async_complete above) */
351 aurb->packet = NULL;
352
353 int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
354 if (r < 0) {
355 DPRINTF("husb: async. discard urb failed errno %d\n", errno);
356 }
357 }
358 }
359
360 static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
361 {
362 int dev_descr_len, config_descr_len;
363 int interface, nb_interfaces;
364 int ret, i;
365
366 if (configuration == 0) /* address state - ignore */
367 return 1;
368
369 DPRINTF("husb: claiming interfaces. config %d\n", configuration);
370
371 i = 0;
372 dev_descr_len = dev->descr[0];
373 if (dev_descr_len > dev->descr_len) {
374 goto fail;
375 }
376
377 i += dev_descr_len;
378 while (i < dev->descr_len) {
379 DPRINTF("husb: i is %d, descr_len is %d, dl %d, dt %d\n",
380 i, dev->descr_len,
381 dev->descr[i], dev->descr[i+1]);
382
383 if (dev->descr[i+1] != USB_DT_CONFIG) {
384 i += dev->descr[i];
385 continue;
386 }
387 config_descr_len = dev->descr[i];
388
389 printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
390
391 if (configuration < 0 || configuration == dev->descr[i + 5]) {
392 configuration = dev->descr[i + 5];
393 break;
394 }
395
396 i += config_descr_len;
397 }
398
399 if (i >= dev->descr_len) {
400 fprintf(stderr,
401 "husb: update iface failed. no matching configuration\n");
402 goto fail;
403 }
404 nb_interfaces = dev->descr[i + 4];
405
406 #ifdef USBDEVFS_DISCONNECT
407 /* earlier Linux 2.4 do not support that */
408 {
409 struct usbdevfs_ioctl ctrl;
410 for (interface = 0; interface < nb_interfaces; interface++) {
411 ctrl.ioctl_code = USBDEVFS_DISCONNECT;
412 ctrl.ifno = interface;
413 ctrl.data = 0;
414 ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
415 if (ret < 0 && errno != ENODATA) {
416 perror("USBDEVFS_DISCONNECT");
417 goto fail;
418 }
419 }
420 }
421 #endif
422
423 /* XXX: only grab if all interfaces are free */
424 for (interface = 0; interface < nb_interfaces; interface++) {
425 ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
426 if (ret < 0) {
427 if (errno == EBUSY) {
428 printf("husb: update iface. device already grabbed\n");
429 } else {
430 perror("husb: failed to claim interface");
431 }
432 fail:
433 return 0;
434 }
435 }
436
437 printf("husb: %d interfaces claimed for configuration %d\n",
438 nb_interfaces, configuration);
439
440 dev->ninterfaces = nb_interfaces;
441 dev->configuration = configuration;
442 return 1;
443 }
444
445 static int usb_host_release_interfaces(USBHostDevice *s)
446 {
447 int ret, i;
448
449 DPRINTF("husb: releasing interfaces\n");
450
451 for (i = 0; i < s->ninterfaces; i++) {
452 ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
453 if (ret < 0) {
454 perror("husb: failed to release interface");
455 return 0;
456 }
457 }
458
459 return 1;
460 }
461
462 static void usb_host_handle_reset(USBDevice *dev)
463 {
464 USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
465
466 DPRINTF("husb: reset device %u.%u\n", s->bus_num, s->addr);
467
468 ioctl(s->fd, USBDEVFS_RESET);
469
470 usb_host_claim_interfaces(s, s->configuration);
471 }
472
473 static void usb_host_handle_destroy(USBDevice *dev)
474 {
475 USBHostDevice *s = (USBHostDevice *)dev;
476
477 usb_host_close(s);
478 QTAILQ_REMOVE(&hostdevs, s, next);
479 qemu_remove_exit_notifier(&s->exit);
480 }
481
482 static int usb_linux_update_endp_table(USBHostDevice *s);
483
484 /* iso data is special, we need to keep enough urbs in flight to make sure
485 that the controller never runs out of them, otherwise the device will
486 likely suffer a buffer underrun / overrun. */
487 static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, uint8_t ep, int in)
488 {
489 AsyncURB *aurb;
490 int i, j, len = get_max_packet_size(s, ep);
491
492 aurb = qemu_mallocz(ISO_URB_COUNT * sizeof(*aurb));
493 for (i = 0; i < ISO_URB_COUNT; i++) {
494 aurb[i].urb.endpoint = ep;
495 aurb[i].urb.buffer_length = ISO_FRAME_DESC_PER_URB * len;
496 aurb[i].urb.buffer = qemu_malloc(aurb[i].urb.buffer_length);
497 aurb[i].urb.type = USBDEVFS_URB_TYPE_ISO;
498 aurb[i].urb.flags = USBDEVFS_URB_ISO_ASAP;
499 aurb[i].urb.number_of_packets = ISO_FRAME_DESC_PER_URB;
500 for (j = 0 ; j < ISO_FRAME_DESC_PER_URB; j++)
501 aurb[i].urb.iso_frame_desc[j].length = len;
502 if (in) {
503 aurb[i].urb.endpoint |= 0x80;
504 /* Mark as fully consumed (idle) */
505 aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB;
506 }
507 }
508 set_iso_urb(s, ep, aurb);
509
510 return aurb;
511 }
512
513 static void usb_host_stop_n_free_iso(USBHostDevice *s, uint8_t ep)
514 {
515 AsyncURB *aurb;
516 int i, ret, killed = 0, free = 1;
517
518 aurb = get_iso_urb(s, ep);
519 if (!aurb) {
520 return;
521 }
522
523 for (i = 0; i < ISO_URB_COUNT; i++) {
524 /* in flight? */
525 if (aurb[i].iso_frame_idx == -1) {
526 ret = ioctl(s->fd, USBDEVFS_DISCARDURB, &aurb[i]);
527 if (ret < 0) {
528 printf("husb: discard isoc in urb failed errno %d\n", errno);
529 free = 0;
530 continue;
531 }
532 killed++;
533 }
534 }
535
536 /* Make sure any urbs we've killed are reaped before we free them */
537 if (killed) {
538 async_complete(s);
539 }
540
541 for (i = 0; i < ISO_URB_COUNT; i++) {
542 qemu_free(aurb[i].urb.buffer);
543 }
544
545 if (free)
546 qemu_free(aurb);
547 else
548 printf("husb: leaking iso urbs because of discard failure\n");
549 set_iso_urb(s, ep, NULL);
550 set_iso_urb_idx(s, ep, 0);
551 clear_iso_started(s, ep);
552 }
553
554 static int urb_status_to_usb_ret(int status)
555 {
556 switch (status) {
557 case -EPIPE:
558 return USB_RET_STALL;
559 default:
560 return USB_RET_NAK;
561 }
562 }
563
564 static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
565 {
566 AsyncURB *aurb;
567 int i, j, ret, max_packet_size, offset, len = 0;
568
569 max_packet_size = get_max_packet_size(s, p->devep);
570 if (max_packet_size == 0)
571 return USB_RET_NAK;
572
573 aurb = get_iso_urb(s, p->devep);
574 if (!aurb) {
575 aurb = usb_host_alloc_iso(s, p->devep, in);
576 }
577
578 i = get_iso_urb_idx(s, p->devep);
579 j = aurb[i].iso_frame_idx;
580 if (j >= 0 && j < ISO_FRAME_DESC_PER_URB) {
581 if (in) {
582 /* Check urb status */
583 if (aurb[i].urb.status) {
584 len = urb_status_to_usb_ret(aurb[i].urb.status);
585 /* Move to the next urb */
586 aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB - 1;
587 /* Check frame status */
588 } else if (aurb[i].urb.iso_frame_desc[j].status) {
589 len = urb_status_to_usb_ret(
590 aurb[i].urb.iso_frame_desc[j].status);
591 /* Check the frame fits */
592 } else if (aurb[i].urb.iso_frame_desc[j].actual_length > p->len) {
593 printf("husb: received iso data is larger then packet\n");
594 len = USB_RET_NAK;
595 /* All good copy data over */
596 } else {
597 len = aurb[i].urb.iso_frame_desc[j].actual_length;
598 memcpy(p->data,
599 aurb[i].urb.buffer +
600 j * aurb[i].urb.iso_frame_desc[0].length,
601 len);
602 }
603 } else {
604 len = p->len;
605 offset = (j == 0) ? 0 : get_iso_buffer_used(s, p->devep);
606
607 /* Check the frame fits */
608 if (len > max_packet_size) {
609 printf("husb: send iso data is larger then max packet size\n");
610 return USB_RET_NAK;
611 }
612
613 /* All good copy data over */
614 memcpy(aurb[i].urb.buffer + offset, p->data, len);
615 aurb[i].urb.iso_frame_desc[j].length = len;
616 offset += len;
617 set_iso_buffer_used(s, p->devep, offset);
618
619 /* Start the stream once we have buffered enough data */
620 if (!is_iso_started(s, p->devep) && i == 1 && j == 8) {
621 set_iso_started(s, p->devep);
622 }
623 }
624 aurb[i].iso_frame_idx++;
625 if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
626 i = (i + 1) % ISO_URB_COUNT;
627 set_iso_urb_idx(s, p->devep, i);
628 }
629 } else {
630 if (in) {
631 set_iso_started(s, p->devep);
632 } else {
633 DPRINTF("hubs: iso out error no free buffer, dropping packet\n");
634 }
635 }
636
637 if (is_iso_started(s, p->devep)) {
638 /* (Re)-submit all fully consumed / filled urbs */
639 for (i = 0; i < ISO_URB_COUNT; i++) {
640 if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
641 ret = ioctl(s->fd, USBDEVFS_SUBMITURB, &aurb[i]);
642 if (ret < 0) {
643 printf("husb error submitting iso urb %d: %d\n", i, errno);
644 if (!in || len == 0) {
645 switch(errno) {
646 case ETIMEDOUT:
647 len = USB_RET_NAK;
648 break;
649 case EPIPE:
650 default:
651 len = USB_RET_STALL;
652 }
653 }
654 break;
655 }
656 aurb[i].iso_frame_idx = -1;
657 }
658 }
659 }
660
661 return len;
662 }
663
664 static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
665 {
666 USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
667 struct usbdevfs_urb *urb;
668 AsyncURB *aurb;
669 int ret, rem;
670 uint8_t *pbuf;
671 uint8_t ep;
672
673 if (!is_valid(s, p->devep)) {
674 return USB_RET_NAK;
675 }
676
677 if (p->pid == USB_TOKEN_IN) {
678 ep = p->devep | 0x80;
679 } else {
680 ep = p->devep;
681 }
682
683 if (is_halted(s, p->devep)) {
684 ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &ep);
685 if (ret < 0) {
686 DPRINTF("husb: failed to clear halt. ep 0x%x errno %d\n",
687 ep, errno);
688 return USB_RET_NAK;
689 }
690 clear_halt(s, p->devep);
691 }
692
693 if (is_isoc(s, p->devep)) {
694 return usb_host_handle_iso_data(s, p, p->pid == USB_TOKEN_IN);
695 }
696
697 rem = p->len;
698 pbuf = p->data;
699 p->len = 0;
700 while (rem) {
701 aurb = async_alloc(s);
702 aurb->packet = p;
703
704 urb = &aurb->urb;
705 urb->endpoint = ep;
706 urb->type = USBDEVFS_URB_TYPE_BULK;
707 urb->usercontext = s;
708 urb->buffer = pbuf;
709
710 if (rem > MAX_USBFS_BUFFER_SIZE) {
711 urb->buffer_length = MAX_USBFS_BUFFER_SIZE;
712 aurb->more = 1;
713 } else {
714 urb->buffer_length = rem;
715 aurb->more = 0;
716 }
717 pbuf += urb->buffer_length;
718 rem -= urb->buffer_length;
719
720 ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
721
722 DPRINTF("husb: data submit: ep 0x%x, len %u, more %d, packet %p, aurb %p\n",
723 urb->endpoint, urb->buffer_length, aurb->more, p, aurb);
724
725 if (ret < 0) {
726 DPRINTF("husb: submit failed. errno %d\n", errno);
727 async_free(aurb);
728
729 switch(errno) {
730 case ETIMEDOUT:
731 return USB_RET_NAK;
732 case EPIPE:
733 default:
734 return USB_RET_STALL;
735 }
736 }
737 }
738
739 return USB_RET_ASYNC;
740 }
741
742 static int ctrl_error(void)
743 {
744 if (errno == ETIMEDOUT) {
745 return USB_RET_NAK;
746 } else {
747 return USB_RET_STALL;
748 }
749 }
750
751 static int usb_host_set_address(USBHostDevice *s, int addr)
752 {
753 DPRINTF("husb: ctrl set addr %u\n", addr);
754 s->dev.addr = addr;
755 return 0;
756 }
757
758 static int usb_host_set_config(USBHostDevice *s, int config)
759 {
760 usb_host_release_interfaces(s);
761
762 int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
763
764 DPRINTF("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
765
766 if (ret < 0) {
767 return ctrl_error();
768 }
769 usb_host_claim_interfaces(s, config);
770 return 0;
771 }
772
773 static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
774 {
775 struct usbdevfs_setinterface si;
776 int i, ret;
777
778 for (i = 1; i <= MAX_ENDPOINTS; i++) {
779 if (is_isoc(s, i)) {
780 usb_host_stop_n_free_iso(s, i);
781 }
782 }
783
784 si.interface = iface;
785 si.altsetting = alt;
786 ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
787
788 DPRINTF("husb: ctrl set iface %d altset %d ret %d errno %d\n",
789 iface, alt, ret, errno);
790
791 if (ret < 0) {
792 return ctrl_error();
793 }
794 usb_linux_update_endp_table(s);
795 return 0;
796 }
797
798 static int usb_host_handle_control(USBDevice *dev, USBPacket *p,
799 int request, int value, int index, int length, uint8_t *data)
800 {
801 USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
802 struct usbdevfs_urb *urb;
803 AsyncURB *aurb;
804 int ret;
805
806 /*
807 * Process certain standard device requests.
808 * These are infrequent and are processed synchronously.
809 */
810
811 /* Note request is (bRequestType << 8) | bRequest */
812 DPRINTF("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
813 request >> 8, request & 0xff, value, index, length);
814
815 switch (request) {
816 case DeviceOutRequest | USB_REQ_SET_ADDRESS:
817 return usb_host_set_address(s, value);
818
819 case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
820 return usb_host_set_config(s, value & 0xff);
821
822 case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
823 return usb_host_set_interface(s, index, value);
824 }
825
826 /* The rest are asynchronous */
827
828 if (length > sizeof(dev->data_buf)) {
829 fprintf(stderr, "husb: ctrl buffer too small (%d > %zu)\n",
830 length, sizeof(dev->data_buf));
831 return USB_RET_STALL;
832 }
833
834 aurb = async_alloc(s);
835 aurb->packet = p;
836
837 /*
838 * Setup ctrl transfer.
839 *
840 * s->ctrl is laid out such that data buffer immediately follows
841 * 'req' struct which is exactly what usbdevfs expects.
842 */
843 urb = &aurb->urb;
844
845 urb->type = USBDEVFS_URB_TYPE_CONTROL;
846 urb->endpoint = p->devep;
847
848 urb->buffer = &dev->setup_buf;
849 urb->buffer_length = length + 8;
850
851 urb->usercontext = s;
852
853 ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
854
855 DPRINTF("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
856
857 if (ret < 0) {
858 DPRINTF("husb: submit failed. errno %d\n", errno);
859 async_free(aurb);
860
861 switch(errno) {
862 case ETIMEDOUT:
863 return USB_RET_NAK;
864 case EPIPE:
865 default:
866 return USB_RET_STALL;
867 }
868 }
869
870 return USB_RET_ASYNC;
871 }
872
873 static int usb_linux_get_configuration(USBHostDevice *s)
874 {
875 uint8_t configuration;
876 struct usb_ctrltransfer ct;
877 int ret;
878
879 if (usb_fs_type == USB_FS_SYS) {
880 char device_name[32], line[1024];
881 int configuration;
882
883 sprintf(device_name, "%d-%s", s->bus_num, s->port);
884
885 if (!usb_host_read_file(line, sizeof(line), "bConfigurationValue",
886 device_name)) {
887 goto usbdevfs;
888 }
889 if (sscanf(line, "%d", &configuration) != 1) {
890 goto usbdevfs;
891 }
892 return configuration;
893 }
894
895 usbdevfs:
896 ct.bRequestType = USB_DIR_IN;
897 ct.bRequest = USB_REQ_GET_CONFIGURATION;
898 ct.wValue = 0;
899 ct.wIndex = 0;
900 ct.wLength = 1;
901 ct.data = &configuration;
902 ct.timeout = 50;
903
904 ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
905 if (ret < 0) {
906 perror("usb_linux_get_configuration");
907 return -1;
908 }
909
910 /* in address state */
911 if (configuration == 0) {
912 return -1;
913 }
914
915 return configuration;
916 }
917
918 static uint8_t usb_linux_get_alt_setting(USBHostDevice *s,
919 uint8_t configuration, uint8_t interface)
920 {
921 uint8_t alt_setting;
922 struct usb_ctrltransfer ct;
923 int ret;
924
925 if (usb_fs_type == USB_FS_SYS) {
926 char device_name[64], line[1024];
927 int alt_setting;
928
929 sprintf(device_name, "%d-%s:%d.%d", s->bus_num, s->port,
930 (int)configuration, (int)interface);
931
932 if (!usb_host_read_file(line, sizeof(line), "bAlternateSetting",
933 device_name)) {
934 goto usbdevfs;
935 }
936 if (sscanf(line, "%d", &alt_setting) != 1) {
937 goto usbdevfs;
938 }
939 return alt_setting;
940 }
941
942 usbdevfs:
943 ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
944 ct.bRequest = USB_REQ_GET_INTERFACE;
945 ct.wValue = 0;
946 ct.wIndex = interface;
947 ct.wLength = 1;
948 ct.data = &alt_setting;
949 ct.timeout = 50;
950 ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
951 if (ret < 0) {
952 /* Assume alt 0 on error */
953 return 0;
954 }
955
956 return alt_setting;
957 }
958
959 /* returns 1 on problem encountered or 0 for success */
960 static int usb_linux_update_endp_table(USBHostDevice *s)
961 {
962 uint8_t *descriptors;
963 uint8_t devep, type, configuration, alt_interface;
964 int interface, length, i;
965
966 for (i = 0; i < MAX_ENDPOINTS; i++)
967 s->endp_table[i].type = INVALID_EP_TYPE;
968
969 i = usb_linux_get_configuration(s);
970 if (i < 0)
971 return 1;
972 configuration = i;
973
974 /* get the desired configuration, interface, and endpoint descriptors
975 * from device description */
976 descriptors = &s->descr[18];
977 length = s->descr_len - 18;
978 i = 0;
979
980 if (descriptors[i + 1] != USB_DT_CONFIG ||
981 descriptors[i + 5] != configuration) {
982 DPRINTF("invalid descriptor data - configuration\n");
983 return 1;
984 }
985 i += descriptors[i];
986
987 while (i < length) {
988 if (descriptors[i + 1] != USB_DT_INTERFACE ||
989 (descriptors[i + 1] == USB_DT_INTERFACE &&
990 descriptors[i + 4] == 0)) {
991 i += descriptors[i];
992 continue;
993 }
994
995 interface = descriptors[i + 2];
996 alt_interface = usb_linux_get_alt_setting(s, configuration, interface);
997
998 /* the current interface descriptor is the active interface
999 * and has endpoints */
1000 if (descriptors[i + 3] != alt_interface) {
1001 i += descriptors[i];
1002 continue;
1003 }
1004
1005 /* advance to the endpoints */
1006 while (i < length && descriptors[i +1] != USB_DT_ENDPOINT) {
1007 i += descriptors[i];
1008 }
1009
1010 if (i >= length)
1011 break;
1012
1013 while (i < length) {
1014 if (descriptors[i + 1] != USB_DT_ENDPOINT) {
1015 break;
1016 }
1017
1018 devep = descriptors[i + 2];
1019 switch (descriptors[i + 3] & 0x3) {
1020 case 0x00:
1021 type = USBDEVFS_URB_TYPE_CONTROL;
1022 break;
1023 case 0x01:
1024 type = USBDEVFS_URB_TYPE_ISO;
1025 set_max_packet_size(s, (devep & 0xf), descriptors + i);
1026 break;
1027 case 0x02:
1028 type = USBDEVFS_URB_TYPE_BULK;
1029 break;
1030 case 0x03:
1031 type = USBDEVFS_URB_TYPE_INTERRUPT;
1032 break;
1033 default:
1034 DPRINTF("usb_host: malformed endpoint type\n");
1035 type = USBDEVFS_URB_TYPE_BULK;
1036 }
1037 s->endp_table[(devep & 0xf) - 1].type = type;
1038 s->endp_table[(devep & 0xf) - 1].halted = 0;
1039
1040 i += descriptors[i];
1041 }
1042 }
1043 return 0;
1044 }
1045
1046 static int usb_host_open(USBHostDevice *dev, int bus_num,
1047 int addr, char *port, const char *prod_name)
1048 {
1049 int fd = -1, ret;
1050 struct usbdevfs_connectinfo ci;
1051 char buf[1024];
1052
1053 if (dev->fd != -1) {
1054 goto fail;
1055 }
1056 printf("husb: open device %d.%d\n", bus_num, addr);
1057
1058 if (!usb_host_device_path) {
1059 perror("husb: USB Host Device Path not set");
1060 goto fail;
1061 }
1062 snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
1063 bus_num, addr);
1064 fd = open(buf, O_RDWR | O_NONBLOCK);
1065 if (fd < 0) {
1066 perror(buf);
1067 goto fail;
1068 }
1069 DPRINTF("husb: opened %s\n", buf);
1070
1071 dev->bus_num = bus_num;
1072 dev->addr = addr;
1073 strcpy(dev->port, port);
1074 dev->fd = fd;
1075
1076 /* read the device description */
1077 dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
1078 if (dev->descr_len <= 0) {
1079 perror("husb: reading device data failed");
1080 goto fail;
1081 }
1082
1083 #ifdef DEBUG
1084 {
1085 int x;
1086 printf("=== begin dumping device descriptor data ===\n");
1087 for (x = 0; x < dev->descr_len; x++) {
1088 printf("%02x ", dev->descr[x]);
1089 }
1090 printf("\n=== end dumping device descriptor data ===\n");
1091 }
1092 #endif
1093
1094
1095 /*
1096 * Initial configuration is -1 which makes us claim first
1097 * available config. We used to start with 1, which does not
1098 * always work. I've seen devices where first config starts
1099 * with 2.
1100 */
1101 if (!usb_host_claim_interfaces(dev, -1)) {
1102 goto fail;
1103 }
1104
1105 ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
1106 if (ret < 0) {
1107 perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
1108 goto fail;
1109 }
1110
1111 printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
1112
1113 ret = usb_linux_update_endp_table(dev);
1114 if (ret) {
1115 goto fail;
1116 }
1117
1118 if (ci.slow) {
1119 dev->dev.speed = USB_SPEED_LOW;
1120 } else {
1121 dev->dev.speed = USB_SPEED_HIGH;
1122 }
1123
1124 if (!prod_name || prod_name[0] == '\0') {
1125 snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
1126 "host:%d.%d", bus_num, addr);
1127 } else {
1128 pstrcpy(dev->dev.product_desc, sizeof(dev->dev.product_desc),
1129 prod_name);
1130 }
1131
1132 /* USB devio uses 'write' flag to check for async completions */
1133 qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
1134
1135 usb_device_attach(&dev->dev);
1136 return 0;
1137
1138 fail:
1139 dev->fd = -1;
1140 if (fd != -1) {
1141 close(fd);
1142 }
1143 return -1;
1144 }
1145
1146 static int usb_host_close(USBHostDevice *dev)
1147 {
1148 int i;
1149
1150 if (dev->fd == -1) {
1151 return -1;
1152 }
1153
1154 qemu_set_fd_handler(dev->fd, NULL, NULL, NULL);
1155 dev->closing = 1;
1156 for (i = 1; i <= MAX_ENDPOINTS; i++) {
1157 if (is_isoc(dev, i)) {
1158 usb_host_stop_n_free_iso(dev, i);
1159 }
1160 }
1161 async_complete(dev);
1162 dev->closing = 0;
1163 usb_device_detach(&dev->dev);
1164 ioctl(dev->fd, USBDEVFS_RESET);
1165 close(dev->fd);
1166 dev->fd = -1;
1167 return 0;
1168 }
1169
1170 static void usb_host_exit_notifier(struct Notifier* n)
1171 {
1172 USBHostDevice *s = container_of(n, USBHostDevice, exit);
1173
1174 if (s->fd != -1) {
1175 ioctl(s->fd, USBDEVFS_RESET);
1176 }
1177 }
1178
1179 static int usb_host_initfn(USBDevice *dev)
1180 {
1181 USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
1182
1183 dev->auto_attach = 0;
1184 s->fd = -1;
1185 QTAILQ_INSERT_TAIL(&hostdevs, s, next);
1186 s->exit.notify = usb_host_exit_notifier;
1187 qemu_add_exit_notifier(&s->exit);
1188 usb_host_auto_check(NULL);
1189 return 0;
1190 }
1191
1192 static struct USBDeviceInfo usb_host_dev_info = {
1193 .product_desc = "USB Host Device",
1194 .qdev.name = "usb-host",
1195 .qdev.size = sizeof(USBHostDevice),
1196 .init = usb_host_initfn,
1197 .handle_packet = usb_generic_handle_packet,
1198 .cancel_packet = usb_host_async_cancel,
1199 .handle_data = usb_host_handle_data,
1200 .handle_control = usb_host_handle_control,
1201 .handle_reset = usb_host_handle_reset,
1202 .handle_destroy = usb_host_handle_destroy,
1203 .usbdevice_name = "host",
1204 .usbdevice_init = usb_host_device_open,
1205 .qdev.props = (Property[]) {
1206 DEFINE_PROP_UINT32("hostbus", USBHostDevice, match.bus_num, 0),
1207 DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr, 0),
1208 DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
1209 DEFINE_PROP_HEX32("vendorid", USBHostDevice, match.vendor_id, 0),
1210 DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
1211 DEFINE_PROP_END_OF_LIST(),
1212 },
1213 };
1214
1215 static void usb_host_register_devices(void)
1216 {
1217 usb_qdev_register(&usb_host_dev_info);
1218 }
1219 device_init(usb_host_register_devices)
1220
1221 USBDevice *usb_host_device_open(const char *devname)
1222 {
1223 struct USBAutoFilter filter;
1224 USBDevice *dev;
1225 char *p;
1226
1227 dev = usb_create(NULL /* FIXME */, "usb-host");
1228
1229 if (strstr(devname, "auto:")) {
1230 if (parse_filter(devname, &filter) < 0) {
1231 goto fail;
1232 }
1233 } else {
1234 if ((p = strchr(devname, '.'))) {
1235 filter.bus_num = strtoul(devname, NULL, 0);
1236 filter.addr = strtoul(p + 1, NULL, 0);
1237 filter.vendor_id = 0;
1238 filter.product_id = 0;
1239 } else if ((p = strchr(devname, ':'))) {
1240 filter.bus_num = 0;
1241 filter.addr = 0;
1242 filter.vendor_id = strtoul(devname, NULL, 16);
1243 filter.product_id = strtoul(p + 1, NULL, 16);
1244 } else {
1245 goto fail;
1246 }
1247 }
1248
1249 qdev_prop_set_uint32(&dev->qdev, "hostbus", filter.bus_num);
1250 qdev_prop_set_uint32(&dev->qdev, "hostaddr", filter.addr);
1251 qdev_prop_set_uint32(&dev->qdev, "vendorid", filter.vendor_id);
1252 qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
1253 qdev_init_nofail(&dev->qdev);
1254 return dev;
1255
1256 fail:
1257 qdev_free(&dev->qdev);
1258 return NULL;
1259 }
1260
1261 int usb_host_device_close(const char *devname)
1262 {
1263 #if 0
1264 char product_name[PRODUCT_NAME_SZ];
1265 int bus_num, addr;
1266 USBHostDevice *s;
1267
1268 if (strstr(devname, "auto:")) {
1269 return usb_host_auto_del(devname);
1270 }
1271 if (usb_host_find_device(&bus_num, &addr, product_name,
1272 sizeof(product_name), devname) < 0) {
1273 return -1;
1274 }
1275 s = hostdev_find(bus_num, addr);
1276 if (s) {
1277 usb_device_delete_addr(s->bus_num, s->dev.addr);
1278 return 0;
1279 }
1280 #endif
1281
1282 return -1;
1283 }
1284
1285 static int get_tag_value(char *buf, int buf_size,
1286 const char *str, const char *tag,
1287 const char *stopchars)
1288 {
1289 const char *p;
1290 char *q;
1291 p = strstr(str, tag);
1292 if (!p) {
1293 return -1;
1294 }
1295 p += strlen(tag);
1296 while (qemu_isspace(*p)) {
1297 p++;
1298 }
1299 q = buf;
1300 while (*p != '\0' && !strchr(stopchars, *p)) {
1301 if ((q - buf) < (buf_size - 1)) {
1302 *q++ = *p;
1303 }
1304 p++;
1305 }
1306 *q = '\0';
1307 return q - buf;
1308 }
1309
1310 /*
1311 * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
1312 * host's USB devices. This is legacy support since many distributions
1313 * are moving to /sys/bus/usb
1314 */
1315 static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
1316 {
1317 FILE *f = NULL;
1318 char line[1024];
1319 char buf[1024];
1320 int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1321 char product_name[512];
1322 int ret = 0;
1323
1324 if (!usb_host_device_path) {
1325 perror("husb: USB Host Device Path not set");
1326 goto the_end;
1327 }
1328 snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
1329 f = fopen(line, "r");
1330 if (!f) {
1331 perror("husb: cannot open devices file");
1332 goto the_end;
1333 }
1334
1335 device_count = 0;
1336 bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1337 for(;;) {
1338 if (fgets(line, sizeof(line), f) == NULL) {
1339 break;
1340 }
1341 if (strlen(line) > 0) {
1342 line[strlen(line) - 1] = '\0';
1343 }
1344 if (line[0] == 'T' && line[1] == ':') {
1345 if (device_count && (vendor_id || product_id)) {
1346 /* New device. Add the previously discovered device. */
1347 ret = func(opaque, bus_num, addr, 0, class_id, vendor_id,
1348 product_id, product_name, speed);
1349 if (ret) {
1350 goto the_end;
1351 }
1352 }
1353 if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0) {
1354 goto fail;
1355 }
1356 bus_num = atoi(buf);
1357 if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0) {
1358 goto fail;
1359 }
1360 addr = atoi(buf);
1361 if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0) {
1362 goto fail;
1363 }
1364 if (!strcmp(buf, "480")) {
1365 speed = USB_SPEED_HIGH;
1366 } else if (!strcmp(buf, "1.5")) {
1367 speed = USB_SPEED_LOW;
1368 } else {
1369 speed = USB_SPEED_FULL;
1370 }
1371 product_name[0] = '\0';
1372 class_id = 0xff;
1373 device_count++;
1374 product_id = 0;
1375 vendor_id = 0;
1376 } else if (line[0] == 'P' && line[1] == ':') {
1377 if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0) {
1378 goto fail;
1379 }
1380 vendor_id = strtoul(buf, NULL, 16);
1381 if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0) {
1382 goto fail;
1383 }
1384 product_id = strtoul(buf, NULL, 16);
1385 } else if (line[0] == 'S' && line[1] == ':') {
1386 if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0) {
1387 goto fail;
1388 }
1389 pstrcpy(product_name, sizeof(product_name), buf);
1390 } else if (line[0] == 'D' && line[1] == ':') {
1391 if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0) {
1392 goto fail;
1393 }
1394 class_id = strtoul(buf, NULL, 16);
1395 }
1396 fail: ;
1397 }
1398 if (device_count && (vendor_id || product_id)) {
1399 /* Add the last device. */
1400 ret = func(opaque, bus_num, addr, 0, class_id, vendor_id,
1401 product_id, product_name, speed);
1402 }
1403 the_end:
1404 if (f) {
1405 fclose(f);
1406 }
1407 return ret;
1408 }
1409
1410 /*
1411 * Read sys file-system device file
1412 *
1413 * @line address of buffer to put file contents in
1414 * @line_size size of line
1415 * @device_file path to device file (printf format string)
1416 * @device_name device being opened (inserted into device_file)
1417 *
1418 * @return 0 failed, 1 succeeded ('line' contains data)
1419 */
1420 static int usb_host_read_file(char *line, size_t line_size,
1421 const char *device_file, const char *device_name)
1422 {
1423 FILE *f;
1424 int ret = 0;
1425 char filename[PATH_MAX];
1426
1427 snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
1428 device_file);
1429 f = fopen(filename, "r");
1430 if (f) {
1431 ret = fgets(line, line_size, f) != NULL;
1432 fclose(f);
1433 }
1434
1435 return ret;
1436 }
1437
1438 /*
1439 * Use /sys/bus/usb/devices/ directory to determine host's USB
1440 * devices.
1441 *
1442 * This code is based on Robert Schiele's original patches posted to
1443 * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
1444 */
1445 static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
1446 {
1447 DIR *dir = NULL;
1448 char line[1024];
1449 int bus_num, addr, speed, class_id, product_id, vendor_id;
1450 int ret = 0;
1451 char port[MAX_PORTLEN];
1452 char product_name[512];
1453 struct dirent *de;
1454
1455 dir = opendir(USBSYSBUS_PATH "/devices");
1456 if (!dir) {
1457 perror("husb: cannot open devices directory");
1458 goto the_end;
1459 }
1460
1461 while ((de = readdir(dir))) {
1462 if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
1463 if (sscanf(de->d_name, "%d-%7[0-9.]", &bus_num, port) < 2) {
1464 continue;
1465 }
1466
1467 if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name)) {
1468 goto the_end;
1469 }
1470 if (sscanf(line, "%d", &addr) != 1) {
1471 goto the_end;
1472 }
1473 if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
1474 de->d_name)) {
1475 goto the_end;
1476 }
1477 if (sscanf(line, "%x", &class_id) != 1) {
1478 goto the_end;
1479 }
1480
1481 if (!usb_host_read_file(line, sizeof(line), "idVendor",
1482 de->d_name)) {
1483 goto the_end;
1484 }
1485 if (sscanf(line, "%x", &vendor_id) != 1) {
1486 goto the_end;
1487 }
1488 if (!usb_host_read_file(line, sizeof(line), "idProduct",
1489 de->d_name)) {
1490 goto the_end;
1491 }
1492 if (sscanf(line, "%x", &product_id) != 1) {
1493 goto the_end;
1494 }
1495 if (!usb_host_read_file(line, sizeof(line), "product",
1496 de->d_name)) {
1497 *product_name = 0;
1498 } else {
1499 if (strlen(line) > 0) {
1500 line[strlen(line) - 1] = '\0';
1501 }
1502 pstrcpy(product_name, sizeof(product_name), line);
1503 }
1504
1505 if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name)) {
1506 goto the_end;
1507 }
1508 if (!strcmp(line, "480\n")) {
1509 speed = USB_SPEED_HIGH;
1510 } else if (!strcmp(line, "1.5\n")) {
1511 speed = USB_SPEED_LOW;
1512 } else {
1513 speed = USB_SPEED_FULL;
1514 }
1515
1516 ret = func(opaque, bus_num, addr, port, class_id, vendor_id,
1517 product_id, product_name, speed);
1518 if (ret) {
1519 goto the_end;
1520 }
1521 }
1522 }
1523 the_end:
1524 if (dir) {
1525 closedir(dir);
1526 }
1527 return ret;
1528 }
1529
1530 /*
1531 * Determine how to access the host's USB devices and call the
1532 * specific support function.
1533 */
1534 static int usb_host_scan(void *opaque, USBScanFunc *func)
1535 {
1536 Monitor *mon = cur_mon;
1537 FILE *f = NULL;
1538 DIR *dir = NULL;
1539 int ret = 0;
1540 const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
1541 char devpath[PATH_MAX];
1542
1543 /* only check the host once */
1544 if (!usb_fs_type) {
1545 dir = opendir(USBSYSBUS_PATH "/devices");
1546 if (dir) {
1547 /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
1548 strcpy(devpath, USBDEVBUS_PATH);
1549 usb_fs_type = USB_FS_SYS;
1550 closedir(dir);
1551 DPRINTF(USBDBG_DEVOPENED, USBSYSBUS_PATH);
1552 goto found_devices;
1553 }
1554 f = fopen(USBPROCBUS_PATH "/devices", "r");
1555 if (f) {
1556 /* devices found in /proc/bus/usb/ */
1557 strcpy(devpath, USBPROCBUS_PATH);
1558 usb_fs_type = USB_FS_PROC;
1559 fclose(f);
1560 DPRINTF(USBDBG_DEVOPENED, USBPROCBUS_PATH);
1561 goto found_devices;
1562 }
1563 /* try additional methods if an access method hasn't been found yet */
1564 f = fopen(USBDEVBUS_PATH "/devices", "r");
1565 if (f) {
1566 /* devices found in /dev/bus/usb/ */
1567 strcpy(devpath, USBDEVBUS_PATH);
1568 usb_fs_type = USB_FS_DEV;
1569 fclose(f);
1570 DPRINTF(USBDBG_DEVOPENED, USBDEVBUS_PATH);
1571 goto found_devices;
1572 }
1573 found_devices:
1574 if (!usb_fs_type) {
1575 if (mon) {
1576 monitor_printf(mon, "husb: unable to access USB devices\n");
1577 }
1578 return -ENOENT;
1579 }
1580
1581 /* the module setting (used later for opening devices) */
1582 usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
1583 strcpy(usb_host_device_path, devpath);
1584 if (mon) {
1585 monitor_printf(mon, "husb: using %s file-system with %s\n",
1586 fs_type[usb_fs_type], usb_host_device_path);
1587 }
1588 }
1589
1590 switch (usb_fs_type) {
1591 case USB_FS_PROC:
1592 case USB_FS_DEV:
1593 ret = usb_host_scan_dev(opaque, func);
1594 break;
1595 case USB_FS_SYS:
1596 ret = usb_host_scan_sys(opaque, func);
1597 break;
1598 default:
1599 ret = -EINVAL;
1600 break;
1601 }
1602 return ret;
1603 }
1604
1605 static QEMUTimer *usb_auto_timer;
1606
1607 static int usb_host_auto_scan(void *opaque, int bus_num, int addr, char *port,
1608 int class_id, int vendor_id, int product_id,
1609 const char *product_name, int speed)
1610 {
1611 struct USBAutoFilter *f;
1612 struct USBHostDevice *s;
1613
1614 /* Ignore hubs */
1615 if (class_id == 9)
1616 return 0;
1617
1618 QTAILQ_FOREACH(s, &hostdevs, next) {
1619 f = &s->match;
1620
1621 if (f->bus_num > 0 && f->bus_num != bus_num) {
1622 continue;
1623 }
1624 if (f->addr > 0 && f->addr != addr) {
1625 continue;
1626 }
1627 if (f->port != NULL && (port == NULL || strcmp(f->port, port) != 0)) {
1628 continue;
1629 }
1630
1631 if (f->vendor_id > 0 && f->vendor_id != vendor_id) {
1632 continue;
1633 }
1634
1635 if (f->product_id > 0 && f->product_id != product_id) {
1636 continue;
1637 }
1638 /* We got a match */
1639
1640 /* Already attached ? */
1641 if (s->fd != -1) {
1642 return 0;
1643 }
1644 DPRINTF("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1645
1646 usb_host_open(s, bus_num, addr, port, product_name);
1647 }
1648
1649 return 0;
1650 }
1651
1652 static void usb_host_auto_check(void *unused)
1653 {
1654 struct USBHostDevice *s;
1655 int unconnected = 0;
1656
1657 usb_host_scan(NULL, usb_host_auto_scan);
1658
1659 QTAILQ_FOREACH(s, &hostdevs, next) {
1660 if (s->fd == -1) {
1661 unconnected++;
1662 }
1663 }
1664
1665 if (unconnected == 0) {
1666 /* nothing to watch */
1667 if (usb_auto_timer) {
1668 qemu_del_timer(usb_auto_timer);
1669 }
1670 return;
1671 }
1672
1673 if (!usb_auto_timer) {
1674 usb_auto_timer = qemu_new_timer_ms(rt_clock, usb_host_auto_check, NULL);
1675 if (!usb_auto_timer) {
1676 return;
1677 }
1678 }
1679 qemu_mod_timer(usb_auto_timer, qemu_get_clock_ms(rt_clock) + 2000);
1680 }
1681
1682 /*
1683 * Autoconnect filter
1684 * Format:
1685 * auto:bus:dev[:vid:pid]
1686 * auto:bus.dev[:vid:pid]
1687 *
1688 * bus - bus number (dec, * means any)
1689 * dev - device number (dec, * means any)
1690 * vid - vendor id (hex, * means any)
1691 * pid - product id (hex, * means any)
1692 *
1693 * See 'lsusb' output.
1694 */
1695 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1696 {
1697 enum { BUS, DEV, VID, PID, DONE };
1698 const char *p = spec;
1699 int i;
1700
1701 f->bus_num = 0;
1702 f->addr = 0;
1703 f->vendor_id = 0;
1704 f->product_id = 0;
1705
1706 for (i = BUS; i < DONE; i++) {
1707 p = strpbrk(p, ":.");
1708 if (!p) {
1709 break;
1710 }
1711 p++;
1712
1713 if (*p == '*') {
1714 continue;
1715 }
1716 switch(i) {
1717 case BUS: f->bus_num = strtol(p, NULL, 10); break;
1718 case DEV: f->addr = strtol(p, NULL, 10); break;
1719 case VID: f->vendor_id = strtol(p, NULL, 16); break;
1720 case PID: f->product_id = strtol(p, NULL, 16); break;
1721 }
1722 }
1723
1724 if (i < DEV) {
1725 fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1726 return -1;
1727 }
1728
1729 return 0;
1730 }
1731
1732 /**********************/
1733 /* USB host device info */
1734
1735 struct usb_class_info {
1736 int class;
1737 const char *class_name;
1738 };
1739
1740 static const struct usb_class_info usb_class_info[] = {
1741 { USB_CLASS_AUDIO, "Audio"},
1742 { USB_CLASS_COMM, "Communication"},
1743 { USB_CLASS_HID, "HID"},
1744 { USB_CLASS_HUB, "Hub" },
1745 { USB_CLASS_PHYSICAL, "Physical" },
1746 { USB_CLASS_PRINTER, "Printer" },
1747 { USB_CLASS_MASS_STORAGE, "Storage" },
1748 { USB_CLASS_CDC_DATA, "Data" },
1749 { USB_CLASS_APP_SPEC, "Application Specific" },
1750 { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1751 { USB_CLASS_STILL_IMAGE, "Still Image" },
1752 { USB_CLASS_CSCID, "Smart Card" },
1753 { USB_CLASS_CONTENT_SEC, "Content Security" },
1754 { -1, NULL }
1755 };
1756
1757 static const char *usb_class_str(uint8_t class)
1758 {
1759 const struct usb_class_info *p;
1760 for(p = usb_class_info; p->class != -1; p++) {
1761 if (p->class == class) {
1762 break;
1763 }
1764 }
1765 return p->class_name;
1766 }
1767
1768 static void usb_info_device(Monitor *mon, int bus_num, int addr, char *port,
1769 int class_id, int vendor_id, int product_id,
1770 const char *product_name,
1771 int speed)
1772 {
1773 const char *class_str, *speed_str;
1774
1775 switch(speed) {
1776 case USB_SPEED_LOW:
1777 speed_str = "1.5";
1778 break;
1779 case USB_SPEED_FULL:
1780 speed_str = "12";
1781 break;
1782 case USB_SPEED_HIGH:
1783 speed_str = "480";
1784 break;
1785 default:
1786 speed_str = "?";
1787 break;
1788 }
1789
1790 monitor_printf(mon, " Bus %d, Addr %d, Port %s, Speed %s Mb/s\n",
1791 bus_num, addr, port, speed_str);
1792 class_str = usb_class_str(class_id);
1793 if (class_str) {
1794 monitor_printf(mon, " %s:", class_str);
1795 } else {
1796 monitor_printf(mon, " Class %02x:", class_id);
1797 }
1798 monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
1799 if (product_name[0] != '\0') {
1800 monitor_printf(mon, ", %s", product_name);
1801 }
1802 monitor_printf(mon, "\n");
1803 }
1804
1805 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1806 char *path, int class_id,
1807 int vendor_id, int product_id,
1808 const char *product_name,
1809 int speed)
1810 {
1811 Monitor *mon = opaque;
1812
1813 usb_info_device(mon, bus_num, addr, path, class_id, vendor_id, product_id,
1814 product_name, speed);
1815 return 0;
1816 }
1817
1818 static void dec2str(int val, char *str, size_t size)
1819 {
1820 if (val == 0) {
1821 snprintf(str, size, "*");
1822 } else {
1823 snprintf(str, size, "%d", val);
1824 }
1825 }
1826
1827 static void hex2str(int val, char *str, size_t size)
1828 {
1829 if (val == 0) {
1830 snprintf(str, size, "*");
1831 } else {
1832 snprintf(str, size, "%04x", val);
1833 }
1834 }
1835
1836 void usb_host_info(Monitor *mon)
1837 {
1838 struct USBAutoFilter *f;
1839 struct USBHostDevice *s;
1840
1841 usb_host_scan(mon, usb_host_info_device);
1842
1843 if (QTAILQ_EMPTY(&hostdevs)) {
1844 return;
1845 }
1846
1847 monitor_printf(mon, " Auto filters:\n");
1848 QTAILQ_FOREACH(s, &hostdevs, next) {
1849 char bus[10], addr[10], vid[10], pid[10];
1850 f = &s->match;
1851 dec2str(f->bus_num, bus, sizeof(bus));
1852 dec2str(f->addr, addr, sizeof(addr));
1853 hex2str(f->vendor_id, vid, sizeof(vid));
1854 hex2str(f->product_id, pid, sizeof(pid));
1855 monitor_printf(mon, " Bus %s, Addr %s, Port %s, ID %s:%s\n",
1856 bus, addr, f->port ? f->port : "*", vid, pid);
1857 }
1858 }
QEmu