14 #define MY_SYSFS_FILENAME_LEN 255
15 #define MY_PATH_MAX 4096
18 struct list_head list;
19 struct usbinterface *next;
20 struct usbdevice *parent;
21 unsigned int configuration;
24 unsigned int bAlternateSetting;
25 unsigned int bInterfaceClass;
26 unsigned int bInterfaceNumber;
27 unsigned int bInterfaceProtocol;
28 unsigned int bInterfaceSubClass;
29 unsigned int bNumEndpoints;
31 char name[MY_SYSFS_FILENAME_LEN];
32 char driver[MY_SYSFS_FILENAME_LEN];
36 struct list_head list; /* connect devices independant of the bus */
37 struct usbdevice *next; /* next port on this hub */
38 struct usbinterface *first_interface; /* list of interfaces */
39 struct usbdevice *first_child; /* connect devices on this port */
40 struct usbdevice *parent; /* hub this device is connected to */
42 unsigned int parent_portnum;
45 unsigned int bConfigurationValue;
46 unsigned int bDeviceClass;
47 unsigned int bDeviceProtocol;
48 unsigned int bDeviceSubClass;
49 unsigned int bMaxPacketSize0;
51 unsigned int bNumConfigurations;
52 unsigned int bNumInterfaces;
53 unsigned int bcdDevice;
54 unsigned int bmAttributes;
55 unsigned int configuration;
57 unsigned int idProduct;
58 unsigned int idVendor;
59 unsigned int maxchild;
60 char manufacturer[64];
64 char speed[4 + 1]; /* '1.5','12','480' + '\n' */
66 char name[MY_SYSFS_FILENAME_LEN];
67 char driver[MY_SYSFS_FILENAME_LEN];
71 struct usbbusnode *next;
72 struct usbinterface *first_interface; /* list of interfaces */
73 struct usbdevice *first_child; /* connect childs belonging to this bus */
76 unsigned int bDeviceClass;
78 unsigned int maxchild;
79 char speed[4 + 1]; /* '1.5','12','480' + '\n' */
81 char driver[MY_SYSFS_FILENAME_LEN];
84 #define SYSFS_INTu(de,tgt, name) do { tgt->name = read_sysfs_file_int(de,#name,10); } while(0)
85 #define SYSFS_INTx(de,tgt, name) do { tgt->name = read_sysfs_file_int(de,#name,16); } while(0)
86 #define SYSFS_STR(de,tgt, name) do { read_sysfs_file_string(de, #name, tgt->name, MY_SYSFS_FILENAME_LEN); } while(0)
88 LIST_HEAD(interfacelist);
89 LIST_HEAD(usbdevlist);
90 static struct usbbusnode *usbbuslist;
92 static const char sys_bus_usb_devices[] = "/sys/bus/usb/devices";
96 static void dump_usbbusnode(struct usbbusnode *b)
98 printf(" B %p:'%u': n %p fi %p fc %p driver '%s'\n", b, b->busnum, b->next, b->first_interface, b->first_child, b->driver);
101 static void dump_usbdevice(struct usbdevice *d)
104 (" D %p:'%s': n %p fi %p fc %p bn %u ppn %u pn %u p %p bCV %u bDC %02x bDP %02x bDSC %02x bMPS %02x bMP '%s' bNC %u bNI %u bcdD %02x bmA %02x c %u dn %u idP %04x idV %04x mc %u m '%s' p '%s' s '%s' v '%s' sp '%s' driver '%s'\n",
105 d, d->name, d->next, d->first_interface, d->first_child, d->busnum, d->parent_portnum, d->portnum, d->parent, d->bConfigurationValue, d->bDeviceClass,
106 d->bDeviceProtocol, d->bDeviceSubClass, d->bMaxPacketSize0, d->bMaxPower, d->bNumConfigurations, d->bNumInterfaces, d->bcdDevice, d->bmAttributes,
107 d->configuration, d->devnum, d->idProduct, d->idVendor, d->maxchild, d->manufacturer, d->product, d->serial, d->version, d->speed, d->driver);
110 static void dump_usbinterface(struct usbinterface *i)
112 printf(" I %p:'%s': n %p c %u if %u bAS %u bIC %02x bIN %02x bIP %02x bISC %02x bNE %u d '%s'\n", i, i->name, i->next, i->configuration, i->ifnum,
113 i->bAlternateSetting, i->bInterfaceClass, i->bInterfaceNumber, i->bInterfaceProtocol, i->bInterfaceSubClass, i->bNumEndpoints, i->driver);
117 static char tmp_str[128];
118 static const char *bInterfaceClass_to_str(unsigned int dc)
165 snprintf(tmp_str, 128, "'bInterfaceClass 0x%02x not yet handled'", dc);;
170 static const char *bDeviceClass_to_str(unsigned int dc)
178 snprintf(tmp_str, 128, "'bDeviceClass 0x%02x not yet handled'", dc);;
183 static void print_usbbusnode(struct usbbusnode *b)
185 printf("/: Bus %02u.Port %u: Dev %u, Class=%s, Driver=%s/%up, %sM\n", b->busnum, 1,
186 b->devnum, bDeviceClass_to_str(b->bDeviceClass), b->driver, b->maxchild, b->speed);
189 static void print_usbdevice(struct usbdevice *d, struct usbinterface *i)
191 if (i->bInterfaceClass == 9)
192 printf("Port %u: Dev %u, If %u, Class=%s, Driver=%s/%up, %sM\n", d->portnum, d->devnum, i->ifnum, bInterfaceClass_to_str(i->bInterfaceClass),
193 i->driver, d->maxchild, d->speed);
195 printf("Port %u: Dev %u, If %u, Class=%s, Driver=%s, %sM\n", d->portnum, d->devnum, i->ifnum, bInterfaceClass_to_str(i->bInterfaceClass), i->driver,
199 static unsigned int read_sysfs_file_int(const char *d_name, const char *file, int base)
201 char buf[12], path[MY_PATH_MAX];
205 snprintf(path, MY_PATH_MAX, "%s/%s/%s", sys_bus_usb_devices, d_name, file);
206 path[MY_PATH_MAX - 1] = '\0';
207 fd = open(path, O_RDONLY);
210 memset(buf, 0, sizeof(buf));
211 r = read(fd, buf, sizeof(buf) - 1);
215 buf[sizeof(buf) - 1] = '\0';
216 ret = strtoul(buf, NULL, base);
217 return (unsigned int)ret;
224 static void read_sysfs_file_string(const char *d_name, const char *file, char *buf, int len)
226 char path[MY_PATH_MAX];
229 fd = snprintf(path, MY_PATH_MAX, "%s/%s/%s", sys_bus_usb_devices, d_name, file);
230 if (fd < 0 || fd >= MY_PATH_MAX)
233 fd = open(path, O_RDONLY);
236 r = read(fd, buf, len);
238 if (r >= 0 && r < len) {
241 while (buf[r] == '\n') {
256 static void append_dev_interface(struct usbinterface *i, struct usbinterface *new)
263 static void append_dev_sibling(struct usbdevice *d, struct usbdevice *new)
270 static void append_businterface(unsigned int busnum, struct usbinterface *new)
272 struct usbbusnode *b = usbbuslist;
273 struct usbinterface *i;
275 if (b->busnum == busnum) {
276 i = b->first_interface;
282 b->first_interface = new;
289 static void append_busnode(struct usbbusnode *new)
291 struct usbbusnode *b = usbbuslist;
300 static void add_usb_interface(const char *d_name)
302 struct usbinterface *e;
304 char *pn, link[MY_PATH_MAX];
307 p = strchr(d_name, ':');
309 i = strtoul(p, &pn, 10);
312 e = malloc(sizeof(struct usbinterface));
315 memset(e, 0, sizeof(struct usbinterface));
316 e->configuration = i;
318 i = strtoul(p, &pn, 10);
322 if (snprintf(e->name, MY_SYSFS_FILENAME_LEN, "%s", d_name) >= MY_SYSFS_FILENAME_LEN)
323 printf("warning: '%s' truncated to '%s'\n", e->name, d_name);
324 SYSFS_INTu(d_name, e, bAlternateSetting);
325 SYSFS_INTx(d_name, e, bInterfaceClass);
326 SYSFS_INTx(d_name, e, bInterfaceNumber);
327 SYSFS_INTx(d_name, e, bInterfaceProtocol);
328 SYSFS_INTx(d_name, e, bInterfaceSubClass);
329 SYSFS_INTx(d_name, e, bNumEndpoints);
330 l = snprintf(link, MY_PATH_MAX, "%s/%s/driver", sys_bus_usb_devices, d_name);
331 if (l > 0 && l < MY_PATH_MAX) {
332 l = readlink(link, link, MY_PATH_MAX);
336 if (l < MY_PATH_MAX - 1)
340 p = strrchr(link, '/');
342 snprintf(e->driver, sizeof(e->driver), "%s", p + 1);
345 printf("Can not read driver link for '%s': %d\n", d_name, l);
346 list_add_tail(&e->list, &interfacelist);
349 static void add_usb_device(const char *d_name)
353 char *pn, link[MY_PATH_MAX];
357 i = strtoul(p, &pn, 10);
360 d = malloc(sizeof(struct usbdevice));
363 memset(d, 0, sizeof(struct usbdevice));
367 i = strtoul(p, &pn, 10);
370 d->parent_portnum = d->portnum;
373 if (snprintf(d->name, MY_SYSFS_FILENAME_LEN, "%s", d_name) >= MY_SYSFS_FILENAME_LEN)
374 printf("warning: '%s' truncated to '%s'\n", d->name, d_name);
375 SYSFS_INTu(d_name, d, bConfigurationValue);
376 SYSFS_INTx(d_name, d, bDeviceClass);
377 SYSFS_INTx(d_name, d, bDeviceProtocol);
378 SYSFS_INTx(d_name, d, bDeviceSubClass);
379 SYSFS_INTx(d_name, d, bMaxPacketSize0);
380 SYSFS_STR(d_name, d, bMaxPower);
381 SYSFS_INTu(d_name, d, bNumConfigurations);
382 SYSFS_INTx(d_name, d, bNumInterfaces);
383 SYSFS_INTx(d_name, d, bcdDevice);
384 SYSFS_INTx(d_name, d, bmAttributes);
385 SYSFS_INTu(d_name, d, configuration);
386 SYSFS_INTu(d_name, d, devnum);
387 SYSFS_INTx(d_name, d, idProduct);
388 SYSFS_INTx(d_name, d, idVendor);
389 SYSFS_INTu(d_name, d, maxchild);
390 SYSFS_STR(d_name, d, manufacturer);
391 SYSFS_STR(d_name, d, product);
392 SYSFS_STR(d_name, d, serial);
393 SYSFS_STR(d_name, d, version);
394 SYSFS_STR(d_name, d, speed);
395 l = snprintf(link, MY_PATH_MAX, "%s/%s/driver", sys_bus_usb_devices, d_name);
396 if (l > 0 && l < MY_PATH_MAX) {
397 l = readlink(link, link, MY_PATH_MAX);
401 if (l < MY_PATH_MAX - 1)
405 p = strrchr(link, '/');
407 snprintf(d->driver, sizeof(d->driver), "%s", p + 1);
410 printf("Can not read driver link for '%s': %d\n", d_name, l);
411 list_add_tail(&d->list, &usbdevlist);
414 static void get_roothub_driver(struct usbbusnode *b, const char *d_name)
416 char *p, path[MY_PATH_MAX];
418 l = snprintf(path, MY_PATH_MAX, "%s/%s/../driver", sys_bus_usb_devices, d_name);
419 if (l > 0 && l < MY_PATH_MAX) {
420 l = readlink(path, path, MY_PATH_MAX);
424 if (l < MY_PATH_MAX - 1)
428 p = strrchr(path, '/');
430 snprintf(b->driver, sizeof(b->driver), "%s", p + 1);
433 printf("Can not read driver link for '%s': %d\n", d_name, l);
436 static void add_usb_bus(const char *d_name)
438 struct usbbusnode *bus;
439 bus = malloc(sizeof(struct usbbusnode));
441 memset(bus, 0, sizeof(struct usbbusnode));
442 bus->busnum = strtoul(d_name + 3, NULL, 10);
443 SYSFS_INTu(d_name, bus, devnum);
444 SYSFS_INTx(d_name, bus, bDeviceClass);
445 SYSFS_INTu(d_name, bus, maxchild);
446 SYSFS_STR(d_name, bus, speed);
448 get_roothub_driver(bus, d_name);
452 static void inspect_bus_entry(const char *d_name)
454 if (d_name[0] == '.' && (!d_name[1] || (d_name[1] == '.' && !d_name[2])))
456 if (d_name[0] == 'u' && d_name[1] == 's' && d_name[2] == 'b' && isdigit(d_name[3])) {
458 } else if (isdigit(d_name[0])) {
459 if (strchr(d_name, ':'))
460 add_usb_interface(d_name);
462 add_usb_device(d_name);
464 fprintf(stderr, "ignoring '%s'\n", d_name);
467 static void walk_usb_devices(DIR * sbud)
470 while ((de = readdir(sbud)))
471 inspect_bus_entry(de->d_name);
474 static void assign_dev_to_bus(struct usbdevice *d)
476 struct usbbusnode *b = usbbuslist;
478 if (b->busnum == d->busnum) {
480 append_dev_sibling(b->first_child, d);
488 static void assign_dev_to_parent(struct usbdevice *d)
491 struct usbdevice *pd;
492 char n[MY_SYSFS_FILENAME_LEN], *p;
493 for (l = usbdevlist.next; l != &usbdevlist; l = l->next) {
494 pd = list_entry(l, struct usbdevice, list);
497 if (pd->busnum == d->busnum && pd->portnum == d->parent_portnum) {
502 if (strcmp(n, pd->name)) {
507 append_dev_sibling(pd->first_child, d);
516 static void assign_interface_to_parent(struct usbdevice *d, struct usbinterface *i)
519 char *pn, name[MY_SYSFS_FILENAME_LEN];
523 p = strchr(i->name, ':');
526 if (l < MY_SYSFS_FILENAME_LEN) {
527 memcpy(name, i->name, l);
531 if (strcmp(d->name, name) == 0) {
533 if (d->first_interface)
534 append_dev_interface(d->first_interface, i);
536 d->first_interface = i;
538 busnum = strtoul(name, &pn, 10);
539 if (pn && pn != name) {
541 append_businterface(busnum, i);
547 static void connect_devices(void)
549 struct list_head *ld, *li;
551 struct usbinterface *e;
552 for (ld = usbdevlist.next; ld != &usbdevlist; ld = ld->next) {
553 d = list_entry(ld, struct usbdevice, list);
554 if (d->parent_portnum)
555 assign_dev_to_parent(d);
557 assign_dev_to_bus(d);
558 for (li = interfacelist.next; li != &interfacelist; li = li->next) {
559 e = list_entry(li, struct usbinterface, list);
561 assign_interface_to_parent(d, e);
564 for (li = interfacelist.next; li != &interfacelist; li = li->next) {
565 e = list_entry(li, struct usbinterface, list);
569 static void sort_dev_interfaces(struct usbinterface **i)
571 struct usbinterface *t, *p, **pp;
580 if (p->configuration > p->next->configuration) {
588 if (p->ifnum > p->next->ifnum) {
602 static void sort_dev_siblings(struct usbdevice **d)
604 struct usbdevice *t, *p, **pp;
609 sort_dev_siblings(&p->first_child);
610 if (p->first_interface)
611 sort_dev_interfaces(&p->first_interface);
617 if (p->portnum > p->next->portnum) {
631 static void sort_devices(void)
633 struct usbbusnode *b = usbbuslist;
636 sort_dev_siblings(&b->first_child);
641 static void sort_busses(void)
643 /* need to reverse sort bus numbers */
644 struct usbbusnode *t, *p, **pp;
651 if (p->busnum < p->next->busnum) {
665 static void print_tree_dev_interface(struct usbdevice *d, struct usbinterface *i)
669 printf(" %*s", indent, "|__ ");
670 print_usbdevice(d, i);
675 static void print_tree_dev_children(struct usbdevice *d)
679 print_tree_dev_interface(d, d->first_interface);
680 print_tree_dev_children(d->first_child);
686 static void print_tree(void)
688 struct usbbusnode *b = usbbuslist;
692 print_tree_dev_children(b->first_child);
699 DIR *sbud = opendir(sys_bus_usb_devices);
701 walk_usb_devices(sbud);
708 perror(sys_bus_usb_devices);