2 * Linux host USB redirector
4 * Copyright (c) 2005 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #if defined(__linux__)
28 #include <sys/ioctl.h>
29 #include <linux/usbdevice_fs.h>
30 #include <linux/version.h>
32 /* We redefine it to avoid version problems */
33 struct usb_ctrltransfer {
43 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
44 int vendor_id, int product_id,
45 const char *product_name, int speed);
46 static int usb_host_find_device(int *pbus_num, int *paddr,
47 char *product_name, int product_name_size,
52 #define USBDEVFS_PATH "/proc/bus/usb"
53 #define PRODUCT_NAME_SZ 32
55 typedef struct USBHostDevice {
60 static void usb_host_handle_reset(USBDevice *dev)
63 USBHostDevice *s = (USBHostDevice *)dev;
64 /* USBDEVFS_RESET, but not the first time as it has already be
65 done by the host OS */
66 ioctl(s->fd, USBDEVFS_RESET);
70 static void usb_host_handle_destroy(USBDevice *dev)
72 USBHostDevice *s = (USBHostDevice *)dev;
79 static int usb_host_handle_control(USBDevice *dev,
86 USBHostDevice *s = (USBHostDevice *)dev;
87 struct usb_ctrltransfer ct;
90 if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) {
91 /* specific SET_ADDRESS support */
95 ct.bRequestType = request >> 8;
96 ct.bRequest = request;
102 ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
108 return USB_RET_STALL;
116 static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
118 USBHostDevice *s = (USBHostDevice *)dev;
119 struct usbdevfs_bulktransfer bt;
121 uint8_t devep = p->devep;
123 /* XXX: optimize and handle all data types by looking at the
125 if (p->pid == USB_TOKEN_IN)
131 ret = ioctl(s->fd, USBDEVFS_BULK, &bt);
139 printf("handle_data: errno=%d\n", errno);
141 return USB_RET_STALL;
148 /* XXX: exclude high speed devices or implement EHCI */
149 USBDevice *usb_host_device_open(const char *devname)
151 int fd, interface, ret, i;
153 struct usbdevfs_connectinfo ci;
156 int descr_len, dev_descr_len, config_descr_len, nb_interfaces;
158 char product_name[PRODUCT_NAME_SZ];
160 if (usb_host_find_device(&bus_num, &addr,
161 product_name, sizeof(product_name),
165 snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d",
167 fd = open(buf, O_RDWR);
173 /* read the config description */
174 descr_len = read(fd, descr, sizeof(descr));
175 if (descr_len <= 0) {
176 perror("read descr");
181 dev_descr_len = descr[0];
182 if (dev_descr_len > descr_len)
185 config_descr_len = descr[i];
186 if (i + config_descr_len > descr_len)
188 nb_interfaces = descr[i + 4];
189 if (nb_interfaces != 1) {
190 /* NOTE: currently we grab only one interface */
191 fprintf(stderr, "usb_host: only one interface supported\n");
195 #ifdef USBDEVFS_DISCONNECT
196 /* earlier Linux 2.4 do not support that */
198 struct usbdevfs_ioctl ctrl;
199 ctrl.ioctl_code = USBDEVFS_DISCONNECT;
201 ret = ioctl(fd, USBDEVFS_IOCTL, &ctrl);
202 if (ret < 0 && errno != ENODATA) {
203 perror("USBDEVFS_DISCONNECT");
209 /* XXX: only grab if all interfaces are free */
211 ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface);
213 if (errno == EBUSY) {
214 fprintf(stderr, "usb_host: device already grabbed\n");
216 perror("USBDEVFS_CLAIMINTERFACE");
223 ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
225 perror("USBDEVFS_CONNECTINFO");
230 printf("host USB device %d.%d grabbed\n", bus_num, addr);
233 dev = qemu_mallocz(sizeof(USBHostDevice));
238 dev->dev.speed = USB_SPEED_LOW;
240 dev->dev.speed = USB_SPEED_HIGH;
241 dev->dev.handle_packet = usb_generic_handle_packet;
243 dev->dev.handle_reset = usb_host_handle_reset;
244 dev->dev.handle_control = usb_host_handle_control;
245 dev->dev.handle_data = usb_host_handle_data;
246 dev->dev.handle_destroy = usb_host_handle_destroy;
248 if (product_name[0] == '\0')
249 snprintf(dev->dev.devname, sizeof(dev->dev.devname),
252 pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
255 return (USBDevice *)dev;
258 static int get_tag_value(char *buf, int buf_size,
259 const char *str, const char *tag,
260 const char *stopchars)
264 p = strstr(str, tag);
271 while (*p != '\0' && !strchr(stopchars, *p)) {
272 if ((q - buf) < (buf_size - 1))
280 static int usb_host_scan(void *opaque, USBScanFunc *func)
285 int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
287 char product_name[512];
289 f = fopen(USBDEVFS_PATH "/devices", "r");
291 term_printf("Could not open %s\n", USBDEVFS_PATH "/devices");
295 bus_num = addr = speed = class_id = product_id = vendor_id = 0;
298 if (fgets(line, sizeof(line), f) == NULL)
300 if (strlen(line) > 0)
301 line[strlen(line) - 1] = '\0';
302 if (line[0] == 'T' && line[1] == ':') {
303 if (device_count && (vendor_id || product_id)) {
304 /* New device. Add the previously discovered device. */
305 ret = func(opaque, bus_num, addr, class_id, vendor_id,
306 product_id, product_name, speed);
310 if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
313 if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
316 if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
318 if (!strcmp(buf, "480"))
319 speed = USB_SPEED_HIGH;
320 else if (!strcmp(buf, "1.5"))
321 speed = USB_SPEED_LOW;
323 speed = USB_SPEED_FULL;
324 product_name[0] = '\0';
329 } else if (line[0] == 'P' && line[1] == ':') {
330 if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
332 vendor_id = strtoul(buf, NULL, 16);
333 if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
335 product_id = strtoul(buf, NULL, 16);
336 } else if (line[0] == 'S' && line[1] == ':') {
337 if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
339 pstrcpy(product_name, sizeof(product_name), buf);
340 } else if (line[0] == 'D' && line[1] == ':') {
341 if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
343 class_id = strtoul(buf, NULL, 16);
347 if (device_count && (vendor_id || product_id)) {
348 /* Add the last device. */
349 ret = func(opaque, bus_num, addr, class_id, vendor_id,
350 product_id, product_name, speed);
357 typedef struct FindDeviceState {
362 char product_name[PRODUCT_NAME_SZ];
365 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
367 int vendor_id, int product_id,
368 const char *product_name, int speed)
370 FindDeviceState *s = opaque;
371 if ((vendor_id == s->vendor_id &&
372 product_id == s->product_id) ||
373 (bus_num == s->bus_num &&
375 pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
376 s->bus_num = bus_num;
385 'bus.addr' (decimal numbers) or
386 'vendor_id:product_id' (hexa numbers) */
387 static int usb_host_find_device(int *pbus_num, int *paddr,
388 char *product_name, int product_name_size,
395 p = strchr(devname, '.');
397 *pbus_num = strtoul(devname, NULL, 0);
398 *paddr = strtoul(p + 1, NULL, 0);
399 fs.bus_num = *pbus_num;
401 ret = usb_host_scan(&fs, usb_host_find_device_scan);
403 pstrcpy(product_name, product_name_size, fs.product_name);
406 p = strchr(devname, ':');
408 fs.vendor_id = strtoul(devname, NULL, 16);
409 fs.product_id = strtoul(p + 1, NULL, 16);
410 ret = usb_host_scan(&fs, usb_host_find_device_scan);
412 *pbus_num = fs.bus_num;
414 pstrcpy(product_name, product_name_size, fs.product_name);
421 /**********************/
422 /* USB host device info */
424 struct usb_class_info {
426 const char *class_name;
429 static const struct usb_class_info usb_class_info[] = {
430 { USB_CLASS_AUDIO, "Audio"},
431 { USB_CLASS_COMM, "Communication"},
432 { USB_CLASS_HID, "HID"},
433 { USB_CLASS_HUB, "Hub" },
434 { USB_CLASS_PHYSICAL, "Physical" },
435 { USB_CLASS_PRINTER, "Printer" },
436 { USB_CLASS_MASS_STORAGE, "Storage" },
437 { USB_CLASS_CDC_DATA, "Data" },
438 { USB_CLASS_APP_SPEC, "Application Specific" },
439 { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
440 { USB_CLASS_STILL_IMAGE, "Still Image" },
441 { USB_CLASS_CSCID, "Smart Card" },
442 { USB_CLASS_CONTENT_SEC, "Content Security" },
446 static const char *usb_class_str(uint8_t class)
448 const struct usb_class_info *p;
449 for(p = usb_class_info; p->class != -1; p++) {
450 if (p->class == class)
453 return p->class_name;
456 void usb_info_device(int bus_num, int addr, int class_id,
457 int vendor_id, int product_id,
458 const char *product_name,
461 const char *class_str, *speed_str;
478 term_printf(" Device %d.%d, speed %s Mb/s\n",
479 bus_num, addr, speed_str);
480 class_str = usb_class_str(class_id);
482 term_printf(" %s:", class_str);
484 term_printf(" Class %02x:", class_id);
485 term_printf(" USB device %04x:%04x", vendor_id, product_id);
486 if (product_name[0] != '\0')
487 term_printf(", %s", product_name);
491 static int usb_host_info_device(void *opaque, int bus_num, int addr,
493 int vendor_id, int product_id,
494 const char *product_name,
497 usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
498 product_name, speed);
502 void usb_host_info(void)
504 usb_host_scan(NULL, usb_host_info_device);
509 void usb_host_info(void)
511 term_printf("USB host devices not supported\n");
514 /* XXX: modify configure to compile the right host driver */
515 USBDevice *usb_host_device_open(const char *devname)