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, int destroy)
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 int usb_host_handle_control(USBDevice *dev,
77 USBHostDevice *s = (USBHostDevice *)dev;
78 struct usb_ctrltransfer ct;
81 if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) {
82 /* specific SET_ADDRESS support */
86 ct.bRequestType = request >> 8;
87 ct.bRequest = request;
93 ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
107 static int usb_host_handle_data(USBDevice *dev, int pid,
109 uint8_t *data, int len)
111 USBHostDevice *s = (USBHostDevice *)dev;
112 struct usbdevfs_bulktransfer bt;
115 /* XXX: optimize and handle all data types by looking at the
117 if (pid == USB_TOKEN_IN)
123 ret = ioctl(s->fd, USBDEVFS_BULK, &bt);
131 printf("handle_data: errno=%d\n", errno);
133 return USB_RET_STALL;
140 /* XXX: exclude high speed devices or implement EHCI */
141 USBDevice *usb_host_device_open(const char *devname)
143 int fd, interface, ret, i;
145 struct usbdevfs_connectinfo ci;
148 int descr_len, dev_descr_len, config_descr_len, nb_interfaces;
150 char product_name[PRODUCT_NAME_SZ];
152 if (usb_host_find_device(&bus_num, &addr,
153 product_name, sizeof(product_name),
157 snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d",
159 fd = open(buf, O_RDWR);
165 /* read the config description */
166 descr_len = read(fd, descr, sizeof(descr));
167 if (descr_len <= 0) {
168 perror("read descr");
173 dev_descr_len = descr[0];
174 if (dev_descr_len > descr_len)
177 config_descr_len = descr[i];
178 if (i + config_descr_len > descr_len)
180 nb_interfaces = descr[i + 4];
181 if (nb_interfaces != 1) {
182 /* NOTE: currently we grab only one interface */
183 fprintf(stderr, "usb_host: only one interface supported\n");
187 #ifdef USBDEVFS_DISCONNECT
188 /* earlier Linux 2.4 do not support that */
190 struct usbdevfs_ioctl ctrl;
191 ctrl.ioctl_code = USBDEVFS_DISCONNECT;
193 ret = ioctl(fd, USBDEVFS_IOCTL, &ctrl);
194 if (ret < 0 && errno != ENODATA) {
195 perror("USBDEVFS_DISCONNECT");
201 /* XXX: only grab if all interfaces are free */
203 ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface);
205 if (errno == EBUSY) {
206 fprintf(stderr, "usb_host: device already grabbed\n");
208 perror("USBDEVFS_CLAIMINTERFACE");
215 ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
217 perror("USBDEVFS_CONNECTINFO");
222 printf("host USB device %d.%d grabbed\n", bus_num, addr);
225 dev = qemu_mallocz(sizeof(USBHostDevice));
230 dev->dev.speed = USB_SPEED_LOW;
232 dev->dev.speed = USB_SPEED_HIGH;
233 dev->dev.handle_packet = usb_generic_handle_packet;
235 dev->dev.handle_reset = usb_host_handle_reset;
236 dev->dev.handle_control = usb_host_handle_control;
237 dev->dev.handle_data = usb_host_handle_data;
239 if (product_name[0] == '\0')
240 snprintf(dev->dev.devname, sizeof(dev->dev.devname),
243 pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
246 return (USBDevice *)dev;
249 static int get_tag_value(char *buf, int buf_size,
250 const char *str, const char *tag,
251 const char *stopchars)
255 p = strstr(str, tag);
262 while (*p != '\0' && !strchr(stopchars, *p)) {
263 if ((q - buf) < (buf_size - 1))
271 static int usb_host_scan(void *opaque, USBScanFunc *func)
276 int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
278 char product_name[512];
280 f = fopen(USBDEVFS_PATH "/devices", "r");
282 term_printf("Could not open %s\n", USBDEVFS_PATH "/devices");
286 bus_num = addr = speed = class_id = product_id = vendor_id = 0;
289 if (fgets(line, sizeof(line), f) == NULL)
291 if (strlen(line) > 0)
292 line[strlen(line) - 1] = '\0';
293 if (line[0] == 'T' && line[1] == ':') {
294 if (device_count && (vendor_id || product_id)) {
295 /* New device. Add the previously discovered device. */
296 ret = func(opaque, bus_num, addr, class_id, vendor_id,
297 product_id, product_name, speed);
301 if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
304 if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
307 if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
309 if (!strcmp(buf, "480"))
310 speed = USB_SPEED_HIGH;
311 else if (!strcmp(buf, "1.5"))
312 speed = USB_SPEED_LOW;
314 speed = USB_SPEED_FULL;
315 product_name[0] = '\0';
320 } else if (line[0] == 'P' && line[1] == ':') {
321 if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
323 vendor_id = strtoul(buf, NULL, 16);
324 if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
326 product_id = strtoul(buf, NULL, 16);
327 } else if (line[0] == 'S' && line[1] == ':') {
328 if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
330 pstrcpy(product_name, sizeof(product_name), buf);
331 } else if (line[0] == 'D' && line[1] == ':') {
332 if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
334 class_id = strtoul(buf, NULL, 16);
338 if (device_count && (vendor_id || product_id)) {
339 /* Add the last device. */
340 ret = func(opaque, bus_num, addr, class_id, vendor_id,
341 product_id, product_name, speed);
348 typedef struct FindDeviceState {
353 char product_name[PRODUCT_NAME_SZ];
356 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
358 int vendor_id, int product_id,
359 const char *product_name, int speed)
361 FindDeviceState *s = opaque;
362 if ((vendor_id == s->vendor_id &&
363 product_id == s->product_id) ||
364 (bus_num == s->bus_num &&
366 pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
367 s->bus_num = bus_num;
376 'bus.addr' (decimal numbers) or
377 'vendor_id:product_id' (hexa numbers) */
378 static int usb_host_find_device(int *pbus_num, int *paddr,
379 char *product_name, int product_name_size,
386 p = strchr(devname, '.');
388 *pbus_num = strtoul(devname, NULL, 0);
389 *paddr = strtoul(p + 1, NULL, 0);
390 fs.bus_num = *pbus_num;
392 ret = usb_host_scan(&fs, usb_host_find_device_scan);
394 pstrcpy(product_name, product_name_size, fs.product_name);
397 p = strchr(devname, ':');
399 fs.vendor_id = strtoul(devname, NULL, 16);
400 fs.product_id = strtoul(p + 1, NULL, 16);
401 ret = usb_host_scan(&fs, usb_host_find_device_scan);
403 *pbus_num = fs.bus_num;
405 pstrcpy(product_name, product_name_size, fs.product_name);
412 /**********************/
413 /* USB host device info */
415 struct usb_class_info {
417 const char *class_name;
420 static const struct usb_class_info usb_class_info[] = {
421 { USB_CLASS_AUDIO, "Audio"},
422 { USB_CLASS_COMM, "Communication"},
423 { USB_CLASS_HID, "HID"},
424 { USB_CLASS_HUB, "Hub" },
425 { USB_CLASS_PHYSICAL, "Physical" },
426 { USB_CLASS_PRINTER, "Printer" },
427 { USB_CLASS_MASS_STORAGE, "Storage" },
428 { USB_CLASS_CDC_DATA, "Data" },
429 { USB_CLASS_APP_SPEC, "Application Specific" },
430 { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
431 { USB_CLASS_STILL_IMAGE, "Still Image" },
432 { USB_CLASS_CSCID, "Smart Card" },
433 { USB_CLASS_CONTENT_SEC, "Content Security" },
437 static const char *usb_class_str(uint8_t class)
439 const struct usb_class_info *p;
440 for(p = usb_class_info; p->class != -1; p++) {
441 if (p->class == class)
444 return p->class_name;
447 void usb_info_device(int bus_num, int addr, int class_id,
448 int vendor_id, int product_id,
449 const char *product_name,
452 const char *class_str, *speed_str;
469 term_printf(" Device %d.%d, speed %s Mb/s\n",
470 bus_num, addr, speed_str);
471 class_str = usb_class_str(class_id);
473 term_printf(" %s:", class_str);
475 term_printf(" Class %02x:", class_id);
476 term_printf(" USB device %04x:%04x", vendor_id, product_id);
477 if (product_name[0] != '\0')
478 term_printf(", %s", product_name);
482 static int usb_host_info_device(void *opaque, int bus_num, int addr,
484 int vendor_id, int product_id,
485 const char *product_name,
488 usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
489 product_name, speed);
493 void usb_host_info(void)
495 usb_host_scan(NULL, usb_host_info_device);
500 void usb_host_info(void)
502 term_printf("USB host devices not supported\n");
505 /* XXX: modify configure to compile the right host driver */
506 USBDevice *usb_host_device_open(const char *devname)