2 * hid2hci : switch the radio on devices that support
3 * it from HID to HCI and back
5 * Copyright (C) 2003-2009 Marcel Holtmann <marcel@holtmann.org>
6 * Copyright (C) 2008-2009 Mario Limonciello <mario_limonciello@dell.com>
7 * Copyright (C) 2009 Kay Sievers <kay.sievers@vrfy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 #include <sys/ioctl.h>
31 #include <linux/types.h>
32 #include <linux/hiddev.h>
36 #include "libudev-private.h"
43 static int usb_switch_csr(struct usb_dev_handle *dev, enum mode mode)
47 err = usb_control_msg(dev,
48 USB_ENDPOINT_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
49 0, mode, 0, NULL, 0, 10000);
54 if (errno == ETIMEDOUT)
60 static int hid_logitech_send_report(int fd, const char *buf, size_t size)
62 struct hiddev_report_info rinfo;
63 struct hiddev_usage_ref uref;
67 for (i = 0; i < size; i++) {
68 memset(&uref, 0, sizeof(uref));
69 uref.report_type = HID_REPORT_TYPE_OUTPUT;
70 uref.report_id = 0x10;
73 uref.usage_code = 0xff000001;
74 uref.value = buf[i] & 0x000000ff;
75 err = ioctl(fd, HIDIOCSUSAGE, &uref);
80 memset(&rinfo, 0, sizeof(rinfo));
81 rinfo.report_type = HID_REPORT_TYPE_OUTPUT;
82 rinfo.report_id = 0x10;
84 err = ioctl(fd, HIDIOCSREPORT, &rinfo);
89 static int hid_switch_logitech(const char *filename)
91 char rep1[] = { 0xff, 0x80, 0x80, 0x01, 0x00, 0x00 };
92 char rep2[] = { 0xff, 0x80, 0x00, 0x00, 0x30, 0x00 };
93 char rep3[] = { 0xff, 0x81, 0x80, 0x00, 0x00, 0x00 };
97 fd = open(filename, O_RDWR);
101 err = ioctl(fd, HIDIOCINITREPORT, 0);
105 err = hid_logitech_send_report(fd, rep1, sizeof(rep1));
109 err = hid_logitech_send_report(fd, rep2, sizeof(rep2));
113 err = hid_logitech_send_report(fd, rep3, sizeof(rep3));
119 static int usb_switch_dell(struct usb_dev_handle *dev, enum mode mode)
121 char report[] = { 0x7f, 0x00, 0x00, 0x00 };
133 /* Don't need to check return, as might not be in use */
134 usb_detach_kernel_driver_np(dev, 0);
136 if (usb_claim_interface(dev, 0) < 0)
139 err = usb_control_msg(dev,
140 USB_ENDPOINT_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
141 USB_REQ_SET_CONFIGURATION, 0x7f | (0x03 << 8), 0,
142 report, sizeof(report), 5000);
148 if (errno == ETIMEDOUT)
155 * The braindead libusb needs to scan and open all devices, just to
156 * to find the device we already have. This needs to be fixed in libusb
157 * or it will be ripped out and we carry our own code.
159 static struct usb_device *usb_device_open_from_udev(struct udev_device *usb_dev)
166 str = udev_device_get_sysattr_value(usb_dev, "busnum");
169 busnum = strtol(str, NULL, 0);
171 str = udev_device_get_sysattr_value(usb_dev, "devnum");
174 devnum = strtol(str, NULL, 0);
180 for (bus = usb_get_busses(); bus; bus = bus->next) {
181 struct usb_device *dev;
183 if (strtol(bus->dirname, NULL, 10) != busnum)
186 for (dev = bus->devices; dev; dev = dev->next) {
187 if (dev->devnum == devnum)
195 static struct usb_dev_handle *find_device(struct udev_device *udev_dev)
197 struct usb_device *dev;
199 dev = usb_device_open_from_udev(udev_dev);
202 return usb_open(dev);
205 static void usage(const char *error)
208 fprintf(stderr,"\n%s\n", error);
210 printf("hid2hci - Bluetooth HID to HCI mode switching utility\n\n");
212 printf("Usage: hid2hci [options]\n"
213 " --mode= mode to switch to [hid|hci] (default hci)\n"
214 " --devpath= sys device path\n"
215 " --method= method to use to switch [csr|logitech-hid|dell]\n"
219 int main(int argc, char *argv[])
221 static const struct option options[] = {
222 { "help", no_argument, NULL, 'h' },
223 { "mode", required_argument, NULL, 'm' },
224 { "devpath", required_argument, NULL, 'p' },
225 { "method", required_argument, NULL, 'M' },
233 } method = METHOD_UNDEF;
235 struct udev_device *udev_dev = NULL;
236 char syspath[UTIL_PATH_SIZE];
237 int (*usb_switch)(struct usb_dev_handle *dev, enum mode mode) = NULL;
238 enum mode mode = HCI;
239 const char *devpath = NULL;
246 option = getopt_long(argc, argv, "m:p:M:qh", options, NULL);
252 if (!strcmp(optarg, "hid")) {
254 } else if (!strcmp(optarg, "hci")) {
257 usage("error: undefined radio mode\n");
265 if (!strcmp(optarg, "csr")) {
267 usb_switch = usb_switch_csr;
268 } else if (!strcmp(optarg, "logitech-hid")) {
269 method = METHOD_LOGITECH_HID;
270 } else if (!strcmp(optarg, "dell")) {
271 method = METHOD_DELL;
272 usb_switch = usb_switch_dell;
274 usage("error: undefined switching method\n");
285 if (!devpath || method == METHOD_UNDEF) {
286 usage("error: --devpath= and --method= must be defined\n");
294 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
295 udev_dev = udev_device_new_from_syspath(udev, syspath);
296 if (udev_dev == NULL) {
297 fprintf(stderr, "error: could not find '%s'\n", devpath);
304 struct udev_device *dev;
305 struct usb_dev_handle *handle;
308 /* get the parent usb_device if needed */
310 type = udev_device_get_devtype(dev);
311 if (type == NULL || strcmp(type, "usb_device") != 0) {
312 dev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_device");
314 fprintf(stderr, "error: could not find usb_device for '%s'\n", devpath);
319 handle = find_device(dev);
320 if (handle == NULL) {
321 fprintf(stderr, "error: unable to handle '%s'\n",
322 udev_device_get_syspath(dev));
325 err = usb_switch(handle, mode);
328 case METHOD_LOGITECH_HID: {
331 device = udev_device_get_devnode(udev_dev);
332 if (device == NULL) {
333 fprintf(stderr, "error: could not find hiddev device node\n");
336 err = hid_switch_logitech(device);
344 fprintf(stderr, "error: switching device '%s' failed.\n",
345 udev_device_get_syspath(udev_dev));
347 udev_device_unref(udev_dev);