extras/hid2hci/hid2hci.c

   1 /*
   2  *
   3  *  hid2hci : a tool for switching the radio on devices that support
   4  *                      it from HID to HCI and back
   5  *
   6  *  Copyright (C) 2003-2009  Marcel Holtmann <marcel@holtmann.org>
   7  *  Copyright (C) 2008-2009  Mario Limonciello <mario_limonciello@dell.com>
   8  *
   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.
  13  *
  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.
  18  *
  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
  22  *
  23  */
  24
  25 #include <stdio.h>
  26 #include <errno.h>
  27 #include <fcntl.h>
  28 #include <stdint.h>
  29 #include <string.h>
  30 #include <getopt.h>
  31 #include <sys/ioctl.h>
  32 #include <linux/hiddev.h>
  33 #include <usb.h>
  34
  35 static char devpath[PATH_MAX + 1] = "/dev";
  36
  37 #define HCI 0
  38 #define HID 1
  39
  40 struct device_info {
  41         struct usb_device *dev;
  42         int mode;
  43         uint16_t vendor;
  44         uint16_t product;
  45 };
  46
  47 static int switch_csr(struct device_info *devinfo)
  48 {
  49         struct usb_dev_handle *udev;
  50         int err;
  51
  52         udev = usb_open(devinfo->dev);
  53         if (!udev)
  54                 return -errno;
  55
  56         err = usb_control_msg(udev,
  57                               USB_ENDPOINT_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  58                               0, devinfo->mode, 0, NULL, 0, 10000);
  59
  60         if (err == 0) {
  61                 err = -1;
  62                 errno = EALREADY;
  63         } else {
  64                 if (errno == ETIMEDOUT)
  65                         err = 0;
  66         }
  67
  68         usb_close(udev);
  69
  70         return err;
  71 }
  72
  73 static int send_report(int fd, const char *buf, size_t size)
  74 {
  75         struct hiddev_report_info rinfo;
  76         struct hiddev_usage_ref uref;
  77         unsigned int i;
  78         int err;
  79
  80         for (i = 0; i < size; i++) {
  81                 memset(&uref, 0, sizeof(uref));
  82                 uref.report_type = HID_REPORT_TYPE_OUTPUT;
  83                 uref.report_id   = 0x10;
  84                 uref.field_index = 0;
  85                 uref.usage_index = i;
  86                 uref.usage_code  = 0xff000001;
  87                 uref.value       = buf[i] & 0x000000ff;
  88                 err = ioctl(fd, HIDIOCSUSAGE, &uref);
  89                 if (err < 0)
  90                         return err;
  91         }
  92
  93         memset(&rinfo, 0, sizeof(rinfo));
  94         rinfo.report_type = HID_REPORT_TYPE_OUTPUT;
  95         rinfo.report_id   = 0x10;
  96         rinfo.num_fields  = 1;
  97         err = ioctl(fd, HIDIOCSREPORT, &rinfo);
  98
  99         return err;
 100 }
 101
 102 static int switch_logitech(struct device_info *devinfo)
 103 {
 104         char devname[PATH_MAX + 1];
 105         int i, fd, err = -1;
 106
 107         for (i = 0; i < 16; i++) {
 108                 struct hiddev_devinfo dinfo;
 109                 char rep1[] = { 0xff, 0x80, 0x80, 0x01, 0x00, 0x00 };
 110                 char rep2[] = { 0xff, 0x80, 0x00, 0x00, 0x30, 0x00 };
 111                 char rep3[] = { 0xff, 0x81, 0x80, 0x00, 0x00, 0x00 };
 112
 113                 sprintf(devname, "%s/hiddev%d", devpath, i);
 114                 fd = open(devname, O_RDWR);
 115                 if (fd < 0) {
 116                         sprintf(devname, "%s/usb/hiddev%d", devpath, i);
 117                         fd = open(devname, O_RDWR);
 118                         if (fd < 0) {
 119                                 sprintf(devname, "%s/usb/hid/hiddev%d", devpath, i);
 120                                 fd = open(devname, O_RDWR);
 121                                 if (fd < 0)
 122                                         continue;
 123                         }
 124                 }
 125
 126                 memset(&dinfo, 0, sizeof(dinfo));
 127                 err = ioctl(fd, HIDIOCGDEVINFO, &dinfo);
 128                 if (err < 0 || (int) dinfo.busnum != atoi(devinfo->dev->bus->dirname) ||
 129                                 (int) dinfo.devnum != atoi(devinfo->dev->filename)) {
 130                         close(fd);
 131                         continue;
 132                 }
 133
 134                 err = ioctl(fd, HIDIOCINITREPORT, 0);
 135                 if (err < 0) {
 136                         close(fd);
 137                         break;
 138                 }
 139
 140                 err = send_report(fd, rep1, sizeof(rep1));
 141                 if (err < 0) {
 142                         close(fd);
 143                         break;
 144                 }
 145
 146                 err = send_report(fd, rep2, sizeof(rep2));
 147                 if (err < 0) {
 148                         close(fd);
 149                         break;
 150                 }
 151
 152                 err = send_report(fd, rep3, sizeof(rep3));
 153                 close(fd);
 154                 break;
 155         }
 156
 157         return err;
 158 }
 159
 160 static int switch_dell(struct device_info *devinfo)
 161 {
 162         char report[] = { 0x7f, 0x00, 0x00, 0x00 };
 163
 164         struct usb_dev_handle *handle;
 165         int err;
 166
 167         switch (devinfo->mode) {
 168         case HCI:
 169                 report[1] = 0x13;
 170                 break;
 171         case HID:
 172                 report[1] = 0x14;
 173                 break;
 174         }
 175
 176         handle = usb_open(devinfo->dev);
 177         if (!handle)
 178                 return -EIO;
 179
 180         /* Don't need to check return, as might not be in use */
 181         usb_detach_kernel_driver_np(handle, 0);
 182
 183         if (usb_claim_interface(handle, 0) < 0) {
 184                 usb_close(handle);
 185                 return -EIO;
 186         }
 187
 188         err = usb_control_msg(handle,
 189                 USB_ENDPOINT_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 190                         USB_REQ_SET_CONFIGURATION, 0x7f | (0x03 << 8), 0,
 191                                                 report, sizeof(report), 5000);
 192
 193         if (err == 0) {
 194                 err = -1;
 195                 errno = EALREADY;
 196         } else {
 197                 if (errno == ETIMEDOUT)
 198                         err = 0;
 199         }
 200
 201         usb_close(handle);
 202
 203         return err;
 204 }
 205
 206 static int find_device(struct device_info* devinfo)
 207 {
 208         struct usb_bus *bus;
 209         struct usb_device *dev;
 210
 211         usb_find_busses();
 212         usb_find_devices();
 213
 214         for (bus = usb_get_busses(); bus; bus = bus->next)
 215                 for (dev = bus->devices; dev; dev = dev->next) {
 216                         if (dev->descriptor.idVendor == devinfo->vendor &&
 217                             dev->descriptor.idProduct == devinfo->product) {
 218                                 devinfo->dev=dev;
 219                                 return 1;
 220                         }
 221                 }
 222         return 0;
 223 }
 224
 225 static int find_resuscitated_device(struct device_info* devinfo, uint8_t bInterfaceProtocol)
 226 {
 227         int i,j,k,l;
 228         struct usb_device *dev, *child;
 229         struct usb_config_descriptor config;
 230         struct usb_interface interface;
 231         struct usb_interface_descriptor altsetting;
 232
 233         /* Using the base device, attempt to find the child with the
 234          * matching bInterfaceProtocol */
 235         dev = devinfo->dev;
 236         for (i = 0; i < dev->num_children; i++) {
 237                 child = dev->children[i];
 238                 for (j = 0; j < child->descriptor.bNumConfigurations; j++) {
 239                         config = child->config[j];
 240                         for (k = 0; k < config.bNumInterfaces; k++) {
 241                                 interface = config.interface[k];
 242                                 for (l = 0; l < interface.num_altsetting; l++) {
 243                                         altsetting = interface.altsetting[l];
 244                                         if (altsetting.bInterfaceProtocol == bInterfaceProtocol) {
 245                                                 devinfo->dev = child;
 246                                                 return 1;
 247                                         }
 248                                 }
 249                         }
 250                 }
 251         }
 252         return 0;
 253 }
 254
 255 static void usage(char* error)
 256 {
 257         if (error)
 258                 fprintf(stderr,"\n%s\n", error);
 259         else
 260                 printf("hid2hci - Bluetooth HID to HCI mode switching utility\n\n");
 261
 262         printf("Usage:\n"
 263                 "\thid2hci [options]\n"
 264                 "\n");
 265
 266         printf("Options:\n"
 267                 "\t-h, --help           Display help\n"
 268                 "\t-q, --quiet          Don't display any messages\n"
 269                 "\t-r, --mode=          Mode to switch to [hid, hci]\n"
 270                 "\t-v, --vendor=        Vendor ID to act upon\n"
 271                 "\t-p, --product=       Product ID to act upon\n"
 272                 "\t-m, --method=        Method to use to switch [csr, logitech, dell]\n"
 273                 "\t-s, --resuscitate=   Find the child device with this bInterfaceProtocol to run on \n"
 274                 "\n");
 275         if (error)
 276                 exit(1);
 277 }
 278
 279 int main(int argc, char *argv[])
 280 {
 281         static const struct option options[] = {
 282                 { "help", no_argument, NULL, 'h' },
 283                 { "quiet", no_argument, NULL, 'q' },
 284                 { "mode", required_argument, NULL, 'r' },
 285                 { "vendor", required_argument, NULL, 'v' },
 286                 { "product", required_argument, NULL, 'p' },
 287                 { "method", required_argument, NULL, 'm' },
 288                 { "resuscitate", required_argument, NULL, 's' },
 289                 { }
 290         };
 291         struct device_info dev = { NULL, HCI, 0, 0 };
 292         int opt, quiet = 0;
 293         int (*method)(struct device_info *dev) = NULL;
 294         uint8_t resuscitate = 0;
 295
 296         while ((opt = getopt_long(argc, argv, "+s:r:v:p:m:qh", options, NULL)) != -1) {
 297                 switch (opt) {
 298                 case 'r':
 299                         if (optarg && !strcmp(optarg, "hid"))
 300                                 dev.mode = HID;
 301                         else if (optarg && !strcmp(optarg, "hci"))
 302                                 dev.mode = HCI;
 303                         else
 304                                 usage("ERROR: Undefined radio mode\n");
 305                         break;
 306                 case 'v':
 307                         sscanf(optarg, "%4hx", &dev.vendor);
 308                         break;
 309                 case 'p':
 310                         sscanf(optarg, "%4hx", &dev.product);
 311                         break;
 312                 case 'm':
 313                         if (optarg && !strcmp(optarg, "csr"))
 314                                 method = switch_csr;
 315                         else if (optarg && !strcmp(optarg, "logitech"))
 316                                 method = switch_logitech;
 317                         else if (optarg && !strcmp(optarg, "dell"))
 318                                 method = switch_dell;
 319                         else
 320                                 usage("ERROR: Undefined switching method\n");
 321                         break;
 322                 case 'q':
 323                         quiet = 1;
 324                         break;
 325                 case 's':
 326                         sscanf(optarg, "%2hx", (short unsigned int*) &resuscitate);
 327                         break;
 328                 case 'h':
 329                         usage(NULL);
 330                 default:
 331                         exit(1);
 332                 }
 333         }
 334
 335         if (!quiet && (!dev.vendor || !dev.product || !method))
 336                 usage("ERROR: Vendor ID, Product ID, and Switching Method must all be defined.\n");
 337
 338         argc -= optind;
 339         argv += optind;
 340         optind = 0;
 341
 342         usb_init();
 343
 344         if (!find_device(&dev)) {
 345                 if (!quiet)
 346                         fprintf(stderr, "Device %04x:%04x not found on USB bus.\n",
 347                                 dev.vendor, dev.product);
 348                 exit(1);
 349         }
 350
 351         if (resuscitate && !find_resuscitated_device(&dev, resuscitate)) {
 352                 if (!quiet)
 353                         fprintf(stderr, "Device %04x:%04x was unable to resucitate any child devices.\n",
 354                                 dev.vendor,dev.product);
 355                 exit(1);
 356         }
 357
 358         if (!quiet)
 359                 printf("Attempting to switch device %04x:%04x to %s mode ",
 360                         dev.vendor, dev.product, dev.mode ? "HID" : "HCI");
 361         fflush(stdout);
 362
 363         if (method(&dev) < 0 && !quiet)
 364                 printf("failed (%s)\n", strerror(errno));
 365         else if (!quiet)
 366                 printf("was successful\n");
 367
 368         return errno;
 369 }