| 1 | #include <stdio.h> |
| 2 | //#include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <stdint.h> |
| 5 | //#include <pthread.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <fcntl.h> |
| 9 | #include <sys/ioctl.h> |
| 10 | #include <sys/select.h> |
| 11 | #include <unistd.h> |
| 12 | #include <dirent.h> |
| 13 | #include <errno.h> |
| 14 | #include <linux/usbdevice_fs.h> |
| 15 | #include <linux/usb/ch9.h> |
| 16 | |
| 17 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 18 | |
| 19 | #if 0 |
| 20 | #include "rawhid/hid.h" |
| 21 | |
| 22 | static int g_quit; |
| 23 | |
| 24 | static void *dbg_reader(void *arg) |
| 25 | { |
| 26 | char buf[65]; |
| 27 | int ret; |
| 28 | |
| 29 | buf[64] = 0; |
| 30 | |
| 31 | while (!g_quit) { |
| 32 | ret = rawhid_recv(0, buf, 64, 1000); |
| 33 | if (ret == 0) |
| 34 | continue; |
| 35 | |
| 36 | if (ret != 64) { |
| 37 | printf("\nrawhid_recv(dbg): %d\n", ret); |
| 38 | return NULL; |
| 39 | } |
| 40 | printf("%s", buf); |
| 41 | } |
| 42 | |
| 43 | // rawhid_close(0); |
| 44 | return NULL; |
| 45 | } |
| 46 | #endif |
| 47 | |
| 48 | struct teensy_dev { |
| 49 | int fd; |
| 50 | struct { |
| 51 | int ep_in; |
| 52 | int ep_out; |
| 53 | } ifaces[2]; |
| 54 | }; |
| 55 | |
| 56 | /* return 1 if founf, 0 if not, < 0 on error */ |
| 57 | static int find_device(struct teensy_dev *dev, |
| 58 | uint16_t vendor, uint16_t product) |
| 59 | { |
| 60 | const char path_root[] = "/dev/bus/usb"; |
| 61 | union { |
| 62 | struct usb_descriptor_header hdr; |
| 63 | struct usb_device_descriptor d; |
| 64 | struct usb_config_descriptor c; |
| 65 | struct usb_interface_descriptor i; |
| 66 | struct usb_endpoint_descriptor e; |
| 67 | char space[0x100]; /* enough? */ |
| 68 | } desc; |
| 69 | char path_bus[256], path_dev[256]; |
| 70 | struct dirent *ent, *ent_bus; |
| 71 | DIR *dir = NULL, *dir_bus = NULL; |
| 72 | int num, fd = -1; |
| 73 | int iface = -1; |
| 74 | int retval = -1; |
| 75 | int ret; |
| 76 | |
| 77 | memset(dev, 0xff, sizeof(*dev)); |
| 78 | |
| 79 | dir = opendir(path_root); |
| 80 | if (dir == NULL) { |
| 81 | perror("opendir"); |
| 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) { |
| 86 | /* should be a number like 000 */ |
| 87 | if (sscanf(ent->d_name, "%03d", &num) != 1) |
| 88 | continue; |
| 89 | |
| 90 | snprintf(path_bus, sizeof(path_bus), "%s/%s", |
| 91 | path_root, ent->d_name); |
| 92 | |
| 93 | dir_bus = opendir(path_bus); |
| 94 | if (dir_bus == NULL) |
| 95 | continue; |
| 96 | |
| 97 | ent_bus = readdir(dir_bus); |
| 98 | for (; ent_bus != NULL; ent_bus = readdir(dir_bus)) { |
| 99 | if (sscanf(ent->d_name, "%03d", &num) != 1) |
| 100 | continue; |
| 101 | |
| 102 | snprintf(path_dev, sizeof(path_dev), "%s/%s/%s", |
| 103 | path_root, ent->d_name, ent_bus->d_name); |
| 104 | |
| 105 | fd = open(path_dev, O_RDWR); |
| 106 | if (fd == -1) |
| 107 | continue; |
| 108 | |
| 109 | ret = read(fd, &desc.d, sizeof(desc.d)); |
| 110 | if (ret != sizeof(desc.d)) { |
| 111 | fprintf(stderr, "desc read: %d/%zd: ", ret, sizeof(desc.d)); |
| 112 | perror(""); |
| 113 | goto next; |
| 114 | } |
| 115 | |
| 116 | if (desc.d.bDescriptorType != USB_DT_DEVICE) { |
| 117 | fprintf(stderr, "%s: bad DT: 0x%02x\n", |
| 118 | path_dev, desc.d.bDescriptorType); |
| 119 | goto next; |
| 120 | } |
| 121 | |
| 122 | if (desc.d.idVendor == vendor && desc.d.idProduct == product) |
| 123 | goto found; |
| 124 | |
| 125 | next: |
| 126 | close(fd); |
| 127 | fd = -1; |
| 128 | } |
| 129 | |
| 130 | closedir(dir_bus); |
| 131 | dir_bus = NULL; |
| 132 | } |
| 133 | |
| 134 | /* not found */ |
| 135 | retval = 0; |
| 136 | goto out; |
| 137 | |
| 138 | found: |
| 139 | if (desc.d.bNumConfigurations != 1) { |
| 140 | fprintf(stderr, "unexpected bNumConfigurations: %u\n", |
| 141 | desc.d.bNumConfigurations); |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | /* walk through all descriptors */ |
| 146 | while (1) |
| 147 | { |
| 148 | ret = read(fd, &desc.hdr, sizeof(desc.hdr)); |
| 149 | if (ret == 0) |
| 150 | break; |
| 151 | if (ret != sizeof(desc.hdr)) { |
| 152 | fprintf(stderr, "desc.hdr read: %d/%zd: ", ret, sizeof(desc.hdr)); |
| 153 | perror(""); |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | ret = (int)lseek(fd, -sizeof(desc.hdr), SEEK_CUR); |
| 158 | if (ret == -1) { |
| 159 | perror("lseek"); |
| 160 | break; |
| 161 | } |
| 162 | |
| 163 | ret = read(fd, &desc, desc.hdr.bLength); |
| 164 | if (ret != desc.hdr.bLength) { |
| 165 | fprintf(stderr, "desc read: %d/%u: ", ret, desc.hdr.bLength); |
| 166 | perror(""); |
| 167 | break; |
| 168 | } |
| 169 | |
| 170 | switch (desc.hdr.bDescriptorType) { |
| 171 | case USB_DT_CONFIG: |
| 172 | if (desc.c.bNumInterfaces != 2) { |
| 173 | fprintf(stderr, "unexpected bNumInterfaces: %u\n", |
| 174 | desc.c.bNumInterfaces); |
| 175 | goto out; |
| 176 | } |
| 177 | break; |
| 178 | |
| 179 | case USB_DT_INTERFACE: |
| 180 | if (desc.i.bInterfaceClass != USB_CLASS_HID |
| 181 | || desc.i.bInterfaceSubClass != 0 |
| 182 | || desc.i.bInterfaceProtocol != 0) { |
| 183 | fprintf(stderr, "unexpected interface %x:%x:%x\n", |
| 184 | desc.i.bInterfaceClass, desc.i.bInterfaceSubClass, |
| 185 | desc.i.bInterfaceProtocol); |
| 186 | goto out; |
| 187 | } |
| 188 | if (desc.i.bNumEndpoints != 2) { |
| 189 | fprintf(stderr, "unexpected bNumEndpoints: %u\n", |
| 190 | desc.i.bNumEndpoints); |
| 191 | goto out; |
| 192 | } |
| 193 | iface++; |
| 194 | break; |
| 195 | |
| 196 | case USB_DT_ENDPOINT: |
| 197 | if (iface < 0 || iface >= ARRAY_SIZE(dev->ifaces)) { |
| 198 | fprintf(stderr, "bad iface: %d\n", iface); |
| 199 | goto out; |
| 200 | } |
| 201 | if (desc.e.wMaxPacketSize != 64 && desc.e.wMaxPacketSize != 32) { |
| 202 | fprintf(stderr, "iface %d, EP %02x: " |
| 203 | "unexpected wMaxPacketSize: %u\n", |
| 204 | iface, desc.e.bEndpointAddress, desc.e.wMaxPacketSize); |
| 205 | goto out; |
| 206 | } |
| 207 | if (desc.e.bEndpointAddress & 0x80) |
| 208 | dev->ifaces[iface].ep_in = desc.e.bEndpointAddress; // & 0x7F; |
| 209 | else |
| 210 | dev->ifaces[iface].ep_out = desc.e.bEndpointAddress; |
| 211 | break; |
| 212 | |
| 213 | case 0x21: |
| 214 | /* ignore */ |
| 215 | break; |
| 216 | |
| 217 | default: |
| 218 | fprintf(stderr, "skipping desc 0x%02x\n", |
| 219 | desc.hdr.bDescriptorType); |
| 220 | break; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* claim interfaces */ |
| 225 | for (iface = 0; iface < ARRAY_SIZE(dev->ifaces); iface++) { |
| 226 | struct usbdevfs_ioctl usbio; |
| 227 | |
| 228 | if (dev->ifaces[iface].ep_in == -1) { |
| 229 | fprintf(stderr, "missing ep_in, iface: %d\n", iface); |
| 230 | goto out; |
| 231 | } |
| 232 | if (dev->ifaces[iface].ep_out == -1) { |
| 233 | fprintf(stderr, "missing ep_out, iface: %d\n", iface); |
| 234 | goto out; |
| 235 | } |
| 236 | |
| 237 | /* disconnect default driver */ |
| 238 | memset(&usbio, 0, sizeof(usbio)); |
| 239 | usbio.ifno = iface; |
| 240 | usbio.ioctl_code = USBDEVFS_DISCONNECT; |
| 241 | ret = ioctl(fd, USBDEVFS_IOCTL, &usbio); |
| 242 | if (ret != 0 && errno != ENODATA) |
| 243 | perror("USBDEVFS_DISCONNECT"); |
| 244 | |
| 245 | ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &iface); |
| 246 | if (ret != 0) |
| 247 | perror("USBDEVFS_CLAIMINTERFACE"); |
| 248 | } |
| 249 | |
| 250 | dev->fd = fd; |
| 251 | fd = -1; |
| 252 | retval = 1; |
| 253 | |
| 254 | out: |
| 255 | if (fd != -1) |
| 256 | close(fd); |
| 257 | if (dir_bus != NULL) |
| 258 | closedir(dir_bus); |
| 259 | if (dir != NULL) |
| 260 | closedir(dir); |
| 261 | |
| 262 | return retval; |
| 263 | } |
| 264 | |
| 265 | enum my_urbs { |
| 266 | URB_DATA_IN, |
| 267 | URB_DATA_OUT, |
| 268 | URB_DBG_IN, |
| 269 | URB_CNT |
| 270 | }; |
| 271 | |
| 272 | int main(int argc, char *argv[]) |
| 273 | { |
| 274 | struct teensy_dev dev; |
| 275 | struct usbdevfs_urb urb[URB_CNT]; |
| 276 | struct usbdevfs_urb *reaped_urb; |
| 277 | char buf_dbg[64 + 1], buf_in[64]; |
| 278 | int wait_device = 0; |
| 279 | int dbg_in_sent = 0; |
| 280 | int data_in_sent = 0; |
| 281 | fd_set wfds; |
| 282 | int ret; |
| 283 | |
| 284 | dev.fd = -1; |
| 285 | |
| 286 | while (1) |
| 287 | { |
| 288 | if (dev.fd == -1) { |
| 289 | ret = find_device(&dev, 0x16C0, 0x0486); |
| 290 | if (ret < 0) |
| 291 | return ret; |
| 292 | |
| 293 | if (ret == 0) { |
| 294 | if (!wait_device) { |
| 295 | printf("waiting for device..\n"); |
| 296 | wait_device = 1; |
| 297 | } |
| 298 | usleep(250000); |
| 299 | continue; |
| 300 | } |
| 301 | |
| 302 | wait_device = 0; |
| 303 | data_in_sent = 0; |
| 304 | dbg_in_sent = 0; |
| 305 | } |
| 306 | |
| 307 | if (!data_in_sent) { |
| 308 | memset(&urb[URB_DATA_IN], 0, sizeof(urb[URB_DATA_IN])); |
| 309 | urb[URB_DATA_IN].type = USBDEVFS_URB_TYPE_INTERRUPT; |
| 310 | urb[URB_DATA_IN].endpoint = dev.ifaces[0].ep_in; |
| 311 | urb[URB_DATA_IN].buffer = buf_in; |
| 312 | urb[URB_DATA_IN].buffer_length = sizeof(buf_in); |
| 313 | |
| 314 | ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DATA_IN]); |
| 315 | if (ret != 0) { |
| 316 | perror("USBDEVFS_SUBMITURB URB_DATA_IN"); |
| 317 | return 1; |
| 318 | } |
| 319 | data_in_sent = 1; |
| 320 | } |
| 321 | if (!dbg_in_sent) { |
| 322 | memset(&urb[URB_DBG_IN], 0, sizeof(urb[URB_DBG_IN])); |
| 323 | urb[URB_DBG_IN].type = USBDEVFS_URB_TYPE_INTERRUPT; |
| 324 | urb[URB_DBG_IN].endpoint = dev.ifaces[1].ep_in; |
| 325 | urb[URB_DBG_IN].buffer = buf_dbg; |
| 326 | urb[URB_DBG_IN].buffer_length = sizeof(buf_dbg) - 1; |
| 327 | |
| 328 | ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DBG_IN]); |
| 329 | if (ret != 0) { |
| 330 | perror("USBDEVFS_SUBMITURB URB_DBG_IN"); |
| 331 | return 1; |
| 332 | } |
| 333 | dbg_in_sent = 1; |
| 334 | } |
| 335 | |
| 336 | FD_ZERO(&wfds); |
| 337 | FD_SET(dev.fd, &wfds); |
| 338 | |
| 339 | ret = select(dev.fd + 1, NULL, &wfds, NULL, NULL); |
| 340 | if (ret < 0) { |
| 341 | perror("select"); |
| 342 | return 1; |
| 343 | } |
| 344 | |
| 345 | if (FD_ISSET(dev.fd, &wfds)) { |
| 346 | reaped_urb = NULL; |
| 347 | ret = ioctl(dev.fd, USBDEVFS_REAPURB, &reaped_urb); |
| 348 | if (ret != 0) { |
| 349 | if (errno == ENODEV) |
| 350 | goto dev_close; |
| 351 | perror("USBDEVFS_REAPURB"); |
| 352 | return 1; |
| 353 | } |
| 354 | |
| 355 | if (reaped_urb != NULL && reaped_urb->status != 0) { |
| 356 | errno = -reaped_urb->status; |
| 357 | perror("urb status"); |
| 358 | if (reaped_urb->status == -EILSEQ) { |
| 359 | /* this is usually a sign of disconnect.. */ |
| 360 | usleep(250000); |
| 361 | goto dev_close; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | if (reaped_urb == &urb[URB_DATA_IN]) { |
| 366 | printf("*data*\n"); |
| 367 | data_in_sent = 0; |
| 368 | } |
| 369 | else if (reaped_urb == &urb[URB_DBG_IN]) { |
| 370 | /* debug text */ |
| 371 | buf_dbg[reaped_urb->actual_length] = 0; |
| 372 | printf("%s", buf_dbg); |
| 373 | dbg_in_sent = 0; |
| 374 | } |
| 375 | else { |
| 376 | fprintf(stderr, "reaped unknown urb? %p\n", reaped_urb); |
| 377 | } |
| 378 | } |
| 379 | continue; |
| 380 | |
| 381 | dev_close: |
| 382 | close(dev.fd); |
| 383 | dev.fd = -1; |
| 384 | } |
| 385 | |
| 386 | #if 0 |
| 387 | ret = rawhid_open(1, 0x16C0, 0x0486, 0xFFC9, 0x0004); |
| 388 | if (ret <= 0) { |
| 389 | fprintf(stderr, "dbg rawhid is missing\n"); |
| 390 | return 1; |
| 391 | } |
| 392 | |
| 393 | ret = rawhid_open(1, 0x16C0, 0x0486, 0xFFAB, 0x0200); |
| 394 | if (ret <= 0) { |
| 395 | fprintf(stderr, "data rawhid is missing\n"); |
| 396 | return 1; |
| 397 | } |
| 398 | |
| 399 | pthread_t thread; |
| 400 | ret = pthread_create(&thread, NULL, dbg_reader, NULL); |
| 401 | if (ret) { |
| 402 | fprintf(stderr, "pthread_create failed: %d\n", ret); |
| 403 | return 1; |
| 404 | } |
| 405 | |
| 406 | memset(buf, 0, sizeof(buf)); |
| 407 | snprintf(buf, sizeof(buf), "hi"); |
| 408 | |
| 409 | ret = rawhid_send(1, buf, 64, 220); |
| 410 | if (ret != 64) { |
| 411 | fprintf(stderr, "send failed: %d\n", ret); |
| 412 | } |
| 413 | |
| 414 | while (1) { |
| 415 | // check if any Raw HID packet has arrived |
| 416 | ret = rawhid_recv(1, buf, 64, 220); |
| 417 | if (ret < 0) { |
| 418 | fprintf(stderr, "\nrawhid_recv(1): %d\n", ret); |
| 419 | break; |
| 420 | } |
| 421 | if (ret > 0) { |
| 422 | printf("\nrecv %d bytes:\n", ret); |
| 423 | for (i=0; i<ret; i++) { |
| 424 | printf("%02X ", buf[i] & 255); |
| 425 | if (i % 16 == 15 && i < ret-1) printf("\n"); |
| 426 | } |
| 427 | printf("\n"); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | // rawhid_close(1); |
| 432 | |
| 433 | g_quit = 1; |
| 434 | pthread_join(thread, NULL); |
| 435 | #endif |
| 436 | |
| 437 | return 0; |
| 438 | } |
| 439 | |
| 440 | // vim: ts=2:sw=2:expandtab |