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1 | #include <stdio.h> |
932302ef |
2 | #include <string.h> |
3 | #include <stdint.h> |
932302ef |
4 | #include <sys/types.h> |
5 | #include <sys/stat.h> |
6 | #include <fcntl.h> |
7 | #include <sys/ioctl.h> |
8 | #include <sys/select.h> |
9 | #include <unistd.h> |
10 | #include <dirent.h> |
11 | #include <errno.h> |
12 | #include <linux/usbdevice_fs.h> |
13 | #include <linux/usb/ch9.h> |
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14 | #include <linux/input.h> |
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15 | |
16 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
17 | |
932302ef |
18 | struct teensy_dev { |
19 | int fd; |
20 | struct { |
21 | int ep_in; |
22 | int ep_out; |
23 | } ifaces[2]; |
24 | }; |
25 | |
26 | /* return 1 if founf, 0 if not, < 0 on error */ |
27 | static int find_device(struct teensy_dev *dev, |
28 | uint16_t vendor, uint16_t product) |
29 | { |
30 | const char path_root[] = "/dev/bus/usb"; |
31 | union { |
32 | struct usb_descriptor_header hdr; |
33 | struct usb_device_descriptor d; |
34 | struct usb_config_descriptor c; |
35 | struct usb_interface_descriptor i; |
36 | struct usb_endpoint_descriptor e; |
37 | char space[0x100]; /* enough? */ |
38 | } desc; |
39 | char path_bus[256], path_dev[256]; |
40 | struct dirent *ent, *ent_bus; |
41 | DIR *dir = NULL, *dir_bus = NULL; |
42 | int num, fd = -1; |
43 | int iface = -1; |
44 | int retval = -1; |
45 | int ret; |
46 | |
47 | memset(dev, 0xff, sizeof(*dev)); |
48 | |
49 | dir = opendir(path_root); |
50 | if (dir == NULL) { |
51 | perror("opendir"); |
52 | return -1; |
53 | } |
54 | |
55 | for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) { |
56 | /* should be a number like 000 */ |
57 | if (sscanf(ent->d_name, "%03d", &num) != 1) |
58 | continue; |
59 | |
60 | snprintf(path_bus, sizeof(path_bus), "%s/%s", |
61 | path_root, ent->d_name); |
62 | |
63 | dir_bus = opendir(path_bus); |
64 | if (dir_bus == NULL) |
65 | continue; |
66 | |
67 | ent_bus = readdir(dir_bus); |
68 | for (; ent_bus != NULL; ent_bus = readdir(dir_bus)) { |
69 | if (sscanf(ent->d_name, "%03d", &num) != 1) |
70 | continue; |
71 | |
72 | snprintf(path_dev, sizeof(path_dev), "%s/%s/%s", |
73 | path_root, ent->d_name, ent_bus->d_name); |
74 | |
75 | fd = open(path_dev, O_RDWR); |
76 | if (fd == -1) |
77 | continue; |
78 | |
79 | ret = read(fd, &desc.d, sizeof(desc.d)); |
80 | if (ret != sizeof(desc.d)) { |
81 | fprintf(stderr, "desc read: %d/%zd: ", ret, sizeof(desc.d)); |
82 | perror(""); |
83 | goto next; |
84 | } |
85 | |
86 | if (desc.d.bDescriptorType != USB_DT_DEVICE) { |
87 | fprintf(stderr, "%s: bad DT: 0x%02x\n", |
88 | path_dev, desc.d.bDescriptorType); |
89 | goto next; |
90 | } |
91 | |
92 | if (desc.d.idVendor == vendor && desc.d.idProduct == product) |
93 | goto found; |
94 | |
95 | next: |
96 | close(fd); |
97 | fd = -1; |
98 | } |
99 | |
100 | closedir(dir_bus); |
101 | dir_bus = NULL; |
102 | } |
103 | |
104 | /* not found */ |
105 | retval = 0; |
106 | goto out; |
107 | |
108 | found: |
109 | if (desc.d.bNumConfigurations != 1) { |
110 | fprintf(stderr, "unexpected bNumConfigurations: %u\n", |
111 | desc.d.bNumConfigurations); |
112 | goto out; |
113 | } |
114 | |
115 | /* walk through all descriptors */ |
116 | while (1) |
117 | { |
118 | ret = read(fd, &desc.hdr, sizeof(desc.hdr)); |
119 | if (ret == 0) |
120 | break; |
121 | if (ret != sizeof(desc.hdr)) { |
122 | fprintf(stderr, "desc.hdr read: %d/%zd: ", ret, sizeof(desc.hdr)); |
123 | perror(""); |
124 | break; |
125 | } |
126 | |
127 | ret = (int)lseek(fd, -sizeof(desc.hdr), SEEK_CUR); |
128 | if (ret == -1) { |
129 | perror("lseek"); |
130 | break; |
131 | } |
132 | |
133 | ret = read(fd, &desc, desc.hdr.bLength); |
134 | if (ret != desc.hdr.bLength) { |
135 | fprintf(stderr, "desc read: %d/%u: ", ret, desc.hdr.bLength); |
136 | perror(""); |
137 | break; |
138 | } |
139 | |
140 | switch (desc.hdr.bDescriptorType) { |
141 | case USB_DT_CONFIG: |
142 | if (desc.c.bNumInterfaces != 2) { |
143 | fprintf(stderr, "unexpected bNumInterfaces: %u\n", |
144 | desc.c.bNumInterfaces); |
145 | goto out; |
146 | } |
147 | break; |
148 | |
149 | case USB_DT_INTERFACE: |
150 | if (desc.i.bInterfaceClass != USB_CLASS_HID |
151 | || desc.i.bInterfaceSubClass != 0 |
152 | || desc.i.bInterfaceProtocol != 0) { |
153 | fprintf(stderr, "unexpected interface %x:%x:%x\n", |
154 | desc.i.bInterfaceClass, desc.i.bInterfaceSubClass, |
155 | desc.i.bInterfaceProtocol); |
156 | goto out; |
157 | } |
158 | if (desc.i.bNumEndpoints != 2) { |
159 | fprintf(stderr, "unexpected bNumEndpoints: %u\n", |
160 | desc.i.bNumEndpoints); |
161 | goto out; |
162 | } |
163 | iface++; |
164 | break; |
165 | |
166 | case USB_DT_ENDPOINT: |
167 | if (iface < 0 || iface >= ARRAY_SIZE(dev->ifaces)) { |
168 | fprintf(stderr, "bad iface: %d\n", iface); |
169 | goto out; |
170 | } |
171 | if (desc.e.wMaxPacketSize != 64 && desc.e.wMaxPacketSize != 32) { |
172 | fprintf(stderr, "iface %d, EP %02x: " |
173 | "unexpected wMaxPacketSize: %u\n", |
174 | iface, desc.e.bEndpointAddress, desc.e.wMaxPacketSize); |
175 | goto out; |
176 | } |
177 | if (desc.e.bEndpointAddress & 0x80) |
178 | dev->ifaces[iface].ep_in = desc.e.bEndpointAddress; // & 0x7F; |
179 | else |
180 | dev->ifaces[iface].ep_out = desc.e.bEndpointAddress; |
181 | break; |
182 | |
183 | case 0x21: |
184 | /* ignore */ |
185 | break; |
186 | |
187 | default: |
188 | fprintf(stderr, "skipping desc 0x%02x\n", |
189 | desc.hdr.bDescriptorType); |
190 | break; |
191 | } |
192 | } |
193 | |
194 | /* claim interfaces */ |
195 | for (iface = 0; iface < ARRAY_SIZE(dev->ifaces); iface++) { |
196 | struct usbdevfs_ioctl usbio; |
197 | |
198 | if (dev->ifaces[iface].ep_in == -1) { |
199 | fprintf(stderr, "missing ep_in, iface: %d\n", iface); |
200 | goto out; |
201 | } |
202 | if (dev->ifaces[iface].ep_out == -1) { |
203 | fprintf(stderr, "missing ep_out, iface: %d\n", iface); |
204 | goto out; |
205 | } |
206 | |
207 | /* disconnect default driver */ |
208 | memset(&usbio, 0, sizeof(usbio)); |
209 | usbio.ifno = iface; |
210 | usbio.ioctl_code = USBDEVFS_DISCONNECT; |
211 | ret = ioctl(fd, USBDEVFS_IOCTL, &usbio); |
212 | if (ret != 0 && errno != ENODATA) |
213 | perror("USBDEVFS_DISCONNECT"); |
214 | |
215 | ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &iface); |
216 | if (ret != 0) |
217 | perror("USBDEVFS_CLAIMINTERFACE"); |
218 | } |
219 | |
220 | dev->fd = fd; |
221 | fd = -1; |
222 | retval = 1; |
223 | |
224 | out: |
225 | if (fd != -1) |
226 | close(fd); |
227 | if (dir_bus != NULL) |
228 | closedir(dir_bus); |
229 | if (dir != NULL) |
230 | closedir(dir); |
231 | |
232 | return retval; |
233 | } |
234 | |
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235 | /* ?0SA 00DU, ?1CB RLDU */ |
236 | #define STATE_BYTES 2 |
237 | |
238 | static uint8_t fixed_input_state[STATE_BYTES] = { 0x33, 0x3f }; |
239 | |
240 | enum mdbtn { |
241 | MDBTN_UP = 1, |
242 | MDBTN_DOWN, |
243 | MDBTN_LEFT, |
244 | MDBTN_RIGHT, |
245 | MDBTN_A, |
246 | MDBTN_B, |
247 | MDBTN_C, |
248 | MDBTN_START, |
249 | }; |
250 | |
251 | static const enum mdbtn evdev_md_map[KEY_CNT] = { |
252 | [KEY_UP] = MDBTN_UP, |
253 | [KEY_DOWN] = MDBTN_DOWN, |
254 | [KEY_LEFT] = MDBTN_LEFT, |
255 | [KEY_RIGHT] = MDBTN_RIGHT, |
256 | [KEY_HOME] = MDBTN_A, |
257 | [KEY_PAGEDOWN] = MDBTN_B, |
258 | [KEY_END] = MDBTN_C, |
259 | [KEY_LEFTALT] = MDBTN_START, |
260 | }; |
261 | |
262 | int do_evdev_input(int fd) |
263 | { |
264 | uint8_t old_state[STATE_BYTES]; |
265 | uint8_t changed_bits[STATE_BYTES] = { 0, }; |
266 | struct input_event ev; |
267 | enum mdbtn mdbtn; |
268 | int i, ret; |
269 | |
270 | ret = read(fd, &ev, sizeof(ev)); |
271 | if (ret != sizeof(ev)) { |
272 | fprintf(stderr, "evdev read %d/%zd: ", ret, sizeof(ev)); |
273 | perror(""); |
274 | return 0; |
275 | } |
276 | |
277 | if (ev.type != EV_KEY) |
278 | return 0; |
279 | |
280 | if (ev.value != 0 && ev.value != 1) |
281 | return 0; |
282 | |
283 | if ((uint32_t)ev.code >= ARRAY_SIZE(evdev_md_map)) { |
284 | fprintf(stderr, "evdev read bad key: %u\n", ev.code); |
285 | return 0; |
286 | } |
287 | |
288 | mdbtn = evdev_md_map[ev.code]; |
289 | if (mdbtn == 0) |
290 | return 0; |
291 | |
292 | memcpy(old_state, fixed_input_state, STATE_BYTES); |
293 | |
294 | /* ?0SA 00DU, ?1CB RLDU */ |
295 | switch (mdbtn) { |
296 | case MDBTN_UP: |
297 | changed_bits[0] = 0x01; |
298 | changed_bits[1] = 0x01; |
299 | break; |
300 | case MDBTN_DOWN: |
301 | changed_bits[0] = 0x02; |
302 | changed_bits[1] = 0x02; |
303 | break; |
304 | case MDBTN_LEFT: |
305 | changed_bits[0] = 0x00; |
306 | changed_bits[1] = 0x04; |
307 | break; |
308 | case MDBTN_RIGHT: |
309 | changed_bits[0] = 0x00; |
310 | changed_bits[1] = 0x08; |
311 | break; |
312 | case MDBTN_A: |
313 | changed_bits[0] = 0x10; |
314 | changed_bits[1] = 0x00; |
315 | break; |
316 | case MDBTN_B: |
317 | changed_bits[0] = 0x00; |
318 | changed_bits[1] = 0x10; |
319 | break; |
320 | case MDBTN_C: |
321 | changed_bits[0] = 0x00; |
322 | changed_bits[1] = 0x20; |
323 | break; |
324 | case MDBTN_START: |
325 | changed_bits[0] = 0x20; |
326 | changed_bits[1] = 0x00; |
327 | break; |
328 | } |
329 | |
330 | if (ev.value) { |
331 | // key press |
332 | for (i = 0; i < STATE_BYTES; i++) |
333 | fixed_input_state[i] &= ~changed_bits[i]; |
334 | } |
335 | else { |
336 | // key release |
337 | for (i = 0; i < STATE_BYTES; i++) |
338 | fixed_input_state[i] |= changed_bits[i]; |
339 | } |
340 | |
341 | return memcmp(old_state, fixed_input_state, STATE_BYTES) ? 1 : 0; |
342 | } |
343 | |
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344 | enum my_urbs { |
345 | URB_DATA_IN, |
346 | URB_DATA_OUT, |
347 | URB_DBG_IN, |
348 | URB_CNT |
349 | }; |
350 | |
351 | int main(int argc, char *argv[]) |
352 | { |
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353 | char buf_dbg[64 + 1], buf_in[64], buf_out[64]; |
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354 | struct teensy_dev dev; |
355 | struct usbdevfs_urb urb[URB_CNT]; |
356 | struct usbdevfs_urb *reaped_urb; |
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357 | int fixed_input_changed; |
358 | int evdev_fds[16]; |
359 | int evdev_fd_cnt = 0; |
360 | int evdev_support; |
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361 | int wait_device = 0; |
362 | int dbg_in_sent = 0; |
363 | int data_in_sent = 0; |
1cb2822f |
364 | fd_set rfds, wfds; |
365 | int i, ret; |
366 | int fd; |
367 | |
368 | for (i = 1; i < argc; i++) { |
369 | if (evdev_fd_cnt >= ARRAY_SIZE(evdev_fds)) { |
370 | fprintf(stderr, "too many evdevs\n"); |
371 | break; |
372 | } |
373 | fd = open(argv[i], O_RDONLY); |
374 | if (fd == -1) { |
375 | fprintf(stderr, "open %s: ", argv[i]); |
376 | perror(""); |
377 | continue; |
378 | } |
379 | evdev_support = 0; |
380 | ret = ioctl(fd, EVIOCGBIT(0, sizeof(evdev_support)), |
381 | &evdev_support); |
382 | if (ret < 0) |
383 | perror("EVIOCGBIT"); |
384 | if (!(evdev_support & (1 << EV_KEY))) { |
385 | fprintf(stderr, "%s doesn't have keys\n", argv[i]); |
386 | close(fd); |
387 | continue; |
388 | } |
389 | evdev_fds[evdev_fd_cnt++] = fd; |
390 | } |
932302ef |
391 | |
392 | dev.fd = -1; |
393 | |
394 | while (1) |
395 | { |
396 | if (dev.fd == -1) { |
397 | ret = find_device(&dev, 0x16C0, 0x0486); |
398 | if (ret < 0) |
399 | return ret; |
400 | |
401 | if (ret == 0) { |
402 | if (!wait_device) { |
403 | printf("waiting for device..\n"); |
404 | wait_device = 1; |
405 | } |
406 | usleep(250000); |
407 | continue; |
408 | } |
409 | |
410 | wait_device = 0; |
411 | data_in_sent = 0; |
412 | dbg_in_sent = 0; |
413 | } |
414 | |
415 | if (!data_in_sent) { |
416 | memset(&urb[URB_DATA_IN], 0, sizeof(urb[URB_DATA_IN])); |
417 | urb[URB_DATA_IN].type = USBDEVFS_URB_TYPE_INTERRUPT; |
418 | urb[URB_DATA_IN].endpoint = dev.ifaces[0].ep_in; |
419 | urb[URB_DATA_IN].buffer = buf_in; |
420 | urb[URB_DATA_IN].buffer_length = sizeof(buf_in); |
421 | |
422 | ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DATA_IN]); |
423 | if (ret != 0) { |
424 | perror("USBDEVFS_SUBMITURB URB_DATA_IN"); |
425 | return 1; |
426 | } |
427 | data_in_sent = 1; |
428 | } |
429 | if (!dbg_in_sent) { |
430 | memset(&urb[URB_DBG_IN], 0, sizeof(urb[URB_DBG_IN])); |
431 | urb[URB_DBG_IN].type = USBDEVFS_URB_TYPE_INTERRUPT; |
432 | urb[URB_DBG_IN].endpoint = dev.ifaces[1].ep_in; |
433 | urb[URB_DBG_IN].buffer = buf_dbg; |
434 | urb[URB_DBG_IN].buffer_length = sizeof(buf_dbg) - 1; |
435 | |
436 | ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DBG_IN]); |
437 | if (ret != 0) { |
438 | perror("USBDEVFS_SUBMITURB URB_DBG_IN"); |
439 | return 1; |
440 | } |
441 | dbg_in_sent = 1; |
442 | } |
443 | |
1cb2822f |
444 | FD_ZERO(&rfds); |
445 | for (i = 0; i < evdev_fd_cnt; i++) |
446 | FD_SET(evdev_fds[i], &rfds); |
447 | |
932302ef |
448 | FD_ZERO(&wfds); |
449 | FD_SET(dev.fd, &wfds); |
450 | |
1cb2822f |
451 | ret = select(dev.fd + 1, &rfds, &wfds, NULL, NULL); |
932302ef |
452 | if (ret < 0) { |
453 | perror("select"); |
454 | return 1; |
455 | } |
456 | |
1cb2822f |
457 | /* something from input devices? */ |
458 | fixed_input_changed = 0; |
459 | for (i = 0; i < evdev_fd_cnt; i++) { |
460 | if (FD_ISSET(evdev_fds[i], &rfds)) { |
461 | fixed_input_changed |= |
462 | do_evdev_input(evdev_fds[i]); |
463 | } |
464 | } |
465 | |
466 | /* something from USB? */ |
932302ef |
467 | if (FD_ISSET(dev.fd, &wfds)) { |
468 | reaped_urb = NULL; |
469 | ret = ioctl(dev.fd, USBDEVFS_REAPURB, &reaped_urb); |
470 | if (ret != 0) { |
471 | if (errno == ENODEV) |
472 | goto dev_close; |
473 | perror("USBDEVFS_REAPURB"); |
474 | return 1; |
475 | } |
476 | |
477 | if (reaped_urb != NULL && reaped_urb->status != 0) { |
478 | errno = -reaped_urb->status; |
479 | perror("urb status"); |
480 | if (reaped_urb->status == -EILSEQ) { |
481 | /* this is usually a sign of disconnect.. */ |
482 | usleep(250000); |
483 | goto dev_close; |
484 | } |
485 | } |
486 | |
487 | if (reaped_urb == &urb[URB_DATA_IN]) { |
488 | printf("*data*\n"); |
489 | data_in_sent = 0; |
490 | } |
1cb2822f |
491 | if (reaped_urb == &urb[URB_DATA_OUT]) { |
492 | } |
932302ef |
493 | else if (reaped_urb == &urb[URB_DBG_IN]) { |
494 | /* debug text */ |
495 | buf_dbg[reaped_urb->actual_length] = 0; |
496 | printf("%s", buf_dbg); |
497 | dbg_in_sent = 0; |
498 | } |
499 | else { |
500 | fprintf(stderr, "reaped unknown urb? %p\n", reaped_urb); |
501 | } |
502 | } |
1cb2822f |
503 | |
504 | /* something to send? */ |
505 | if (fixed_input_changed) { |
506 | memset(buf_out, 0, sizeof(buf_out)); |
507 | memcpy(buf_out, fixed_input_state, sizeof(fixed_input_state)); |
508 | |
509 | memset(&urb[URB_DATA_OUT], 0, sizeof(urb[URB_DATA_OUT])); |
510 | urb[URB_DATA_OUT].type = USBDEVFS_URB_TYPE_INTERRUPT; |
511 | urb[URB_DATA_OUT].endpoint = dev.ifaces[0].ep_out; |
512 | urb[URB_DATA_OUT].buffer = buf_out; |
513 | urb[URB_DATA_OUT].buffer_length = sizeof(buf_out); |
514 | |
515 | ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DATA_OUT]); |
516 | if (ret != 0) { |
517 | perror("USBDEVFS_SUBMITURB URB_DATA_OUT"); |
518 | return 1; |
519 | } |
520 | } |
521 | |
932302ef |
522 | continue; |
523 | |
524 | dev_close: |
525 | close(dev.fd); |
526 | dev.fd = -1; |
527 | } |
528 | |
932302ef |
529 | return 0; |
530 | } |
531 | |
532 | // vim: ts=2:sw=2:expandtab |