8 #include <sys/select.h>
12 #include <linux/usbdevice_fs.h>
13 #include <linux/usb/ch9.h>
14 #include <linux/input.h>
16 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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)
30 const char path_root[] = "/dev/bus/usb";
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? */
39 char path_bus[256], path_dev[256];
40 struct dirent *ent, *ent_bus;
41 DIR *dir = NULL, *dir_bus = NULL;
47 memset(dev, 0xff, sizeof(*dev));
49 dir = opendir(path_root);
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)
60 snprintf(path_bus, sizeof(path_bus), "%s/%s",
61 path_root, ent->d_name);
63 dir_bus = opendir(path_bus);
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)
72 snprintf(path_dev, sizeof(path_dev), "%s/%s/%s",
73 path_root, ent->d_name, ent_bus->d_name);
75 fd = open(path_dev, O_RDWR);
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));
86 if (desc.d.bDescriptorType != USB_DT_DEVICE) {
87 fprintf(stderr, "%s: bad DT: 0x%02x\n",
88 path_dev, desc.d.bDescriptorType);
92 if (desc.d.idVendor == vendor && desc.d.idProduct == product)
109 if (desc.d.bNumConfigurations != 1) {
110 fprintf(stderr, "unexpected bNumConfigurations: %u\n",
111 desc.d.bNumConfigurations);
115 /* walk through all descriptors */
118 ret = read(fd, &desc.hdr, sizeof(desc.hdr));
121 if (ret != sizeof(desc.hdr)) {
122 fprintf(stderr, "desc.hdr read: %d/%zd: ", ret, sizeof(desc.hdr));
127 ret = (int)lseek(fd, -sizeof(desc.hdr), SEEK_CUR);
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);
140 switch (desc.hdr.bDescriptorType) {
142 if (desc.c.bNumInterfaces != 2) {
143 fprintf(stderr, "unexpected bNumInterfaces: %u\n",
144 desc.c.bNumInterfaces);
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);
158 if (desc.i.bNumEndpoints != 2) {
159 fprintf(stderr, "unexpected bNumEndpoints: %u\n",
160 desc.i.bNumEndpoints);
166 case USB_DT_ENDPOINT:
167 if (iface < 0 || iface >= ARRAY_SIZE(dev->ifaces)) {
168 fprintf(stderr, "bad iface: %d\n", iface);
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);
177 if (desc.e.bEndpointAddress & 0x80)
178 dev->ifaces[iface].ep_in = desc.e.bEndpointAddress; // & 0x7F;
180 dev->ifaces[iface].ep_out = desc.e.bEndpointAddress;
188 fprintf(stderr, "skipping desc 0x%02x\n",
189 desc.hdr.bDescriptorType);
194 /* claim interfaces */
195 for (iface = 0; iface < ARRAY_SIZE(dev->ifaces); iface++) {
196 struct usbdevfs_ioctl usbio;
198 if (dev->ifaces[iface].ep_in == -1) {
199 fprintf(stderr, "missing ep_in, iface: %d\n", iface);
202 if (dev->ifaces[iface].ep_out == -1) {
203 fprintf(stderr, "missing ep_out, iface: %d\n", iface);
207 /* disconnect default driver */
208 memset(&usbio, 0, sizeof(usbio));
210 usbio.ioctl_code = USBDEVFS_DISCONNECT;
211 ret = ioctl(fd, USBDEVFS_IOCTL, &usbio);
212 if (ret != 0 && errno != ENODATA)
213 perror("USBDEVFS_DISCONNECT");
215 ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &iface);
217 perror("USBDEVFS_CLAIMINTERFACE");
235 /* ?0SA 00DU, ?1CB RLDU */
236 #define STATE_BYTES 2
238 static uint8_t fixed_input_state[STATE_BYTES] = { 0x33, 0x3f };
251 static const enum mdbtn evdev_md_map[KEY_CNT] = {
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,
259 [KEY_LEFTALT] = MDBTN_START,
262 int do_evdev_input(int fd)
264 uint8_t old_state[STATE_BYTES];
265 uint8_t changed_bits[STATE_BYTES] = { 0, };
266 struct input_event ev;
270 ret = read(fd, &ev, sizeof(ev));
271 if (ret != sizeof(ev)) {
272 fprintf(stderr, "evdev read %d/%zd: ", ret, sizeof(ev));
277 if (ev.type != EV_KEY)
280 if (ev.value != 0 && ev.value != 1)
283 if ((uint32_t)ev.code >= ARRAY_SIZE(evdev_md_map)) {
284 fprintf(stderr, "evdev read bad key: %u\n", ev.code);
288 mdbtn = evdev_md_map[ev.code];
292 memcpy(old_state, fixed_input_state, STATE_BYTES);
294 /* ?0SA 00DU, ?1CB RLDU */
297 changed_bits[0] = 0x01;
298 changed_bits[1] = 0x01;
301 changed_bits[0] = 0x02;
302 changed_bits[1] = 0x02;
305 changed_bits[0] = 0x00;
306 changed_bits[1] = 0x04;
309 changed_bits[0] = 0x00;
310 changed_bits[1] = 0x08;
313 changed_bits[0] = 0x10;
314 changed_bits[1] = 0x00;
317 changed_bits[0] = 0x00;
318 changed_bits[1] = 0x10;
321 changed_bits[0] = 0x00;
322 changed_bits[1] = 0x20;
325 changed_bits[0] = 0x20;
326 changed_bits[1] = 0x00;
332 for (i = 0; i < STATE_BYTES; i++)
333 fixed_input_state[i] &= ~changed_bits[i];
337 for (i = 0; i < STATE_BYTES; i++)
338 fixed_input_state[i] |= changed_bits[i];
341 return memcmp(old_state, fixed_input_state, STATE_BYTES) ? 1 : 0;
351 int main(int argc, char *argv[])
353 char buf_dbg[64 + 1], buf_in[64], buf_out[64];
354 struct teensy_dev dev;
355 struct usbdevfs_urb urb[URB_CNT];
356 struct usbdevfs_urb *reaped_urb;
357 int fixed_input_changed;
359 int evdev_fd_cnt = 0;
363 int data_in_sent = 0;
368 for (i = 1; i < argc; i++) {
369 if (evdev_fd_cnt >= ARRAY_SIZE(evdev_fds)) {
370 fprintf(stderr, "too many evdevs\n");
373 fd = open(argv[i], O_RDONLY);
375 fprintf(stderr, "open %s: ", argv[i]);
380 ret = ioctl(fd, EVIOCGBIT(0, sizeof(evdev_support)),
384 if (!(evdev_support & (1 << EV_KEY))) {
385 fprintf(stderr, "%s doesn't have keys\n", argv[i]);
389 evdev_fds[evdev_fd_cnt++] = fd;
397 ret = find_device(&dev, 0x16C0, 0x0486);
403 printf("waiting for device..\n");
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);
422 ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DATA_IN]);
424 perror("USBDEVFS_SUBMITURB URB_DATA_IN");
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;
436 ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DBG_IN]);
438 perror("USBDEVFS_SUBMITURB URB_DBG_IN");
445 for (i = 0; i < evdev_fd_cnt; i++)
446 FD_SET(evdev_fds[i], &rfds);
449 FD_SET(dev.fd, &wfds);
451 ret = select(dev.fd + 1, &rfds, &wfds, NULL, NULL);
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]);
466 /* something from USB? */
467 if (FD_ISSET(dev.fd, &wfds)) {
469 ret = ioctl(dev.fd, USBDEVFS_REAPURB, &reaped_urb);
473 perror("USBDEVFS_REAPURB");
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.. */
487 if (reaped_urb == &urb[URB_DATA_IN]) {
491 if (reaped_urb == &urb[URB_DATA_OUT]) {
493 else if (reaped_urb == &urb[URB_DBG_IN]) {
495 buf_dbg[reaped_urb->actual_length] = 0;
496 printf("%s", buf_dbg);
500 fprintf(stderr, "reaped unknown urb? %p\n", reaped_urb);
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));
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);
515 ret = ioctl(dev.fd, USBDEVFS_SUBMITURB, &urb[URB_DATA_OUT]);
517 perror("USBDEVFS_SUBMITURB URB_DATA_OUT");
532 // vim: ts=2:sw=2:expandtab