+long emu_do_read(int fd, void *buf, int count)
+{
+ static const char wm97xx_p[] =
+ "5507 0 -831476 0 -4218 16450692 65536"; // from 4.0 fw
+ int ret, pressed = 0, x, y;
+ struct {
+ u16 pressure, x, y;
+ } wm97xx;
+
+ if (count < 0) {
+ err("read(%d, %d)\n", fd, count);
+ return -EINVAL;
+ }
+
+ switch (fd) {
+ case FAKEDEV_GPIO:
+ mmsp2.btn_state = host_read_btns();
+
+ if (count > 4)
+ count = 4;
+ memcpy(buf, &mmsp2.btn_state, count);
+ break;
+ case FAKEDEV_WM97XX:
+ ret = host_read_ts(&pressed, &x, &y);
+ if (ret == 0 && pressed) {
+ wm97xx.pressure = 1;
+ wm97xx.x = x * 3750 / 1024 + 200;
+ wm97xx.y = 3750 - y * 3750 / 1024 + 200;
+ }
+ else {
+ wm97xx.pressure = 0;
+ wm97xx.x = wm97xx.y = 200;
+ }
+
+ if (count > sizeof(wm97xx))
+ count = sizeof(wm97xx);
+ memcpy(buf, &wm97xx, count);
+ break;
+ case FAKEDEV_WM97XX_P:
+ if (count < sizeof(wm97xx_p))
+ err("incomplete pointercal read\n");
+ strncpy(buf, wm97xx_p, count);
+ break;
+ default:
+ err("read(%d, %d)\n", fd, count);
+ return -EINVAL;
+ }
+ return count;
+}
+
+struct dev_fd_t emu_interesting_fds[] = {
+ [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
+ { NULL, 0, NULL },
+};
+