diff options
Diffstat (limited to 'drivers/hid/hid-wiimote-ext.c')
| -rw-r--r-- | drivers/hid/hid-wiimote-ext.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/hid/hid-wiimote-ext.c b/drivers/hid/hid-wiimote-ext.c index 0a1805c..bc85bf2 100644 --- a/drivers/hid/hid-wiimote-ext.c +++ b/drivers/hid/hid-wiimote-ext.c @@ -28,12 +28,14 @@ struct wiimote_ext { bool mp_plugged; bool motionp; __u8 ext_type; + __u16 calib[4][3]; }; enum wiiext_type { WIIEXT_NONE, /* placeholder */ WIIEXT_CLASSIC, /* Nintendo classic controller */ WIIEXT_NUNCHUCK, /* Nintendo nunchuck controller */ + WIIEXT_BALANCE_BOARD, /* Nintendo balance board controller */ }; enum wiiext_keys { @@ -126,6 +128,7 @@ error: static __u8 ext_read(struct wiimote_ext *ext) { ssize_t ret; + __u8 buf[24], i, j, offs = 0; __u8 rmem[2], wmem; __u8 type = WIIEXT_NONE; @@ -151,6 +154,28 @@ static __u8 ext_read(struct wiimote_ext *ext) type = WIIEXT_NUNCHUCK; else if (rmem[0] == 0x01 && rmem[1] == 0x01) type = WIIEXT_CLASSIC; + else if (rmem[0] == 0x04 && rmem[1] == 0x02) + type = WIIEXT_BALANCE_BOARD; + } + + /* get balance board calibration data */ + if (type == WIIEXT_BALANCE_BOARD) { + ret = wiimote_cmd_read(ext->wdata, 0xa40024, buf, 12); + ret += wiimote_cmd_read(ext->wdata, 0xa40024 + 12, + buf + 12, 12); + + if (ret != 24) { + type = WIIEXT_NONE; + } else { + for (i = 0; i < 3; i++) { + for (j = 0; j < 4; j++) { + ext->calib[j][i] = buf[offs]; + ext->calib[j][i] <<= 8; + ext->calib[j][i] |= buf[offs + 1]; + offs += 2; + } + } + } } wiimote_cmd_release(ext->wdata); @@ -509,6 +534,71 @@ static void handler_classic(struct wiimote_ext *ext, const __u8 *payload) input_sync(ext->input); } +static void handler_balance_board(struct wiimote_ext *ext, const __u8 *payload) +{ + __s32 val[4], tmp; + unsigned int i; + + /* Byte | 8 7 6 5 4 3 2 1 | + * -----+--------------------------+ + * 1 | Top Right <15:8> | + * 2 | Top Right <7:0> | + * -----+--------------------------+ + * 3 | Bottom Right <15:8> | + * 4 | Bottom Right <7:0> | + * -----+--------------------------+ + * 5 | Top Left <15:8> | + * 6 | Top Left <7:0> | + * -----+--------------------------+ + * 7 | Bottom Left <15:8> | + * 8 | Bottom Left <7:0> | + * -----+--------------------------+ + * + * These values represent the weight-measurements of the Wii-balance + * board with 16bit precision. + * + * The balance-board is never reported interleaved with motionp. + */ + + val[0] = payload[0]; + val[0] <<= 8; + val[0] |= payload[1]; + + val[1] = payload[2]; + val[1] <<= 8; + val[1] |= payload[3]; + + val[2] = payload[4]; + val[2] <<= 8; + val[2] |= payload[5]; + + val[3] = payload[6]; + val[3] <<= 8; + val[3] |= payload[7]; + + /* apply calibration data */ + for (i = 0; i < 4; i++) { + if (val[i] < ext->calib[i][1]) { + tmp = val[i] - ext->calib[i][0]; + tmp *= 1700; + tmp /= ext->calib[i][1] - ext->calib[i][0]; + } else { + tmp = val[i] - ext->calib[i][1]; + tmp *= 1700; + tmp /= ext->calib[i][2] - ext->calib[i][1]; + tmp += 1700; + } + val[i] = tmp; + } + + input_report_abs(ext->input, ABS_HAT0X, val[0]); + input_report_abs(ext->input, ABS_HAT0Y, val[1]); + input_report_abs(ext->input, ABS_HAT1X, val[2]); + input_report_abs(ext->input, ABS_HAT1Y, val[3]); + + input_sync(ext->input); +} + /* call this with state.lock spinlock held */ void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload) { @@ -523,6 +613,8 @@ void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload) handler_nunchuck(ext, payload); } else if (ext->ext_type == WIIEXT_CLASSIC) { handler_classic(ext, payload); + } else if (ext->ext_type == WIIEXT_BALANCE_BOARD) { + handler_balance_board(ext, payload); } } @@ -551,6 +643,11 @@ static ssize_t wiiext_show(struct device *dev, struct device_attribute *attr, return sprintf(buf, "motionp+classic\n"); else return sprintf(buf, "classic\n"); + } else if (type == WIIEXT_BALANCE_BOARD) { + if (motionp) + return sprintf(buf, "motionp+balanceboard\n"); + else + return sprintf(buf, "balanceboard\n"); } else { if (motionp) return sprintf(buf, "motionp\n"); |