/* * Device Modules for Nintendo Wii / Wii U HID Driver * Copyright (c) 2011-2013 David Herrmann */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ /* * Wiimote Modules * Nintendo devices provide different peripherals and many new devices lack * initial features like the IR camera. Therefore, each peripheral device is * implemented as an independent module and we probe on each device only the * modules for the hardware that really is available. * * Module registration is sequential. Unregistration is done in reverse order. * After device detection, the needed modules are loaded. Users can trigger * re-detection which causes all modules to be unloaded and then reload the * modules for the new detected device. * * wdata->input is a shared input device. It is always initialized prior to * module registration. If at least one registered module is marked as * WIIMOD_FLAG_INPUT, then the input device will get registered after all * modules were registered. * Please note that it is unregistered _before_ the "remove" callbacks are * called. This guarantees that no input interaction is done, anymore. However, * the wiimote core keeps a reference to the input device so it is freed only * after all modules were removed. It is safe to send events to unregistered * input devices. */ #include #include #include #include #include "hid-wiimote.h" /* * Keys * The initial Wii Remote provided a bunch of buttons that are reported as * part of the core protocol. Many later devices dropped these and report * invalid data in the core button reports. Load this only on devices which * correctly send button reports. * It uses the shared input device. */ static const __u16 wiimod_keys_map[] = { KEY_LEFT, /* WIIPROTO_KEY_LEFT */ KEY_RIGHT, /* WIIPROTO_KEY_RIGHT */ KEY_UP, /* WIIPROTO_KEY_UP */ KEY_DOWN, /* WIIPROTO_KEY_DOWN */ KEY_NEXT, /* WIIPROTO_KEY_PLUS */ KEY_PREVIOUS, /* WIIPROTO_KEY_MINUS */ BTN_1, /* WIIPROTO_KEY_ONE */ BTN_2, /* WIIPROTO_KEY_TWO */ BTN_A, /* WIIPROTO_KEY_A */ BTN_B, /* WIIPROTO_KEY_B */ BTN_MODE, /* WIIPROTO_KEY_HOME */ }; static void wiimod_keys_in_keys(struct wiimote_data *wdata, const __u8 *keys) { input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_LEFT], !!(keys[0] & 0x01)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_RIGHT], !!(keys[0] & 0x02)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_DOWN], !!(keys[0] & 0x04)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_UP], !!(keys[0] & 0x08)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_PLUS], !!(keys[0] & 0x10)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_TWO], !!(keys[1] & 0x01)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_ONE], !!(keys[1] & 0x02)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_B], !!(keys[1] & 0x04)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_A], !!(keys[1] & 0x08)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_MINUS], !!(keys[1] & 0x10)); input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_HOME], !!(keys[1] & 0x80)); input_sync(wdata->input); } static int wiimod_keys_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { unsigned int i; set_bit(EV_KEY, wdata->input->evbit); for (i = 0; i < WIIPROTO_KEY_COUNT; ++i) set_bit(wiimod_keys_map[i], wdata->input->keybit); return 0; } static const struct wiimod_ops wiimod_keys = { .flags = WIIMOD_FLAG_INPUT, .arg = 0, .probe = wiimod_keys_probe, .remove = NULL, .in_keys = wiimod_keys_in_keys, }; /* * Rumble * Nearly all devices provide a rumble feature. A small motor for * force-feedback effects. We provide an FF_RUMBLE memless ff device on the * shared input device if this module is loaded. * The rumble motor is controlled via a flag on almost every output report so * the wiimote core handles the rumble flag. But if a device doesn't provide * the rumble motor, this flag shouldn't be set. */ static int wiimod_rumble_play(struct input_dev *dev, void *data, struct ff_effect *eff) { struct wiimote_data *wdata = input_get_drvdata(dev); __u8 value; unsigned long flags; /* * The wiimote supports only a single rumble motor so if any magnitude * is set to non-zero then we start the rumble motor. If both are set to * zero, we stop the rumble motor. */ if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude) value = 1; else value = 0; spin_lock_irqsave(&wdata->state.lock, flags); wiiproto_req_rumble(wdata, value); spin_unlock_irqrestore(&wdata->state.lock, flags); return 0; } static int wiimod_rumble_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { set_bit(FF_RUMBLE, wdata->input->ffbit); if (input_ff_create_memless(wdata->input, NULL, wiimod_rumble_play)) return -ENOMEM; return 0; } static void wiimod_rumble_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { unsigned long flags; spin_lock_irqsave(&wdata->state.lock, flags); wiiproto_req_rumble(wdata, 0); spin_unlock_irqrestore(&wdata->state.lock, flags); } static const struct wiimod_ops wiimod_rumble = { .flags = WIIMOD_FLAG_INPUT, .arg = 0, .probe = wiimod_rumble_probe, .remove = wiimod_rumble_remove, }; /* * Battery * 1 byte of battery capacity information is sent along every protocol status * report. The wiimote core caches it but we try to update it on every * user-space request. * This is supported by nearly every device so it's almost always enabled. */ static enum power_supply_property wiimod_battery_props[] = { POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_SCOPE, }; static int wiimod_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct wiimote_data *wdata = container_of(psy, struct wiimote_data, battery); int ret = 0, state; unsigned long flags; if (psp == POWER_SUPPLY_PROP_SCOPE) { val->intval = POWER_SUPPLY_SCOPE_DEVICE; return 0; } else if (psp != POWER_SUPPLY_PROP_CAPACITY) { return -EINVAL; } ret = wiimote_cmd_acquire(wdata); if (ret) return ret; spin_lock_irqsave(&wdata->state.lock, flags); wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0); wiiproto_req_status(wdata); spin_unlock_irqrestore(&wdata->state.lock, flags); wiimote_cmd_wait(wdata); wiimote_cmd_release(wdata); spin_lock_irqsave(&wdata->state.lock, flags); state = wdata->state.cmd_battery; spin_unlock_irqrestore(&wdata->state.lock, flags); val->intval = state * 100 / 255; return ret; } static int wiimod_battery_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { int ret; wdata->battery.properties = wiimod_battery_props; wdata->battery.num_properties = ARRAY_SIZE(wiimod_battery_props); wdata->battery.get_property = wiimod_battery_get_property; wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY; wdata->battery.use_for_apm = 0; wdata->battery.name = kasprintf(GFP_KERNEL, "wiimote_battery_%s", wdata->hdev->uniq); if (!wdata->battery.name) return -ENOMEM; ret = power_supply_register(&wdata->hdev->dev, &wdata->battery); if (ret) { hid_err(wdata->hdev, "cannot register battery device\n"); goto err_free; } power_supply_powers(&wdata->battery, &wdata->hdev->dev); return 0; err_free: kfree(wdata->battery.name); wdata->battery.name = NULL; return ret; } static void wiimod_battery_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { if (!wdata->battery.name) return; power_supply_unregister(&wdata->battery); kfree(wdata->battery.name); wdata->battery.name = NULL; } static const struct wiimod_ops wiimod_battery = { .flags = 0, .arg = 0, .probe = wiimod_battery_probe, .remove = wiimod_battery_remove, }; /* * LED * 0 to 4 player LEDs are supported by devices. The "arg" field of the * wiimod_ops structure specifies which LED this module controls. This allows * to register a limited number of LEDs. * State is managed by wiimote core. */ static enum led_brightness wiimod_led_get(struct led_classdev *led_dev) { struct wiimote_data *wdata; struct device *dev = led_dev->dev->parent; int i; unsigned long flags; bool value = false; wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev)); for (i = 0; i < 4; ++i) { if (wdata->leds[i] == led_dev) { spin_lock_irqsave(&wdata->state.lock, flags); value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1); spin_unlock_irqrestore(&wdata->state.lock, flags); break; } } return value ? LED_FULL : LED_OFF; } static void wiimod_led_set(struct led_classdev *led_dev, enum led_brightness value) { struct wiimote_data *wdata; struct device *dev = led_dev->dev->parent; int i; unsigned long flags; __u8 state, flag; wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev)); for (i = 0; i < 4; ++i) { if (wdata->leds[i] == led_dev) { flag = WIIPROTO_FLAG_LED(i + 1); spin_lock_irqsave(&wdata->state.lock, flags); state = wdata->state.flags; if (value == LED_OFF) wiiproto_req_leds(wdata, state & ~flag); else wiiproto_req_leds(wdata, state | flag); spin_unlock_irqrestore(&wdata->state.lock, flags); break; } } } static int wiimod_led_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { struct device *dev = &wdata->hdev->dev; size_t namesz = strlen(dev_name(dev)) + 9; struct led_classdev *led; unsigned long flags; char *name; int ret; led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL); if (!led) return -ENOMEM; name = (void*)&led[1]; snprintf(name, namesz, "%s:blue:p%lu", dev_name(dev), ops->arg); led->name = name; led->brightness = 0; led->max_brightness = 1; led->brightness_get = wiimod_led_get; led->brightness_set = wiimod_led_set; wdata->leds[ops->arg] = led; ret = led_classdev_register(dev, led); if (ret) goto err_free; /* enable LED1 to stop initial LED-blinking */ if (ops->arg == 0) { spin_lock_irqsave(&wdata->state.lock, flags); wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1); spin_unlock_irqrestore(&wdata->state.lock, flags); } return 0; err_free: wdata->leds[ops->arg] = NULL; kfree(led); return ret; } static void wiimod_led_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { if (!wdata->leds[ops->arg]) return; led_classdev_unregister(wdata->leds[ops->arg]); kfree(wdata->leds[ops->arg]); wdata->leds[ops->arg] = NULL; } static const struct wiimod_ops wiimod_leds[4] = { { .flags = 0, .arg = 0, .probe = wiimod_led_probe, .remove = wiimod_led_remove, }, { .flags = 0, .arg = 1, .probe = wiimod_led_probe, .remove = wiimod_led_remove, }, { .flags = 0, .arg = 2, .probe = wiimod_led_probe, .remove = wiimod_led_remove, }, { .flags = 0, .arg = 3, .probe = wiimod_led_probe, .remove = wiimod_led_remove, }, }; /* * Accelerometer * 3 axis accelerometer data is part of nearly all DRMs. If not supported by a * device, it's mostly cleared to 0. This module parses this data and provides * it via a separate input device. */ static void wiimod_accel_in_accel(struct wiimote_data *wdata, const __u8 *accel) { __u16 x, y, z; if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL)) return; /* * payload is: BB BB XX YY ZZ * Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ * contain the upper 8 bits of each value. The lower 2 bits are * contained in the buttons data BB BB. * Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the * X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y * accel value and bit 6 is the second bit of the Z value. * The first bit of Y and Z values is not available and always set to 0. * 0x200 is returned on no movement. */ x = accel[2] << 2; y = accel[3] << 2; z = accel[4] << 2; x |= (accel[0] >> 5) & 0x3; y |= (accel[1] >> 4) & 0x2; z |= (accel[1] >> 5) & 0x2; input_report_abs(wdata->accel, ABS_RX, x - 0x200); input_report_abs(wdata->accel, ABS_RY, y - 0x200); input_report_abs(wdata->accel, ABS_RZ, z - 0x200); input_sync(wdata->accel); } static int wiimod_accel_open(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&wdata->state.lock, flags); wiiproto_req_accel(wdata, true); spin_unlock_irqrestore(&wdata->state.lock, flags); return 0; } static void wiimod_accel_close(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&wdata->state.lock, flags); wiiproto_req_accel(wdata, false); spin_unlock_irqrestore(&wdata->state.lock, flags); } static int wiimod_accel_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { int ret; wdata->accel = input_allocate_device(); if (!wdata->accel) return -ENOMEM; input_set_drvdata(wdata->accel, wdata); wdata->accel->open = wiimod_accel_open; wdata->accel->close = wiimod_accel_close; wdata->accel->dev.parent = &wdata->hdev->dev; wdata->accel->id.bustype = wdata->hdev->bus; wdata->accel->id.vendor = wdata->hdev->vendor; wdata->accel->id.product = wdata->hdev->product; wdata->accel->id.version = wdata->hdev->version; wdata->accel->name = WIIMOTE_NAME " Accelerometer"; set_bit(EV_ABS, wdata->accel->evbit); set_bit(ABS_RX, wdata->accel->absbit); set_bit(ABS_RY, wdata->accel->absbit); set_bit(ABS_RZ, wdata->accel->absbit); input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4); input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4); input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4); ret = input_register_device(wdata->accel); if (ret) { hid_err(wdata->hdev, "cannot register input device\n"); goto err_free; } return 0; err_free: input_free_device(wdata->accel); wdata->accel = NULL; return ret; } static void wiimod_accel_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { if (!wdata->accel) return; input_unregister_device(wdata->accel); wdata->accel = NULL; } static const struct wiimod_ops wiimod_accel = { .flags = 0, .arg = 0, .probe = wiimod_accel_probe, .remove = wiimod_accel_remove, .in_accel = wiimod_accel_in_accel, }; /* * IR Cam * Up to 4 IR sources can be tracked by a normal Wii Remote. The IR cam needs * to be initialized with a fairly complex procedure and consumes a lot of * power. Therefore, as long as no application uses the IR input device, it is * kept offline. * Nearly no other device than the normal Wii Remotes supports the IR cam so * you can disable this module for these devices. */ static void wiimod_ir_in_ir(struct wiimote_data *wdata, const __u8 *ir, bool packed, unsigned int id) { __u16 x, y; __u8 xid, yid; bool sync = false; if (!(wdata->state.flags & WIIPROTO_FLAGS_IR)) return; switch (id) { case 0: xid = ABS_HAT0X; yid = ABS_HAT0Y; break; case 1: xid = ABS_HAT1X; yid = ABS_HAT1Y; break; case 2: xid = ABS_HAT2X; yid = ABS_HAT2Y; break; case 3: xid = ABS_HAT3X; yid = ABS_HAT3Y; sync = true; break; default: return; }; /* * Basic IR data is encoded into 3 bytes. The first two bytes are the * lower 8 bit of the X/Y data, the 3rd byte contains the upper 2 bits * of both. * If data is packed, then the 3rd byte is put first and slightly * reordered. This allows to interleave packed and non-packed data to * have two IR sets in 5 bytes instead of 6. * The resulting 10bit X/Y values are passed to the ABS_HAT? input dev. */ if (packed) { x = ir[1] | ((ir[0] & 0x03) << 8); y = ir[2] | ((ir[0] & 0x0c) << 6); } else { x = ir[0] | ((ir[2] & 0x30) << 4); y = ir[1] | ((ir[2] & 0xc0) << 2); } input_report_abs(wdata->ir, xid, x); input_report_abs(wdata->ir, yid, y); if (sync) input_sync(wdata->ir); } static int wiimod_ir_change(struct wiimote_data *wdata, __u16 mode) { int ret; unsigned long flags; __u8 format = 0; static const __u8 data_enable[] = { 0x01 }; static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01, 0x00, 0xaa, 0x00, 0x64 }; static const __u8 data_sens2[] = { 0x63, 0x03 }; static const __u8 data_fin[] = { 0x08 }; spin_lock_irqsave(&wdata->state.lock, flags); if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) { spin_unlock_irqrestore(&wdata->state.lock, flags); return 0; } if (mode == 0) { wdata->state.flags &= ~WIIPROTO_FLAGS_IR; wiiproto_req_ir1(wdata, 0); wiiproto_req_ir2(wdata, 0); wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL); spin_unlock_irqrestore(&wdata->state.lock, flags); return 0; } spin_unlock_irqrestore(&wdata->state.lock, flags); ret = wiimote_cmd_acquire(wdata); if (ret) return ret; /* send PIXEL CLOCK ENABLE cmd first */ spin_lock_irqsave(&wdata->state.lock, flags); wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0); wiiproto_req_ir1(wdata, 0x06); spin_unlock_irqrestore(&wdata->state.lock, flags); ret = wiimote_cmd_wait(wdata); if (ret) goto unlock; if (wdata->state.cmd_err) { ret = -EIO; goto unlock; } /* enable IR LOGIC */ spin_lock_irqsave(&wdata->state.lock, flags); wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0); wiiproto_req_ir2(wdata, 0x06); spin_unlock_irqrestore(&wdata->state.lock, flags); ret = wiimote_cmd_wait(wdata); if (ret) goto unlock; if (wdata->state.cmd_err) { ret = -EIO; goto unlock; } /* enable IR cam but do not make it send data, yet */ ret = wiimote_cmd_write(wdata, 0xb00030, data_enable, sizeof(data_enable)); if (ret) goto unlock; /* write first sensitivity block */ ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1, sizeof(data_sens1)); if (ret) goto unlock; /* write second sensitivity block */ ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2, sizeof(data_sens2)); if (ret) goto unlock; /* put IR cam into desired state */ switch (mode) { case WIIPROTO_FLAG_IR_FULL: format = 5; break; case WIIPROTO_FLAG_IR_EXT: format = 3; break; case WIIPROTO_FLAG_IR_BASIC: format = 1; break; } ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format)); if (ret) goto unlock; /* make IR cam send data */ ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin)); if (ret) goto unlock; /* request new DRM mode compatible to IR mode */ spin_lock_irqsave(&wdata->state.lock, flags); wdata->state.flags &= ~WIIPROTO_FLAGS_IR; wdata->state.flags |= mode & WIIPROTO_FLAGS_IR; wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL); spin_unlock_irqrestore(&wdata->state.lock, flags); unlock: wiimote_cmd_release(wdata); return ret; } static int wiimod_ir_open(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); return wiimod_ir_change(wdata, WIIPROTO_FLAG_IR_BASIC); } static void wiimod_ir_close(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); wiimod_ir_change(wdata, 0); } static int wiimod_ir_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { int ret; wdata->ir = input_allocate_device(); if (!wdata->ir) return -ENOMEM; input_set_drvdata(wdata->ir, wdata); wdata->ir->open = wiimod_ir_open; wdata->ir->close = wiimod_ir_close; wdata->ir->dev.parent = &wdata->hdev->dev; wdata->ir->id.bustype = wdata->hdev->bus; wdata->ir->id.vendor = wdata->hdev->vendor; wdata->ir->id.product = wdata->hdev->product; wdata->ir->id.version = wdata->hdev->version; wdata->ir->name = WIIMOTE_NAME " IR"; set_bit(EV_ABS, wdata->ir->evbit); set_bit(ABS_HAT0X, wdata->ir->absbit); set_bit(ABS_HAT0Y, wdata->ir->absbit); set_bit(ABS_HAT1X, wdata->ir->absbit); set_bit(ABS_HAT1Y, wdata->ir->absbit); set_bit(ABS_HAT2X, wdata->ir->absbit); set_bit(ABS_HAT2Y, wdata->ir->absbit); set_bit(ABS_HAT3X, wdata->ir->absbit); set_bit(ABS_HAT3Y, wdata->ir->absbit); input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4); input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4); ret = input_register_device(wdata->ir); if (ret) { hid_err(wdata->hdev, "cannot register input device\n"); goto err_free; } return 0; err_free: input_free_device(wdata->ir); wdata->ir = NULL; return ret; } static void wiimod_ir_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { if (!wdata->ir) return; input_unregister_device(wdata->ir); wdata->ir = NULL; } static const struct wiimod_ops wiimod_ir = { .flags = 0, .arg = 0, .probe = wiimod_ir_probe, .remove = wiimod_ir_remove, .in_ir = wiimod_ir_in_ir, }; /* * Balance Board Extension * The Nintendo Wii Balance Board provides four hardware weight sensor plus a * single push button. No other peripherals are available. However, the * balance-board data is sent via a standard Wii Remote extension. All other * data for non-present hardware is zeroed out. * Some 3rd party devices react allergic if we try to access normal Wii Remote * hardware, so this extension module should be the only module that is loaded * on balance boards. * The balance board needs 8 bytes extension data instead of basic 6 bytes so * it needs the WIIMOD_FLAG_EXT8 flag. */ static void wiimod_bboard_in_keys(struct wiimote_data *wdata, const __u8 *keys) { input_report_key(wdata->extension.input, BTN_A, !!(keys[1] & 0x08)); input_sync(wdata->extension.input); } static void wiimod_bboard_in_ext(struct wiimote_data *wdata, const __u8 *ext) { __s32 val[4], tmp, div; unsigned int i; struct wiimote_state *s = &wdata->state; /* * Balance board data layout: * * 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] = ext[0]; val[0] <<= 8; val[0] |= ext[1]; val[1] = ext[2]; val[1] <<= 8; val[1] |= ext[3]; val[2] = ext[4]; val[2] <<= 8; val[2] |= ext[5]; val[3] = ext[6]; val[3] <<= 8; val[3] |= ext[7]; /* apply calibration data */ for (i = 0; i < 4; i++) { if (val[i] <= s->calib_bboard[i][0]) { tmp = 0; } else if (val[i] < s->calib_bboard[i][1]) { tmp = val[i] - s->calib_bboard[i][0]; tmp *= 1700; div = s->calib_bboard[i][1] - s->calib_bboard[i][0]; tmp /= div ? div : 1; } else { tmp = val[i] - s->calib_bboard[i][1]; tmp *= 1700; div = s->calib_bboard[i][2] - s->calib_bboard[i][1]; tmp /= div ? div : 1; tmp += 1700; } val[i] = tmp; } input_report_abs(wdata->extension.input, ABS_HAT0X, val[0]); input_report_abs(wdata->extension.input, ABS_HAT0Y, val[1]); input_report_abs(wdata->extension.input, ABS_HAT1X, val[2]); input_report_abs(wdata->extension.input, ABS_HAT1Y, val[3]); input_sync(wdata->extension.input); } static int wiimod_bboard_open(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&wdata->state.lock, flags); wdata->state.flags |= WIIPROTO_FLAG_EXT_USED; wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL); spin_unlock_irqrestore(&wdata->state.lock, flags); return 0; } static void wiimod_bboard_close(struct input_dev *dev) { struct wiimote_data *wdata = input_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&wdata->state.lock, flags); wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED; wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL); spin_unlock_irqrestore(&wdata->state.lock, flags); } static int wiimod_bboard_probe(const struct wiimod_ops *ops, struct wiimote_data *wdata) { int ret, i, j; __u8 buf[24], offs; wiimote_cmd_acquire_noint(wdata); ret = wiimote_cmd_read(wdata, 0xa40024, buf, 12); if (ret != 12) { wiimote_cmd_release(wdata); return ret < 0 ? ret : -EIO; } ret = wiimote_cmd_read(wdata, 0xa40024 + 12, buf + 12, 12); if (ret != 12) { wiimote_cmd_release(wdata); return ret < 0 ? ret : -EIO; } wiimote_cmd_release(wdata); offs = 0; for (i = 0; i < 3; ++i) { for (j = 0; j < 4; ++j) { wdata->state.calib_bboard[j][i] = buf[offs]; wdata->state.calib_bboard[j][i] <<= 8; wdata->state.calib_bboard[j][i] |= buf[offs + 1]; offs += 2; } } wdata->extension.input = input_allocate_device(); if (!wdata->extension.input) return -ENOMEM; input_set_drvdata(wdata->extension.input, wdata); wdata->extension.input->open = wiimod_bboard_open; wdata->extension.input->close = wiimod_bboard_close; wdata->extension.input->dev.parent = &wdata->hdev->dev; wdata->extension.input->id.bustype = wdata->hdev->bus; wdata->extension.input->id.vendor = wdata->hdev->vendor; wdata->extension.input->id.product = wdata->hdev->product; wdata->extension.input->id.version = wdata->hdev->version; wdata->extension.input->name = WIIMOTE_NAME " Balance Board"; set_bit(EV_KEY, wdata->extension.input->evbit); set_bit(BTN_A, wdata->extension.input->keybit); set_bit(EV_ABS, wdata->extension.input->evbit); set_bit(ABS_HAT0X, wdata->extension.input->absbit); set_bit(ABS_HAT0Y, wdata->extension.input->absbit); set_bit(ABS_HAT1X, wdata->extension.input->absbit); set_bit(ABS_HAT1Y, wdata->extension.input->absbit); input_set_abs_params(wdata->extension.input, ABS_HAT0X, 0, 65535, 2, 4); input_set_abs_params(wdata->extension.input, ABS_HAT0Y, 0, 65535, 2, 4); input_set_abs_params(wdata->extension.input, ABS_HAT1X, 0, 65535, 2, 4); input_set_abs_params(wdata->extension.input, ABS_HAT1Y, 0, 65535, 2, 4); ret = input_register_device(wdata->extension.input); if (ret) goto err_free; return 0; err_free: input_free_device(wdata->extension.input); wdata->extension.input = NULL; return ret; } static void wiimod_bboard_remove(const struct wiimod_ops *ops, struct wiimote_data *wdata) { if (!wdata->extension.input) return; input_unregister_device(wdata->extension.input); wdata->extension.input = NULL; } static const struct wiimod_ops wiimod_bboard = { .flags = WIIMOD_FLAG_EXT8, .arg = 0, .probe = wiimod_bboard_probe, .remove = wiimod_bboard_remove, .in_keys = wiimod_bboard_in_keys, .in_ext = wiimod_bboard_in_ext, }; /* * Motion Plus */ const struct wiimod_ops wiimod_mp = { .flags = 0, .arg = 0, }; /* module table */ static const struct wiimod_ops wiimod_dummy; const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = { [WIIMOD_KEYS] = &wiimod_keys, [WIIMOD_RUMBLE] = &wiimod_rumble, [WIIMOD_BATTERY] = &wiimod_battery, [WIIMOD_LED1] = &wiimod_leds[0], [WIIMOD_LED2] = &wiimod_leds[1], [WIIMOD_LED3] = &wiimod_leds[2], [WIIMOD_LED4] = &wiimod_leds[3], [WIIMOD_ACCEL] = &wiimod_accel, [WIIMOD_IR] = &wiimod_ir, }; const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM] = { [WIIMOTE_EXT_NONE] = &wiimod_dummy, [WIIMOTE_EXT_UNKNOWN] = &wiimod_dummy, [WIIMOTE_EXT_BALANCE_BOARD] = &wiimod_bboard, };