HID: wiimote: convert IR to module
IR is the last piece that still is handled natively. This patch converts
it into a sub-device module like all other sub-devices. It mainly moves
code and doesn't change semantics.
We also implicitly sync IR data on ir_to_input3 now so the explicit
input_sync() calls are no longer needed.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-wiimote-modules.c b/drivers/hid/hid-wiimote-modules.c
index fbc09c8..5cc593a 100644
--- a/drivers/hid/hid-wiimote-modules.c
+++ b/drivers/hid/hid-wiimote-modules.c
@@ -526,6 +526,268 @@
.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,
+};
+
/* module table */
const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = {
@@ -537,4 +799,5 @@
[WIIMOD_LED3] = &wiimod_leds[2],
[WIIMOD_LED4] = &wiimod_leds[3],
[WIIMOD_ACCEL] = &wiimod_accel,
+ [WIIMOD_IR] = &wiimod_ir,
};