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HID: wiimote: Add IR input device

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The IR cam of the wiimote reports 4 trackable lights as absolute values. Since
we can turn the IR cam on and off, we register a separate input device so we can
react on open/close callbacks to save wiimote battery power when IR cam is not
needed.

The cam can be in four states: off, basic, extended and full
The DRM chooser automatically selects a proper DRM that includes all required IR
data so no information is lost.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann 2011-09-06 13:50:30 +02:00 committed by Jiri Kosina
parent efcf918874
commit f363e4f6ab
1 changed files with 67 additions and 4 deletions
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71
drivers/hid/hid-wiimote.c
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@ -38,6 +38,7 @@ struct wiimote_data {
struct input_dev *input;
struct led_classdev *leds[4];
struct input_dev *accel;
struct input_dev *ir;
spinlock_t qlock;
__u8 head;
@ -54,8 +55,13 @@ struct wiimote_data {
#define WIIPROTO_FLAG_LED4 0x08
#define WIIPROTO_FLAG_RUMBLE 0x10
#define WIIPROTO_FLAG_ACCEL 0x20
#define WIIPROTO_FLAG_IR_BASIC 0x40
#define WIIPROTO_FLAG_IR_EXT 0x80
#define WIIPROTO_FLAG_IR_FULL 0xc0 /* IR_BASIC | IR_EXT */
#define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
#define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
WIIPROTO_FLAG_IR_FULL)
/* return flag for led \num */
#define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))
@ -71,6 +77,7 @@ enum wiiproto_reqs {
WIIPROTO_REQ_DRM_KA = 0x31,
WIIPROTO_REQ_DRM_KAI = 0x33,
WIIPROTO_REQ_DRM_KAE = 0x35,
WIIPROTO_REQ_DRM_KIE = 0x36,
WIIPROTO_REQ_DRM_KAIE = 0x37,
WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
@ -248,10 +255,23 @@ static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
*/
static __u8 select_drm(struct wiimote_data *wdata)
{
if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
return WIIPROTO_REQ_DRM_KA;
else
return WIIPROTO_REQ_DRM_K;
__u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
if (ir == WIIPROTO_FLAG_IR_BASIC) {
if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
return WIIPROTO_REQ_DRM_KAIE;
else
return WIIPROTO_REQ_DRM_KIE;
} else if (ir == WIIPROTO_FLAG_IR_EXT) {
return WIIPROTO_REQ_DRM_KAI;
} else if (ir == WIIPROTO_FLAG_IR_FULL) {
return WIIPROTO_REQ_DRM_SKAI1;
} else {
if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
return WIIPROTO_REQ_DRM_KA;
else
return WIIPROTO_REQ_DRM_K;
}
}
static void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
@ -681,6 +701,36 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev)
input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
wdata->ir = input_allocate_device();
if (!wdata->ir)
goto err_ir;
input_set_drvdata(wdata->ir, wdata);
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);
spin_lock_init(&wdata->qlock);
INIT_WORK(&wdata->worker, wiimote_worker);
@ -688,6 +738,8 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev)
return wdata;
err_ir:
input_free_device(wdata->accel);
err_input:
input_free_device(wdata->input);
err:
@ -700,6 +752,7 @@ static void wiimote_destroy(struct wiimote_data *wdata)
wiimote_leds_destroy(wdata);
input_unregister_device(wdata->accel);
input_unregister_device(wdata->ir);
input_unregister_device(wdata->input);
cancel_work_sync(&wdata->worker);
hid_hw_stop(wdata->hdev);
@ -737,6 +790,12 @@ static int wiimote_hid_probe(struct hid_device *hdev,
goto err_stop;
}
ret = input_register_device(wdata->ir);
if (ret) {
hid_err(hdev, "Cannot register input device\n");
goto err_ir;
}
ret = input_register_device(wdata->input);
if (ret) {
hid_err(hdev, "Cannot register input device\n");
@ -761,11 +820,15 @@ static int wiimote_hid_probe(struct hid_device *hdev,
return ret;
err_input:
input_unregister_device(wdata->ir);
wdata->ir = NULL;
err_ir:
input_unregister_device(wdata->accel);
wdata->accel = NULL;
err_stop:
hid_hw_stop(hdev);
err:
input_free_device(wdata->ir);
input_free_device(wdata->accel);
input_free_device(wdata->input);
kfree(wdata);