The iMON PAD controller has a analog stick, which can be switched to
keyboard mode (cursor keys) or work as a crappy mouse.
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
drivers/media/rc/ir-imon-decoder.c | 128 ++++++++++++++++++++++++++++++++++++-
drivers/media/rc/rc-core-priv.h | 3 +
2 files changed, 128 insertions(+), 3 deletions(-)
diff --git a/drivers/media/rc/ir-imon-decoder.c b/drivers/media/rc/ir-imon-decoder.c
index 52ea3b2fda74..c69906ba1a90 100644
--- a/drivers/media/rc/ir-imon-decoder.c
+++ b/drivers/media/rc/ir-imon-decoder.c
@@ -31,9 +31,62 @@ enum imon_state {
STATE_INACTIVE,
STATE_BIT_CHK,
STATE_BIT_START,
- STATE_FINISHED
+ STATE_FINISHED,
+ STATE_ERROR,
};
+static void ir_imon_decode_scancode(struct rc_dev *dev)
+{
+ struct imon_dec *imon = &dev->raw->imon;
+
+ /* Keyboard/Mouse toggle */
+ if (imon->bits == 0x299115b7) {
+ imon->stick_keyboard = !imon->stick_keyboard;
+ return;
+ }
+
+ if ((imon->bits & 0xfc0000ff) == 0x680000b7) {
+ s8 rel_x, rel_y;
+ u8 buf;
+
+ buf = imon->bits >> 16;
+ rel_x = (buf & 0x08) | (buf & 0x10) >> 2 |
+ (buf & 0x20) >> 4 | (buf & 0x40) >> 6;
+ if (imon->bits & 0x02000000)
+ rel_x |= ~0x0f;
+ buf = imon->bits >> 8;
+ rel_y = (buf & 0x08) | (buf & 0x10) >> 2 |
+ (buf & 0x20) >> 4 | (buf & 0x40) >> 6;
+ if (imon->bits & 0x01000000)
+ rel_y |= ~0x0f;
+
+ if (rel_x && rel_y && imon->stick_keyboard) {
+ if (abs(rel_y) > abs(rel_x))
+ imon->bits = rel_y > 0 ? 0x289515b7 :
+ 0x2aa515b7;
+ else
+ imon->bits = rel_x > 0 ? 0x2ba515b7 :
+ 0x29a515b7;
+ }
+
+ if (!imon->stick_keyboard) {
+ input_event(imon->idev, EV_MSC, MSC_SCAN, imon->bits);
+
+ input_report_rel(imon->idev, REL_X, rel_x);
+ input_report_rel(imon->idev, REL_Y, rel_y);
+
+ input_report_key(imon->idev, BTN_LEFT,
+ (imon->bits & 0x00010000) != 0);
+ input_report_key(imon->idev, BTN_RIGHT,
+ (imon->bits & 0x00040000) != 0);
+ input_sync(imon->idev);
+ return;
+ }
+ }
+
+ rc_keydown(dev, RC_PROTO_IMON, imon->bits, 0);
+}
+
/**
* ir_imon_decode() - Decode one iMON pulse or space
* @dev: the struct rc_dev descriptor of the device
@@ -56,6 +109,22 @@ static int ir_imon_decode(struct rc_dev *dev, struct ir_raw_event ev)
data->state, data->count, TO_US(ev.duration),
TO_STR(ev.pulse));
+ /*
+ * Since iMON protocol is a series of bits, if at any point
+ * we encounter an error, make sure that any remaining bits
+ * aren't parsed as a scancode made up of less bits.
+ *
+ * Note that if the stick is held, then the remote repeats
+ * the scancode with about 12ms between them. So, make sure
+ * we have at least 10ms of space after an error. That way,
+ * we're at a new scancode.
+ */
+ if (data->state == STATE_ERROR) {
+ if (!ev.pulse && ev.duration > MS_TO_NS(10))
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+
for (;;) {
if (!geq_margin(ev.duration, IMON_UNIT, IMON_UNIT / 2))
return 0;
@@ -95,7 +164,7 @@ static int ir_imon_decode(struct rc_dev *dev, struct ir_raw_event ev)
case STATE_FINISHED:
if (ev.pulse)
goto err_out;
- rc_keydown(dev, RC_PROTO_IMON, data->bits, 0);
+ ir_imon_decode_scancode(dev);
data->state = STATE_INACTIVE;
break;
}
@@ -107,7 +176,7 @@ static int ir_imon_decode(struct rc_dev *dev, struct ir_raw_event ev)
data->state, data->count, TO_US(ev.duration),
TO_STR(ev.pulse));
- data->state = STATE_INACTIVE;
+ data->state = STATE_ERROR;
return -EINVAL;
}
@@ -165,11 +234,64 @@ static int ir_imon_encode(enum rc_proto protocol, u32 scancode,
return e - events;
}
+static int ir_imon_register(struct rc_dev *dev)
+{
+ struct input_dev *idev;
+ struct imon_dec *imon = &dev->raw->imon;
+ int ret;
+
+ idev = input_allocate_device();
+ if (!idev)
+ return -ENOMEM;
+
+ snprintf(imon->name, sizeof(imon->name),
+ "iMON PAD Stick (%s)", dev->device_name);
+ idev->name = imon->name;
+ idev->phys = dev->input_phys;
+
+ /* Mouse bits */
+ set_bit(EV_REL, idev->evbit);
+ set_bit(EV_KEY, idev->evbit);
+ set_bit(REL_X, idev->relbit);
+ set_bit(REL_Y, idev->relbit);
+ set_bit(BTN_LEFT, idev->keybit);
+ set_bit(BTN_RIGHT, idev->keybit);
+
+ /* Report scancodes too */
+ set_bit(EV_MSC, idev->evbit);
+ set_bit(MSC_SCAN, idev->mscbit);
+
+ input_set_drvdata(idev, imon);
+
+ ret = input_register_device(idev);
+ if (ret < 0) {
+ input_free_device(idev);
+ return -EIO;
+ }
+
+ imon->idev = idev;
+ imon->stick_keyboard = false;
+
+ return 0;
+}
+
+static int ir_imon_unregister(struct rc_dev *dev)
+{
+ struct imon_dec *imon = &dev->raw->imon;
+
+ input_unregister_device(imon->idev);
+ imon->idev = NULL;
+
+ return 0;
+}
+
static struct ir_raw_handler imon_handler = {
.protocols = RC_PROTO_BIT_IMON,
.decode = ir_imon_decode,
.encode = ir_imon_encode,
.carrier = 38000,
+ .raw_register = ir_imon_register,
+ .raw_unregister = ir_imon_unregister,
.min_timeout = IMON_UNIT * IMON_BITS * 2,
};
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index 07ba77fe6a3b..bbb9a7eb6b63 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -126,6 +126,9 @@ struct ir_raw_event_ctrl {
int count;
int last_chk;
unsigned int bits;
+ bool stick_keyboard;
+ struct input_dev *idev;
+ char name[64];
} imon;
};
--
2.14.3
