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HID: wiimote: Add extension initializer stubs

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Add stub functions to read and identify extensions and then initialize all
connected extensions.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann 2011-11-17 14:12:02 +01:00 committed by Jiri Kosina
parent cb99221ba7
commit 82fb1b3958
1 changed files with 38 additions and 0 deletions
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38
drivers/hid/hid-wiimote-ext.c
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@ -33,10 +33,48 @@ enum wiiext_type {
WIIEXT_NUNCHUCK, /* Nintendo nunchuck controller */
};
/* diable all extensions */
static void ext_disable(struct wiimote_ext *ext)
{
unsigned long flags;
spin_lock_irqsave(&ext->wdata->state.lock, flags);
ext->motionp = false;
ext->ext_type = WIIEXT_NONE;
spin_unlock_irqrestore(&ext->wdata->state.lock, flags);
}
static bool motionp_read(struct wiimote_ext *ext)
{
return false;
}
static __u8 ext_read(struct wiimote_ext *ext)
{
return WIIEXT_NONE;
}
static void ext_enable(struct wiimote_ext *ext, bool motionp, __u8 ext_type)
{
unsigned long flags;
spin_lock_irqsave(&ext->wdata->state.lock, flags);
ext->motionp = motionp;
ext->ext_type = ext_type;
spin_unlock_irqrestore(&ext->wdata->state.lock, flags);
}
static void wiiext_worker(struct work_struct *work)
{
struct wiimote_ext *ext = container_of(work, struct wiimote_ext,
worker);
bool motionp;
__u8 ext_type;
ext_disable(ext);
motionp = motionp_read(ext);
ext_type = ext_read(ext);
ext_enable(ext, motionp, ext_type);
}
/* schedule work only once, otherwise mark for reschedule */