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HID: wiimote: add sub-device module infrastructure

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To avoid loading all sub-device drivers for every Wii Remote, even though
the required hardware might not be available, we introduce a module layer.

The module layer specifies which sub-devices are available on each
device-type. After device detection, we only load the modules for the
detected device. If module loading fails, we unload everything and mark
the device as WIIMOTE_DEV_UNKNOWN. As long as a device is marked as
"unknown", no sub-devices will be used and the device is considered
unsupported.

All the different sub-devices, including KEYS, RUMBLE, BATTERY, LEDS,
ACCELEROMETER, IR and more will be ported in follow-up patches to the new
module layer.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann
2013-05-05 23:12:51 +02:00
committed by Jiri Kosina
parent d758b1f0c5
commit 27f0694214
4 changed files with 194 additions and 4 deletions
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27
drivers/hid/hid-wiimote.h
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@@ -108,6 +108,33 @@ struct wiimote_data {
struct work_struct init_worker;
};
/* wiimote modules */
enum wiimod_module {
WIIMOD_NUM,
WIIMOD_NULL = WIIMOD_NUM,
};
#define WIIMOD_FLAG_INPUT 0x0001
struct wiimod_ops {
__u16 flags;
unsigned long arg;
int (*probe) (const struct wiimod_ops *ops,
struct wiimote_data *wdata);
void (*remove) (const struct wiimod_ops *ops,
struct wiimote_data *wdata);
void (*in_keys) (struct wiimote_data *wdata, const __u8 *keys);
void (*in_accel) (struct wiimote_data *wdata, const __u8 *accel);
void (*in_ir) (struct wiimote_data *wdata, const __u8 *ir, bool packed,
unsigned int id);
};
extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
/* wiimote requests */
enum wiiproto_reqs {
WIIPROTO_REQ_NULL = 0x0,
WIIPROTO_REQ_RUMBLE = 0x10,