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HID: wiimote: Add extension initializers 

The wiimote extension registers are not fully understood, so we always disable
all extensions on extension-port events. Then we reinitialize and reidentify
them and activate all requested 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 14:12:03 +01:00 committed by Jiri Kosina
parent 82fb1b3958
commit 492ba955c1
1 changed files with 79 additions and 2 deletions
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81
drivers/hid/hid-wiimote-ext.c
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@ -37,30 +37,107 @@ enum wiiext_type {
static void ext_disable(struct wiimote_ext *ext)
{
unsigned long flags;
__u8 wmem = 0x55;
if (!wiimote_cmd_acquire(ext->wdata)) {
wiimote_cmd_write(ext->wdata, 0xa400f0, &wmem, sizeof(wmem));
wiimote_cmd_release(ext->wdata);
}
spin_lock_irqsave(&ext->wdata->state.lock, flags);
ext->motionp = false;
ext->ext_type = WIIEXT_NONE;
wiiproto_req_drm(ext->wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&ext->wdata->state.lock, flags);
}
static bool motionp_read(struct wiimote_ext *ext)
{
return false;
__u8 rmem[2], wmem;
ssize_t ret;
bool avail = false;
if (wiimote_cmd_acquire(ext->wdata))
return false;
/* initialize motion plus */
wmem = 0x55;
ret = wiimote_cmd_write(ext->wdata, 0xa600f0, &wmem, sizeof(wmem));
if (ret)
goto error;
/* read motion plus ID */
ret = wiimote_cmd_read(ext->wdata, 0xa600fe, rmem, 2);
if (ret == 2 || rmem[1] == 0x5)
avail = true;
error:
wiimote_cmd_release(ext->wdata);
return avail;
}
static __u8 ext_read(struct wiimote_ext *ext)
{
return WIIEXT_NONE;
ssize_t ret;
__u8 rmem[2], wmem;
__u8 type = WIIEXT_NONE;
if (!ext->plugged)
return WIIEXT_NONE;
if (wiimote_cmd_acquire(ext->wdata))
return WIIEXT_NONE;
/* initialize extension */
wmem = 0x55;
ret = wiimote_cmd_write(ext->wdata, 0xa400f0, &wmem, sizeof(wmem));
if (!ret) {
/* disable encryption */
wmem = 0x0;
wiimote_cmd_write(ext->wdata, 0xa400fb, &wmem, sizeof(wmem));
}
/* read extension ID */
ret = wiimote_cmd_read(ext->wdata, 0xa400fe, rmem, 2);
if (ret == 2) {
if (rmem[0] == 0 && rmem[1] == 0)
type = WIIEXT_NUNCHUCK;
else if (rmem[0] == 0x01 && rmem[1] == 0x01)
type = WIIEXT_CLASSIC;
}
wiimote_cmd_release(ext->wdata);
return type;
}
static void ext_enable(struct wiimote_ext *ext, bool motionp, __u8 ext_type)
{
unsigned long flags;
__u8 wmem;
int ret;
if (motionp) {
if (wiimote_cmd_acquire(ext->wdata))
return;
if (ext_type == WIIEXT_CLASSIC)
wmem = 0x07;
else if (ext_type == WIIEXT_NUNCHUCK)
wmem = 0x05;
else
wmem = 0x04;
ret = wiimote_cmd_write(ext->wdata, 0xa600fe, &wmem, sizeof(wmem));
wiimote_cmd_release(ext->wdata);
if (ret)
return;
}
spin_lock_irqsave(&ext->wdata->state.lock, flags);
ext->motionp = motionp;
ext->ext_type = ext_type;
wiiproto_req_drm(ext->wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&ext->wdata->state.lock, flags);
}