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hid-wiimote-core.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HID driver for Nintendo Wii / Wii U peripherals
* Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
*/
/*
*/
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include "hid-ids.h"
#include "hid-wiimote.h"
/* output queue handling */
static int wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
size_t count)
{
__u8 *buf;
int ret;
if (!hdev->ll_driver->output_report)
return -ENODEV;
buf = kmemdup(buffer, count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = hid_hw_output_report(hdev, buf, count);
kfree(buf);
return ret;
}
static void wiimote_queue_worker(struct work_struct *work)
{
struct wiimote_queue *queue = container_of(work, struct wiimote_queue,
worker);
struct wiimote_data *wdata = container_of(queue, struct wiimote_data,
queue);
unsigned long flags;
int ret;
spin_lock_irqsave(&wdata->queue.lock, flags);
while (wdata->queue.head != wdata->queue.tail) {
spin_unlock_irqrestore(&wdata->queue.lock, flags);
ret = wiimote_hid_send(wdata->hdev,
wdata->queue.outq[wdata->queue.tail].data,
wdata->queue.outq[wdata->queue.tail].size);
if (ret < 0) {
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_abort(wdata);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
spin_lock_irqsave(&wdata->queue.lock, flags);
wdata->queue.tail = (wdata->queue.tail + 1) % WIIMOTE_BUFSIZE;
}
spin_unlock_irqrestore(&wdata->queue.lock, flags);
}
static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
size_t count)
{
unsigned long flags;
__u8 newhead;
if (count > HID_MAX_BUFFER_SIZE) {
hid_warn(wdata->hdev, "Sending too large output report\n");
spin_lock_irqsave(&wdata->queue.lock, flags);
goto out_error;
}
/*
* Copy new request into our output queue and check whether the
* queue is full. If it is full, discard this request.
* If it is empty we need to start a new worker that will
* send out the buffer to the hid device.
* If the queue is not empty, then there must be a worker
* that is currently sending out our buffer and this worker
* will reschedule itself until the queue is empty.
*/
spin_lock_irqsave(&wdata->queue.lock, flags);
memcpy(wdata->queue.outq[wdata->queue.head].data, buffer, count);
wdata->queue.outq[wdata->queue.head].size = count;
newhead = (wdata->queue.head + 1) % WIIMOTE_BUFSIZE;
if (wdata->queue.head == wdata->queue.tail) {
wdata->queue.head = newhead;
schedule_work(&wdata->queue.worker);
} else if (newhead != wdata->queue.tail) {
wdata->queue.head = newhead;
} else {
hid_warn(wdata->hdev, "Output queue is full");
goto out_error;
}
goto out_unlock;
out_error:
wiimote_cmd_abort(wdata);
out_unlock:
spin_unlock_irqrestore(&wdata->queue.lock, flags);
}
/*
* This sets the rumble bit on the given output report if rumble is
* currently enabled.
* \cmd1 must point to the second byte in the output report => &cmd[1]
* This must be called on nearly every output report before passing it
* into the output queue!
*/
static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
{
if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
*cmd1 |= 0x01;
}
void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
{
__u8 cmd[2];
rumble = !!rumble;
if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
return;
if (rumble)
wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
else
wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
cmd[0] = WIIPROTO_REQ_RUMBLE;
cmd[1] = 0;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
{
__u8 cmd[2];
leds &= WIIPROTO_FLAGS_LEDS;
if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
return;
wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
cmd[0] = WIIPROTO_REQ_LED;
cmd[1] = 0;
if (leds & WIIPROTO_FLAG_LED1)
cmd[1] |= 0x10;
if (leds & WIIPROTO_FLAG_LED2)
cmd[1] |= 0x20;
if (leds & WIIPROTO_FLAG_LED3)
cmd[1] |= 0x40;
if (leds & WIIPROTO_FLAG_LED4)
cmd[1] |= 0x80;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
/*
* Check what peripherals of the wiimote are currently
* active and select a proper DRM that supports all of
* the requested data inputs.
*
* Not all combinations are actually supported. The following
* combinations work only with limitations:
* - IR cam in extended or full mode disables any data transmission
* of extension controllers. There is no DRM mode that supports
* extension bytes plus extended/full IR.
* - IR cam with accelerometer and extension *_EXT8 is not supported.
* However, all extensions that need *_EXT8 are devices that don't
* support IR cameras. Hence, this shouldn't happen under normal
* operation.
* - *_EXT16 is only supported in combination with buttons and
* accelerometer. No IR or similar can be active simultaneously. As
* above, all modules that require it are mutually exclusive with
* IR/etc. so this doesn't matter.
*/
static __u8 select_drm(struct wiimote_data *wdata)
{
__u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
bool ext;
ext = (wdata->state.flags & WIIPROTO_FLAG_EXT_USED) ||
(wdata->state.flags & WIIPROTO_FLAG_MP_USED);
/* some 3rd-party balance-boards are hard-coded to KEE, *sigh* */
if (wdata->state.devtype == WIIMOTE_DEV_BALANCE_BOARD) {
if (ext)
return WIIPROTO_REQ_DRM_KEE;
else
return WIIPROTO_REQ_DRM_K;
}
if (ir == WIIPROTO_FLAG_IR_BASIC) {
if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
/* GEN10 and ealier devices bind IR formats to DRMs.
* Hence, we cannot use DRM_KAI here as it might be
* bound to IR_EXT. Use DRM_KAIE unconditionally so we
* work with all devices and our parsers can use the
* fixed formats, too. */
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) {
if (ext)
return WIIPROTO_REQ_DRM_KAE;
else
return WIIPROTO_REQ_DRM_KA;
} else {
if (ext)
return WIIPROTO_REQ_DRM_KEE;
else
return WIIPROTO_REQ_DRM_K;
}
}
}
void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
{
__u8 cmd[3];
if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
drm = wdata->state.drm;
else if (drm == WIIPROTO_REQ_NULL)
drm = select_drm(wdata);
cmd[0] = WIIPROTO_REQ_DRM;
cmd[1] = 0;
cmd[2] = drm;
wdata->state.drm = drm;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
void wiiproto_req_status(struct wiimote_data *wdata)
{
__u8 cmd[2];
cmd[0] = WIIPROTO_REQ_SREQ;
cmd[1] = 0;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
{
accel = !!accel;
if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
return;
if (accel)
wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
else
wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
}
void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
{
__u8 cmd[2];
cmd[0] = WIIPROTO_REQ_IR1;
cmd[1] = flags;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
{
__u8 cmd[2];
cmd[0] = WIIPROTO_REQ_IR2;
cmd[1] = flags;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
#define wiiproto_req_wreg(wdata, os, buf, sz) \
wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
#define wiiproto_req_weeprom(wdata, os, buf, sz) \
wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
__u32 offset, const __u8 *buf, __u8 size)
{
__u8 cmd[22];
if (size > 16 || size == 0) {
hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
return;
}
memset(cmd, 0, sizeof(cmd));
cmd[0] = WIIPROTO_REQ_WMEM;
cmd[2] = (offset >> 16) & 0xff;
cmd[3] = (offset >> 8) & 0xff;
cmd[4] = offset & 0xff;
cmd[5] = size;
memcpy(&cmd[6], buf, size);
if (!eeprom)
cmd[1] |= 0x04;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
__u16 size)
{
__u8 cmd[7];
if (size == 0) {
hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
return;
}
cmd[0] = WIIPROTO_REQ_RMEM;
cmd[1] = 0;
cmd[2] = (offset >> 16) & 0xff;
cmd[3] = (offset >> 8) & 0xff;
cmd[4] = offset & 0xff;
cmd[5] = (size >> 8) & 0xff;
cmd[6] = size & 0xff;
if (!eeprom)
cmd[1] |= 0x04;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
/* requries the cmd-mutex to be held */
int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
const __u8 *wmem, __u8 size)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
wiiproto_req_wreg(wdata, offset, wmem, size);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
if (!ret && wdata->state.cmd_err)
ret = -EIO;
return ret;
}
/* requries the cmd-mutex to be held */
ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
__u8 size)
{
unsigned long flags;
ssize_t ret;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.cmd_read_size = size;
wdata->state.cmd_read_buf = rmem;
wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, offset & 0xffff);
wiiproto_req_rreg(wdata, offset, size);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.cmd_read_buf = NULL;
spin_unlock_irqrestore(&wdata->state.lock, flags);
if (!ret) {
if (wdata->state.cmd_read_size == 0)
ret = -EIO;
else
ret = wdata->state.cmd_read_size;
}
return ret;
}
/* requires the cmd-mutex to be held */
static int wiimote_cmd_init_ext(struct wiimote_data *wdata)
{
__u8 wmem;
int ret;
/* initialize extension */
wmem = 0x55;
ret = wiimote_cmd_write(wdata, 0xa400f0, &wmem, sizeof(wmem));
if (ret)
return ret;
/* disable default encryption */
wmem = 0x0;
ret = wiimote_cmd_write(wdata, 0xa400fb, &wmem, sizeof(wmem));
if (ret)
return ret;
return 0;
}
/* requires the cmd-mutex to be held */
static __u8 wiimote_cmd_read_ext(struct wiimote_data *wdata, __u8 *rmem)
{
int ret;
/* read extension ID */
ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
if (ret != 6)
return WIIMOTE_EXT_NONE;
hid_dbg(wdata->hdev, "extension ID: %6phC\n", rmem);
if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
return WIIMOTE_EXT_NONE;
if (rmem[4] == 0x00 && rmem[5] == 0x00)
return WIIMOTE_EXT_NUNCHUK;
if (rmem[4] == 0x01 && rmem[5] == 0x01)
return WIIMOTE_EXT_CLASSIC_CONTROLLER;
if (rmem[4] == 0x04 && rmem[5] == 0x02)
return WIIMOTE_EXT_BALANCE_BOARD;
if (rmem[4] == 0x01 && rmem[5] == 0x20)
return WIIMOTE_EXT_PRO_CONTROLLER;
if (rmem[0] == 0x01 && rmem[1] == 0x00 &&
rmem[4] == 0x01 && rmem[5] == 0x03)
return WIIMOTE_EXT_DRUMS;
if (rmem[0] == 0x00 && rmem[1] == 0x00 &&
rmem[4] == 0x01 && rmem[5] == 0x03)
return WIIMOTE_EXT_GUITAR;
return WIIMOTE_EXT_UNKNOWN;
}
/* requires the cmd-mutex to be held */
static int wiimote_cmd_init_mp(struct wiimote_data *wdata)
{
__u8 wmem;
int ret;
/* initialize MP */
wmem = 0x55;
ret = wiimote_cmd_write(wdata, 0xa600f0, &wmem, sizeof(wmem));
if (ret)
return ret;
/* disable default encryption */
wmem = 0x0;
ret = wiimote_cmd_write(wdata, 0xa600fb, &wmem, sizeof(wmem));
if (ret)
return ret;
return 0;
}
/* requires the cmd-mutex to be held */
static bool wiimote_cmd_map_mp(struct wiimote_data *wdata, __u8 exttype)
{
__u8 wmem;
/* map MP with correct pass-through mode */
switch (exttype) {
case WIIMOTE_EXT_CLASSIC_CONTROLLER:
case WIIMOTE_EXT_DRUMS:
case WIIMOTE_EXT_GUITAR:
wmem = 0x07;
break;
case WIIMOTE_EXT_NUNCHUK:
wmem = 0x05;
break;
default:
wmem = 0x04;
break;
}
return wiimote_cmd_write(wdata, 0xa600fe, &wmem, sizeof(wmem));
}
/* requires the cmd-mutex to be held */
static bool wiimote_cmd_read_mp(struct wiimote_data *wdata, __u8 *rmem)
{
int ret;
/* read motion plus ID */
ret = wiimote_cmd_read(wdata, 0xa600fa, rmem, 6);
if (ret != 6)
return false;
hid_dbg(wdata->hdev, "motion plus ID: %6phC\n", rmem);
if (rmem[5] == 0x05)
return true;
hid_info(wdata->hdev, "unknown motion plus ID: %6phC\n", rmem);
return false;
}
/* requires the cmd-mutex to be held */
static __u8 wiimote_cmd_read_mp_mapped(struct wiimote_data *wdata)
{
int ret;
__u8 rmem[6];
/* read motion plus ID */
ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
if (ret != 6)
return WIIMOTE_MP_NONE;
hid_dbg(wdata->hdev, "mapped motion plus ID: %6phC\n", rmem);
if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
return WIIMOTE_MP_NONE;
if (rmem[4] == 0x04 && rmem[5] == 0x05)
return WIIMOTE_MP_SINGLE;
else if (rmem[4] == 0x05 && rmem[5] == 0x05)
return WIIMOTE_MP_PASSTHROUGH_NUNCHUK;
else if (rmem[4] == 0x07 && rmem[5] == 0x05)
return WIIMOTE_MP_PASSTHROUGH_CLASSIC;
return WIIMOTE_MP_UNKNOWN;
}
/* device module handling */
static const __u8 * const wiimote_devtype_mods[WIIMOTE_DEV_NUM] = {
[WIIMOTE_DEV_PENDING] = (const __u8[]){
WIIMOD_NULL,
},
[WIIMOTE_DEV_UNKNOWN] = (const __u8[]){
WIIMOD_NO_MP,
WIIMOD_NULL,
},
[WIIMOTE_DEV_GENERIC] = (const __u8[]){
WIIMOD_KEYS,
WIIMOD_RUMBLE,
WIIMOD_BATTERY,
WIIMOD_LED1,
WIIMOD_LED2,
WIIMOD_LED3,
WIIMOD_LED4,
WIIMOD_ACCEL,
WIIMOD_IR,
WIIMOD_NULL,
},
[WIIMOTE_DEV_GEN10] = (const __u8[]){
WIIMOD_KEYS,
WIIMOD_RUMBLE,
WIIMOD_BATTERY,
WIIMOD_LED1,
WIIMOD_LED2,
WIIMOD_LED3,
WIIMOD_LED4,
WIIMOD_ACCEL,
WIIMOD_IR,
WIIMOD_NULL,
},
[WIIMOTE_DEV_GEN20] = (const __u8[]){
WIIMOD_KEYS,
WIIMOD_RUMBLE,
WIIMOD_BATTERY,
WIIMOD_LED1,
WIIMOD_LED2,
WIIMOD_LED3,
WIIMOD_LED4,
WIIMOD_ACCEL,
WIIMOD_IR,
WIIMOD_BUILTIN_MP,
WIIMOD_NULL,
},
[WIIMOTE_DEV_BALANCE_BOARD] = (const __u8[]) {
WIIMOD_BATTERY,
WIIMOD_LED1,
WIIMOD_NO_MP,
WIIMOD_NULL,
},
[WIIMOTE_DEV_PRO_CONTROLLER] = (const __u8[]) {
WIIMOD_BATTERY,
WIIMOD_LED1,
WIIMOD_LED2,
WIIMOD_LED3,
WIIMOD_LED4,
WIIMOD_NO_MP,
WIIMOD_NULL,
},
};
static void wiimote_modules_load(struct wiimote_data *wdata,
unsigned int devtype)
{
bool need_input = false;
const __u8 *mods, *iter;
const struct wiimod_ops *ops;
int ret;
mods = wiimote_devtype_mods[devtype];
for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
if (wiimod_table[*iter]->flags & WIIMOD_FLAG_INPUT) {
need_input = true;
break;
}
}
if (need_input) {
wdata->input = input_allocate_device();
if (!wdata->input)
return;
input_set_drvdata(wdata->input, wdata);
wdata->input->dev.parent = &wdata->hdev->dev;
wdata->input->id.bustype = wdata->hdev->bus;
wdata->input->id.vendor = wdata->hdev->vendor;
wdata->input->id.product = wdata->hdev->product;
wdata->input->id.version = wdata->hdev->version;
wdata->input->name = WIIMOTE_NAME;
}
for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
ops = wiimod_table[*iter];
if (!ops->probe)
continue;
ret = ops->probe(ops, wdata);
if (ret)
goto error;
}
if (wdata->input) {
ret = input_register_device(wdata->input);
if (ret)
goto error;
}
spin_lock_irq(&wdata->state.lock);
wdata->state.devtype = devtype;
spin_unlock_irq(&wdata->state.lock);
return;
error:
for ( ; iter-- != mods; ) {
ops = wiimod_table[*iter];
if (ops->remove)
ops->remove(ops, wdata);
}
if (wdata->input) {
input_free_device(wdata->input);
wdata->input = NULL;
}
}
static void wiimote_modules_unload(struct wiimote_data *wdata)
{
const __u8 *mods, *iter;
const struct wiimod_ops *ops;
unsigned long flags;
mods = wiimote_devtype_mods[wdata->state.devtype];
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
spin_unlock_irqrestore(&wdata->state.lock, flags);
/* find end of list */
for (iter = mods; *iter != WIIMOD_NULL; ++iter)
/* empty */ ;
if (wdata->input) {
input_get_device(wdata->input);
input_unregister_device(wdata->input);
}
for ( ; iter-- != mods; ) {
ops = wiimod_table[*iter];
if (ops->remove)
ops->remove(ops, wdata);
}
if (wdata->input) {
input_put_device(wdata->input);
wdata->input = NULL;
}
}
/* device extension handling */
static void wiimote_ext_load(struct wiimote_data *wdata, unsigned int ext)
{
unsigned long flags;
const struct wiimod_ops *ops;
int ret;
ops = wiimod_ext_table[ext];
if (ops->probe) {
ret = ops->probe(ops, wdata);
if (ret)
ext = WIIMOTE_EXT_UNKNOWN;
}
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.exttype = ext;
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static void wiimote_ext_unload(struct wiimote_data *wdata)
{
unsigned long flags;
const struct wiimod_ops *ops;
ops = wiimod_ext_table[wdata->state.exttype];
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.exttype = WIIMOTE_EXT_UNKNOWN;
wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
spin_unlock_irqrestore(&wdata->state.lock, flags);
if (ops->remove)
ops->remove(ops, wdata);
}
static void wiimote_mp_load(struct wiimote_data *wdata)
{
unsigned long flags;
const struct wiimod_ops *ops;
int ret;
__u8 mode = 2;
ops = &wiimod_mp;
if (ops->probe) {
ret = ops->probe(ops, wdata);
if (ret)
mode = 1;
}
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.mp = mode;
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static void wiimote_mp_unload(struct wiimote_data *wdata)
{
unsigned long flags;
const struct wiimod_ops *ops;
if (wdata->state.mp < 2)
return;
ops = &wiimod_mp;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.mp = 0;
wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
spin_unlock_irqrestore(&wdata->state.lock, flags);
if (ops->remove)
ops->remove(ops, wdata);
}
/* device (re-)initialization and detection */
static const char *wiimote_devtype_names[WIIMOTE_DEV_NUM] = {
[WIIMOTE_DEV_PENDING] = "Pending",
[WIIMOTE_DEV_UNKNOWN] = "Unknown",
[WIIMOTE_DEV_GENERIC] = "Generic",
[WIIMOTE_DEV_GEN10] = "Nintendo Wii Remote (Gen 1)",
[WIIMOTE_DEV_GEN20] = "Nintendo Wii Remote Plus (Gen 2)",
[WIIMOTE_DEV_BALANCE_BOARD] = "Nintendo Wii Balance Board",
[WIIMOTE_DEV_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
};
/* Try to guess the device type based on all collected information. We
* first try to detect by static extension types, then VID/PID and the
* device name. If we cannot detect the device, we use
* WIIMOTE_DEV_GENERIC so all modules will get probed on the device. */
static void wiimote_init_set_type(struct wiimote_data *wdata,
__u8 exttype)
{
__u8 devtype = WIIMOTE_DEV_GENERIC;
__u16 vendor, product;
const char *name;
vendor = wdata->hdev->vendor;
product = wdata->hdev->product;
name = wdata->hdev->name;
if (exttype == WIIMOTE_EXT_BALANCE_BOARD) {
devtype = WIIMOTE_DEV_BALANCE_BOARD;
goto done;
} else if (exttype == WIIMOTE_EXT_PRO_CONTROLLER) {
devtype = WIIMOTE_DEV_PRO_CONTROLLER;
goto done;
}
if (!strcmp(name, "Nintendo RVL-CNT-01")) {
devtype = WIIMOTE_DEV_GEN10;
goto done;
} else if (!strcmp(name, "Nintendo RVL-CNT-01-TR")) {
devtype = WIIMOTE_DEV_GEN20;
goto done;
} else if (!strcmp(name, "Nintendo RVL-WBC-01")) {
devtype = WIIMOTE_DEV_BALANCE_BOARD;
goto done;
} else if (!strcmp(name, "Nintendo RVL-CNT-01-UC")) {
devtype = WIIMOTE_DEV_PRO_CONTROLLER;
goto done;
}
if (vendor == USB_VENDOR_ID_NINTENDO) {
if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE) {
devtype = WIIMOTE_DEV_GEN10;
goto done;
} else if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE2) {
devtype = WIIMOTE_DEV_GEN20;
goto done;
}
}
done:
if (devtype == WIIMOTE_DEV_GENERIC)
hid_info(wdata->hdev, "cannot detect device; NAME: %s VID: %04x PID: %04x EXT: %04x\n",
name, vendor, product, exttype);
else
hid_info(wdata->hdev, "detected device: %s\n",
wiimote_devtype_names[devtype]);
wiimote_modules_load(wdata, devtype);
}
static void wiimote_init_detect(struct wiimote_data *wdata)
{
__u8 exttype = WIIMOTE_EXT_NONE, extdata[6];
bool ext;
int ret;
wiimote_cmd_acquire_noint(wdata);
spin_lock_irq(&wdata->state.lock);
wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
wiiproto_req_status(wdata);
spin_unlock_irq(&wdata->state.lock);
ret = wiimote_cmd_wait_noint(wdata);
if (ret)
goto out_release;
spin_lock_irq(&wdata->state.lock);
ext = wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED;
spin_unlock_irq(&wdata->state.lock);
if (!ext)
goto out_release;
wiimote_cmd_init_ext(wdata);
exttype = wiimote_cmd_read_ext(wdata, extdata);
out_release:
wiimote_cmd_release(wdata);
wiimote_init_set_type(wdata, exttype);
/* schedule MP timer */
spin_lock_irq(&wdata->state.lock);
if (!(wdata->state.flags & WIIPROTO_FLAG_BUILTIN_MP) &&
!(wdata->state.flags & WIIPROTO_FLAG_NO_MP))
mod_timer(&wdata->timer, jiffies + HZ * 4);
spin_unlock_irq(&wdata->state.lock);
}
/*
* MP hotplug events are not generated by the wiimote. Therefore, we need
* polling to detect it. We use a 4s interval for polling MP registers. This
* seems reasonable considering applications can trigger it manually via
* sysfs requests.
*/
static void wiimote_init_poll_mp(struct wiimote_data *wdata)
{
bool mp;
__u8 mpdata[6];
wiimote_cmd_acquire_noint(wdata);
wiimote_cmd_init_mp(wdata);
mp = wiimote_cmd_read_mp(wdata, mpdata);
wiimote_cmd_release(wdata);
/* load/unload MP module if it changed */
if (mp) {
if (!wdata->state.mp) {
hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
wiimote_mp_load(wdata);
}
} else if (wdata->state.mp) {
wiimote_mp_unload(wdata);
}
mod_timer(&wdata->timer, jiffies + HZ * 4);
}
/*
* Check whether the wiimote is in the expected state. The extension registers
* may change during hotplug and initialization so we might get hotplug events
* that we caused by remapping some memory.
* We use some heuristics here to check known states. If the wiimote is in the
* expected state, we can ignore the hotplug event.
*
* Returns "true" if the device is in expected state, "false" if we should
* redo hotplug handling and extension initialization.
*/
static bool wiimote_init_check(struct wiimote_data *wdata)
{
__u32 flags;
__u8 type, data[6];
bool ret, poll_mp;
spin_lock_irq(&wdata->state.lock);
flags = wdata->state.flags;
spin_unlock_irq(&wdata->state.lock);
wiimote_cmd_acquire_noint(wdata);
/* If MP is used and active, but the extension is not, we expect:
* read_mp_mapped() == WIIMOTE_MP_SINGLE
* state.flags == !EXT_ACTIVE && !MP_PLUGGED && MP_ACTIVE
* We do not check EXT_PLUGGED because it might change during
* initialization of MP without extensions.
* - If MP is unplugged/replugged, read_mp_mapped() fails
* - If EXT is plugged, MP_PLUGGED will get set */
if (wdata->state.exttype == WIIMOTE_EXT_NONE &&
wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
type = wiimote_cmd_read_mp_mapped(wdata);
ret = type == WIIMOTE_MP_SINGLE;
spin_lock_irq(&wdata->state.lock);
ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED);
ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
spin_unlock_irq(&wdata->state.lock);
if (!ret)
hid_dbg(wdata->hdev, "state left: !EXT && MP\n");
/* while MP is mapped, we get EXT_PLUGGED events */
poll_mp = false;
goto out_release;
}
/* If MP is unused, but the extension port is used, we expect:
* read_ext == state.exttype
* state.flags == !MP_ACTIVE && EXT_ACTIVE
* - If MP is plugged/unplugged, our timer detects it
* - If EXT is unplugged/replugged, EXT_ACTIVE will become unset */
if (!(flags & WIIPROTO_FLAG_MP_USED) &&
wdata->state.exttype != WIIMOTE_EXT_NONE) {
type = wiimote_cmd_read_ext(wdata, data);
ret = type == wdata->state.exttype;
spin_lock_irq(&wdata->state.lock);
ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
spin_unlock_irq(&wdata->state.lock);
if (!ret)
hid_dbg(wdata->hdev, "state left: EXT && !MP\n");
/* poll MP for hotplug events */
poll_mp = true;