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hid-wiimote-core.c
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hid-wiimote-core.c
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/*
* HID driver for Nintendo Wiimote devices
* Copyright (c) 2011 David Herrmann
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/power_supply.h>
#include <linux/spinlock.h>
#include "hid-ids.h"
#include "hid-wiimote.h"
enum wiiproto_keys {
WIIPROTO_KEY_LEFT,
WIIPROTO_KEY_RIGHT,
WIIPROTO_KEY_UP,
WIIPROTO_KEY_DOWN,
WIIPROTO_KEY_PLUS,
WIIPROTO_KEY_MINUS,
WIIPROTO_KEY_ONE,
WIIPROTO_KEY_TWO,
WIIPROTO_KEY_A,
WIIPROTO_KEY_B,
WIIPROTO_KEY_HOME,
WIIPROTO_KEY_COUNT
};
static __u16 wiiproto_keymap[] = {
KEY_LEFT, /* WIIPROTO_KEY_LEFT */
KEY_RIGHT, /* WIIPROTO_KEY_RIGHT */
KEY_UP, /* WIIPROTO_KEY_UP */
KEY_DOWN, /* WIIPROTO_KEY_DOWN */
KEY_NEXT, /* WIIPROTO_KEY_PLUS */
KEY_PREVIOUS, /* WIIPROTO_KEY_MINUS */
BTN_1, /* WIIPROTO_KEY_ONE */
BTN_2, /* WIIPROTO_KEY_TWO */
BTN_A, /* WIIPROTO_KEY_A */
BTN_B, /* WIIPROTO_KEY_B */
BTN_MODE, /* WIIPROTO_KEY_HOME */
};
static enum power_supply_property wiimote_battery_props[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_SCOPE,
};
static ssize_t wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
size_t count)
{
__u8 *buf;
ssize_t ret;
if (!hdev->hid_output_raw_report)
return -ENODEV;
buf = kmemdup(buffer, count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
kfree(buf);
return ret;
}
static void wiimote_worker(struct work_struct *work)
{
struct wiimote_data *wdata = container_of(work, struct wiimote_data,
worker);
unsigned long flags;
spin_lock_irqsave(&wdata->qlock, flags);
while (wdata->head != wdata->tail) {
spin_unlock_irqrestore(&wdata->qlock, flags);
wiimote_hid_send(wdata->hdev, wdata->outq[wdata->tail].data,
wdata->outq[wdata->tail].size);
spin_lock_irqsave(&wdata->qlock, flags);
wdata->tail = (wdata->tail + 1) % WIIMOTE_BUFSIZE;
}
spin_unlock_irqrestore(&wdata->qlock, 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");
return;
}
/*
* 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->qlock, flags);
memcpy(wdata->outq[wdata->head].data, buffer, count);
wdata->outq[wdata->head].size = count;
newhead = (wdata->head + 1) % WIIMOTE_BUFSIZE;
if (wdata->head == wdata->tail) {
wdata->head = newhead;
schedule_work(&wdata->worker);
} else if (newhead != wdata->tail) {
wdata->head = newhead;
} else {
hid_warn(wdata->hdev, "Output queue is full");
}
spin_unlock_irqrestore(&wdata->qlock, 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;
}
static 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));
}
static 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.
*/
static __u8 select_drm(struct wiimote_data *wdata)
{
__u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
bool ext = wiiext_active(wdata);
if (ir == WIIPROTO_FLAG_IR_BASIC) {
if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
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_KE;
else
return WIIPROTO_REQ_DRM_K;
}
}
}
void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
{
__u8 cmd[3];
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));
}
static 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));
}
static 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);
}
static 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));
}
static 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;
}
static int wiimote_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wiimote_data *wdata = container_of(psy,
struct wiimote_data, battery);
int ret = 0, state;
unsigned long flags;
if (psp == POWER_SUPPLY_PROP_SCOPE) {
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
return 0;
}
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
wiiproto_req_status(wdata);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
state = wdata->state.cmd_battery;
wiimote_cmd_release(wdata);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = state * 100 / 255;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int wiimote_init_ir(struct wiimote_data *wdata, __u16 mode)
{
int ret;
unsigned long flags;
__u8 format = 0;
static const __u8 data_enable[] = { 0x01 };
static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
0x00, 0xaa, 0x00, 0x64 };
static const __u8 data_sens2[] = { 0x63, 0x03 };
static const __u8 data_fin[] = { 0x08 };
spin_lock_irqsave(&wdata->state.lock, flags);
if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
if (mode == 0) {
wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
wiiproto_req_ir1(wdata, 0);
wiiproto_req_ir2(wdata, 0);
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
/* send PIXEL CLOCK ENABLE cmd first */
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
wiiproto_req_ir1(wdata, 0x06);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
if (ret)
goto unlock;
if (wdata->state.cmd_err) {
ret = -EIO;
goto unlock;
}
/* enable IR LOGIC */
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
wiiproto_req_ir2(wdata, 0x06);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
if (ret)
goto unlock;
if (wdata->state.cmd_err) {
ret = -EIO;
goto unlock;
}
/* enable IR cam but do not make it send data, yet */
ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
sizeof(data_enable));
if (ret)
goto unlock;
/* write first sensitivity block */
ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
sizeof(data_sens1));
if (ret)
goto unlock;
/* write second sensitivity block */
ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
sizeof(data_sens2));
if (ret)
goto unlock;
/* put IR cam into desired state */
switch (mode) {
case WIIPROTO_FLAG_IR_FULL:
format = 5;
break;
case WIIPROTO_FLAG_IR_EXT:
format = 3;
break;
case WIIPROTO_FLAG_IR_BASIC:
format = 1;
break;
}
ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
if (ret)
goto unlock;
/* make IR cam send data */
ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
if (ret)
goto unlock;
/* request new DRM mode compatible to IR mode */
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
unlock:
wiimote_cmd_release(wdata);
return ret;
}
static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)
{
struct wiimote_data *wdata;
struct device *dev = led_dev->dev->parent;
int i;
unsigned long flags;
bool value = false;
wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
for (i = 0; i < 4; ++i) {
if (wdata->leds[i] == led_dev) {
spin_lock_irqsave(&wdata->state.lock, flags);
value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
spin_unlock_irqrestore(&wdata->state.lock, flags);
break;
}
}
return value ? LED_FULL : LED_OFF;
}
static void wiimote_leds_set(struct led_classdev *led_dev,
enum led_brightness value)
{
struct wiimote_data *wdata;
struct device *dev = led_dev->dev->parent;
int i;
unsigned long flags;
__u8 state, flag;
wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
for (i = 0; i < 4; ++i) {
if (wdata->leds[i] == led_dev) {
flag = WIIPROTO_FLAG_LED(i + 1);
spin_lock_irqsave(&wdata->state.lock, flags);
state = wdata->state.flags;
if (value == LED_OFF)
wiiproto_req_leds(wdata, state & ~flag);
else
wiiproto_req_leds(wdata, state | flag);
spin_unlock_irqrestore(&wdata->state.lock, flags);
break;
}
}
}
static int wiimote_ff_play(struct input_dev *dev, void *data,
struct ff_effect *eff)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
__u8 value;
unsigned long flags;
/*
* The wiimote supports only a single rumble motor so if any magnitude
* is set to non-zero then we start the rumble motor. If both are set to
* zero, we stop the rumble motor.
*/
if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
value = 1;
else
value = 0;
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_rumble(wdata, value);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static int wiimote_input_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
return hid_hw_open(wdata->hdev);
}
static void wiimote_input_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
hid_hw_close(wdata->hdev);
}
static int wiimote_accel_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
int ret;
unsigned long flags;
ret = hid_hw_open(wdata->hdev);
if (ret)
return ret;
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_accel(wdata, true);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimote_accel_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_accel(wdata, false);
spin_unlock_irqrestore(&wdata->state.lock, flags);
hid_hw_close(wdata->hdev);
}
static int wiimote_ir_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
int ret;
ret = hid_hw_open(wdata->hdev);
if (ret)
return ret;
ret = wiimote_init_ir(wdata, WIIPROTO_FLAG_IR_BASIC);
if (ret) {
hid_hw_close(wdata->hdev);
return ret;
}
return 0;
}
static void wiimote_ir_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
wiimote_init_ir(wdata, 0);
hid_hw_close(wdata->hdev);
}
static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
{
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_LEFT],
!!(payload[0] & 0x01));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_RIGHT],
!!(payload[0] & 0x02));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_DOWN],
!!(payload[0] & 0x04));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_UP],
!!(payload[0] & 0x08));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_PLUS],
!!(payload[0] & 0x10));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_TWO],
!!(payload[1] & 0x01));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_ONE],
!!(payload[1] & 0x02));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_B],
!!(payload[1] & 0x04));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_A],
!!(payload[1] & 0x08));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_MINUS],
!!(payload[1] & 0x10));
input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_HOME],
!!(payload[1] & 0x80));
input_sync(wdata->input);
}
static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
{
__u16 x, y, z;
if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
return;
/*
* payload is: BB BB XX YY ZZ
* Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
* contain the upper 8 bits of each value. The lower 2 bits are
* contained in the buttons data BB BB.
* Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
* X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
* accel value and bit 6 is the second bit of the Z value.
* The first bit of Y and Z values is not available and always set to 0.
* 0x200 is returned on no movement.
*/
x = payload[2] << 2;
y = payload[3] << 2;
z = payload[4] << 2;
x |= (payload[0] >> 5) & 0x3;
y |= (payload[1] >> 4) & 0x2;
z |= (payload[1] >> 5) & 0x2;
input_report_abs(wdata->accel, ABS_RX, x - 0x200);
input_report_abs(wdata->accel, ABS_RY, y - 0x200);
input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
input_sync(wdata->accel);
}
#define ir_to_input0(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
ABS_HAT0X, ABS_HAT0Y)
#define ir_to_input1(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
ABS_HAT1X, ABS_HAT1Y)
#define ir_to_input2(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
ABS_HAT2X, ABS_HAT2Y)
#define ir_to_input3(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
ABS_HAT3X, ABS_HAT3Y)
static void __ir_to_input(struct wiimote_data *wdata, const __u8 *ir,
bool packed, __u8 xid, __u8 yid)
{
__u16 x, y;
if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
return;
/*
* Basic IR data is encoded into 3 bytes. The first two bytes are the
* upper 8 bit of the X/Y data, the 3rd byte contains the lower 2 bits
* of both.
* If data is packed, then the 3rd byte is put first and slightly
* reordered. This allows to interleave packed and non-packed data to
* have two IR sets in 5 bytes instead of 6.
* The resulting 10bit X/Y values are passed to the ABS_HATXY input dev.
*/
if (packed) {
x = ir[1] << 2;
y = ir[2] << 2;
x |= ir[0] & 0x3;
y |= (ir[0] >> 2) & 0x3;
} else {
x = ir[0] << 2;
y = ir[1] << 2;
x |= (ir[2] >> 4) & 0x3;
y |= (ir[2] >> 6) & 0x3;
}
input_report_abs(wdata->ir, xid, x);
input_report_abs(wdata->ir, yid, y);
}
static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
/* on status reports the drm is reset so we need to resend the drm */
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
wiiext_event(wdata, payload[2] & 0x02);
if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0)) {
wdata->state.cmd_battery = payload[5];
wiimote_cmd_complete(wdata);
}
}
static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
{
__u16 offset = payload[3] << 8 | payload[4];
__u8 size = (payload[2] >> 4) + 1;
__u8 err = payload[2] & 0x0f;
handler_keys(wdata, payload);
if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_RMEM, offset)) {
if (err)
size = 0;
else if (size > wdata->state.cmd_read_size)
size = wdata->state.cmd_read_size;
wdata->state.cmd_read_size = size;
if (wdata->state.cmd_read_buf)
memcpy(wdata->state.cmd_read_buf, &payload[5], size);
wiimote_cmd_complete(wdata);
}
}
static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
{
__u8 err = payload[3];
__u8 cmd = payload[2];
handler_keys(wdata, payload);
if (wiimote_cmd_pending(wdata, cmd, 0)) {
wdata->state.cmd_err = err;
wiimote_cmd_complete(wdata);
} else if (err) {
hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
cmd);
}
}
static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
handler_accel(wdata, payload);
}
static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
wiiext_handle(wdata, &payload[2]);
}
static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
handler_accel(wdata, payload);
ir_to_input0(wdata, &payload[5], false);
ir_to_input1(wdata, &payload[8], false);
ir_to_input2(wdata, &payload[11], false);
ir_to_input3(wdata, &payload[14], false);
input_sync(wdata->ir);
}
static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
wiiext_handle(wdata, &payload[2]);
}
static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
ir_to_input0(wdata, &payload[2], false);
ir_to_input1(wdata, &payload[4], true);
ir_to_input2(wdata, &payload[7], false);
ir_to_input3(wdata, &payload[9], true);
input_sync(wdata->ir);
wiiext_handle(wdata, &payload[12]);
}
static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
handler_accel(wdata, payload);
wiiext_handle(wdata, &payload[5]);
}
static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
handler_accel(wdata, payload);
ir_to_input0(wdata, &payload[5], false);
ir_to_input1(wdata, &payload[7], true);
ir_to_input2(wdata, &payload[10], false);
ir_to_input3(wdata, &payload[12], true);
input_sync(wdata->ir);
wiiext_handle(wdata, &payload[15]);
}
static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
{
wiiext_handle(wdata, payload);
}
static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
{
handler_keys(wdata, payload);
wdata->state.accel_split[0] = payload[2];
wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
ir_to_input0(wdata, &payload[3], false);
ir_to_input1(wdata, &payload[12], false);
input_sync(wdata->ir);
}
static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
{
__u8 buf[5];
handler_keys(wdata, payload);
wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
buf[0] = 0;
buf[1] = 0;
buf[2] = wdata->state.accel_split[0];
buf[3] = payload[2];
buf[4] = wdata->state.accel_split[1];
handler_accel(wdata, buf);
ir_to_input2(wdata, &payload[3], false);
ir_to_input3(wdata, &payload[12], false);
input_sync(wdata->ir);
}
struct wiiproto_handler {
__u8 id;
size_t size;
void (*func)(struct wiimote_data *wdata, const __u8 *payload);
};
static struct wiiproto_handler handlers[] = {
{ .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
{ .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
{ .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
{ .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
{ .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
{ .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
{ .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
{ .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
{ .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
{ .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
{ .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
{ .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
{ .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
{ .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
{ .id = 0 }
};
static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
u8 *raw_data, int size)
{
struct wiimote_data *wdata = hid_get_drvdata(hdev);
struct wiiproto_handler *h;
int i;
unsigned long flags;
bool handled = false;
if (size < 1)
return -EINVAL;
spin_lock_irqsave(&wdata->state.lock, flags);
for (i = 0; handlers[i].id; ++i) {
h = &handlers[i];
if (h->id == raw_data[0] && h->size < size) {
h->func(wdata, &raw_data[1]);
handled = true;
}
}
if (!handled)
hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
size);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;