drivers/hid/hid-wiimote.h

   1 #ifndef __HID_WIIMOTE_H
   2 #define __HID_WIIMOTE_H
   3
   4 /*
   5  * HID driver for Nintendo Wiimote devices
   6  * Copyright (c) 2011 David Herrmann
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  */
  15
  16 #include <linux/completion.h>
  17 #include <linux/device.h>
  18 #include <linux/hid.h>
  19 #include <linux/input.h>
  20 #include <linux/leds.h>
  21 #include <linux/module.h>
  22 #include <linux/mutex.h>
  23 #include <linux/power_supply.h>
  24 #include <linux/spinlock.h>
  25
  26 #define WIIMOTE_NAME "Nintendo Wii Remote"
  27 #define WIIMOTE_BUFSIZE 32
  28
  29 #define WIIPROTO_FLAG_LED1              0x01
  30 #define WIIPROTO_FLAG_LED2              0x02
  31 #define WIIPROTO_FLAG_LED3              0x04
  32 #define WIIPROTO_FLAG_LED4              0x08
  33 #define WIIPROTO_FLAG_RUMBLE            0x10
  34 #define WIIPROTO_FLAG_ACCEL             0x20
  35 #define WIIPROTO_FLAG_IR_BASIC          0x40
  36 #define WIIPROTO_FLAG_IR_EXT            0x80
  37 #define WIIPROTO_FLAG_IR_FULL           0xc0 /* IR_BASIC | IR_EXT */
  38 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
  39                                         WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
  40 #define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
  41                                                         WIIPROTO_FLAG_IR_FULL)
  42
  43 /* return flag for led \num */
  44 #define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))
  45
  46 struct wiimote_buf {
  47         __u8 data[HID_MAX_BUFFER_SIZE];
  48         size_t size;
  49 };
  50
  51 struct wiimote_state {
  52         spinlock_t lock;
  53         __u8 flags;
  54         __u8 accel_split[2];
  55
  56         /* synchronous cmd requests */
  57         struct mutex sync;
  58         struct completion ready;
  59         int cmd;
  60         __u32 opt;
  61
  62         /* results of synchronous requests */
  63         __u8 cmd_battery;
  64         __u8 cmd_err;
  65         __u8 *cmd_read_buf;
  66         __u8 cmd_read_size;
  67 };
  68
  69 struct wiimote_data {
  70         struct hid_device *hdev;
  71         struct input_dev *input;
  72         struct led_classdev *leds[4];
  73         struct input_dev *accel;
  74         struct input_dev *ir;
  75         struct power_supply battery;
  76         struct wiimote_ext *ext;
  77
  78         spinlock_t qlock;
  79         __u8 head;
  80         __u8 tail;
  81         struct wiimote_buf outq[WIIMOTE_BUFSIZE];
  82         struct work_struct worker;
  83
  84         struct wiimote_state state;
  85 };
  86
  87 enum wiiproto_reqs {
  88         WIIPROTO_REQ_NULL = 0x0,
  89         WIIPROTO_REQ_RUMBLE = 0x10,
  90         WIIPROTO_REQ_LED = 0x11,
  91         WIIPROTO_REQ_DRM = 0x12,
  92         WIIPROTO_REQ_IR1 = 0x13,
  93         WIIPROTO_REQ_SREQ = 0x15,
  94         WIIPROTO_REQ_WMEM = 0x16,
  95         WIIPROTO_REQ_RMEM = 0x17,
  96         WIIPROTO_REQ_IR2 = 0x1a,
  97         WIIPROTO_REQ_STATUS = 0x20,
  98         WIIPROTO_REQ_DATA = 0x21,
  99         WIIPROTO_REQ_RETURN = 0x22,
 100         WIIPROTO_REQ_DRM_K = 0x30,
 101         WIIPROTO_REQ_DRM_KA = 0x31,
 102         WIIPROTO_REQ_DRM_KE = 0x32,
 103         WIIPROTO_REQ_DRM_KAI = 0x33,
 104         WIIPROTO_REQ_DRM_KEE = 0x34,
 105         WIIPROTO_REQ_DRM_KAE = 0x35,
 106         WIIPROTO_REQ_DRM_KIE = 0x36,
 107         WIIPROTO_REQ_DRM_KAIE = 0x37,
 108         WIIPROTO_REQ_DRM_E = 0x3d,
 109         WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
 110         WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
 111 };
 112
 113 #define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
 114                                                                         dev))
 115
 116 extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
 117 extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 118                                                 const __u8 *wmem, __u8 size);
 119 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
 120                                                         __u8 *rmem, __u8 size);
 121
 122 #ifdef CONFIG_HID_WIIMOTE_EXT
 123
 124 extern int wiiext_init(struct wiimote_data *wdata);
 125 extern void wiiext_deinit(struct wiimote_data *wdata);
 126 extern void wiiext_event(struct wiimote_data *wdata, bool plugged);
 127 extern bool wiiext_active(struct wiimote_data *wdata);
 128
 129 #else
 130
 131 static inline int wiiext_init(void *u) { return 0; }
 132 static inline void wiiext_deinit(void *u) { }
 133 static inline void wiiext_event(void *u, bool p) { }
 134 static inline bool wiiext_active(void *u) { return false; }
 135
 136 #endif
 137
 138 /* requires the state.lock spinlock to be held */
 139 static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
 140                                                                 __u32 opt)
 141 {
 142         return wdata->state.cmd == cmd && wdata->state.opt == opt;
 143 }
 144
 145 /* requires the state.lock spinlock to be held */
 146 static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
 147 {
 148         wdata->state.cmd = WIIPROTO_REQ_NULL;
 149         complete(&wdata->state.ready);
 150 }
 151
 152 static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
 153 {
 154         return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
 155 }
 156
 157 /* requires the state.lock spinlock to be held */
 158 static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
 159                                                                 __u32 opt)
 160 {
 161         INIT_COMPLETION(wdata->state.ready);
 162         wdata->state.cmd = cmd;
 163         wdata->state.opt = opt;
 164 }
 165
 166 static inline void wiimote_cmd_release(struct wiimote_data *wdata)
 167 {
 168         mutex_unlock(&wdata->state.sync);
 169 }
 170
 171 static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
 172 {
 173         int ret;
 174
 175         ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
 176         if (ret < 0)
 177                 return -ERESTARTSYS;
 178         else if (ret == 0)
 179                 return -EIO;
 180         else
 181                 return 0;
 182 }
 183
 184 #endif