drivers/input/joystick/maplecontrol.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *      SEGA Dreamcast controller driver
   4  *      Based on drivers/usb/iforce.c
   5  *
   6  *      Copyright Yaegashi Takeshi, 2001
   7  *      Adrian McMenamin, 2008 - 2009
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/slab.h>
  12 #include <linux/input.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/timer.h>
  16 #include <linux/maple.h>
  17
  18 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
  19 MODULE_DESCRIPTION("SEGA Dreamcast controller driver");
  20 MODULE_LICENSE("GPL");
  21
  22 struct dc_pad {
  23         struct input_dev *dev;
  24         struct maple_device *mdev;
  25 };
  26
  27 static void dc_pad_callback(struct mapleq *mq)
  28 {
  29         unsigned short buttons;
  30         struct maple_device *mapledev = mq->dev;
  31         struct dc_pad *pad = maple_get_drvdata(mapledev);
  32         struct input_dev *dev = pad->dev;
  33         unsigned char *res = mq->recvbuf->buf;
  34
  35         buttons = ~le16_to_cpup((__le16 *)(res + 8));
  36
  37         input_report_abs(dev, ABS_HAT0Y,
  38                 (buttons & 0x0010 ? -1 : 0) + (buttons & 0x0020 ? 1 : 0));
  39         input_report_abs(dev, ABS_HAT0X,
  40                 (buttons & 0x0040 ? -1 : 0) + (buttons & 0x0080 ? 1 : 0));
  41         input_report_abs(dev, ABS_HAT1Y,
  42                 (buttons & 0x1000 ? -1 : 0) + (buttons & 0x2000 ? 1 : 0));
  43         input_report_abs(dev, ABS_HAT1X,
  44                 (buttons & 0x4000 ? -1 : 0) + (buttons & 0x8000 ? 1 : 0));
  45
  46         input_report_key(dev, BTN_C,      buttons & 0x0001);
  47         input_report_key(dev, BTN_B,      buttons & 0x0002);
  48         input_report_key(dev, BTN_A,      buttons & 0x0004);
  49         input_report_key(dev, BTN_START,  buttons & 0x0008);
  50         input_report_key(dev, BTN_Z,      buttons & 0x0100);
  51         input_report_key(dev, BTN_Y,      buttons & 0x0200);
  52         input_report_key(dev, BTN_X,      buttons & 0x0400);
  53         input_report_key(dev, BTN_SELECT, buttons & 0x0800);
  54
  55         input_report_abs(dev, ABS_GAS,    res[10]);
  56         input_report_abs(dev, ABS_BRAKE,  res[11]);
  57         input_report_abs(dev, ABS_X,      res[12]);
  58         input_report_abs(dev, ABS_Y,      res[13]);
  59         input_report_abs(dev, ABS_RX,     res[14]);
  60         input_report_abs(dev, ABS_RY,     res[15]);
  61 }
  62
  63 static int dc_pad_open(struct input_dev *dev)
  64 {
  65         struct dc_pad *pad = dev_get_platdata(&dev->dev);
  66
  67         maple_getcond_callback(pad->mdev, dc_pad_callback, HZ/20,
  68                 MAPLE_FUNC_CONTROLLER);
  69
  70         return 0;
  71 }
  72
  73 static void dc_pad_close(struct input_dev *dev)
  74 {
  75         struct dc_pad *pad = dev_get_platdata(&dev->dev);
  76
  77         maple_getcond_callback(pad->mdev, dc_pad_callback, 0,
  78                 MAPLE_FUNC_CONTROLLER);
  79 }
  80
  81 /* allow the controller to be used */
  82 static int probe_maple_controller(struct device *dev)
  83 {
  84         static const short btn_bit[32] = {
  85                 BTN_C, BTN_B, BTN_A, BTN_START, -1, -1, -1, -1,
  86                 BTN_Z, BTN_Y, BTN_X, BTN_SELECT, -1, -1, -1, -1,
  87                 -1, -1, -1, -1, -1, -1, -1, -1,
  88                 -1, -1, -1, -1, -1, -1, -1, -1,
  89         };
  90
  91         static const short abs_bit[32] = {
  92                 -1, -1, -1, -1, ABS_HAT0Y, ABS_HAT0Y, ABS_HAT0X, ABS_HAT0X,
  93                 -1, -1, -1, -1, ABS_HAT1Y, ABS_HAT1Y, ABS_HAT1X, ABS_HAT1X,
  94                 ABS_GAS, ABS_BRAKE, ABS_X, ABS_Y, ABS_RX, ABS_RY, -1, -1,
  95                 -1, -1, -1, -1, -1, -1, -1, -1,
  96         };
  97
  98         struct maple_device *mdev = to_maple_dev(dev);
  99         struct maple_driver *mdrv = to_maple_driver(dev->driver);
 100         int i, error;
 101         struct dc_pad *pad;
 102         struct input_dev *idev;
 103         unsigned long data = be32_to_cpu(mdev->devinfo.function_data[0]);
 104
 105         pad = kzalloc(sizeof(struct dc_pad), GFP_KERNEL);
 106         idev = input_allocate_device();
 107         if (!pad || !idev) {
 108                 error = -ENOMEM;
 109                 goto fail;
 110         }
 111
 112         pad->dev = idev;
 113         pad->mdev = mdev;
 114
 115         idev->open = dc_pad_open;
 116         idev->close = dc_pad_close;
 117
 118         for (i = 0; i < 32; i++) {
 119                 if (data & (1 << i)) {
 120                         if (btn_bit[i] >= 0)
 121                                 __set_bit(btn_bit[i], idev->keybit);
 122                         else if (abs_bit[i] >= 0)
 123                                 __set_bit(abs_bit[i], idev->absbit);
 124                 }
 125         }
 126
 127         if (idev->keybit[BIT_WORD(BTN_JOYSTICK)])
 128                 idev->evbit[0] |= BIT_MASK(EV_KEY);
 129
 130         if (idev->absbit[0])
 131                 idev->evbit[0] |= BIT_MASK(EV_ABS);
 132
 133         for (i = ABS_X; i <= ABS_BRAKE; i++)
 134                 input_set_abs_params(idev, i, 0, 255, 0, 0);
 135
 136         for (i = ABS_HAT0X; i <= ABS_HAT3Y; i++)
 137                 input_set_abs_params(idev, i, 1, -1, 0, 0);
 138
 139         idev->dev.platform_data = pad;
 140         idev->dev.parent = &mdev->dev;
 141         idev->name = mdev->product_name;
 142         idev->id.bustype = BUS_HOST;
 143
 144         error = input_register_device(idev);
 145         if (error)
 146                 goto fail;
 147
 148         mdev->driver = mdrv;
 149         maple_set_drvdata(mdev, pad);
 150
 151         return 0;
 152
 153 fail:
 154         input_free_device(idev);
 155         kfree(pad);
 156         maple_set_drvdata(mdev, NULL);
 157         return error;
 158 }
 159
 160 static int remove_maple_controller(struct device *dev)
 161 {
 162         struct maple_device *mdev = to_maple_dev(dev);
 163         struct dc_pad *pad = maple_get_drvdata(mdev);
 164
 165         mdev->callback = NULL;
 166         input_unregister_device(pad->dev);
 167         maple_set_drvdata(mdev, NULL);
 168         kfree(pad);
 169
 170         return 0;
 171 }
 172
 173 static struct maple_driver dc_pad_driver = {
 174         .function =     MAPLE_FUNC_CONTROLLER,
 175         .drv = {
 176                 .name   = "Dreamcast_controller",
 177                 .probe  = probe_maple_controller,
 178                 .remove = remove_maple_controller,
 179         },
 180 };
 181
 182 static int __init dc_pad_init(void)
 183 {
 184         return maple_driver_register(&dc_pad_driver);
 185 }
 186
 187 static void __exit dc_pad_exit(void)
 188 {
 189         maple_driver_unregister(&dc_pad_driver);
 190 }
 191
 192 module_init(dc_pad_init);
 193 module_exit(dc_pad_exit);