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); 194