1 /* 2 * SEGA Dreamcast mouse driver 3 * Based on drivers/usb/usbmouse.c 4 * 5 * Copyright (c) Yaegashi Takeshi, 2001 6 * Copyright (c) Adrian McMenamin, 2008 - 2009 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/slab.h> 11 #include <linux/input.h> 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/timer.h> 15 #include <linux/maple.h> 16 17 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); 18 MODULE_DESCRIPTION("SEGA Dreamcast mouse driver"); 19 MODULE_LICENSE("GPL"); 20 21 struct dc_mouse { 22 struct input_dev *dev; 23 struct maple_device *mdev; 24 }; 25 26 static void dc_mouse_callback(struct mapleq *mq) 27 { 28 int buttons, relx, rely, relz; 29 struct maple_device *mapledev = mq->dev; 30 struct dc_mouse *mse = maple_get_drvdata(mapledev); 31 struct input_dev *dev = mse->dev; 32 unsigned char *res = mq->recvbuf->buf; 33 34 buttons = ~res[8]; 35 relx = *(unsigned short *)(res + 12) - 512; 36 rely = *(unsigned short *)(res + 14) - 512; 37 relz = *(unsigned short *)(res + 16) - 512; 38 39 input_report_key(dev, BTN_LEFT, buttons & 4); 40 input_report_key(dev, BTN_MIDDLE, buttons & 9); 41 input_report_key(dev, BTN_RIGHT, buttons & 2); 42 input_report_rel(dev, REL_X, relx); 43 input_report_rel(dev, REL_Y, rely); 44 input_report_rel(dev, REL_WHEEL, relz); 45 input_sync(dev); 46 } 47 48 static int dc_mouse_open(struct input_dev *dev) 49 { 50 struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev)); 51 52 maple_getcond_callback(mse->mdev, dc_mouse_callback, HZ/50, 53 MAPLE_FUNC_MOUSE); 54 55 return 0; 56 } 57 58 static void dc_mouse_close(struct input_dev *dev) 59 { 60 struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev)); 61 62 maple_getcond_callback(mse->mdev, dc_mouse_callback, 0, 63 MAPLE_FUNC_MOUSE); 64 } 65 66 /* allow the mouse to be used */ 67 static int probe_maple_mouse(struct device *dev) 68 { 69 struct maple_device *mdev = to_maple_dev(dev); 70 struct maple_driver *mdrv = to_maple_driver(dev->driver); 71 int error; 72 struct input_dev *input_dev; 73 struct dc_mouse *mse; 74 75 mse = kzalloc(sizeof(struct dc_mouse), GFP_KERNEL); 76 if (!mse) { 77 error = -ENOMEM; 78 goto fail; 79 } 80 81 input_dev = input_allocate_device(); 82 if (!input_dev) { 83 error = -ENOMEM; 84 goto fail_nomem; 85 } 86 87 mse->dev = input_dev; 88 mse->mdev = mdev; 89 90 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 91 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 92 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 93 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | 94 BIT_MASK(REL_WHEEL); 95 input_dev->open = dc_mouse_open; 96 input_dev->close = dc_mouse_close; 97 input_dev->name = mdev->product_name; 98 input_dev->id.bustype = BUS_HOST; 99 error = input_register_device(input_dev); 100 if (error) 101 goto fail_register; 102 103 mdev->driver = mdrv; 104 maple_set_drvdata(mdev, mse); 105 106 return error; 107 108 fail_register: 109 input_free_device(input_dev); 110 fail_nomem: 111 kfree(mse); 112 fail: 113 return error; 114 } 115 116 static int remove_maple_mouse(struct device *dev) 117 { 118 struct maple_device *mdev = to_maple_dev(dev); 119 struct dc_mouse *mse = maple_get_drvdata(mdev); 120 121 mdev->callback = NULL; 122 input_unregister_device(mse->dev); 123 maple_set_drvdata(mdev, NULL); 124 kfree(mse); 125 126 return 0; 127 } 128 129 static struct maple_driver dc_mouse_driver = { 130 .function = MAPLE_FUNC_MOUSE, 131 .drv = { 132 .name = "Dreamcast_mouse", 133 .probe = probe_maple_mouse, 134 .remove = remove_maple_mouse, 135 }, 136 }; 137 138 static int __init dc_mouse_init(void) 139 { 140 return maple_driver_register(&dc_mouse_driver); 141 } 142 143 static void __exit dc_mouse_exit(void) 144 { 145 maple_driver_unregister(&dc_mouse_driver); 146 } 147 148 module_init(dc_mouse_init); 149 module_exit(dc_mouse_exit); 150