1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 1999-2001 Vojtech Pavlik 4 * 5 * Based on the work of: 6 * Teemu Rantanen Derrick Cole 7 * Peter Cervasio Christoph Niemann 8 * Philip Blundell Russell King 9 * Bob Harris 10 */ 11 12 /* 13 * Inport (ATI XL and Microsoft) busmouse driver for Linux 14 */ 15 16 /* 17 */ 18 19 #include <linux/module.h> 20 #include <linux/ioport.h> 21 #include <linux/init.h> 22 #include <linux/interrupt.h> 23 #include <linux/input.h> 24 25 #include <asm/io.h> 26 #include <asm/irq.h> 27 28 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 29 MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver"); 30 MODULE_LICENSE("GPL"); 31 32 #define INPORT_BASE 0x23c 33 #define INPORT_EXTENT 4 34 35 #define INPORT_CONTROL_PORT INPORT_BASE + 0 36 #define INPORT_DATA_PORT INPORT_BASE + 1 37 #define INPORT_SIGNATURE_PORT INPORT_BASE + 2 38 39 #define INPORT_REG_BTNS 0x00 40 #define INPORT_REG_X 0x01 41 #define INPORT_REG_Y 0x02 42 #define INPORT_REG_MODE 0x07 43 #define INPORT_RESET 0x80 44 45 #ifdef CONFIG_MOUSE_ATIXL 46 #define INPORT_NAME "ATI XL Mouse" 47 #define INPORT_VENDOR 0x0002 48 #define INPORT_SPEED_30HZ 0x01 49 #define INPORT_SPEED_50HZ 0x02 50 #define INPORT_SPEED_100HZ 0x03 51 #define INPORT_SPEED_200HZ 0x04 52 #define INPORT_MODE_BASE INPORT_SPEED_100HZ 53 #define INPORT_MODE_IRQ 0x08 54 #else 55 #define INPORT_NAME "Microsoft InPort Mouse" 56 #define INPORT_VENDOR 0x0001 57 #define INPORT_MODE_BASE 0x10 58 #define INPORT_MODE_IRQ 0x01 59 #endif 60 #define INPORT_MODE_HOLD 0x20 61 62 #define INPORT_IRQ 5 63 64 static int inport_irq = INPORT_IRQ; 65 module_param_hw_named(irq, inport_irq, uint, irq, 0); 66 MODULE_PARM_DESC(irq, "IRQ number (5=default)"); 67 68 static struct input_dev *inport_dev; 69 70 static irqreturn_t inport_interrupt(int irq, void *dev_id) 71 { 72 unsigned char buttons; 73 74 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); 75 outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); 76 77 outb(INPORT_REG_X, INPORT_CONTROL_PORT); 78 input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT)); 79 80 outb(INPORT_REG_Y, INPORT_CONTROL_PORT); 81 input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT)); 82 83 outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT); 84 buttons = inb(INPORT_DATA_PORT); 85 86 input_report_key(inport_dev, BTN_MIDDLE, buttons & 1); 87 input_report_key(inport_dev, BTN_LEFT, buttons & 2); 88 input_report_key(inport_dev, BTN_RIGHT, buttons & 4); 89 90 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); 91 outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); 92 93 input_sync(inport_dev); 94 return IRQ_HANDLED; 95 } 96 97 static int inport_open(struct input_dev *dev) 98 { 99 if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL)) 100 return -EBUSY; 101 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); 102 outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT); 103 104 return 0; 105 } 106 107 static void inport_close(struct input_dev *dev) 108 { 109 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); 110 outb(INPORT_MODE_BASE, INPORT_DATA_PORT); 111 free_irq(inport_irq, NULL); 112 } 113 114 static int __init inport_init(void) 115 { 116 unsigned char a, b, c; 117 int err; 118 119 if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) { 120 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE); 121 return -EBUSY; 122 } 123 124 a = inb(INPORT_SIGNATURE_PORT); 125 b = inb(INPORT_SIGNATURE_PORT); 126 c = inb(INPORT_SIGNATURE_PORT); 127 if (a == b || a != c) { 128 printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE); 129 err = -ENODEV; 130 goto err_release_region; 131 } 132 133 inport_dev = input_allocate_device(); 134 if (!inport_dev) { 135 printk(KERN_ERR "inport.c: Not enough memory for input device\n"); 136 err = -ENOMEM; 137 goto err_release_region; 138 } 139 140 inport_dev->name = INPORT_NAME; 141 inport_dev->phys = "isa023c/input0"; 142 inport_dev->id.bustype = BUS_ISA; 143 inport_dev->id.vendor = INPORT_VENDOR; 144 inport_dev->id.product = 0x0001; 145 inport_dev->id.version = 0x0100; 146 147 inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 148 inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 149 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 150 inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 151 152 inport_dev->open = inport_open; 153 inport_dev->close = inport_close; 154 155 outb(INPORT_RESET, INPORT_CONTROL_PORT); 156 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT); 157 outb(INPORT_MODE_BASE, INPORT_DATA_PORT); 158 159 err = input_register_device(inport_dev); 160 if (err) 161 goto err_free_dev; 162 163 return 0; 164 165 err_free_dev: 166 input_free_device(inport_dev); 167 err_release_region: 168 release_region(INPORT_BASE, INPORT_EXTENT); 169 170 return err; 171 } 172 173 static void __exit inport_exit(void) 174 { 175 input_unregister_device(inport_dev); 176 release_region(INPORT_BASE, INPORT_EXTENT); 177 } 178 179 module_init(inport_init); 180 module_exit(inport_exit); 181