1 /* 2 * Copyright (c) 2000 Justin Cormack 3 */ 4 5 /* 6 * Newton keyboard driver for Linux 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 * Should you need to contact me, the author, you can do so either by 25 * e-mail - mail your message to <j.cormack@doc.ic.ac.uk>, or by paper mail: 26 * Justin Cormack, 68 Dartmouth Park Road, London NW5 1SN, UK. 27 */ 28 29 #include <linux/slab.h> 30 #include <linux/module.h> 31 #include <linux/input.h> 32 #include <linux/init.h> 33 #include <linux/serio.h> 34 35 #define DRIVER_DESC "Newton keyboard driver" 36 37 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>"); 38 MODULE_DESCRIPTION(DRIVER_DESC); 39 MODULE_LICENSE("GPL"); 40 41 #define NKBD_KEY 0x7f 42 #define NKBD_PRESS 0x80 43 44 static unsigned char nkbd_keycode[128] = { 45 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X, 46 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R, 47 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5, 48 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O, 49 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE, 50 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT, 51 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA, 52 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0, 53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 57 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0 58 }; 59 60 struct nkbd { 61 unsigned char keycode[128]; 62 struct input_dev *dev; 63 struct serio *serio; 64 char phys[32]; 65 }; 66 67 static irqreturn_t nkbd_interrupt(struct serio *serio, 68 unsigned char data, unsigned int flags) 69 { 70 struct nkbd *nkbd = serio_get_drvdata(serio); 71 72 /* invalid scan codes are probably the init sequence, so we ignore them */ 73 if (nkbd->keycode[data & NKBD_KEY]) { 74 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS); 75 input_sync(nkbd->dev); 76 } 77 78 else if (data == 0xe7) /* end of init sequence */ 79 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys); 80 return IRQ_HANDLED; 81 82 } 83 84 static int nkbd_connect(struct serio *serio, struct serio_driver *drv) 85 { 86 struct nkbd *nkbd; 87 struct input_dev *input_dev; 88 int err = -ENOMEM; 89 int i; 90 91 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL); 92 input_dev = input_allocate_device(); 93 if (!nkbd || !input_dev) 94 goto fail1; 95 96 nkbd->serio = serio; 97 nkbd->dev = input_dev; 98 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys); 99 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode)); 100 101 input_dev->name = "Newton Keyboard"; 102 input_dev->phys = nkbd->phys; 103 input_dev->id.bustype = BUS_RS232; 104 input_dev->id.vendor = SERIO_NEWTON; 105 input_dev->id.product = 0x0001; 106 input_dev->id.version = 0x0100; 107 input_dev->cdev.dev = &serio->dev; 108 input_dev->private = nkbd; 109 110 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 111 input_dev->keycode = nkbd->keycode; 112 input_dev->keycodesize = sizeof(unsigned char); 113 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode); 114 for (i = 0; i < 128; i++) 115 set_bit(nkbd->keycode[i], input_dev->keybit); 116 clear_bit(0, input_dev->keybit); 117 118 serio_set_drvdata(serio, nkbd); 119 120 err = serio_open(serio, drv); 121 if (err) 122 goto fail2; 123 124 err = input_register_device(nkbd->dev); 125 if (err) 126 goto fail3; 127 128 return 0; 129 130 fail3: serio_close(serio); 131 fail2: serio_set_drvdata(serio, NULL); 132 fail1: input_free_device(input_dev); 133 kfree(nkbd); 134 return err; 135 } 136 137 static void nkbd_disconnect(struct serio *serio) 138 { 139 struct nkbd *nkbd = serio_get_drvdata(serio); 140 141 serio_close(serio); 142 serio_set_drvdata(serio, NULL); 143 input_unregister_device(nkbd->dev); 144 kfree(nkbd); 145 } 146 147 static struct serio_device_id nkbd_serio_ids[] = { 148 { 149 .type = SERIO_RS232, 150 .proto = SERIO_NEWTON, 151 .id = SERIO_ANY, 152 .extra = SERIO_ANY, 153 }, 154 { 0 } 155 }; 156 157 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids); 158 159 static struct serio_driver nkbd_drv = { 160 .driver = { 161 .name = "newtonkbd", 162 }, 163 .description = DRIVER_DESC, 164 .id_table = nkbd_serio_ids, 165 .interrupt = nkbd_interrupt, 166 .connect = nkbd_connect, 167 .disconnect = nkbd_disconnect, 168 }; 169 170 static int __init nkbd_init(void) 171 { 172 return serio_register_driver(&nkbd_drv); 173 } 174 175 static void __exit nkbd_exit(void) 176 { 177 serio_unregister_driver(&nkbd_drv); 178 } 179 180 module_init(nkbd_init); 181 module_exit(nkbd_exit); 182