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->dev.parent = &serio->dev; 108 109 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 110 input_dev->keycode = nkbd->keycode; 111 input_dev->keycodesize = sizeof(unsigned char); 112 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode); 113 for (i = 0; i < 128; i++) 114 set_bit(nkbd->keycode[i], input_dev->keybit); 115 clear_bit(0, input_dev->keybit); 116 117 serio_set_drvdata(serio, nkbd); 118 119 err = serio_open(serio, drv); 120 if (err) 121 goto fail2; 122 123 err = input_register_device(nkbd->dev); 124 if (err) 125 goto fail3; 126 127 return 0; 128 129 fail3: serio_close(serio); 130 fail2: serio_set_drvdata(serio, NULL); 131 fail1: input_free_device(input_dev); 132 kfree(nkbd); 133 return err; 134 } 135 136 static void nkbd_disconnect(struct serio *serio) 137 { 138 struct nkbd *nkbd = serio_get_drvdata(serio); 139 140 serio_close(serio); 141 serio_set_drvdata(serio, NULL); 142 input_unregister_device(nkbd->dev); 143 kfree(nkbd); 144 } 145 146 static struct serio_device_id nkbd_serio_ids[] = { 147 { 148 .type = SERIO_RS232, 149 .proto = SERIO_NEWTON, 150 .id = SERIO_ANY, 151 .extra = SERIO_ANY, 152 }, 153 { 0 } 154 }; 155 156 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids); 157 158 static struct serio_driver nkbd_drv = { 159 .driver = { 160 .name = "newtonkbd", 161 }, 162 .description = DRIVER_DESC, 163 .id_table = nkbd_serio_ids, 164 .interrupt = nkbd_interrupt, 165 .connect = nkbd_connect, 166 .disconnect = nkbd_disconnect, 167 }; 168 169 module_serio_driver(nkbd_drv); 170