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/serio.h> 33 34 #define DRIVER_DESC "Newton keyboard driver" 35 36 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>"); 37 MODULE_DESCRIPTION(DRIVER_DESC); 38 MODULE_LICENSE("GPL"); 39 40 #define NKBD_KEY 0x7f 41 #define NKBD_PRESS 0x80 42 43 static unsigned char nkbd_keycode[128] = { 44 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X, 45 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R, 46 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5, 47 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O, 48 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE, 49 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT, 50 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA, 51 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0, 52 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 56 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0 57 }; 58 59 struct nkbd { 60 unsigned char keycode[128]; 61 struct input_dev *dev; 62 struct serio *serio; 63 char phys[32]; 64 }; 65 66 static irqreturn_t nkbd_interrupt(struct serio *serio, 67 unsigned char data, unsigned int flags) 68 { 69 struct nkbd *nkbd = serio_get_drvdata(serio); 70 71 /* invalid scan codes are probably the init sequence, so we ignore them */ 72 if (nkbd->keycode[data & NKBD_KEY]) { 73 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS); 74 input_sync(nkbd->dev); 75 } 76 77 else if (data == 0xe7) /* end of init sequence */ 78 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys); 79 return IRQ_HANDLED; 80 81 } 82 83 static int nkbd_connect(struct serio *serio, struct serio_driver *drv) 84 { 85 struct nkbd *nkbd; 86 struct input_dev *input_dev; 87 int err = -ENOMEM; 88 int i; 89 90 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL); 91 input_dev = input_allocate_device(); 92 if (!nkbd || !input_dev) 93 goto fail1; 94 95 nkbd->serio = serio; 96 nkbd->dev = input_dev; 97 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys); 98 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode)); 99 100 input_dev->name = "Newton Keyboard"; 101 input_dev->phys = nkbd->phys; 102 input_dev->id.bustype = BUS_RS232; 103 input_dev->id.vendor = SERIO_NEWTON; 104 input_dev->id.product = 0x0001; 105 input_dev->id.version = 0x0100; 106 input_dev->dev.parent = &serio->dev; 107 108 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 109 input_dev->keycode = nkbd->keycode; 110 input_dev->keycodesize = sizeof(unsigned char); 111 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode); 112 for (i = 0; i < 128; i++) 113 set_bit(nkbd->keycode[i], input_dev->keybit); 114 clear_bit(0, input_dev->keybit); 115 116 serio_set_drvdata(serio, nkbd); 117 118 err = serio_open(serio, drv); 119 if (err) 120 goto fail2; 121 122 err = input_register_device(nkbd->dev); 123 if (err) 124 goto fail3; 125 126 return 0; 127 128 fail3: serio_close(serio); 129 fail2: serio_set_drvdata(serio, NULL); 130 fail1: input_free_device(input_dev); 131 kfree(nkbd); 132 return err; 133 } 134 135 static void nkbd_disconnect(struct serio *serio) 136 { 137 struct nkbd *nkbd = serio_get_drvdata(serio); 138 139 serio_close(serio); 140 serio_set_drvdata(serio, NULL); 141 input_unregister_device(nkbd->dev); 142 kfree(nkbd); 143 } 144 145 static struct serio_device_id nkbd_serio_ids[] = { 146 { 147 .type = SERIO_RS232, 148 .proto = SERIO_NEWTON, 149 .id = SERIO_ANY, 150 .extra = SERIO_ANY, 151 }, 152 { 0 } 153 }; 154 155 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids); 156 157 static struct serio_driver nkbd_drv = { 158 .driver = { 159 .name = "newtonkbd", 160 }, 161 .description = DRIVER_DESC, 162 .id_table = nkbd_serio_ids, 163 .interrupt = nkbd_interrupt, 164 .connect = nkbd_connect, 165 .disconnect = nkbd_disconnect, 166 }; 167 168 module_serio_driver(nkbd_drv); 169