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 25 #include <linux/slab.h> 26 #include <linux/module.h> 27 #include <linux/input.h> 28 #include <linux/serio.h> 29 30 #define DRIVER_DESC "Newton keyboard driver" 31 32 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>"); 33 MODULE_DESCRIPTION(DRIVER_DESC); 34 MODULE_LICENSE("GPL"); 35 36 #define NKBD_KEY 0x7f 37 #define NKBD_PRESS 0x80 38 39 static unsigned char nkbd_keycode[128] = { 40 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X, 41 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R, 42 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5, 43 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O, 44 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE, 45 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT, 46 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA, 47 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0, 48 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 50 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 52 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0 53 }; 54 55 struct nkbd { 56 unsigned char keycode[128]; 57 struct input_dev *dev; 58 struct serio *serio; 59 char phys[32]; 60 }; 61 62 static irqreturn_t nkbd_interrupt(struct serio *serio, 63 unsigned char data, unsigned int flags) 64 { 65 struct nkbd *nkbd = serio_get_drvdata(serio); 66 67 /* invalid scan codes are probably the init sequence, so we ignore them */ 68 if (nkbd->keycode[data & NKBD_KEY]) { 69 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS); 70 input_sync(nkbd->dev); 71 } 72 73 else if (data == 0xe7) /* end of init sequence */ 74 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys); 75 return IRQ_HANDLED; 76 77 } 78 79 static int nkbd_connect(struct serio *serio, struct serio_driver *drv) 80 { 81 struct nkbd *nkbd; 82 struct input_dev *input_dev; 83 int err = -ENOMEM; 84 int i; 85 86 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL); 87 input_dev = input_allocate_device(); 88 if (!nkbd || !input_dev) 89 goto fail1; 90 91 nkbd->serio = serio; 92 nkbd->dev = input_dev; 93 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys); 94 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode)); 95 96 input_dev->name = "Newton Keyboard"; 97 input_dev->phys = nkbd->phys; 98 input_dev->id.bustype = BUS_RS232; 99 input_dev->id.vendor = SERIO_NEWTON; 100 input_dev->id.product = 0x0001; 101 input_dev->id.version = 0x0100; 102 input_dev->dev.parent = &serio->dev; 103 104 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 105 input_dev->keycode = nkbd->keycode; 106 input_dev->keycodesize = sizeof(unsigned char); 107 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode); 108 for (i = 0; i < 128; i++) 109 set_bit(nkbd->keycode[i], input_dev->keybit); 110 clear_bit(0, input_dev->keybit); 111 112 serio_set_drvdata(serio, nkbd); 113 114 err = serio_open(serio, drv); 115 if (err) 116 goto fail2; 117 118 err = input_register_device(nkbd->dev); 119 if (err) 120 goto fail3; 121 122 return 0; 123 124 fail3: serio_close(serio); 125 fail2: serio_set_drvdata(serio, NULL); 126 fail1: input_free_device(input_dev); 127 kfree(nkbd); 128 return err; 129 } 130 131 static void nkbd_disconnect(struct serio *serio) 132 { 133 struct nkbd *nkbd = serio_get_drvdata(serio); 134 135 serio_close(serio); 136 serio_set_drvdata(serio, NULL); 137 input_unregister_device(nkbd->dev); 138 kfree(nkbd); 139 } 140 141 static const struct serio_device_id nkbd_serio_ids[] = { 142 { 143 .type = SERIO_RS232, 144 .proto = SERIO_NEWTON, 145 .id = SERIO_ANY, 146 .extra = SERIO_ANY, 147 }, 148 { 0 } 149 }; 150 151 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids); 152 153 static struct serio_driver nkbd_drv = { 154 .driver = { 155 .name = "newtonkbd", 156 }, 157 .description = DRIVER_DESC, 158 .id_table = nkbd_serio_ids, 159 .interrupt = nkbd_interrupt, 160 .connect = nkbd_connect, 161 .disconnect = nkbd_disconnect, 162 }; 163 164 module_serio_driver(nkbd_drv); 165