1 /* 2 * Stowaway keyboard driver for Linux 3 */ 4 5 /* 6 * Copyright (c) 2006 Marek Vasut 7 * 8 * Based on Newton keyboard driver for Linux 9 * by Justin Cormack 10 */ 11 12 /* 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 26 * 27 * Should you need to contact me, the author, you can do so either by 28 * e-mail - mail your message to <marek.vasut@gmail.com>, or by paper mail: 29 * Marek Vasut, Liskovecka 559, Frydek-Mistek, 738 01 Czech Republic 30 */ 31 32 #include <linux/slab.h> 33 #include <linux/module.h> 34 #include <linux/input.h> 35 #include <linux/init.h> 36 #include <linux/serio.h> 37 38 #define DRIVER_DESC "Stowaway keyboard driver" 39 40 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); 41 MODULE_DESCRIPTION(DRIVER_DESC); 42 MODULE_LICENSE("GPL"); 43 44 #define SKBD_KEY_MASK 0x7f 45 #define SKBD_RELEASE 0x80 46 47 static unsigned char skbd_keycode[128] = { 48 KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7, 49 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE, 50 KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE, 51 KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 52 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0, 53 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N, 54 KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC, 55 KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P, 56 KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON, 57 KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT, 58 KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 59 KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 60 0, 0, 0, 0, 0, 0, 0, 0, 61 0, 0, 0, 0, 0, 0, 0, 0, 62 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, 63 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0 64 }; 65 66 struct skbd { 67 unsigned char keycode[128]; 68 struct input_dev *dev; 69 struct serio *serio; 70 char phys[32]; 71 }; 72 73 static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data, 74 unsigned int flags) 75 { 76 struct skbd *skbd = serio_get_drvdata(serio); 77 struct input_dev *dev = skbd->dev; 78 79 if (skbd->keycode[data & SKBD_KEY_MASK]) { 80 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK], 81 !(data & SKBD_RELEASE)); 82 input_sync(dev); 83 } 84 85 return IRQ_HANDLED; 86 } 87 88 static int skbd_connect(struct serio *serio, struct serio_driver *drv) 89 { 90 struct skbd *skbd; 91 struct input_dev *input_dev; 92 int err = -ENOMEM; 93 int i; 94 95 skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL); 96 input_dev = input_allocate_device(); 97 if (!skbd || !input_dev) 98 goto fail1; 99 100 skbd->serio = serio; 101 skbd->dev = input_dev; 102 snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys); 103 memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode)); 104 105 input_dev->name = "Stowaway Keyboard"; 106 input_dev->phys = skbd->phys; 107 input_dev->id.bustype = BUS_RS232; 108 input_dev->id.vendor = SERIO_STOWAWAY; 109 input_dev->id.product = 0x0001; 110 input_dev->id.version = 0x0100; 111 input_dev->dev.parent = &serio->dev; 112 113 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 114 input_dev->keycode = skbd->keycode; 115 input_dev->keycodesize = sizeof(unsigned char); 116 input_dev->keycodemax = ARRAY_SIZE(skbd_keycode); 117 for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++) 118 set_bit(skbd_keycode[i], input_dev->keybit); 119 clear_bit(0, input_dev->keybit); 120 121 serio_set_drvdata(serio, skbd); 122 123 err = serio_open(serio, drv); 124 if (err) 125 goto fail2; 126 127 err = input_register_device(skbd->dev); 128 if (err) 129 goto fail3; 130 131 return 0; 132 133 fail3: serio_close(serio); 134 fail2: serio_set_drvdata(serio, NULL); 135 fail1: input_free_device(input_dev); 136 kfree(skbd); 137 return err; 138 } 139 140 static void skbd_disconnect(struct serio *serio) 141 { 142 struct skbd *skbd = serio_get_drvdata(serio); 143 144 serio_close(serio); 145 serio_set_drvdata(serio, NULL); 146 input_unregister_device(skbd->dev); 147 kfree(skbd); 148 } 149 150 static struct serio_device_id skbd_serio_ids[] = { 151 { 152 .type = SERIO_RS232, 153 .proto = SERIO_STOWAWAY, 154 .id = SERIO_ANY, 155 .extra = SERIO_ANY, 156 }, 157 { 0 } 158 }; 159 160 MODULE_DEVICE_TABLE(serio, skbd_serio_ids); 161 162 static struct serio_driver skbd_drv = { 163 .driver = { 164 .name = "stowaway", 165 }, 166 .description = DRIVER_DESC, 167 .id_table = skbd_serio_ids, 168 .interrupt = skbd_interrupt, 169 .connect = skbd_connect, 170 .disconnect = skbd_disconnect, 171 }; 172 173 module_serio_driver(skbd_drv); 174