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 28 #include <linux/slab.h> 29 #include <linux/module.h> 30 #include <linux/input.h> 31 #include <linux/serio.h> 32 33 #define DRIVER_DESC "Stowaway keyboard driver" 34 35 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); 36 MODULE_DESCRIPTION(DRIVER_DESC); 37 MODULE_LICENSE("GPL"); 38 39 #define SKBD_KEY_MASK 0x7f 40 #define SKBD_RELEASE 0x80 41 42 static unsigned char skbd_keycode[128] = { 43 KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7, 44 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE, 45 KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE, 46 KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 47 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0, 48 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N, 49 KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC, 50 KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P, 51 KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON, 52 KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT, 53 KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 54 KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 55 0, 0, 0, 0, 0, 0, 0, 0, 56 0, 0, 0, 0, 0, 0, 0, 0, 57 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, 58 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0 59 }; 60 61 struct skbd { 62 unsigned char keycode[128]; 63 struct input_dev *dev; 64 struct serio *serio; 65 char phys[32]; 66 }; 67 68 static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data, 69 unsigned int flags) 70 { 71 struct skbd *skbd = serio_get_drvdata(serio); 72 struct input_dev *dev = skbd->dev; 73 74 if (skbd->keycode[data & SKBD_KEY_MASK]) { 75 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK], 76 !(data & SKBD_RELEASE)); 77 input_sync(dev); 78 } 79 80 return IRQ_HANDLED; 81 } 82 83 static int skbd_connect(struct serio *serio, struct serio_driver *drv) 84 { 85 struct skbd *skbd; 86 struct input_dev *input_dev; 87 int err = -ENOMEM; 88 int i; 89 90 skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL); 91 input_dev = input_allocate_device(); 92 if (!skbd || !input_dev) 93 goto fail1; 94 95 skbd->serio = serio; 96 skbd->dev = input_dev; 97 snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys); 98 memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode)); 99 100 input_dev->name = "Stowaway Keyboard"; 101 input_dev->phys = skbd->phys; 102 input_dev->id.bustype = BUS_RS232; 103 input_dev->id.vendor = SERIO_STOWAWAY; 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 = skbd->keycode; 110 input_dev->keycodesize = sizeof(unsigned char); 111 input_dev->keycodemax = ARRAY_SIZE(skbd_keycode); 112 for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++) 113 set_bit(skbd_keycode[i], input_dev->keybit); 114 clear_bit(0, input_dev->keybit); 115 116 serio_set_drvdata(serio, skbd); 117 118 err = serio_open(serio, drv); 119 if (err) 120 goto fail2; 121 122 err = input_register_device(skbd->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(skbd); 132 return err; 133 } 134 135 static void skbd_disconnect(struct serio *serio) 136 { 137 struct skbd *skbd = serio_get_drvdata(serio); 138 139 serio_close(serio); 140 serio_set_drvdata(serio, NULL); 141 input_unregister_device(skbd->dev); 142 kfree(skbd); 143 } 144 145 static const struct serio_device_id skbd_serio_ids[] = { 146 { 147 .type = SERIO_RS232, 148 .proto = SERIO_STOWAWAY, 149 .id = SERIO_ANY, 150 .extra = SERIO_ANY, 151 }, 152 { 0 } 153 }; 154 155 MODULE_DEVICE_TABLE(serio, skbd_serio_ids); 156 157 static struct serio_driver skbd_drv = { 158 .driver = { 159 .name = "stowaway", 160 }, 161 .description = DRIVER_DESC, 162 .id_table = skbd_serio_ids, 163 .interrupt = skbd_interrupt, 164 .connect = skbd_connect, 165 .disconnect = skbd_disconnect, 166 }; 167 168 module_serio_driver(skbd_drv); 169