// SPDX-License-Identifier: GPL-2.0-or-later /* * Stowaway keyboard driver for Linux */ /* * Copyright (c) 2006 Marek Vasut * * Based on Newton keyboard driver for Linux * by Justin Cormack */ /* */ #include <linux/slab.h> #include <linux/module.h> #include <linux/input.h> #include <linux/serio.h> #define DRIVER_DESC "Stowaway keyboard driver" MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); #define SKBD_KEY_MASK 0x7f #define SKBD_RELEASE 0x80 static unsigned char skbd_keycode[128] = { KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7, 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE, KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE, KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0, 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N, KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P, KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON, KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT, KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0 }; struct skbd { unsigned char keycode[128]; struct input_dev *dev; struct serio *serio; char phys[32]; }; static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct skbd *skbd = serio_get_drvdata(serio); struct input_dev *dev = skbd->dev; if (skbd->keycode[data & SKBD_KEY_MASK]) { input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK], !(data & SKBD_RELEASE)); input_sync(dev); } return IRQ_HANDLED; } static int skbd_connect(struct serio *serio, struct serio_driver *drv) { struct skbd *skbd; struct input_dev *input_dev; int err = -ENOMEM; int i; skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL); input_dev = input_allocate_device(); if (!skbd || !input_dev) goto fail1; skbd->serio = serio; skbd->dev = input_dev; snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys); memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode)); input_dev->name = "Stowaway Keyboard"; input_dev->phys = skbd->phys; input_dev->id.bustype = BUS_RS232; input_dev->id.vendor = SERIO_STOWAWAY; input_dev->id.product = 0x0001; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); input_dev->keycode = skbd->keycode; input_dev->keycodesize = sizeof(unsigned char); input_dev->keycodemax = ARRAY_SIZE(skbd_keycode); for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++) set_bit(skbd_keycode[i], input_dev->keybit); clear_bit(0, input_dev->keybit); serio_set_drvdata(serio, skbd); err = serio_open(serio, drv); if (err) goto fail2; err = input_register_device(skbd->dev); if (err) goto fail3; return 0; fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(skbd); return err; } static void skbd_disconnect(struct serio *serio) { struct skbd *skbd = serio_get_drvdata(serio); serio_close(serio); serio_set_drvdata(serio, NULL); input_unregister_device(skbd->dev); kfree(skbd); } static const struct serio_device_id skbd_serio_ids[] = { { .type = SERIO_RS232, .proto = SERIO_STOWAWAY, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, skbd_serio_ids); static struct serio_driver skbd_drv = { .driver = { .name = "stowaway", }, .description = DRIVER_DESC, .id_table = skbd_serio_ids, .interrupt = skbd_interrupt, .connect = skbd_connect, .disconnect = skbd_disconnect, }; module_serio_driver(skbd_drv);