diff options
Diffstat (limited to 'drivers/input/keyboard/maple_keyb.c')
| -rw-r--r-- | drivers/input/keyboard/maple_keyb.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/input/keyboard/maple_keyb.c b/drivers/input/keyboard/maple_keyb.c new file mode 100644 index 000000000..d08b565be --- /dev/null +++ b/drivers/input/keyboard/maple_keyb.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SEGA Dreamcast keyboard driver + * Based on drivers/usb/usbkbd.c + * Copyright (c) YAEGASHI Takeshi, 2001 + * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009 + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/timer.h> +#include <linux/maple.h> + +/* Very simple mutex to ensure proper cleanup */ +static DEFINE_MUTEX(maple_keyb_mutex); + +#define NR_SCANCODES 256 + +MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk"); +MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver"); +MODULE_LICENSE("GPL"); + +struct dc_kbd { + struct input_dev *dev; + unsigned short keycode[NR_SCANCODES]; + unsigned char new[8]; + unsigned char old[8]; +}; + +static const unsigned short dc_kbd_keycode[NR_SCANCODES] = { + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, KEY_B, + KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L, + KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, KEY_V, + KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, + KEY_7, KEY_8, KEY_9, KEY_0, KEY_ENTER, KEY_ESC, KEY_BACKSPACE, + KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, + KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON, + KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, KEY_DOT, KEY_SLASH, + KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, + KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, KEY_SYSRQ, + KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, KEY_PAGEUP, + KEY_DELETE, KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN, + KEY_UP, KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS, + KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2, KEY_KP3, KEY_KP4, KEY_KP5, + KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, KEY_102ND, + KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15, + KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, + KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, KEY_STOP, + KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE, + KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN, + KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA, + KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT, + KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT, + KEY_RIGHTMETA, KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG, + KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, + KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP, + KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, KEY_SCREENLOCK, KEY_REFRESH, + KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED +}; + +static void dc_scan_kbd(struct dc_kbd *kbd) +{ + struct input_dev *dev = kbd->dev; + void *ptr; + int code, keycode; + int i; + + for (i = 0; i < 8; i++) { + code = i + 224; + keycode = kbd->keycode[code]; + input_event(dev, EV_MSC, MSC_SCAN, code); + input_report_key(dev, keycode, (kbd->new[0] >> i) & 1); + } + + for (i = 2; i < 8; i++) { + ptr = memchr(kbd->new + 2, kbd->old[i], 6); + code = kbd->old[i]; + if (code > 3 && ptr == NULL) { + keycode = kbd->keycode[code]; + if (keycode) { + input_event(dev, EV_MSC, MSC_SCAN, code); + input_report_key(dev, keycode, 0); + } else + dev_dbg(&dev->dev, + "Unknown key (scancode %#x) released.", + code); + } + ptr = memchr(kbd->old + 2, kbd->new[i], 6); + code = kbd->new[i]; + if (code > 3 && ptr) { + keycode = kbd->keycode[code]; + if (keycode) { + input_event(dev, EV_MSC, MSC_SCAN, code); + input_report_key(dev, keycode, 1); + } else + dev_dbg(&dev->dev, + "Unknown key (scancode %#x) pressed.", + code); + } + } + input_sync(dev); + memcpy(kbd->old, kbd->new, 8); +} + +static void dc_kbd_callback(struct mapleq *mq) +{ + struct maple_device *mapledev = mq->dev; + struct dc_kbd *kbd = maple_get_drvdata(mapledev); + unsigned long *buf = (unsigned long *)(mq->recvbuf->buf); + + /* + * We should always get the lock because the only + * time it may be locked is if the driver is in the cleanup phase. + */ + if (likely(mutex_trylock(&maple_keyb_mutex))) { + + if (buf[1] == mapledev->function) { + memcpy(kbd->new, buf + 2, 8); + dc_scan_kbd(kbd); + } + + mutex_unlock(&maple_keyb_mutex); + } +} + +static int probe_maple_kbd(struct device *dev) +{ + struct maple_device *mdev; + struct maple_driver *mdrv; + int i, error; + struct dc_kbd *kbd; + struct input_dev *idev; + + mdev = to_maple_dev(dev); + mdrv = to_maple_driver(dev->driver); + + kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL); + if (!kbd) { + error = -ENOMEM; + goto fail; + } + + idev = input_allocate_device(); + if (!idev) { + error = -ENOMEM; + goto fail_idev_alloc; + } + + kbd->dev = idev; + memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode)); + + idev->name = mdev->product_name; + idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); + idev->keycode = kbd->keycode; + idev->keycodesize = sizeof(unsigned short); + idev->keycodemax = ARRAY_SIZE(kbd->keycode); + idev->id.bustype = BUS_HOST; + idev->dev.parent = &mdev->dev; + + for (i = 0; i < NR_SCANCODES; i++) + __set_bit(dc_kbd_keycode[i], idev->keybit); + __clear_bit(KEY_RESERVED, idev->keybit); + + input_set_capability(idev, EV_MSC, MSC_SCAN); + + error = input_register_device(idev); + if (error) + goto fail_register; + + /* Maple polling is locked to VBLANK - which may be just 50/s */ + maple_getcond_callback(mdev, dc_kbd_callback, HZ/50, + MAPLE_FUNC_KEYBOARD); + + mdev->driver = mdrv; + + maple_set_drvdata(mdev, kbd); + + return error; + +fail_register: + maple_set_drvdata(mdev, NULL); + input_free_device(idev); +fail_idev_alloc: + kfree(kbd); +fail: + return error; +} + +static int remove_maple_kbd(struct device *dev) +{ + struct maple_device *mdev = to_maple_dev(dev); + struct dc_kbd *kbd = maple_get_drvdata(mdev); + + mutex_lock(&maple_keyb_mutex); + + input_unregister_device(kbd->dev); + kfree(kbd); + + maple_set_drvdata(mdev, NULL); + + mutex_unlock(&maple_keyb_mutex); + return 0; +} + +static struct maple_driver dc_kbd_driver = { + .function = MAPLE_FUNC_KEYBOARD, + .drv = { + .name = "Dreamcast_keyboard", + .probe = probe_maple_kbd, + .remove = remove_maple_kbd, + }, +}; + +static int __init dc_kbd_init(void) +{ + return maple_driver_register(&dc_kbd_driver); +} + +static void __exit dc_kbd_exit(void) +{ + maple_driver_unregister(&dc_kbd_driver); +} + +module_init(dc_kbd_init); +module_exit(dc_kbd_exit); |