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- /*
- * Keyboard input helper functions (too small to be called a layer)
- *
- * Copyright (c) 2011 The Chromium OS Authors.
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
- #ifndef _INPUT_H
- #define _INPUT_H
- enum {
- INPUT_MAX_MODIFIERS = 4,
- INPUT_BUFFER_LEN = 16,
- };
- enum {
- /* Keyboard LEDs */
- INPUT_LED_SCROLL = 1 << 0,
- INPUT_LED_CAPS = 1 << 1,
- INPUT_LED_NUM = 1 << 2,
- };
- /*
- * This table translates key codes to ASCII. Most of the entries are ASCII
- * codes, but entries after KEY_FIRST_MOD indicate that this key is a
- * modifier key, like shift, ctrl. KEY_FIRST_MOD + MOD_SHIFT is the shift
- * key, for example.
- */
- struct input_key_xlate {
- /* keycode of the modifiers which select this table, -1 if none */
- int left_keycode;
- int right_keycode;
- const uchar *xlate; /* keycode to ASCII table */
- int num_entries; /* number of entries in this table */
- };
- struct input_config {
- uchar fifo[INPUT_BUFFER_LEN];
- int fifo_in, fifo_out;
- /* Which modifiers are active (1 bit for each MOD_... value) */
- uchar modifiers;
- uchar flags; /* active state keys (FLAGS_...) */
- uchar leds; /* active LEDS (INPUT_LED_...) */
- uchar num_tables; /* number of modifier tables */
- int prev_keycodes[INPUT_BUFFER_LEN]; /* keys held last time */
- int num_prev_keycodes; /* number of prev keys */
- struct input_key_xlate table[INPUT_MAX_MODIFIERS];
- /**
- * Function the input helper calls to scan the keyboard
- *
- * @param config Input state
- * @return 0 if no keys read, otherwise number of keys read, or 1 if
- * unknown
- */
- int (*read_keys)(struct input_config *config);
- unsigned int next_repeat_ms; /* Next time we repeat a key */
- unsigned int repeat_delay_ms; /* Time before autorepeat starts */
- unsigned int repeat_rate_ms; /* Autorepeat rate in ms */
- };
- struct stdio_dev;
- /**
- * Convert a list of key codes into ASCII and send them
- *
- * @param config Input state
- * @param keycode List of key codes to examine
- * @param num_keycodes Number of key codes
- * @return number of ascii characters sent, or 0 if none, or -1 for an
- * internal error
- */
- int input_send_keycodes(struct input_config *config, int keycode[], int count);
- /**
- * Add a new key translation table to the input
- *
- * @param config Input state
- * @param left_keycode Key to hold to get into this table
- * @param right_keycode Another key to hold to get into this table
- * @param xlate Conversion table from key codes to ASCII
- * @param num_entries Number of entries in xlate table
- */
- int input_add_table(struct input_config *config, int left_keycode,
- int right_keycode, const uchar *xlate, int num_entries);
- /**
- * Test if keys are available to be read
- *
- * @param config Input state
- * @return 0 if no keys available, 1 if keys are available
- */
- int input_tstc(struct input_config *config);
- /**
- * Read a key
- *
- * TODO: U-Boot wants 0 for no key, but Ctrl-@ is a valid key...
- *
- * @param config Input state
- * @return key, or 0 if no key, or -1 if error
- */
- int input_getc(struct input_config *config);
- /**
- * Register a new device with stdio and switch to it if wanted
- *
- * @param dev Pointer to device
- * @return 0 if ok, -1 on error
- */
- int input_stdio_register(struct stdio_dev *dev);
- /**
- * Set up the keyboard autorepeat delays
- *
- * @param repeat_delay_ms Delay before key auto-repeat starts (in ms)
- * @param repeat_rate_ms Delay between successive key repeats (in ms)
- */
- void input_set_delays(struct input_config *config, int repeat_delay_ms,
- int repeat_rate_ms);
- /**
- * Set up the input handler with basic key maps.
- *
- * @param config Input state
- * @param leds Initial LED value (INPUT_LED_ mask), 0 suggested
- * @return 0 if ok, -1 on error
- */
- int input_init(struct input_config *config, int leds);
- #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
- extern int overwrite_console(void);
- #define OVERWRITE_CONSOLE overwrite_console()
- #else
- #define OVERWRITE_CONSOLE 0
- #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
- #endif
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