19bc590e5SSimon Glass /* 29bc590e5SSimon Glass * Keyboard input helper functions (too small to be called a layer) 39bc590e5SSimon Glass * 49bc590e5SSimon Glass * Copyright (c) 2011 The Chromium OS Authors. 59bc590e5SSimon Glass * 61a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 79bc590e5SSimon Glass */ 89bc590e5SSimon Glass 99bc590e5SSimon Glass #ifndef _INPUT_H 109bc590e5SSimon Glass #define _INPUT_H 119bc590e5SSimon Glass 129bc590e5SSimon Glass enum { 139bc590e5SSimon Glass INPUT_MAX_MODIFIERS = 4, 149bc590e5SSimon Glass INPUT_BUFFER_LEN = 16, 159bc590e5SSimon Glass }; 169bc590e5SSimon Glass 179bc590e5SSimon Glass enum { 189bc590e5SSimon Glass /* Keyboard LEDs */ 199bc590e5SSimon Glass INPUT_LED_SCROLL = 1 << 0, 209bc590e5SSimon Glass INPUT_LED_CAPS = 1 << 1, 219bc590e5SSimon Glass INPUT_LED_NUM = 1 << 2, 229bc590e5SSimon Glass }; 239bc590e5SSimon Glass 249bc590e5SSimon Glass /* 259bc590e5SSimon Glass * This table translates key codes to ASCII. Most of the entries are ASCII 269bc590e5SSimon Glass * codes, but entries after KEY_FIRST_MOD indicate that this key is a 279bc590e5SSimon Glass * modifier key, like shift, ctrl. KEY_FIRST_MOD + MOD_SHIFT is the shift 289bc590e5SSimon Glass * key, for example. 299bc590e5SSimon Glass */ 309bc590e5SSimon Glass struct input_key_xlate { 319bc590e5SSimon Glass /* keycode of the modifiers which select this table, -1 if none */ 329bc590e5SSimon Glass int left_keycode; 339bc590e5SSimon Glass int right_keycode; 349bc590e5SSimon Glass const uchar *xlate; /* keycode to ASCII table */ 359bc590e5SSimon Glass int num_entries; /* number of entries in this table */ 369bc590e5SSimon Glass }; 379bc590e5SSimon Glass 389bc590e5SSimon Glass struct input_config { 39c9cac4cdSSimon Glass struct udevice *dev; 409bc590e5SSimon Glass uchar fifo[INPUT_BUFFER_LEN]; 419bc590e5SSimon Glass int fifo_in, fifo_out; 429bc590e5SSimon Glass 439bc590e5SSimon Glass /* Which modifiers are active (1 bit for each MOD_... value) */ 449bc590e5SSimon Glass uchar modifiers; 459bc590e5SSimon Glass uchar flags; /* active state keys (FLAGS_...) */ 469bc590e5SSimon Glass uchar leds; /* active LEDS (INPUT_LED_...) */ 479bc590e5SSimon Glass uchar num_tables; /* number of modifier tables */ 489bc590e5SSimon Glass int prev_keycodes[INPUT_BUFFER_LEN]; /* keys held last time */ 499bc590e5SSimon Glass int num_prev_keycodes; /* number of prev keys */ 509bc590e5SSimon Glass struct input_key_xlate table[INPUT_MAX_MODIFIERS]; 519bc590e5SSimon Glass 529bc590e5SSimon Glass /** 539bc590e5SSimon Glass * Function the input helper calls to scan the keyboard 549bc590e5SSimon Glass * 559bc590e5SSimon Glass * @param config Input state 569bc590e5SSimon Glass * @return 0 if no keys read, otherwise number of keys read, or 1 if 579bc590e5SSimon Glass * unknown 589bc590e5SSimon Glass */ 599bc590e5SSimon Glass int (*read_keys)(struct input_config *config); 609bc590e5SSimon Glass unsigned int next_repeat_ms; /* Next time we repeat a key */ 619bc590e5SSimon Glass unsigned int repeat_delay_ms; /* Time before autorepeat starts */ 629bc590e5SSimon Glass unsigned int repeat_rate_ms; /* Autorepeat rate in ms */ 639bc590e5SSimon Glass }; 649bc590e5SSimon Glass 659bc590e5SSimon Glass struct stdio_dev; 669bc590e5SSimon Glass 679bc590e5SSimon Glass /** 689bc590e5SSimon Glass * Convert a list of key codes into ASCII and send them 699bc590e5SSimon Glass * 709bc590e5SSimon Glass * @param config Input state 719bc590e5SSimon Glass * @param keycode List of key codes to examine 729bc590e5SSimon Glass * @param num_keycodes Number of key codes 7344abe47dSHung-Te Lin * @return number of ascii characters sent, or 0 if none, or -1 for an 7444abe47dSHung-Te Lin * internal error 759bc590e5SSimon Glass */ 769bc590e5SSimon Glass int input_send_keycodes(struct input_config *config, int keycode[], int count); 779bc590e5SSimon Glass 789bc590e5SSimon Glass /** 799bc590e5SSimon Glass * Add a new key translation table to the input 809bc590e5SSimon Glass * 819bc590e5SSimon Glass * @param config Input state 829bc590e5SSimon Glass * @param left_keycode Key to hold to get into this table 839bc590e5SSimon Glass * @param right_keycode Another key to hold to get into this table 849bc590e5SSimon Glass * @param xlate Conversion table from key codes to ASCII 859bc590e5SSimon Glass * @param num_entries Number of entries in xlate table 869bc590e5SSimon Glass */ 879bc590e5SSimon Glass int input_add_table(struct input_config *config, int left_keycode, 889bc590e5SSimon Glass int right_keycode, const uchar *xlate, int num_entries); 899bc590e5SSimon Glass 909bc590e5SSimon Glass /** 919bc590e5SSimon Glass * Test if keys are available to be read 929bc590e5SSimon Glass * 939bc590e5SSimon Glass * @param config Input state 949bc590e5SSimon Glass * @return 0 if no keys available, 1 if keys are available 959bc590e5SSimon Glass */ 969bc590e5SSimon Glass int input_tstc(struct input_config *config); 979bc590e5SSimon Glass 989bc590e5SSimon Glass /** 999bc590e5SSimon Glass * Read a key 1009bc590e5SSimon Glass * 1019bc590e5SSimon Glass * TODO: U-Boot wants 0 for no key, but Ctrl-@ is a valid key... 1029bc590e5SSimon Glass * 1039bc590e5SSimon Glass * @param config Input state 1049bc590e5SSimon Glass * @return key, or 0 if no key, or -1 if error 1059bc590e5SSimon Glass */ 1069bc590e5SSimon Glass int input_getc(struct input_config *config); 1079bc590e5SSimon Glass 1089bc590e5SSimon Glass /** 1099bc590e5SSimon Glass * Register a new device with stdio and switch to it if wanted 1109bc590e5SSimon Glass * 1119bc590e5SSimon Glass * @param dev Pointer to device 1129bc590e5SSimon Glass * @return 0 if ok, -1 on error 1139bc590e5SSimon Glass */ 1149bc590e5SSimon Glass int input_stdio_register(struct stdio_dev *dev); 1159bc590e5SSimon Glass 1169bc590e5SSimon Glass /** 1171b1d3e64SSimon Glass * Set up the keyboard autorepeat delays 1181b1d3e64SSimon Glass * 1191b1d3e64SSimon Glass * @param repeat_delay_ms Delay before key auto-repeat starts (in ms) 1201b1d3e64SSimon Glass * @param repeat_rate_ms Delay between successive key repeats (in ms) 1211b1d3e64SSimon Glass */ 1221b1d3e64SSimon Glass void input_set_delays(struct input_config *config, int repeat_delay_ms, 1231b1d3e64SSimon Glass int repeat_rate_ms); 1241b1d3e64SSimon Glass 1251b1d3e64SSimon Glass /** 126*66877b0fSSimon Glass * Set up the key map tables 127*66877b0fSSimon Glass * 128*66877b0fSSimon Glass * This must be called after input_init() or keycode decoding will not work. 129*66877b0fSSimon Glass * 130*66877b0fSSimon Glass * @param config Input state 131*66877b0fSSimon Glass * @return 0 if ok, -1 on error 132*66877b0fSSimon Glass */ 133*66877b0fSSimon Glass int input_add_tables(struct input_config *config); 134*66877b0fSSimon Glass 135*66877b0fSSimon Glass /** 1369bc590e5SSimon Glass * Set up the input handler with basic key maps. 1379bc590e5SSimon Glass * 1389bc590e5SSimon Glass * @param config Input state 1399bc590e5SSimon Glass * @param leds Initial LED value (INPUT_LED_ mask), 0 suggested 1409bc590e5SSimon Glass * @return 0 if ok, -1 on error 1419bc590e5SSimon Glass */ 1421b1d3e64SSimon Glass int input_init(struct input_config *config, int leds); 1439bc590e5SSimon Glass 1449bc590e5SSimon Glass #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 1459bc590e5SSimon Glass extern int overwrite_console(void); 1469bc590e5SSimon Glass #define OVERWRITE_CONSOLE overwrite_console() 1479bc590e5SSimon Glass #else 1489bc590e5SSimon Glass #define OVERWRITE_CONSOLE 0 1499bc590e5SSimon Glass #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */ 1509bc590e5SSimon Glass 1519bc590e5SSimon Glass #endif 152