^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Kernel Debugger Architecture Dependent Console I/O handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * License.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 1999-2006 Silicon Graphics, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kdb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/keyboard.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* Keyboard Controller Registers on normal PCs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define KBD_STATUS_REG 0x64 /* Status register (R) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define KBD_DATA_REG 0x60 /* Keyboard data register (R/W) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* Status Register Bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int kbd_exists;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int kbd_last_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Check if the keyboard controller has a keypress for us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Some parts (Enter Release, LED change) are still blocking polled here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * but hopefully they are all short.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int kdb_get_kbd_char(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int scancode, scanstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int shift_lock; /* CAPS LOCK state (0-off, 1-on) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int shift_key; /* Shift next keypress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int ctrl_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u_short keychar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (KDB_FLAG(NO_I8042) || KDB_FLAG(NO_VT_CONSOLE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) (inb(KBD_STATUS_REG) == 0xff && inb(KBD_DATA_REG) == 0xff)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) kbd_exists = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) kbd_exists = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if ((inb(KBD_STATUS_REG) & KBD_STAT_OBF) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Fetch the scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) scancode = inb(KBD_DATA_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) scanstatus = inb(KBD_STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * Ignore mouse events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (scanstatus & KBD_STAT_MOUSE_OBF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Ignore release, trigger on make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * (except for shift keys, where we want to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * keep the shift state so long as the key is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * held down).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (((scancode&0x7f) == 0x2a) || ((scancode&0x7f) == 0x36)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * Next key may use shift table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if ((scancode & 0x80) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) shift_key = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) shift_key = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if ((scancode&0x7f) == 0x1d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * Left ctrl key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if ((scancode & 0x80) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ctrl_key = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ctrl_key = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if ((scancode & 0x80) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (scancode == 0x9c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) kbd_last_ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) scancode &= 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Translate scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (scancode == 0x3a) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * Toggle caps lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) shift_lock ^= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #ifdef KDB_BLINK_LED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) kdb_toggleled(0x4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (scancode == 0x0e) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Backspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /* Special Key */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) switch (scancode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case 0xF: /* Tab */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case 0x53: /* Del */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) case 0x47: /* Home */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) case 0x4F: /* End */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) case 0x4B: /* Left */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) case 0x48: /* Up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) case 0x50: /* Down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) case 0x4D: /* Right */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (scancode == 0xe0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * For Japanese 86/106 keyboards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * See comment in drivers/char/pc_keyb.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * - Masahiro Adegawa
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (scancode == 0x73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) scancode = 0x59;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) else if (scancode == 0x7d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) scancode = 0x7c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!shift_lock && !shift_key && !ctrl_key) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) keychar = plain_map[scancode];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) } else if ((shift_lock || shift_key) && key_maps[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) keychar = key_maps[1][scancode];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) } else if (ctrl_key && key_maps[4]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) keychar = key_maps[4][scancode];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) keychar = 0x0020;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) kdb_printf("Unknown state/scancode (%d)\n", scancode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) keychar &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (keychar == '\t')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) keychar = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) switch (KTYP(keychar)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) case KT_LETTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) case KT_LATIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (isprint(keychar))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) break; /* printable characters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) case KT_SPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (keychar == K_ENTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return -1; /* ignore unprintables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (scancode == 0x1c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) kbd_last_ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return 13;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return keychar & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) EXPORT_SYMBOL_GPL(kdb_get_kbd_char);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * Best effort cleanup of ENTER break codes on leaving KDB. Called on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * exiting KDB, when we know we processed an ENTER or KP ENTER scan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) void kdb_kbd_cleanup_state(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int scancode, scanstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * Nothing to clean up, since either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * ENTER was never pressed, or has already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * gotten cleaned up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!kbd_last_ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) kbd_last_ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * Enter key. Need to absorb the break code here, lest it gets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * leaked out if we exit KDB as the result of processing 'g'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * This has several interesting implications:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * + Need to handle KP ENTER, which has break code 0xe0 0x9c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * + Need to handle repeat ENTER and repeat KP ENTER. Repeats
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * only get a break code at the end of the repeated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * sequence. This means we can't propagate the repeated key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * press, and must swallow it away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * + Need to handle possible PS/2 mouse input.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * + Need to handle mashed keys.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) while ((inb(KBD_STATUS_REG) & KBD_STAT_OBF) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) cpu_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * Fetch the scancode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) scancode = inb(KBD_DATA_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) scanstatus = inb(KBD_STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * Skip mouse input.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (scanstatus & KBD_STAT_MOUSE_OBF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * If we see 0xe0, this is either a break code for KP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * ENTER, or a repeat make for KP ENTER. Either way,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * since the second byte is equivalent to an ENTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * skip the 0xe0 and try again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * If we see 0x1c, this must be a repeat ENTER or KP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * ENTER (and we swallowed 0xe0 before). Try again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * We can also see make and break codes for other keys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * mashed before or after pressing ENTER. Thus, if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * see anything other than 0x9c, we have to try again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * Note, if you held some key as ENTER was depressed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * that break code would get leaked out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (scancode != 0x9c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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