diff options
Diffstat (limited to 'drivers/char/keyboard.c')
| -rw-r--r-- | drivers/char/keyboard.c | 1428 |
1 files changed, 1428 insertions, 0 deletions
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c new file mode 100644 index 0000000..de26a97 --- /dev/null +++ b/drivers/char/keyboard.c @@ -0,0 +1,1428 @@ +/* + * linux/drivers/char/keyboard.c + * + * Written for linux by Johan Myreen as a translation from + * the assembly version by Linus (with diacriticals added) + * + * Some additional features added by Christoph Niemann (ChN), March 1993 + * + * Loadable keymaps by Risto Kankkunen, May 1993 + * + * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993 + * Added decr/incr_console, dynamic keymaps, Unicode support, + * dynamic function/string keys, led setting, Sept 1994 + * `Sticky' modifier keys, 951006. + * + * 11-11-96: SAK should now work in the raw mode (Martin Mares) + * + * Modified to provide 'generic' keyboard support by Hamish Macdonald + * Merge with the m68k keyboard driver and split-off of the PC low-level + * parts by Geert Uytterhoeven, May 1997 + * + * 27-05-97: Added support for the Magic SysRq Key (Martin Mares) + * 30-07-98: Dead keys redone, aeb@cwi.nl. + * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik) + */ + +#include <linux/consolemap.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/irq.h> + +#include <linux/kbd_kern.h> +#include <linux/kbd_diacr.h> +#include <linux/vt_kern.h> +#include <linux/sysrq.h> +#include <linux/input.h> +#include <linux/reboot.h> +#include <linux/notifier.h> +#include <linux/jiffies.h> + +extern void ctrl_alt_del(void); + +#define to_handle_h(n) container_of(n, struct input_handle, h_node) + +/* + * Exported functions/variables + */ + +#define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META)) + +/* + * Some laptops take the 789uiojklm,. keys as number pad when NumLock is on. + * This seems a good reason to start with NumLock off. On HIL keyboards + * of PARISC machines however there is no NumLock key and everyone expects the keypad + * to be used for numbers. + */ + +#if defined(CONFIG_PARISC) && (defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD)) +#define KBD_DEFLEDS (1 << VC_NUMLOCK) +#else +#define KBD_DEFLEDS 0 +#endif + +#define KBD_DEFLOCK 0 + +void compute_shiftstate(void); + +/* + * Handler Tables. + */ + +#define K_HANDLERS\ + k_self, k_fn, k_spec, k_pad,\ + k_dead, k_cons, k_cur, k_shift,\ + k_meta, k_ascii, k_lock, k_lowercase,\ + k_slock, k_dead2, k_brl, k_ignore + +typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value, + char up_flag); +static k_handler_fn K_HANDLERS; +k_handler_fn *k_handler[16] = { K_HANDLERS }; +EXPORT_SYMBOL_GPL(k_handler); + +#define FN_HANDLERS\ + fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\ + fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\ + fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\ + fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\ + fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num + +typedef void (fn_handler_fn)(struct vc_data *vc); +static fn_handler_fn FN_HANDLERS; +static fn_handler_fn *fn_handler[] = { FN_HANDLERS }; + +/* + * Variables exported for vt_ioctl.c + */ + +/* maximum values each key_handler can handle */ +const int max_vals[] = { + 255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1, + NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1, + 255, NR_LOCK - 1, 255, NR_BRL - 1 +}; + +const int NR_TYPES = ARRAY_SIZE(max_vals); + +struct kbd_struct kbd_table[MAX_NR_CONSOLES]; +EXPORT_SYMBOL_GPL(kbd_table); +static struct kbd_struct *kbd = kbd_table; + +struct vt_spawn_console vt_spawn_con = { + .lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock), + .pid = NULL, + .sig = 0, +}; + +/* + * Variables exported for vt.c + */ + +int shift_state = 0; + +/* + * Internal Data. + */ + +static struct input_handler kbd_handler; +static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)]; /* keyboard key bitmap */ +static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */ +static int dead_key_next; +static int npadch = -1; /* -1 or number assembled on pad */ +static unsigned int diacr; +static char rep; /* flag telling character repeat */ + +static unsigned char ledstate = 0xff; /* undefined */ +static unsigned char ledioctl; + +static struct ledptr { + unsigned int *addr; + unsigned int mask; + unsigned char valid:1; +} ledptrs[3]; + +/* Simple translation table for the SysRq keys */ + +#ifdef CONFIG_MAGIC_SYSRQ +unsigned char kbd_sysrq_xlate[KEY_MAX + 1] = + "\000\0331234567890-=\177\t" /* 0x00 - 0x0f */ + "qwertyuiop[]\r\000as" /* 0x10 - 0x1f */ + "dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */ + "bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */ + "\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */ + "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */ + "\r\000/"; /* 0x60 - 0x6f */ +static int sysrq_down; +static int sysrq_alt_use; +#endif +static int sysrq_alt; + +/* + * Notifier list for console keyboard events + */ +static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list); + +int register_keyboard_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_register(&keyboard_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(register_keyboard_notifier); + +int unregister_keyboard_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(unregister_keyboard_notifier); + +/* + * Translation of scancodes to keycodes. We set them on only the first + * keyboard in the list that accepts the scancode and keycode. + * Explanation for not choosing the first attached keyboard anymore: + * USB keyboards for example have two event devices: one for all "normal" + * keys and one for extra function keys (like "volume up", "make coffee", + * etc.). So this means that scancodes for the extra function keys won't + * be valid for the first event device, but will be for the second. + */ +int getkeycode(unsigned int scancode) +{ + struct input_handle *handle; + int keycode; + int error = -ENODEV; + + list_for_each_entry(handle, &kbd_handler.h_list, h_node) { + error = input_get_keycode(handle->dev, scancode, &keycode); + if (!error) + return keycode; + } + + return error; +} + +int setkeycode(unsigned int scancode, unsigned int keycode) +{ + struct input_handle *handle; + int error = -ENODEV; + + list_for_each_entry(handle, &kbd_handler.h_list, h_node) { + error = input_set_keycode(handle->dev, scancode, keycode); + if (!error) + break; + } + + return error; +} + +/* + * Making beeps and bells. + */ +static void kd_nosound(unsigned long ignored) +{ + struct input_handle *handle; + + list_for_each_entry(handle, &kbd_handler.h_list, h_node) { + if (test_bit(EV_SND, handle->dev->evbit)) { + if (test_bit(SND_TONE, handle->dev->sndbit)) + input_inject_event(handle, EV_SND, SND_TONE, 0); + if (test_bit(SND_BELL, handle->dev->sndbit)) + input_inject_event(handle, EV_SND, SND_BELL, 0); + } + } +} + +static DEFINE_TIMER(kd_mksound_timer, kd_nosound, 0, 0); + +void kd_mksound(unsigned int hz, unsigned int ticks) +{ + struct list_head *node; + + del_timer(&kd_mksound_timer); + + if (hz) { + list_for_each_prev(node, &kbd_handler.h_list) { + struct input_handle *handle = to_handle_h(node); + if (test_bit(EV_SND, handle->dev->evbit)) { + if (test_bit(SND_TONE, handle->dev->sndbit)) { + input_inject_event(handle, EV_SND, SND_TONE, hz); + break; + } + if (test_bit(SND_BELL, handle->dev->sndbit)) { + input_inject_event(handle, EV_SND, SND_BELL, 1); + break; + } + } + } + if (ticks) + mod_timer(&kd_mksound_timer, jiffies + ticks); + } else + kd_nosound(0); +} +EXPORT_SYMBOL(kd_mksound); + +/* + * Setting the keyboard rate. + */ + +int kbd_rate(struct kbd_repeat *rep) +{ + struct list_head *node; + unsigned int d = 0; + unsigned int p = 0; + + list_for_each(node, &kbd_handler.h_list) { + struct input_handle *handle = to_handle_h(node); + struct input_dev *dev = handle->dev; + + if (test_bit(EV_REP, dev->evbit)) { + if (rep->delay > 0) + input_inject_event(handle, EV_REP, REP_DELAY, rep->delay); + if (rep->period > 0) + input_inject_event(handle, EV_REP, REP_PERIOD, rep->period); + d = dev->rep[REP_DELAY]; + p = dev->rep[REP_PERIOD]; + } + } + rep->delay = d; + rep->period = p; + return 0; +} + +/* + * Helper Functions. + */ +static void put_queue(struct vc_data *vc, int ch) +{ + struct tty_struct *tty = vc->vc_tty; + + if (tty) { + tty_insert_flip_char(tty, ch, 0); + con_schedule_flip(tty); + } +} + +static void puts_queue(struct vc_data *vc, char *cp) +{ + struct tty_struct *tty = vc->vc_tty; + + if (!tty) + return; + + while (*cp) { + tty_insert_flip_char(tty, *cp, 0); + cp++; + } + con_schedule_flip(tty); +} + +static void applkey(struct vc_data *vc, int key, char mode) +{ + static char buf[] = { 0x1b, 'O', 0x00, 0x00 }; + + buf[1] = (mode ? 'O' : '['); + buf[2] = key; + puts_queue(vc, buf); +} + +/* + * Many other routines do put_queue, but I think either + * they produce ASCII, or they produce some user-assigned + * string, and in both cases we might assume that it is + * in utf-8 already. + */ +static void to_utf8(struct vc_data *vc, uint c) +{ + if (c < 0x80) + /* 0******* */ + put_queue(vc, c); + else if (c < 0x800) { + /* 110***** 10****** */ + put_queue(vc, 0xc0 | (c >> 6)); + put_queue(vc, 0x80 | (c & 0x3f)); + } else if (c < 0x10000) { + if (c >= 0xD800 && c < 0xE000) + return; + if (c == 0xFFFF) + return; + /* 1110**** 10****** 10****** */ + put_queue(vc, 0xe0 | (c >> 12)); + put_queue(vc, 0x80 | ((c >> 6) & 0x3f)); + put_queue(vc, 0x80 | (c & 0x3f)); + } else if (c < 0x110000) { + /* 11110*** 10****** 10****** 10****** */ + put_queue(vc, 0xf0 | (c >> 18)); + put_queue(vc, 0x80 | ((c >> 12) & 0x3f)); + put_queue(vc, 0x80 | ((c >> 6) & 0x3f)); + put_queue(vc, 0x80 | (c & 0x3f)); + } +} + +/* + * Called after returning from RAW mode or when changing consoles - recompute + * shift_down[] and shift_state from key_down[] maybe called when keymap is + * undefined, so that shiftkey release is seen + */ +void compute_shiftstate(void) +{ + unsigned int i, j, k, sym, val; + + shift_state = 0; + memset(shift_down, 0, sizeof(shift_down)); + + for (i = 0; i < ARRAY_SIZE(key_down); i++) { + + if (!key_down[i]) + continue; + + k = i * BITS_PER_LONG; + + for (j = 0; j < BITS_PER_LONG; j++, k++) { + + if (!test_bit(k, key_down)) + continue; + + sym = U(key_maps[0][k]); + if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK) + continue; + + val = KVAL(sym); + if (val == KVAL(K_CAPSSHIFT)) + val = KVAL(K_SHIFT); + + shift_down[val]++; + shift_state |= (1 << val); + } + } +} + +/* + * We have a combining character DIACR here, followed by the character CH. + * If the combination occurs in the table, return the corresponding value. + * Otherwise, if CH is a space or equals DIACR, return DIACR. + * Otherwise, conclude that DIACR was not combining after all, + * queue it and return CH. + */ +static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch) +{ + unsigned int d = diacr; + unsigned int i; + + diacr = 0; + + if ((d & ~0xff) == BRL_UC_ROW) { + if ((ch & ~0xff) == BRL_UC_ROW) + return d | ch; + } else { + for (i = 0; i < accent_table_size; i++) + if (accent_table[i].diacr == d && accent_table[i].base == ch) + return accent_table[i].result; + } + + if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d) + return d; + + if (kbd->kbdmode == VC_UNICODE) + to_utf8(vc, d); + else { + int c = conv_uni_to_8bit(d); + if (c != -1) + put_queue(vc, c); + } + + return ch; +} + +/* + * Special function handlers + */ +static void fn_enter(struct vc_data *vc) +{ + if (diacr) { + if (kbd->kbdmode == VC_UNICODE) + to_utf8(vc, diacr); + else { + int c = conv_uni_to_8bit(diacr); + if (c != -1) + put_queue(vc, c); + } + diacr = 0; + } + put_queue(vc, 13); + if (vc_kbd_mode(kbd, VC_CRLF)) + put_queue(vc, 10); +} + +static void fn_caps_toggle(struct vc_data *vc) +{ + if (rep) + return; + chg_vc_kbd_led(kbd, VC_CAPSLOCK); +} + +static void fn_caps_on(struct vc_data *vc) +{ + if (rep) + return; + set_vc_kbd_led(kbd, VC_CAPSLOCK); +} + +static void fn_show_ptregs(struct vc_data *vc) +{ + struct pt_regs *regs = get_irq_regs(); + if (regs) + show_regs(regs); +} + +static void fn_hold(struct vc_data *vc) +{ + struct tty_struct *tty = vc->vc_tty; + + if (rep || !tty) + return; + + /* + * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty); + * these routines are also activated by ^S/^Q. + * (And SCROLLOCK can also be set by the ioctl KDSKBLED.) + */ + if (tty->stopped) + start_tty(tty); + else + stop_tty(tty); +} + +static void fn_num(struct vc_data *vc) +{ + if (vc_kbd_mode(kbd,VC_APPLIC)) + applkey(vc, 'P', 1); + else + fn_bare_num(vc); +} + +/* + * Bind this to Shift-NumLock if you work in application keypad mode + * but want to be able to change the NumLock flag. + * Bind this to NumLock if you prefer that the NumLock key always + * changes the NumLock flag. + */ +static void fn_bare_num(struct vc_data *vc) +{ + if (!rep) + chg_vc_kbd_led(kbd, VC_NUMLOCK); +} + +static void fn_lastcons(struct vc_data *vc) +{ + /* switch to the last used console, ChN */ + set_console(last_console); +} + +static void fn_dec_console(struct vc_data *vc) +{ + int i, cur = fg_console; + + /* Currently switching? Queue this next switch relative to that. */ + if (want_console != -1) + cur = want_console; + + for (i = cur - 1; i != cur; i--) { + if (i == -1) + i = MAX_NR_CONSOLES - 1; + if (vc_cons_allocated(i)) + break; + } + set_console(i); +} + +static void fn_inc_console(struct vc_data *vc) +{ + int i, cur = fg_console; + + /* Currently switching? Queue this next switch relative to that. */ + if (want_console != -1) + cur = want_console; + + for (i = cur+1; i != cur; i++) { + if (i == MAX_NR_CONSOLES) + i = 0; + if (vc_cons_allocated(i)) + break; + } + set_console(i); +} + +static void fn_send_intr(struct vc_data *vc) +{ + struct tty_struct *tty = vc->vc_tty; + + if (!tty) + return; + tty_insert_flip_char(tty, 0, TTY_BREAK); + con_schedule_flip(tty); +} + +static void fn_scroll_forw(struct vc_data *vc) +{ + scrollfront(vc, 0); +} + +static void fn_scroll_back(struct vc_data *vc) +{ + scrollback(vc, 0); +} + +static void fn_show_mem(struct vc_data *vc) +{ + show_mem(); +} + +static void fn_show_state(struct vc_data *vc) +{ + show_state(); +} + +static void fn_boot_it(struct vc_data *vc) +{ + ctrl_alt_del(); +} + +static void fn_compose(struct vc_data *vc) +{ + dead_key_next = 1; +} + +static void fn_spawn_con(struct vc_data *vc) +{ + spin_lock(&vt_spawn_con.lock); + if (vt_spawn_con.pid) + if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) { + put_pid(vt_spawn_con.pid); + vt_spawn_con.pid = NULL; + } + spin_unlock(&vt_spawn_con.lock); +} + +static void fn_SAK(struct vc_data *vc) +{ + struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work; + schedule_work(SAK_work); +} + +static void fn_null(struct vc_data *vc) +{ + compute_shiftstate(); +} + +/* + * Special key handlers + */ +static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag) +{ +} + +static void k_spec(struct vc_data *vc, unsigned char value, char up_flag) +{ + if (up_flag) + return; + if (value >= ARRAY_SIZE(fn_handler)) + return; + if ((kbd->kbdmode == VC_RAW || + kbd->kbdmode == VC_MEDIUMRAW) && + value != KVAL(K_SAK)) + return; /* SAK is allowed even in raw mode */ + fn_handler[value](vc); +} + +static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag) +{ + printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n"); +} + +static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag) +{ + if (up_flag) + return; /* no action, if this is a key release */ + + if (diacr) + value = handle_diacr(vc, value); + + if (dead_key_next) { + dead_key_next = 0; + diacr = value; + return; + } + if (kbd->kbdmode == VC_UNICODE) + to_utf8(vc, value); + else { + int c = conv_uni_to_8bit(value); + if (c != -1) + put_queue(vc, c); + } +} + +/* + * Handle dead key. Note that we now may have several + * dead keys modifying the same character. Very useful + * for Vietnamese. + */ +static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag) +{ + if (up_flag) + return; + diacr = (diacr ? handle_diacr(vc, value) : value); +} + +static void k_self(struct vc_data *vc, unsigned char value, char up_flag) +{ + k_unicode(vc, conv_8bit_to_uni(value), up_flag); +} + +static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag) +{ + k_deadunicode(vc, value, up_flag); +} + +/* + * Obsolete - for backwards compatibility only + */ +static void k_dead(struct vc_data *vc, unsigned char value, char up_flag) +{ + static const unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' }; + value = ret_diacr[value]; + k_deadunicode(vc, value, up_flag); +} + +static void k_cons(struct vc_data *vc, unsigned char value, char up_flag) +{ + if (up_flag) + return; + set_console(value); +} + +static void k_fn(struct vc_data *vc, unsigned char value, char up_flag) +{ + unsigned v; + + if (up_flag) + return; + v = value; + if (v < ARRAY_SIZE(func_table)) { + if (func_table[value]) + puts_queue(vc, func_table[value]); + } else + printk(KERN_ERR "k_fn called with value=%d\n", value); +} + +static void k_cur(struct vc_data *vc, unsigned char value, char up_flag) +{ + static const char cur_chars[] = "BDCA"; + + if (up_flag) + return; + applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE)); +} + +static void k_pad(struct vc_data *vc, unsigned char value, char up_flag) +{ + static const char pad_chars[] = "0123456789+-*/\015,.?()#"; + static const char app_map[] = "pqrstuvwxylSRQMnnmPQS"; + + if (up_flag) + return; /* no action, if this is a key release */ + + /* kludge... shift forces cursor/number keys */ + if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) { + applkey(vc, app_map[value], 1); + return; + } + + if (!vc_kbd_led(kbd, VC_NUMLOCK)) + switch (value) { + case KVAL(K_PCOMMA): + case KVAL(K_PDOT): + k_fn(vc, KVAL(K_REMOVE), 0); + return; + case KVAL(K_P0): + k_fn(vc, KVAL(K_INSERT), 0); + return; + case KVAL(K_P1): + k_fn(vc, KVAL(K_SELECT), 0); + return; + case KVAL(K_P2): + k_cur(vc, KVAL(K_DOWN), 0); + return; + case KVAL(K_P3): + k_fn(vc, KVAL(K_PGDN), 0); + return; + case KVAL(K_P4): + k_cur(vc, KVAL(K_LEFT), 0); + return; + case KVAL(K_P6): + k_cur(vc, KVAL(K_RIGHT), 0); + return; + case KVAL(K_P7): + k_fn(vc, KVAL(K_FIND), 0); + return; + case KVAL(K_P8): + k_cur(vc, KVAL(K_UP), 0); + return; + case KVAL(K_P9): + k_fn(vc, KVAL(K_PGUP), 0); + return; + case KVAL(K_P5): + applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC)); + return; + } + + put_queue(vc, pad_chars[value]); + if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF)) + put_queue(vc, 10); +} + +static void k_shift(struct vc_data *vc, unsigned char value, char up_flag) +{ + int old_state = shift_state; + + if (rep) + return; + /* + * Mimic typewriter: + * a CapsShift key acts like Shift but undoes CapsLock + */ + if (value == KVAL(K_CAPSSHIFT)) { + value = KVAL(K_SHIFT); + if (!up_flag) + clr_vc_kbd_led(kbd, VC_CAPSLOCK); + } + + if (up_flag) { + /* + * handle the case that two shift or control + * keys are depressed simultaneously + */ + if (shift_down[value]) + shift_down[value]--; + } else + shift_down[value]++; + + if (shift_down[value]) + shift_state |= (1 << value); + else + shift_state &= ~(1 << value); + + /* kludge */ + if (up_flag && shift_state != old_state && npadch != -1) { + if (kbd->kbdmode == VC_UNICODE) + to_utf8(vc, npadch); + else + put_queue(vc, npadch & 0xff); + npadch = -1; + } +} + +static void k_meta(struct vc_data *vc, unsigned char value, char up_flag) +{ + if (up_flag) + return; + + if (vc_kbd_mode(kbd, VC_META)) { + put_queue(vc, '\033'); + put_queue(vc, value); + } else + put_queue(vc, value | 0x80); +} + +static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag) +{ + int base; + + if (up_flag) + return; + + if (value < 10) { + /* decimal input of code, while Alt depressed */ + base = 10; + } else { + /* hexadecimal input of code, while AltGr depressed */ + value -= 10; + base = 16; + } + + if (npadch == -1) + npadch = value; + else + npadch = npadch * base + value; +} + +static void k_lock(struct vc_data *vc, unsigned char value, char up_flag) +{ + if (up_flag || rep) + return; + chg_vc_kbd_lock(kbd, value); +} + +static void k_slock(struct vc_data *vc, unsigned char value, char up_flag) +{ + k_shift(vc, value, up_flag); + if (up_flag || rep) + return; + chg_vc_kbd_slock(kbd, value); + /* try to make Alt, oops, AltGr and such work */ + if (!key_maps[kbd->lockstate ^ kbd->slockstate]) { + kbd->slockstate = 0; + chg_vc_kbd_slock(kbd, value); + } +} + +/* by default, 300ms interval for combination release */ +static unsigned brl_timeout = 300; +MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)"); +module_param(brl_timeout, uint, 0644); + +static unsigned brl_nbchords = 1; +MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)"); +module_param(brl_nbchords, uint, 0644); + +static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag) +{ + static unsigned long chords; + static unsigned committed; + + if (!brl_nbchords) + k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag); + else { + committed |= pattern; + chords++; + if (chords == brl_nbchords) { + k_unicode(vc, BRL_UC_ROW | committed, up_flag); + chords = 0; + committed = 0; + } + } +} + +static void k_brl(struct vc_data *vc, unsigned char value, char up_flag) +{ + static unsigned pressed,committing; + static unsigned long releasestart; + + if (kbd->kbdmode != VC_UNICODE) { + if (!up_flag) + printk("keyboard mode must be unicode for braille patterns\n"); + return; + } + + if (!value) { + k_unicode(vc, BRL_UC_ROW, up_flag); + return; + } + + if (value > 8) + return; + + if (up_flag) { + if (brl_timeout) { + if (!committing || + time_after(jiffies, + releasestart + msecs_to_jiffies(brl_timeout))) { + committing = pressed; + releasestart = jiffies; + } + pressed &= ~(1 << (value - 1)); + if (!pressed) { + if (committing) { + k_brlcommit(vc, committing, 0); + committing = 0; + } + } + } else { + if (committing) { + k_brlcommit(vc, committing, 0); + committing = 0; + } + pressed &= ~(1 << (value - 1)); + } + } else { + pressed |= 1 << (value - 1); + if (!brl_timeout) + committing = pressed; + } +} + +/* + * The leds display either (i) the status of NumLock, CapsLock, ScrollLock, + * or (ii) whatever pattern of lights people want to show using KDSETLED, + * or (iii) specified bits of specified words in kernel memory. + */ +unsigned char getledstate(void) +{ + return ledstate; +} + +void setledstate(struct kbd_struct *kbd, unsigned int led) +{ + if (!(led & ~7)) { + ledioctl = led; + kbd->ledmode = LED_SHOW_IOCTL; + } else + kbd->ledmode = LED_SHOW_FLAGS; + set_leds(); +} + +static inline unsigned char getleds(void) +{ + struct kbd_struct *kbd = kbd_table + fg_console; + unsigned char leds; + int i; + + if (kbd->ledmode == LED_SHOW_IOCTL) + return ledioctl; + + leds = kbd->ledflagstate; + + if (kbd->ledmode == LED_SHOW_MEM) { + for (i = 0; i < 3; i++) + if (ledptrs[i].valid) { + if (*ledptrs[i].addr & ledptrs[i].mask) + leds |= (1 << i); + else + leds &= ~(1 << i); + } + } + return leds; +} + +/* + * This routine is the bottom half of the keyboard interrupt + * routine, and runs with all interrupts enabled. It does + * console changing, led setting and copy_to_cooked, which can + * take a reasonably long time. + * + * Aside from timing (which isn't really that important for + * keyboard interrupts as they happen often), using the software + * interrupt routines for this thing allows us to easily mask + * this when we don't want any of the above to happen. + * This allows for easy and efficient race-condition prevention + * for kbd_start => input_inject_event(dev, EV_LED, ...) => ... + */ + +static void kbd_bh(unsigned long dummy) +{ + struct list_head *node; + unsigned char leds = getleds(); + + if (leds != ledstate) { + list_for_each(node, &kbd_handler.h_list) { + struct input_handle *handle = to_handle_h(node); + input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01)); + input_inject_event(handle, EV_LED, LED_NUML, !!(leds & 0x02)); + input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & 0x04)); + input_inject_event(handle, EV_SYN, SYN_REPORT, 0); + } + } + + ledstate = leds; +} + +DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0); + +#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\ + defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\ + defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\ + (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC)) ||\ + defined(CONFIG_AVR32) + +#define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\ + ((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001)) + +static const unsigned short x86_keycodes[256] = + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92, + 284,285,309, 0,312, 91,327,328,329,331,333,335,336,337,338,339, + 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349, + 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355, + 103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361, + 291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114, + 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116, + 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307, + 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330, + 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 }; + +#ifdef CONFIG_SPARC +static int sparc_l1_a_state = 0; +extern void sun_do_break(void); +#endif + +static int emulate_raw(struct vc_data *vc, unsigned int keycode, + unsigned char up_flag) +{ + int code; + + switch (keycode) { + case KEY_PAUSE: + put_queue(vc, 0xe1); + put_queue(vc, 0x1d | up_flag); + put_queue(vc, 0x45 | up_flag); + break; + + case KEY_HANGEUL: + if (!up_flag) + put_queue(vc, 0xf2); + break; + + case KEY_HANJA: + if (!up_flag) + put_queue(vc, 0xf1); + break; + + case KEY_SYSRQ: + /* + * Real AT keyboards (that's what we're trying + * to emulate here emit 0xe0 0x2a 0xe0 0x37 when + * pressing PrtSc/SysRq alone, but simply 0x54 + * when pressing Alt+PrtSc/SysRq. + */ + if (sysrq_alt) { + put_queue(vc, 0x54 | up_flag); + } else { + put_queue(vc, 0xe0); + put_queue(vc, 0x2a | up_flag); + put_queue(vc, 0xe0); + put_queue(vc, 0x37 | up_flag); + } + break; + + default: + if (keycode > 255) + return -1; + + code = x86_keycodes[keycode]; + if (!code) + return -1; + + if (code & 0x100) + put_queue(vc, 0xe0); + put_queue(vc, (code & 0x7f) | up_flag); + + break; + } + + return 0; +} + +#else + +#define HW_RAW(dev) 0 + +#warning "Cannot generate rawmode keyboard for your architecture yet." + +static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag) +{ + if (keycode > 127) + return -1; + + put_queue(vc, keycode | up_flag); + return 0; +} +#endif + +static void kbd_rawcode(unsigned char data) +{ + struct vc_data *vc = vc_cons[fg_console].d; + kbd = kbd_table + fg_console; + if (kbd->kbdmode == VC_RAW) + put_queue(vc, data); +} + +static void kbd_keycode(unsigned int keycode, int down, int hw_raw) +{ + struct vc_data *vc = vc_cons[fg_console].d; + unsigned short keysym, *key_map; + unsigned char type, raw_mode; + struct tty_struct *tty; + int shift_final; + struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down }; + + tty = vc->vc_tty; + + if (tty && (!tty->driver_data)) { + /* No driver data? Strange. Okay we fix it then. */ + tty->driver_data = vc; + } + + kbd = kbd_table + fg_console; + + if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT) + sysrq_alt = down ? keycode : 0; +#ifdef CONFIG_SPARC + if (keycode == KEY_STOP) + sparc_l1_a_state = down; +#endif + + rep = (down == 2); + +#ifdef CONFIG_MAC_EMUMOUSEBTN + if (mac_hid_mouse_emulate_buttons(1, keycode, down)) + return; +#endif /* CONFIG_MAC_EMUMOUSEBTN */ + + if ((raw_mode = (kbd->kbdmode == VC_RAW)) && !hw_raw) + if (emulate_raw(vc, keycode, !down << 7)) + if (keycode < BTN_MISC && printk_ratelimit()) + printk(KERN_WARNING "keyboard.c: can't emulate rawmode for keycode %d\n", keycode); + +#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */ + if (keycode == KEY_SYSRQ && (sysrq_down || (down == 1 && sysrq_alt))) { + if (!sysrq_down) { + sysrq_down = down; + sysrq_alt_use = sysrq_alt; + } + return; + } + if (sysrq_down && !down && keycode == sysrq_alt_use) + sysrq_down = 0; + if (sysrq_down && down && !rep) { + handle_sysrq(kbd_sysrq_xlate[keycode], tty); + return; + } +#endif +#ifdef CONFIG_SPARC + if (keycode == KEY_A && sparc_l1_a_state) { + sparc_l1_a_state = 0; + sun_do_break(); + } +#endif + + if (kbd->kbdmode == VC_MEDIUMRAW) { + /* + * This is extended medium raw mode, with keys above 127 + * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing + * the 'up' flag if needed. 0 is reserved, so this shouldn't + * interfere with anything else. The two bytes after 0 will + * always have the up flag set not to interfere with older + * applications. This allows for 16384 different keycodes, + * which should be enough. + */ + if (keycode < 128) { + put_queue(vc, keycode | (!down << 7)); + } else { + put_queue(vc, !down << 7); + put_queue(vc, (keycode >> 7) | 0x80); + put_queue(vc, keycode | 0x80); + } + raw_mode = 1; + } + + if (down) + set_bit(keycode, key_down); + else + clear_bit(keycode, key_down); + + if (rep && + (!vc_kbd_mode(kbd, VC_REPEAT) || + (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) { + /* + * Don't repeat a key if the input buffers are not empty and the + * characters get aren't echoed locally. This makes key repeat + * usable with slow applications and under heavy loads. + */ + return; + } + + param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate; + param.ledstate = kbd->ledflagstate; + key_map = key_maps[shift_final]; + + if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYCODE, ¶m) == NOTIFY_STOP || !key_map) { + atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNBOUND_KEYCODE, ¶m); + compute_shiftstate(); + kbd->slockstate = 0; + return; + } + + if (keycode >= NR_KEYS) + if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8) + keysym = K(KT_BRL, keycode - KEY_BRL_DOT1 + 1); + else + return; + else + keysym = key_map[keycode]; + + type = KTYP(keysym); + + if (type < 0xf0) { + param.value = keysym; + if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNICODE, ¶m) == NOTIFY_STOP) + return; + if (down && !raw_mode) + to_utf8(vc, keysym); + return; + } + + type -= 0xf0; + + if (type == KT_LETTER) { + type = KT_LATIN; + if (vc_kbd_led(kbd, VC_CAPSLOCK)) { + key_map = key_maps[shift_final ^ (1 << KG_SHIFT)]; + if (key_map) + keysym = key_map[keycode]; + } + } + param.value = keysym; + + if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYSYM, ¶m) == NOTIFY_STOP) + return; + + if (raw_mode && type != KT_SPEC && type != KT_SHIFT) + return; + + (*k_handler[type])(vc, keysym & 0xff, !down); + + param.ledstate = kbd->ledflagstate; + atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, ¶m); + + if (type != KT_SLOCK) + kbd->slockstate = 0; +} + +static void kbd_event(struct input_handle *handle, unsigned int event_type, + unsigned int event_code, int value) +{ + if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev)) + kbd_rawcode(value); + if (event_type == EV_KEY) + kbd_keycode(event_code, value, HW_RAW(handle->dev)); + tasklet_schedule(&keyboard_tasklet); + do_poke_blanked_console = 1; + schedule_console_callback(); +} + +/* + * When a keyboard (or other input device) is found, the kbd_connect + * function is called. The function then looks at the device, and if it + * likes it, it can open it and get events from it. In this (kbd_connect) + * function, we should decide which VT to bind that keyboard to initially. + */ +static int kbd_connect(struct input_handler *handler, struct input_dev *dev, + const struct input_device_id *id) +{ + struct input_handle *handle; + int error; + int i; + + for (i = KEY_RESERVED; i < BTN_MISC; i++) + if (test_bit(i, dev->keybit)) + break; + + if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit)) + return -ENODEV; + + handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); + if (!handle) + return -ENOMEM; + + handle->dev = dev; + handle->handler = handler; + handle->name = "kbd"; + + error = input_register_handle(handle); + if (error) + goto err_free_handle; + + error = input_open_device(handle); + if (error) + goto err_unregister_handle; + + return 0; + + err_unregister_handle: + input_unregister_handle(handle); + err_free_handle: + kfree(handle); + return error; +} + +static void kbd_disconnect(struct input_handle *handle) +{ + input_close_device(handle); + input_unregister_handle(handle); + kfree(handle); +} + +/* + * Start keyboard handler on the new keyboard by refreshing LED state to + * match the rest of the system. + */ +static void kbd_start(struct input_handle *handle) +{ + unsigned char leds = ledstate; + + tasklet_disable(&keyboard_tasklet); + if (leds != 0xff) { + input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01)); + input_inject_event(handle, EV_LED, LED_NUML, !!(leds & 0x02)); + input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & 0x04)); + input_inject_event(handle, EV_SYN, SYN_REPORT, 0); + } + tasklet_enable(&keyboard_tasklet); +} + +static const struct input_device_id kbd_ids[] = { + { + .flags = INPUT_DEVICE_ID_MATCH_EVBIT, + .evbit = { BIT_MASK(EV_KEY) }, + }, + + { + .flags = INPUT_DEVICE_ID_MATCH_EVBIT, + .evbit = { BIT_MASK(EV_SND) }, + }, + + { }, /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(input, kbd_ids); + +static struct input_handler kbd_handler = { + .event = kbd_event, + .connect = kbd_connect, + .disconnect = kbd_disconnect, + .start = kbd_start, + .name = "kbd", + .id_table = kbd_ids, +}; + +int __init kbd_init(void) +{ + int i; + int error; + + for (i = 0; i < MAX_NR_CONSOLES; i++) { + kbd_table[i].ledflagstate = KBD_DEFLEDS; + kbd_table[i].default_ledflagstate = KBD_DEFLEDS; + kbd_table[i].ledmode = LED_SHOW_FLAGS; + kbd_table[i].lockstate = KBD_DEFLOCK; + kbd_table[i].slockstate = 0; + kbd_table[i].modeflags = KBD_DEFMODE; + kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE; + } + + error = input_register_handler(&kbd_handler); + if (error) + return error; + + tasklet_enable(&keyboard_tasklet); + tasklet_schedule(&keyboard_tasklet); + + return 0; +} |
