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linux-next/drivers/char/keyboard.c
Dmitry Torokhov e912a30184 Input: keyboard - remove warning about raw mode not supported 
This warning made sense when legacy keyboard driver was preferred
driver in X, but now that evdev driver is the default we can remove
the warning.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-04-20 21:21:24 -07:00

1427 lines
34 KiB
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/*
* 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
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, &param) == NOTIFY_STOP || !key_map) {
atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNBOUND_KEYCODE, &param);
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, &param) == 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, &param) == 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, &param);
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;
}
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