diff options
Diffstat (limited to 'drivers/tty/vt/keyboard.c')
| -rw-r--r-- | drivers/tty/vt/keyboard.c | 803 |
1 files changed, 768 insertions, 35 deletions
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index a605549ee28f..86dd1e302bb3 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -41,6 +41,7 @@ #include <linux/reboot.h> #include <linux/notifier.h> #include <linux/jiffies.h> +#include <linux/uaccess.h> #include <asm/irq_regs.h> @@ -55,8 +56,8 @@ extern void ctrl_alt_del(void); /* * 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. + * 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)) @@ -67,8 +68,6 @@ extern void ctrl_alt_del(void); #define KBD_DEFLOCK 0 -void compute_shiftstate(void); - /* * Handler Tables. */ @@ -99,35 +98,29 @@ 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 kbd_struct kbd_table[MAX_NR_CONSOLES]; +static struct kbd_struct *kbd = kbd_table; + +/* maximum values each key_handler can handle */ +static 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 +}; + +static const int NR_TYPES = ARRAY_SIZE(max_vals); + static struct input_handler kbd_handler; static DEFINE_SPINLOCK(kbd_event_lock); static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)]; /* keyboard key bitmap */ @@ -137,6 +130,8 @@ static int npadch = -1; /* -1 or number assembled on pad */ static unsigned int diacr; static char rep; /* flag telling character repeat */ +static int shift_state = 0; + static unsigned char ledstate = 0xff; /* undefined */ static unsigned char ledioctl; @@ -187,7 +182,7 @@ static int getkeycode_helper(struct input_handle *handle, void *data) return d->error == 0; /* stop as soon as we successfully get one */ } -int getkeycode(unsigned int scancode) +static int getkeycode(unsigned int scancode) { struct getset_keycode_data d = { .ke = { @@ -214,7 +209,7 @@ static int setkeycode_helper(struct input_handle *handle, void *data) return d->error == 0; /* stop as soon as we successfully set one */ } -int setkeycode(unsigned int scancode, unsigned int keycode) +static int setkeycode(unsigned int scancode, unsigned int keycode) { struct getset_keycode_data d = { .ke = { @@ -382,9 +377,11 @@ static void to_utf8(struct vc_data *vc, uint c) /* * 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 + * undefined, so that shiftkey release is seen. The caller must hold the + * kbd_event_lock. */ -void compute_shiftstate(void) + +static void do_compute_shiftstate(void) { unsigned int i, j, k, sym, val; @@ -417,6 +414,15 @@ void compute_shiftstate(void) } } +/* We still have to export this method to vt.c */ +void compute_shiftstate(void) +{ + unsigned long flags; + spin_lock_irqsave(&kbd_event_lock, flags); + do_compute_shiftstate(); + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + /* * We have a combining character DIACR here, followed by the character CH. * If the combination occurs in the table, return the corresponding value. @@ -636,7 +642,7 @@ static void fn_SAK(struct vc_data *vc) static void fn_null(struct vc_data *vc) { - compute_shiftstate(); + do_compute_shiftstate(); } /* @@ -989,6 +995,8 @@ unsigned char getledstate(void) void setledstate(struct kbd_struct *kbd, unsigned int led) { + unsigned long flags; + spin_lock_irqsave(&kbd_event_lock, flags); if (!(led & ~7)) { ledioctl = led; kbd->ledmode = LED_SHOW_IOCTL; @@ -996,6 +1004,7 @@ void setledstate(struct kbd_struct *kbd, unsigned int led) kbd->ledmode = LED_SHOW_FLAGS; set_leds(); + spin_unlock_irqrestore(&kbd_event_lock, flags); } static inline unsigned char getleds(void) @@ -1035,6 +1044,75 @@ static int kbd_update_leds_helper(struct input_handle *handle, void *data) return 0; } +/** + * vt_get_leds - helper for braille console + * @console: console to read + * @flag: flag we want to check + * + * Check the status of a keyboard led flag and report it back + */ +int vt_get_leds(int console, int flag) +{ + unsigned long flags; + struct kbd_struct * kbd = kbd_table + console; + int ret; + + spin_lock_irqsave(&kbd_event_lock, flags); + ret = vc_kbd_led(kbd, flag); + spin_unlock_irqrestore(&kbd_event_lock, flags); + + return ret; +} +EXPORT_SYMBOL_GPL(vt_get_leds); + +/** + * vt_set_led_state - set LED state of a console + * @console: console to set + * @leds: LED bits + * + * Set the LEDs on a console. This is a wrapper for the VT layer + * so that we can keep kbd knowledge internal + */ +void vt_set_led_state(int console, int leds) +{ + struct kbd_struct * kbd = kbd_table + console; + setledstate(kbd, leds); +} + +/** + * vt_kbd_con_start - Keyboard side of console start + * @console: console + * + * Handle console start. This is a wrapper for the VT layer + * so that we can keep kbd knowledge internal + */ +void vt_kbd_con_start(int console) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + spin_lock_irqsave(&kbd_event_lock, flags); + clr_vc_kbd_led(kbd, VC_SCROLLOCK); + set_leds(); + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + +/** + * vt_kbd_con_stop - Keyboard side of console stop + * @console: console + * + * Handle console stop. This is a wrapper for the VT layer + * so that we can keep kbd knowledge internal + */ +void vt_kbd_con_stop(int console) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + spin_lock_irqsave(&kbd_event_lock, flags); + set_vc_kbd_led(kbd, VC_SCROLLOCK); + set_leds(); + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + /* * This is the tasklet that updates LED state on all keyboards * attached to the box. The reason we use tasklet is that we @@ -1254,7 +1332,7 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw) if (rc == NOTIFY_STOP || !key_map) { atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNBOUND_KEYCODE, ¶m); - compute_shiftstate(); + do_compute_shiftstate(); kbd->slockstate = 0; return; } @@ -1404,14 +1482,14 @@ static void kbd_start(struct input_handle *handle) 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_KEY) }, + }, { - .flags = INPUT_DEVICE_ID_MATCH_EVBIT, - .evbit = { BIT_MASK(EV_SND) }, - }, + .flags = INPUT_DEVICE_ID_MATCH_EVBIT, + .evbit = { BIT_MASK(EV_SND) }, + }, { }, /* Terminating entry */ }; @@ -1433,7 +1511,7 @@ int __init kbd_init(void) int i; int error; - for (i = 0; i < MAX_NR_CONSOLES; i++) { + 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; @@ -1452,3 +1530,658 @@ int __init kbd_init(void) return 0; } + +/* Ioctl support code */ + +/** + * vt_do_diacrit - diacritical table updates + * @cmd: ioctl request + * @up: pointer to user data for ioctl + * @perm: permissions check computed by caller + * + * Update the diacritical tables atomically and safely. Lock them + * against simultaneous keypresses + */ +int vt_do_diacrit(unsigned int cmd, void __user *up, int perm) +{ + struct kbdiacrs __user *a = up; + unsigned long flags; + int asize; + int ret = 0; + + switch (cmd) { + case KDGKBDIACR: + { + struct kbdiacr *diacr; + int i; + + diacr = kmalloc(MAX_DIACR * sizeof(struct kbdiacr), + GFP_KERNEL); + if (diacr == NULL) + return -ENOMEM; + + /* Lock the diacriticals table, make a copy and then + copy it after we unlock */ + spin_lock_irqsave(&kbd_event_lock, flags); + + asize = accent_table_size; + for (i = 0; i < asize; i++) { + diacr[i].diacr = conv_uni_to_8bit( + accent_table[i].diacr); + diacr[i].base = conv_uni_to_8bit( + accent_table[i].base); + diacr[i].result = conv_uni_to_8bit( + accent_table[i].result); + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + + if (put_user(asize, &a->kb_cnt)) + ret = -EFAULT; + else if (copy_to_user(a->kbdiacr, diacr, + asize * sizeof(struct kbdiacr))) + ret = -EFAULT; + kfree(diacr); + return ret; + } + case KDGKBDIACRUC: + { + struct kbdiacrsuc __user *a = up; + void *buf; + + buf = kmalloc(MAX_DIACR * sizeof(struct kbdiacruc), + GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + /* Lock the diacriticals table, make a copy and then + copy it after we unlock */ + spin_lock_irqsave(&kbd_event_lock, flags); + + asize = accent_table_size; + memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc)); + + spin_unlock_irqrestore(&kbd_event_lock, flags); + + if (put_user(asize, &a->kb_cnt)) + ret = -EFAULT; + else if (copy_to_user(a->kbdiacruc, buf, + asize*sizeof(struct kbdiacruc))) + ret = -EFAULT; + kfree(buf); + return ret; + } + + case KDSKBDIACR: + { + struct kbdiacrs __user *a = up; + struct kbdiacr *diacr = NULL; + unsigned int ct; + int i; + + if (!perm) + return -EPERM; + if (get_user(ct, &a->kb_cnt)) + return -EFAULT; + if (ct >= MAX_DIACR) + return -EINVAL; + + if (ct) { + diacr = kmalloc(sizeof(struct kbdiacr) * ct, + GFP_KERNEL); + if (diacr == NULL) + return -ENOMEM; + + if (copy_from_user(diacr, a->kbdiacr, + sizeof(struct kbdiacr) * ct)) { + kfree(diacr); + return -EFAULT; + } + } + + spin_lock_irqsave(&kbd_event_lock, flags); + accent_table_size = ct; + for (i = 0; i < ct; i++) { + accent_table[i].diacr = + conv_8bit_to_uni(diacr[i].diacr); + accent_table[i].base = + conv_8bit_to_uni(diacr[i].base); + accent_table[i].result = + conv_8bit_to_uni(diacr[i].result); + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + kfree(diacr); + return 0; + } + + case KDSKBDIACRUC: + { + struct kbdiacrsuc __user *a = up; + unsigned int ct; + void *buf = NULL; + + if (!perm) + return -EPERM; + + if (get_user(ct, &a->kb_cnt)) + return -EFAULT; + + if (ct >= MAX_DIACR) + return -EINVAL; + + if (ct) { + buf = kmalloc(ct * sizeof(struct kbdiacruc), + GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + if (copy_from_user(buf, a->kbdiacruc, + ct * sizeof(struct kbdiacruc))) { + kfree(buf); + return -EFAULT; + } + } + spin_lock_irqsave(&kbd_event_lock, flags); + if (ct) + memcpy(accent_table, buf, + ct * sizeof(struct kbdiacruc)); + accent_table_size = ct; + spin_unlock_irqrestore(&kbd_event_lock, flags); + kfree(buf); + return 0; + } + } + return ret; +} + +/** + * vt_do_kdskbmode - set keyboard mode ioctl + * @console: the console to use + * @arg: the requested mode + * + * Update the keyboard mode bits while holding the correct locks. + * Return 0 for success or an error code. + */ +int vt_do_kdskbmode(int console, unsigned int arg) +{ + struct kbd_struct * kbd = kbd_table + console; + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + switch(arg) { + case K_RAW: + kbd->kbdmode = VC_RAW; + break; + case K_MEDIUMRAW: + kbd->kbdmode = VC_MEDIUMRAW; + break; + case K_XLATE: + kbd->kbdmode = VC_XLATE; + do_compute_shiftstate(); + break; + case K_UNICODE: + kbd->kbdmode = VC_UNICODE; + do_compute_shiftstate(); + break; + case K_OFF: + kbd->kbdmode = VC_OFF; + break; + default: + ret = -EINVAL; + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + return ret; +} + +/** + * vt_do_kdskbmeta - set keyboard meta state + * @console: the console to use + * @arg: the requested meta state + * + * Update the keyboard meta bits while holding the correct locks. + * Return 0 for success or an error code. + */ +int vt_do_kdskbmeta(int console, unsigned int arg) +{ + struct kbd_struct * kbd = kbd_table + console; + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + switch(arg) { + case K_METABIT: + clr_vc_kbd_mode(kbd, VC_META); + break; + case K_ESCPREFIX: + set_vc_kbd_mode(kbd, VC_META); + break; + default: + ret = -EINVAL; + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + return ret; +} + +int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, + int perm) +{ + struct kbkeycode tmp; + int kc = 0; + + if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode))) + return -EFAULT; + switch (cmd) { + case KDGETKEYCODE: + kc = getkeycode(tmp.scancode); + if (kc >= 0) + kc = put_user(kc, &user_kbkc->keycode); + break; + case KDSETKEYCODE: + if (!perm) + return -EPERM; + kc = setkeycode(tmp.scancode, tmp.keycode); + break; + } + return kc; +} + +#define i (tmp.kb_index) +#define s (tmp.kb_table) +#define v (tmp.kb_value) + +int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, + int console) +{ + struct kbd_struct * kbd = kbd_table + console; + struct kbentry tmp; + ushort *key_map, *new_map, val, ov; + unsigned long flags; + + if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry))) + return -EFAULT; + + if (!capable(CAP_SYS_TTY_CONFIG)) + perm = 0; + + switch (cmd) { + case KDGKBENT: + /* Ensure another thread doesn't free it under us */ + spin_lock_irqsave(&kbd_event_lock, flags); + key_map = key_maps[s]; + if (key_map) { + val = U(key_map[i]); + if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES) + val = K_HOLE; + } else + val = (i ? K_HOLE : K_NOSUCHMAP); + spin_unlock_irqrestore(&kbd_event_lock, flags); + return put_user(val, &user_kbe->kb_value); + case KDSKBENT: + if (!perm) + return -EPERM; + if (!i && v == K_NOSUCHMAP) { + spin_lock_irqsave(&kbd_event_lock, flags); + /* deallocate map */ + key_map = key_maps[s]; + if (s && key_map) { + key_maps[s] = NULL; + if (key_map[0] == U(K_ALLOCATED)) { + kfree(key_map); + keymap_count--; + } + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + break; + } + + if (KTYP(v) < NR_TYPES) { + if (KVAL(v) > max_vals[KTYP(v)]) + return -EINVAL; + } else + if (kbd->kbdmode != VC_UNICODE) + return -EINVAL; + + /* ++Geert: non-PC keyboards may generate keycode zero */ +#if !defined(__mc68000__) && !defined(__powerpc__) + /* assignment to entry 0 only tests validity of args */ + if (!i) + break; +#endif + + new_map = kmalloc(sizeof(plain_map), GFP_KERNEL); + if (!new_map) + return -ENOMEM; + spin_lock_irqsave(&kbd_event_lock, flags); + key_map = key_maps[s]; + if (key_map == NULL) { + int j; + + if (keymap_count >= MAX_NR_OF_USER_KEYMAPS && + !capable(CAP_SYS_RESOURCE)) { + spin_unlock_irqrestore(&kbd_event_lock, flags); + kfree(new_map); + return -EPERM; + } + key_maps[s] = new_map; + key_map = new_map; + key_map[0] = U(K_ALLOCATED); + for (j = 1; j < NR_KEYS; j++) + key_map[j] = U(K_HOLE); + keymap_count++; + } else + kfree(new_map); + + ov = U(key_map[i]); + if (v == ov) + goto out; + /* + * Attention Key. + */ + if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) { + spin_unlock_irqrestore(&kbd_event_lock, flags); + return -EPERM; + } + key_map[i] = U(v); + if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT)) + do_compute_shiftstate(); +out: + spin_unlock_irqrestore(&kbd_event_lock, flags); + break; + } + return 0; +} +#undef i +#undef s +#undef v + +/* FIXME: This one needs untangling and locking */ +int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) +{ + struct kbsentry *kbs; + char *p; + u_char *q; + u_char __user *up; + int sz; + int delta; + char *first_free, *fj, *fnw; + int i, j, k; + int ret; + + if (!capable(CAP_SYS_TTY_CONFIG)) + perm = 0; + + kbs = kmalloc(sizeof(*kbs), GFP_KERNEL); + if (!kbs) { + ret = -ENOMEM; + goto reterr; + } + + /* we mostly copy too much here (512bytes), but who cares ;) */ + if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) { + ret = -EFAULT; + goto reterr; + } + kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0'; + i = kbs->kb_func; + + switch (cmd) { + case KDGKBSENT: + sz = sizeof(kbs->kb_string) - 1; /* sz should have been + a struct member */ + up = user_kdgkb->kb_string; + p = func_table[i]; + if(p) + for ( ; *p && sz; p++, sz--) + if (put_user(*p, up++)) { + ret = -EFAULT; + goto reterr; + } + if (put_user('\0', up)) { + ret = -EFAULT; + goto reterr; + } + kfree(kbs); + return ((p && *p) ? -EOVERFLOW : 0); + case KDSKBSENT: + if (!perm) { + ret = -EPERM; + goto reterr; + } + + q = func_table[i]; + first_free = funcbufptr + (funcbufsize - funcbufleft); + for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++) + ; + if (j < MAX_NR_FUNC) + fj = func_table[j]; + else + fj = first_free; + + delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string); + if (delta <= funcbufleft) { /* it fits in current buf */ + if (j < MAX_NR_FUNC) { + memmove(fj + delta, fj, first_free - fj); + for (k = j; k < MAX_NR_FUNC; k++) + if (func_table[k]) + func_table[k] += delta; + } + if (!q) + func_table[i] = fj; + funcbufleft -= delta; + } else { /* allocate a larger buffer */ + sz = 256; + while (sz < funcbufsize - funcbufleft + delta) + sz <<= 1; + fnw = kmalloc(sz, GFP_KERNEL); + if(!fnw) { + ret = -ENOMEM; + goto reterr; + } + + if (!q) + func_table[i] = fj; + if (fj > funcbufptr) + memmove(fnw, funcbufptr, fj - funcbufptr); + for (k = 0; k < j; k++) + if (func_table[k]) + func_table[k] = fnw + (func_table[k] - funcbufptr); + + if (first_free > fj) { + memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj); + for (k = j; k < MAX_NR_FUNC; k++) + if (func_table[k]) + func_table[k] = fnw + (func_table[k] - funcbufptr) + delta; + } + if (funcbufptr != func_buf) + kfree(funcbufptr); + funcbufptr = fnw; + funcbufleft = funcbufleft - delta + sz - funcbufsize; + funcbufsize = sz; + } + strcpy(func_table[i], kbs->kb_string); + break; + } + ret = 0; +reterr: + kfree(kbs); + return ret; +} + +int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + unsigned char ucval; + + switch(cmd) { + /* the ioctls below read/set the flags usually shown in the leds */ + /* don't use them - they will go away without warning */ + case KDGKBLED: + spin_lock_irqsave(&kbd_event_lock, flags); + ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4); + spin_unlock_irqrestore(&kbd_event_lock, flags); + return put_user(ucval, (char __user *)arg); + + case KDSKBLED: + if (!perm) + return -EPERM; + if (arg & ~0x77) + return -EINVAL; + spin_lock_irqsave(&kbd_event_lock, flags); + kbd->ledflagstate = (arg & 7); + kbd->default_ledflagstate = ((arg >> 4) & 7); + set_leds(); + spin_unlock_irqrestore(&kbd_event_lock, flags); + break; + + /* the ioctls below only set the lights, not the functions */ + /* for those, see KDGKBLED and KDSKBLED above */ + case KDGETLED: + ucval = getledstate(); + return put_user(ucval, (char __user *)arg); + + case KDSETLED: + if (!perm) + return -EPERM; + setledstate(kbd, arg); + return 0; + } + return -ENOIOCTLCMD; +} + +int vt_do_kdgkbmode(int console) +{ + struct kbd_struct * kbd = kbd_table + console; + /* This is a spot read so needs no locking */ + switch (kbd->kbdmode) { + case VC_RAW: + return K_RAW; + case VC_MEDIUMRAW: + return K_MEDIUMRAW; + case VC_UNICODE: + return K_UNICODE; + case VC_OFF: + return K_OFF; + default: + return K_XLATE; + } +} + +/** + * vt_do_kdgkbmeta - report meta status + * @console: console to report + * + * Report the meta flag status of this console + */ +int vt_do_kdgkbmeta(int console) +{ + struct kbd_struct * kbd = kbd_table + console; + /* Again a spot read so no locking */ + return vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT; +} + +/** + * vt_reset_unicode - reset the unicode status + * @console: console being reset + * + * Restore the unicode console state to its default + */ +void vt_reset_unicode(int console) +{ + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE; + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + +/** + * vt_get_shiftstate - shift bit state + * + * Report the shift bits from the keyboard state. We have to export + * this to support some oddities in the vt layer. + */ +int vt_get_shift_state(void) +{ + /* Don't lock as this is a transient report */ + return shift_state; +} + +/** + * vt_reset_keyboard - reset keyboard state + * @console: console to reset + * + * Reset the keyboard bits for a console as part of a general console + * reset event + */ +void vt_reset_keyboard(int console) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + set_vc_kbd_mode(kbd, VC_REPEAT); + clr_vc_kbd_mode(kbd, VC_CKMODE); + clr_vc_kbd_mode(kbd, VC_APPLIC); + clr_vc_kbd_mode(kbd, VC_CRLF); + kbd->lockstate = 0; + kbd->slockstate = 0; + kbd->ledmode = LED_SHOW_FLAGS; + kbd->ledflagstate = kbd->default_ledflagstate; + /* do not do set_leds here because this causes an endless tasklet loop + when the keyboard hasn't been initialized yet */ + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + +/** + * vt_get_kbd_mode_bit - read keyboard status bits + * @console: console to read from + * @bit: mode bit to read + * + * Report back a vt mode bit. We do this without locking so the + * caller must be sure that there are no synchronization needs + */ + +int vt_get_kbd_mode_bit(int console, int bit) +{ + struct kbd_struct * kbd = kbd_table + console; + return vc_kbd_mode(kbd, bit); +} + +/** + * vt_set_kbd_mode_bit - read keyboard status bits + * @console: console to read from + * @bit: mode bit to read + * + * Set a vt mode bit. We do this without locking so the + * caller must be sure that there are no synchronization needs + */ + +void vt_set_kbd_mode_bit(int console, int bit) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + set_vc_kbd_mode(kbd, bit); + spin_unlock_irqrestore(&kbd_event_lock, flags); +} + +/** + * vt_clr_kbd_mode_bit - read keyboard status bits + * @console: console to read from + * @bit: mode bit to read + * + * Report back a vt mode bit. We do this without locking so the + * caller must be sure that there are no synchronization needs + */ + +void vt_clr_kbd_mode_bit(int console, int bit) +{ + struct kbd_struct * kbd = kbd_table + console; + unsigned long flags; + + spin_lock_irqsave(&kbd_event_lock, flags); + clr_vc_kbd_mode(kbd, bit); + spin_unlock_irqrestore(&kbd_event_lock, flags); +} |