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path: root/drivers/char/keyboard.c
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-rw-r--r--drivers/char/keyboard.c1254
1 files changed, 1254 insertions, 0 deletions
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
new file mode 100644
index 000000000000..3ce51c6a1b18
--- /dev/null
+++ b/drivers/char/keyboard.c
@@ -0,0 +1,1254 @@
+/*
+ * 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/config.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/kbd_kern.h>
+#include <linux/kbd_diacr.h>
+#include <linux/vt_kern.h>
+#include <linux/sysrq.h>
+#include <linux/input.h>
+
+static void kbd_disconnect(struct input_handle *handle);
+extern void ctrl_alt_del(void);
+
+/*
+ * 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_ignore, k_ignore
+
+typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
+ char up_flag, struct pt_regs *regs);
+static k_handler_fn K_HANDLERS;
+static k_handler_fn *k_handler[16] = { K_HANDLERS };
+
+#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, struct pt_regs *regs);
+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
+};
+
+const int NR_TYPES = ARRAY_SIZE(max_vals);
+
+struct kbd_struct kbd_table[MAX_NR_CONSOLES];
+static struct kbd_struct *kbd = kbd_table;
+static struct kbd_struct kbd0;
+
+int spawnpid, spawnsig;
+
+/*
+ * Variables exported for vt.c
+ */
+
+int shift_state = 0;
+
+/*
+ * Internal Data.
+ */
+
+static struct input_handler kbd_handler;
+static unsigned long key_down[NBITS(KEY_MAX)]; /* 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 char 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;
+#endif
+static int sysrq_alt;
+
+/*
+ * Translation of scancodes to keycodes. We set them on only the first attached
+ * keyboard - for per-keyboard setting, /dev/input/event is more useful.
+ */
+int getkeycode(unsigned int scancode)
+{
+ struct list_head * node;
+ struct input_dev *dev = NULL;
+
+ list_for_each(node,&kbd_handler.h_list) {
+ struct input_handle * handle = to_handle_h(node);
+ if (handle->dev->keycodesize) {
+ dev = handle->dev;
+ break;
+ }
+ }
+
+ if (!dev)
+ return -ENODEV;
+
+ if (scancode >= dev->keycodemax)
+ return -EINVAL;
+
+ return INPUT_KEYCODE(dev, scancode);
+}
+
+int setkeycode(unsigned int scancode, unsigned int keycode)
+{
+ struct list_head * node;
+ struct input_dev *dev = NULL;
+ unsigned int i, oldkey;
+
+ list_for_each(node,&kbd_handler.h_list) {
+ struct input_handle *handle = to_handle_h(node);
+ if (handle->dev->keycodesize) {
+ dev = handle->dev;
+ break;
+ }
+ }
+
+ if (!dev)
+ return -ENODEV;
+
+ if (scancode >= dev->keycodemax)
+ return -EINVAL;
+ if (keycode > KEY_MAX)
+ return -EINVAL;
+ if (keycode < 0 || keycode > KEY_MAX)
+ return -EINVAL;
+
+ oldkey = SET_INPUT_KEYCODE(dev, scancode, keycode);
+
+ clear_bit(oldkey, dev->keybit);
+ set_bit(keycode, dev->keybit);
+
+ for (i = 0; i < dev->keycodemax; i++)
+ if (INPUT_KEYCODE(dev,i) == oldkey)
+ set_bit(oldkey, dev->keybit);
+
+ return 0;
+}
+
+/*
+ * Making beeps and bells.
+ */
+static void kd_nosound(unsigned long ignored)
+{
+ struct list_head * node;
+
+ list_for_each(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_event(handle->dev, EV_SND, SND_TONE, 0);
+ if (test_bit(SND_BELL, handle->dev->sndbit))
+ input_event(handle->dev, EV_SND, SND_BELL, 0);
+ }
+ }
+}
+
+static struct timer_list kd_mksound_timer =
+ TIMER_INITIALIZER(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_event(handle->dev, EV_SND, SND_TONE, hz);
+ break;
+ }
+ if (test_bit(SND_BELL, handle->dev->sndbit)) {
+ input_event(handle->dev, EV_SND, SND_BELL, 1);
+ break;
+ }
+ }
+ }
+ if (ticks)
+ mod_timer(&kd_mksound_timer, jiffies + ticks);
+ } else
+ kd_nosound(0);
+}
+
+/*
+ * 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_event(dev, EV_REP, REP_DELAY, rep->delay);
+ if (rep->period > 0)
+ input_event(dev, 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. UTF-8 is defined for words of up to 31 bits,
+ * but we need only 16 bits here
+ */
+static void to_utf8(struct vc_data *vc, ushort 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 {
+ /* 1110**** 10****** 10****** */
+ put_queue(vc, 0xe0 | (c >> 12));
+ 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 char handle_diacr(struct vc_data *vc, unsigned char ch)
+{
+ int d = diacr;
+ unsigned int i;
+
+ diacr = 0;
+
+ 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 == d)
+ return d;
+
+ put_queue(vc, d);
+ return ch;
+}
+
+/*
+ * Special function handlers
+ */
+static void fn_enter(struct vc_data *vc, struct pt_regs *regs)
+{
+ if (diacr) {
+ put_queue(vc, diacr);
+ 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, struct pt_regs *regs)
+{
+ if (rep)
+ return;
+ chg_vc_kbd_led(kbd, VC_CAPSLOCK);
+}
+
+static void fn_caps_on(struct vc_data *vc, struct pt_regs *regs)
+{
+ if (rep)
+ return;
+ set_vc_kbd_led(kbd, VC_CAPSLOCK);
+}
+
+static void fn_show_ptregs(struct vc_data *vc, struct pt_regs *regs)
+{
+ if (regs)
+ show_regs(regs);
+}
+
+static void fn_hold(struct vc_data *vc, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ if (vc_kbd_mode(kbd,VC_APPLIC))
+ applkey(vc, 'P', 1);
+ else
+ fn_bare_num(vc, regs);
+}
+
+/*
+ * 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, struct pt_regs *regs)
+{
+ if (!rep)
+ chg_vc_kbd_led(kbd, VC_NUMLOCK);
+}
+
+static void fn_lastcons(struct vc_data *vc, struct pt_regs *regs)
+{
+ /* switch to the last used console, ChN */
+ set_console(last_console);
+}
+
+static void fn_dec_console(struct vc_data *vc, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ 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 pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ scrollfront(vc, 0);
+}
+
+static void fn_scroll_back(struct vc_data *vc, struct pt_regs *regs)
+{
+ scrollback(vc, 0);
+}
+
+static void fn_show_mem(struct vc_data *vc, struct pt_regs *regs)
+{
+ show_mem();
+}
+
+static void fn_show_state(struct vc_data *vc, struct pt_regs *regs)
+{
+ show_state();
+}
+
+static void fn_boot_it(struct vc_data *vc, struct pt_regs *regs)
+{
+ ctrl_alt_del();
+}
+
+static void fn_compose(struct vc_data *vc, struct pt_regs *regs)
+{
+ dead_key_next = 1;
+}
+
+static void fn_spawn_con(struct vc_data *vc, struct pt_regs *regs)
+{
+ if (spawnpid)
+ if(kill_proc(spawnpid, spawnsig, 1))
+ spawnpid = 0;
+}
+
+static void fn_SAK(struct vc_data *vc, struct pt_regs *regs)
+{
+ struct tty_struct *tty = vc->vc_tty;
+
+ /*
+ * SAK should also work in all raw modes and reset
+ * them properly.
+ */
+ if (tty)
+ do_SAK(tty);
+ reset_vc(vc);
+}
+
+static void fn_null(struct vc_data *vc, struct pt_regs *regs)
+{
+ compute_shiftstate();
+}
+
+/*
+ * Special key handlers
+ */
+static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+}
+
+static void k_spec(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ 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, regs);
+}
+
+static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n");
+}
+
+static void k_self(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ 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;
+ }
+ put_queue(vc, value);
+}
+
+/*
+ * Handle dead key. Note that we now may have several
+ * dead keys modifying the same character. Very useful
+ * for Vietnamese.
+ */
+static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ if (up_flag)
+ return;
+ diacr = (diacr ? handle_diacr(vc, value) : value);
+}
+
+/*
+ * Obsolete - for backwards compatibility only
+ */
+static void k_dead(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ static unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' };
+ value = ret_diacr[value];
+ k_dead2(vc, value, up_flag, regs);
+}
+
+static void k_cons(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ if (up_flag)
+ return;
+ set_console(value);
+}
+
+static void k_fn(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ 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, regs);
+ return;
+ case KVAL(K_P0):
+ k_fn(vc, KVAL(K_INSERT), 0, regs);
+ return;
+ case KVAL(K_P1):
+ k_fn(vc, KVAL(K_SELECT), 0, regs);
+ return;
+ case KVAL(K_P2):
+ k_cur(vc, KVAL(K_DOWN), 0, regs);
+ return;
+ case KVAL(K_P3):
+ k_fn(vc, KVAL(K_PGDN), 0, regs);
+ return;
+ case KVAL(K_P4):
+ k_cur(vc, KVAL(K_LEFT), 0, regs);
+ return;
+ case KVAL(K_P6):
+ k_cur(vc, KVAL(K_RIGHT), 0, regs);
+ return;
+ case KVAL(K_P7):
+ k_fn(vc, KVAL(K_FIND), 0, regs);
+ return;
+ case KVAL(K_P8):
+ k_cur(vc, KVAL(K_UP), 0, regs);
+ return;
+ case KVAL(K_P9):
+ k_fn(vc, KVAL(K_PGUP), 0, regs);
+ 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, struct pt_regs *regs)
+{
+ 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 & 0xffff);
+ else
+ put_queue(vc, npadch & 0xff);
+ npadch = -1;
+ }
+}
+
+static void k_meta(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ 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, struct pt_regs *regs)
+{
+ k_shift(vc, value, up_flag, regs);
+ 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);
+ }
+}
+
+/*
+ * 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_refresh_leds => input_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_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01));
+ input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02));
+ input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04));
+ input_sync(handle->dev);
+ }
+ }
+
+ ledstate = leds;
+}
+
+DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
+
+/*
+ * This allows a newly plugged keyboard to pick the LED state.
+ */
+static void kbd_refresh_leds(struct input_handle *handle)
+{
+ unsigned char leds = ledstate;
+
+ tasklet_disable(&keyboard_tasklet);
+ if (leds != 0xff) {
+ input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01));
+ input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02));
+ input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04));
+ input_sync(handle->dev);
+ }
+ tasklet_enable(&keyboard_tasklet);
+}
+
+#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
+ defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC32) ||\
+ defined(CONFIG_SPARC64) || defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
+ (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
+
+#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 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,
+ 284,285,309,298,312, 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,
+ 103,104,105,275,287,279,306,106,274,107,294,364,358,363,362,361,
+ 291,108,381,281,290,272,292,305,280, 99,112,257,258,359,113,114,
+ 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_MAC_EMUMOUSEBTN
+extern int mac_hid_mouse_emulate_buttons(int, int, int);
+#endif /* CONFIG_MAC_EMUMOUSEBTN */
+
+#if defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
+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)
+{
+ if (keycode > 255 || !x86_keycodes[keycode])
+ return -1;
+
+ switch (keycode) {
+ case KEY_PAUSE:
+ put_queue(vc, 0xe1);
+ put_queue(vc, 0x1d | up_flag);
+ put_queue(vc, 0x45 | up_flag);
+ return 0;
+ case KEY_HANGUEL:
+ if (!up_flag) put_queue(vc, 0xf1);
+ return 0;
+ case KEY_HANJA:
+ if (!up_flag) put_queue(vc, 0xf2);
+ return 0;
+ }
+
+ if (keycode == KEY_SYSRQ && sysrq_alt) {
+ put_queue(vc, 0x54 | up_flag);
+ return 0;
+ }
+
+ if (x86_keycodes[keycode] & 0x100)
+ put_queue(vc, 0xe0);
+
+ put_queue(vc, (x86_keycodes[keycode] & 0x7f) | up_flag);
+
+ if (keycode == KEY_SYSRQ) {
+ put_queue(vc, 0xe0);
+ put_queue(vc, 0x37 | up_flag);
+ }
+
+ 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);
+}
+
+void kbd_keycode(unsigned int keycode, int down, int hw_raw, struct pt_regs *regs)
+{
+ 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;
+
+ 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;
+#if defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
+ 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(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))) {
+ sysrq_down = down;
+ return;
+ }
+ if (sysrq_down && down && !rep) {
+ handle_sysrq(kbd_sysrq_xlate[keycode], regs, tty);
+ return;
+ }
+#endif
+#if defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
+ 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->driver->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;
+ }
+
+ shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
+ key_map = key_maps[shift_final];
+
+ if (!key_map) {
+ compute_shiftstate();
+ kbd->slockstate = 0;
+ return;
+ }
+
+ if (keycode > NR_KEYS)
+ return;
+
+ keysym = key_map[keycode];
+ type = KTYP(keysym);
+
+ if (type < 0xf0) {
+ if (down && !raw_mode) to_utf8(vc, keysym);
+ return;
+ }
+
+ type -= 0xf0;
+
+ if (raw_mode && type != KT_SPEC && type != KT_SHIFT)
+ return;
+
+ 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];
+ }
+ }
+
+ (*k_handler[type])(vc, keysym & 0xff, !down, regs);
+
+ 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), handle->dev->regs);
+ tasklet_schedule(&keyboard_tasklet);
+ do_poke_blanked_console = 1;
+ schedule_console_callback();
+}
+
+static char kbd_name[] = "kbd";
+
+/*
+ * 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 struct input_handle *kbd_connect(struct input_handler *handler,
+ struct input_dev *dev,
+ struct input_device_id *id)
+{
+ struct input_handle *handle;
+ 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 NULL;
+
+ if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
+ return NULL;
+ memset(handle, 0, sizeof(struct input_handle));
+
+ handle->dev = dev;
+ handle->handler = handler;
+ handle->name = kbd_name;
+
+ input_open_device(handle);
+ kbd_refresh_leds(handle);
+
+ return handle;
+}
+
+static void kbd_disconnect(struct input_handle *handle)
+{
+ input_close_device(handle);
+ kfree(handle);
+}
+
+static struct input_device_id kbd_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT(EV_KEY) },
+ },
+
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT(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,
+ .name = "kbd",
+ .id_table = kbd_ids,
+};
+
+int __init kbd_init(void)
+{
+ int i;
+
+ kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS;
+ kbd0.ledmode = LED_SHOW_FLAGS;
+ kbd0.lockstate = KBD_DEFLOCK;
+ kbd0.slockstate = 0;
+ kbd0.modeflags = KBD_DEFMODE;
+ kbd0.kbdmode = VC_XLATE;
+
+ for (i = 0 ; i < MAX_NR_CONSOLES ; i++)
+ kbd_table[i] = kbd0;
+
+ input_register_handler(&kbd_handler);
+
+ tasklet_enable(&keyboard_tasklet);
+ tasklet_schedule(&keyboard_tasklet);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 11:04:03 +0000