patch-2.1.53 linux/arch/ppc/boot/kbd.c

• Lines: 167
• Date: Thu Sep 4 12:54:48 1997
• Orig file: v2.1.52/linux/arch/ppc/boot/kbd.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.52/linux/arch/ppc/boot/kbd.c linux/arch/ppc/boot/kbd.c
@@ -0,0 +1,166 @@
+/* Keyboard handler */
+
+#include <../drivers/char/defkeymap.c> /* yeah I know it's bad */
+
+#define	L		0x0001	/* locking function */
+#define	SHF		0x0002	/* keyboard shift */
+#define	ALT		0x0004	/* alternate shift -- alternate chars */
+#define	NUM		0x0008	/* numeric shift  cursors vs. numeric */
+#define	CTL		0x0010	/* control shift  -- allows ctl function */
+#define	CPS		0x0020	/* caps shift -- swaps case of letter */
+#define	ASCII		0x0040	/* ascii code for this key */
+#define	STP		0x0080	/* stop output */
+#define	FUNC		0x0100	/* function key */
+#define	SCROLL		0x0200	/* scroll lock key */
+
+unsigned char shfts, ctls, alts, caps, num, stp;
+
+#define	KBDATAP		0x60	/* kbd data port */
+#define	KBSTATUSPORT	0x61	/* kbd status */
+#define	KBSTATP		0x64	/* kbd status port */
+#define	KBINRDY		0x01
+#define	KBOUTRDY	0x02
+
+#define _x__ 0x00  /* Unknown / unmapped */
+
+const unsigned short action[] = {
+	0,     ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan  0- 7 */
+	ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan  8-15 */
+	ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan 16-23 */
+	ASCII, ASCII, ASCII, ASCII, ASCII,   CTL, ASCII, ASCII,	/* scan 24-31 */
+	ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan 32-39 */
+	ASCII, ASCII,   SHF, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan 40-47 */
+	ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,   SHF, ASCII,	/* scan 48-55 */
+	  ALT, ASCII,   CPS,  FUNC,  FUNC,  FUNC,  FUNC,  FUNC,	/* scan 56-63 */
+	 FUNC,  FUNC,  FUNC,  FUNC,  FUNC,   NUM,SCROLL, ASCII,	/* scan 64-71 */
+	ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,	/* scan 72-79 */
+	ASCII, ASCII, ASCII, ASCII,     0,     0,     0,     0,	/* scan 80-87 */
+	0,0,0,0,0,0,0,0,	/* scan 88-95 */
+	0,0,0,0,0,0,0,0,	/* scan 96-103 */
+	0,0,0,0,0,0,0,0,	/* scan 104-111 */
+	0,0,0,0,0,0,0,0,	/* scan 112-119 */
+	0,0,0,0,0,0,0,0,	/* scan 120-127 */
+};
+
+static int
+kbd(noblock)
+	int noblock;
+{
+	unsigned char dt, brk, act;
+	int first = 1;	
+loop:
+	if (noblock) {
+		if ((inb(KBSTATP) & KBINRDY) == 0)
+			return (-1);
+	} else while((inb(KBSTATP) & KBINRDY) == 0) ;
+
+	dt = inb(KBDATAP);
+
+	brk = dt & 0x80;	/* brk == 1 on key release */
+	dt = dt & 0x7f;		/* keycode */
+
+	act = action[dt];
+	if (/*act&SHF*/ dt == 54)
+		shfts = brk ? 0 : 1;
+	if (/*act&ALT*/ dt == 48)
+		alts = brk ? 0 : 1;
+	if (/*act&NUM*/ dt == 69)
+		if (act&L) {
+			/* NUM lock */
+			if(!brk)
+				num = !num;
+		} else
+			num = brk ? 0 : 1;
+	if (/*act&CTL*/ dt == 29)
+		ctls = brk ? 0 : 1;
+	if (/*act&CPS*/ dt == 58)
+		if (act&L) {
+			/* CAPS lock */
+			if(!brk)
+				caps = !caps;
+		} else
+			caps = brk ? 0 : 1;
+	if (0/*act&STP*/)
+		if (act&L) {
+			if(!brk)
+				stp = !stp;
+		} else
+			stp = brk ? 0 : 1;
+
+	if ((act&ASCII) && !brk) {
+		unsigned char chr;
+		if (shfts)
+			chr = shift_map[dt];
+		else if (ctls)
+			chr = ctrl_map[dt];
+		else
+			chr = plain_map[dt];
+		if (alts)
+			chr |= 0x80;
+
+		if (caps && (chr >= 'a' && chr <= 'z'))
+			chr -= 'a' - 'A' ;
+		if ( chr == 0x01 ) chr = '\n'; /* hack */
+#define CTRL(s) (s & 0x1F)			
+		if ((chr == '\r') || (chr == '\n') || (chr == CTRL('A')) || (chr == CTRL('S')))
+		{
+			/* Wait for key up */
+			while (1)
+			{
+				while((inb(KBSTATP) & KBINRDY) == 0) ;
+				dt = inb(KBDATAP);
+				if (dt & 0x80) /* key up */ break;
+			}
+		}
+		return (chr);
+	}
+	if (first && brk) return (0);  /* Ignore initial 'key up' codes */
+	goto loop;
+}
+
+static
+scankbd(void) {
+	return (kbd(1) != -1);
+}
+
+static 
+kbdreset(void)
+{
+	unsigned char c;
+	int i;
+
+	/* Send self-test */
+	while (inb(KBSTATP) & KBOUTRDY) ;
+	outb(KBSTATP,0xAA);
+	while ((inb(KBSTATP) & KBINRDY) == 0) ;	/* wait input ready */
+	if ((c = inb(KBDATAP)) != 0x55)
+	{
+		puts("Keyboard self test failed - result:");
+		puthex(c);
+		puts("\n");
+	}
+	/* Enable interrupts and keyboard controller */
+	while (inb(KBSTATP) & KBOUTRDY) ;
+	outb(KBSTATP,0x60);	
+	while (inb(KBSTATP) & KBOUTRDY) ;
+	outb(KBDATAP,0x45);
+	for (i = 0;  i < 10000;  i++) udelay(1);
+	while (inb(KBSTATP) & KBOUTRDY) ;
+	outb(KBSTATP,0xAE);
+}
+
+static int kbd_reset = 0;
+
+CRT_getc(void)
+{
+	int c;
+	if (!kbd_reset) {kbdreset(); kbd_reset++; }
+	while ((c = kbd(0)) == 0) ;
+	return(c);
+}
+
+CRT_tstc(void)
+{
+	if (!kbd_reset) {kbdreset(); kbd_reset++; }
+	return ((inb(KBSTATP) & KBINRDY) != 0);
+}