Merge commit '87ddedd'

1 files changed, 305 insertions, 0 deletions

diff --git a/drivers/input/keyboard.c b/drivers/input/keyboard.c
new file mode 100644
index 0000000..9975202
--- /dev/null
+++ b/drivers/input/keyboard.c
@@ -0,0 +1,305 @@
+/***********************************************************************
+ *
+ * (C) Copyright 2004
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ * All rights reserved.
+ *
+ * Keyboard driver
+ *
+ ***********************************************************************/
+
+#include <common.h>
+
+#ifdef CONFIG_PS2KBD
+
+#include <devices.h>
+#include <keyboard.h>
+
+#undef KBG_DEBUG
+
+#ifdef KBG_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+
+#define	DEVNAME			"kbd"
+
+#define	LED_SCR			0x01	/* scroll lock led */
+#define	LED_CAP			0x04	/* caps lock led */
+#define	LED_NUM			0x02	/* num lock led */
+
+#define	KBD_BUFFER_LEN		0x20  /* size of the keyboardbuffer */
+
+#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+int ps2ser_check(void);
+#endif
+
+static volatile char kbd_buffer[KBD_BUFFER_LEN];
+static volatile int in_pointer = 0;
+static volatile int out_pointer = 0;
+
+static unsigned char leds = 0;
+static unsigned char num_lock = 0;
+static unsigned char caps_lock = 0;
+static unsigned char scroll_lock = 0;
+static unsigned char shift = 0;
+static unsigned char ctrl = 0;
+static unsigned char alt = 0;
+static unsigned char e0 = 0;
+
+/******************************************************************
+ * Queue handling
+ ******************************************************************/
+
+/* puts character in the queue and sets up the in and out pointer */
+static void kbd_put_queue(char data)
+{
+	if((in_pointer+1)==KBD_BUFFER_LEN) {
+		if(out_pointer==0) {
+			return; /* buffer full */
+		} else{
+			in_pointer=0;
+		}
+	} else {
+		if((in_pointer+1)==out_pointer)
+			return; /* buffer full */
+		in_pointer++;
+	}
+	kbd_buffer[in_pointer]=data;
+	return;
+}
+
+/* test if a character is in the queue */
+static int kbd_testc(void)
+{
+#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+	/* no ISR is used, so received chars must be polled */
+	ps2ser_check();
+#endif
+	if(in_pointer==out_pointer)
+		return(0); /* no data */
+	else
+		return(1);
+}
+
+/* gets the character from the queue */
+static int kbd_getc(void)
+{
+	char c;
+	while(in_pointer==out_pointer) {
+#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+	/* no ISR is used, so received chars must be polled */
+	ps2ser_check();
+#endif
+	;}
+	if((out_pointer+1)==KBD_BUFFER_LEN)
+		out_pointer=0;
+	else
+		out_pointer++;
+	c=kbd_buffer[out_pointer];
+	return (int)c;
+
+}
+
+/* Simple translation table for the keys */
+
+static unsigned char kbd_plain_xlate[] = {
+	0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t',	/* 0x00 - 0x0f */
+	 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's',	/* 0x10 - 0x1f */
+	 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v',	/* 0x20 - 0x2f */
+	 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
+	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
+	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
+	'\r',0xff,0xff
+	};
+
+static unsigned char kbd_shift_xlate[] = {
+	0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t',	/* 0x00 - 0x0f */
+	 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S',	/* 0x10 - 0x1f */
+	 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V',	/* 0x20 - 0x2f */
+	 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
+	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
+	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
+	'\r',0xff,0xff
+	};
+
+static unsigned char kbd_ctrl_xlate[] = {
+	0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t',	/* 0x00 - 0x0f */
+	0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13,	/* 0x10 - 0x1f */
+	0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16,	/* 0x20 - 0x2f */
+	0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
+	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
+	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
+	'\r',0xff,0xff
+	};
+
+
+void handle_scancode(unsigned char scancode)
+{
+	unsigned char keycode;
+
+	/*  Convert scancode to keycode */
+	PRINTF("scancode %x\n",scancode);
+	if(scancode==0xe0) {
+		e0=1; /* special charakters */
+		return;
+	}
+	if(e0==1) {
+		e0=0; /* delete flag */
+		if(!(	((scancode&0x7F)==0x38)|| /* the right ctrl key */
+					((scancode&0x7F)==0x1D)|| /* the right alt key */
+					((scancode&0x7F)==0x35)||	/* the right '/' key */
+					((scancode&0x7F)==0x1C) ))  /* the right enter key */
+			/* we swallow unknown e0 codes */
+			return;
+	}
+	/* special cntrl keys */
+	switch(scancode) {
+	case 0x2A:
+	case 0x36: /* shift pressed */
+		shift=1;
+		return; /* do nothing else */
+	case 0xAA:
+	case 0xB6: /* shift released */
+		shift=0;
+		return; /* do nothing else */
+	case 0x38: /* alt pressed */
+		alt=1;
+		return; /* do nothing else */
+	case 0xB8: /* alt released */
+		alt=0;
+		return; /* do nothing else */
+	case 0x1d: /* ctrl pressed */
+		ctrl=1;
+		return; /* do nothing else */
+	case 0x9d: /* ctrl released */
+		ctrl=0;
+		return; /* do nothing else */
+	case 0x46: /* scrollock pressed */
+		scroll_lock=~scroll_lock;
+		if(scroll_lock==0)
+			leds&=~LED_SCR; /* switch LED off */
+		else
+			leds|=LED_SCR; /* switch on LED */
+		pckbd_leds(leds);
+		return; /* do nothing else */
+	case 0x3A: /* capslock pressed */
+		caps_lock=~caps_lock;
+		if(caps_lock==0)
+			leds&=~LED_CAP; /* switch caps_lock off */
+		else
+			leds|=LED_CAP; /* switch on LED */
+		pckbd_leds(leds);
+		return;
+	case 0x45: /* numlock pressed */
+		num_lock=~num_lock;
+		if(num_lock==0)
+			leds&=~LED_NUM; /* switch LED off */
+		else
+			leds|=LED_NUM;  /* switch on LED */
+		pckbd_leds(leds);
+		return;
+	case 0xC6: /* scroll lock released */
+	case 0xC5: /* num lock released */
+	case 0xBA: /* caps lock released */
+		return; /* just swallow */
+	}
+#if 1
+	if((scancode&0x80)==0x80) /* key released */
+		return;
+#else
+	if((scancode&0x80)==0x00) /* key pressed */
+		return;
+	scancode &= ~0x80;
+#endif
+	/* now, decide which table we need */
+	if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
+		PRINTF("unkown scancode %X\n",scancode);
+		return; /* swallow it */
+	}
+	/* setup plain code first */
+	keycode=kbd_plain_xlate[scancode];
+	if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
+		if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
+			PRINTF("unkown caps-locked scancode %X\n",scancode);
+			return; /* swallow it */
+		}
+		keycode=kbd_shift_xlate[scancode];
+		if(keycode<'A') { /* we only want the alphas capital */
+			keycode=kbd_plain_xlate[scancode];
+		}
+	}
+	if(shift==1) { /* shift overwrites caps_lock */
+		if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
+			PRINTF("unkown shifted scancode %X\n",scancode);
+			return; /* swallow it */
+		}
+		keycode=kbd_shift_xlate[scancode];
+	}
+	if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
+		if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
+			PRINTF("unkown ctrl scancode %X\n",scancode);
+			return; /* swallow it */
+		}
+		keycode=kbd_ctrl_xlate[scancode];
+	}
+	/* check if valid keycode */
+	if(keycode==0xff) {
+		PRINTF("unkown scancode %X\n",scancode);
+		return; /* swallow unknown codes */
+	}
+
+	kbd_put_queue(keycode);
+	PRINTF("%x\n",keycode);
+}
+
+/******************************************************************
+ * Init
+ ******************************************************************/
+
+#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
+extern int overwrite_console (void);
+#define OVERWRITE_CONSOLE overwrite_console ()
+#else
+#define OVERWRITE_CONSOLE 0
+#endif /* CFG_CONSOLE_OVERWRITE_ROUTINE */
+
+int kbd_init (void)
+{
+	int error;
+  	device_t kbddev ;
+	char *stdinname  = getenv ("stdin");
+
+	if(kbd_init_hw()==-1)
+		return -1;
+  	memset (&kbddev, 0, sizeof(kbddev));
+  	strcpy(kbddev.name, DEVNAME);
+  	kbddev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+  	kbddev.putc = NULL ;
+	kbddev.puts = NULL ;
+	kbddev.getc = kbd_getc ;
+	kbddev.tstc = kbd_testc ;
+
+ 	error = device_register (&kbddev);
+	if(error==0) {
+		/* check if this is the standard input device */
+		if(strcmp(stdinname,DEVNAME)==0) {
+			/* reassign the console */
+			if(OVERWRITE_CONSOLE) {
+				return 1;
+			}
+			error=console_assign(stdin,DEVNAME);
+			if(error==0)
+				return 1;
+			else
+				return error;
+		}
+		return 1;
+	}
+	return error;
+}
+
+#endif /* CONFIG_PS2KBD */