libpayload: The initial chunk of code writen by AMD

This is the initial chunk of code written by me and copyrighted
by AMD.  Includes everything but a few files that we pulled from
outside sources.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3170 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 126 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c
new file mode 100644
index 0000000000..0dc93713b8
--- /dev/null
+++ b/payloads/libpayload/drivers/keyboard.c
@@ -0,0 +1,126 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2008 Advanced Micro Devices, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <arch/io.h>
+#include <libpayload.h>
+
+unsigned char map[2][0x57] = {
+  {
+    0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
+    0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
+    0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
+    0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
+    0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
+    0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
+    0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
+    0x00, 0x20,
+  },
+  {
+    0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
+    0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
+    0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
+    0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
+    0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
+    0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
+    0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
+    0x00, 0x20,
+  }
+};
+
+#define MOD_SHIFT    1
+#define MOD_CTRL     2
+#define MOD_CAPSLOCK 4
+
+int keyboard_havechar(void)
+{
+	unsigned char c = inb(0x64);
+	return c & 1;
+}
+
+unsigned char keyboard_get_scancode(void)
+{
+	unsigned char ch = 0;
+
+	if (keyboard_havechar())
+		ch = inb(0x60);
+
+	return ch;
+}
+
+int keyboard_getchar(void)
+{
+	static int modifier;
+	unsigned char ch;
+	int shift;
+
+	int ret = 0;
+
+	while(!keyboard_havechar())
+		;
+
+	ch = keyboard_get_scancode();
+
+	switch(ch) {
+	case 0x36:
+	case 0x2a:
+		modifier &= ~MOD_SHIFT;
+		break;
+
+	case 0x80 | 0x36:
+	case 0x80 | 0x2a:
+		modifier |= MOD_SHIFT;
+
+	case 0x1d:
+		modifier &= ~MOD_CTRL;
+		break;
+
+	case 0x80 | 0x1d:
+		modifier |= MOD_CTRL;
+		break;
+
+	case 0x3a:
+		if (modifier & MOD_CAPSLOCK)
+			modifier &= ~MOD_CAPSLOCK;
+		else
+			modifier |= MOD_CAPSLOCK;
+		break;
+	}
+
+	if (!(ch & 0x80) && ch <  0x57) {
+		shift = (modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;
+		ret = map[shift][ch];
+
+		if (modifier & MOD_CTRL)
+		        ret = (ret >= 0x3F && ret <= 0x5F) ? ret & 0x1f : 0;
+
+		return ret;
+	}
+
+	return ret;
+}