Initial revision

1 files changed, 301 insertions, 0 deletions

diff --git a/board/trab/trab.c b/board/trab/trab.c
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+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <cmd_bsp.h>
+#include <malloc.h>
+#include <s3c2400.h>
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_MODEM_SUPPORT
+static int key_pressed(void);
+extern void disable_putc(void);
+extern int do_mdm_init; /* defined in common/main.c */
+
+/*
+ * We need a delay of at least 500 us after turning on the VFD clock
+ * before we can read any useful information for the CPLD controlling
+ * the keyboard switches. Let's play safe and wait 5 ms. The problem
+ * is that timers are not available yet, so we use a manually timed
+ * loop.
+ */
+#define KBD_MDELAY	100000	/* 1000 */
+static void mdelay_no_timer (int msec)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	int i;
+	int delay = msec * 3;
+
+	for (i = 0; i < delay; i ++) gd->bd->bi_arch_number = 145;
+}
+#endif /* CONFIG_MODEM_SUPPORT */
+
+/*
+ * Miscellaneous platform dependent initialisations
+ */
+
+int board_init ()
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	/* memory and cpu-speed are setup before relocation */
+#ifdef CONFIG_TRAB_50MHZ
+	/* change the clock to be 50 MHz 1:1:1 */
+	/* MDIV:0x5c PDIV:4 SDIV:2 */
+	rMPLLCON = 0x5c042;
+	rCLKDIVN = 0;
+#else
+	/* change the clock to be 133 MHz 1:2:4 */
+	/* MDIV:0x7d PDIV:4 SDIV:1 */
+	rMPLLCON = 0x7d041;
+	rCLKDIVN = 3;
+#endif
+
+	/* set up the I/O ports */
+	rPACON = 0x3ffff;
+	rPBCON = 0xaaaaaaaa;
+	rPBUP  = 0xffff;
+	/* INPUT nCTS0 nRTS0 TXD[1] TXD[0] RXD[1] RXD[0]	*/
+	/*  00,    10,      10,      10,      10,      10,      10 	*/
+	rPFCON = (2<<0) | (2<<2) | (2<<4) | (2<<6) | (2<<8) | (2<<10);
+#ifdef CONFIG_HWFLOW
+	/* do not pull up RXD0, RXD1, TXD0, TXD1, CTS0, RTS0 */
+	rPFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<4) | (1<<5);
+#else
+	/* do not pull up RXD0, RXD1, TXD0, TXD1 */
+	rPFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3);
+#endif
+	rPGCON = 0x0;
+	rPGUP  = 0x0;
+	rOPENCR= 0x0;
+
+	/* arch number of SAMSUNG-Board */
+	/* MACH_TYPE_SMDK2400 */
+	/* XXX this isn't really correct, but keep it for now */
+	gd->bd->bi_arch_number = 145;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = 0x0c000100;
+
+#ifdef CONFIG_MODEM_SUPPORT
+	/* This stuff is needed to get interrupts on stop-position
+	 * contact events.
+	 * (Copied from the LCD initialization routine.)
+	 */
+	if (rLCDCON1 == 0)
+	{
+		rPCCON = (rPCCON & 0xFFFFFF00)| 0x000000AA;
+		rPDCON = (rPDCON & 0xFFFFFF03)| 0x000000A8;
+#if 0
+		rPDCON = (rPDCON & 0xFFFFFF00)| 0x000000AA;
+#endif
+		rLCDCON2 = 0x000DC000;
+		rLCDCON3 = 0x0051000A;
+		rLCDCON4 = 0x00000001;
+		rLCDCON5 = 0x00000440;
+		rLCDCON1 = 0x00000B75;
+	}
+
+	mdelay_no_timer (KBD_MDELAY);
+
+	if (key_pressed()) {
+		disable_putc();	/* modem doesn't understand banner etc */
+		do_mdm_init = 1;
+	}
+#endif	/* CONFIG_MODEM_SUPPORT */
+
+	return 0;
+}
+
+int dram_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Keyboard Controller
+ */
+
+/* Maximum key number */
+#define KEYBD_KEY_NUM		4
+
+#define KBD_DATA	(((*(volatile ulong *)0x04020000) >> 16) & 0xF)
+
+static uchar *key_match (ulong);
+
+int misc_init_r (void)
+{
+	ulong kbd_data = KBD_DATA;
+	uchar keybd_env[KEYBD_KEY_NUM + 1];
+	uchar *str;
+	int i;
+
+	for (i = 0; i < KEYBD_KEY_NUM; ++i) {
+		keybd_env[i] = '0' + ((kbd_data >> i) & 1);
+	}
+	keybd_env[i] = '\0';
+	debug ("** Setting keybd=\"%s\"\n", keybd_env);
+	setenv ("keybd", keybd_env);
+
+	str = strdup (key_match (kbd_data));	/* decode keys */
+
+#ifdef CONFIG_PREBOOT	/* automatically configure "preboot" command on key match */
+	debug ("** Setting preboot=\"%s\"\n", str);
+	setenv ("preboot", str);	/* set or delete definition */
+#endif /* CONFIG_PREBOOT */
+	if (str != NULL) {
+		free (str);
+	}
+
+	return (0);
+}
+
+#ifdef CONFIG_PREBOOT
+
+static uchar kbd_magic_prefix[] = "key_magic";
+static uchar kbd_command_prefix[] = "key_cmd";
+
+static int compare_magic (ulong kbd_data, uchar *str)
+{
+	uchar key_mask;
+
+	debug ("compare_magic: kbd: %04lx  str: \"%s\"\n",kbd_data,str);
+	for (; *str; str++)
+	{
+		uchar c = *str - '1';
+
+		if (c >= KEYBD_KEY_NUM)		/* bad key number */
+			return -1;
+
+		key_mask = 1 << c;
+
+		if (!(kbd_data & key_mask)) {	/* key not pressed */
+			debug ( "compare_magic: "
+				"kbd: %04lx mask: %04lx - key not pressed\n",
+				kbd_data, key_mask );
+			return -1;
+		}
+
+		kbd_data &= ~key_mask;
+	}
+
+	if (kbd_data) {				/* key(s) not released */
+		debug ( "compare_magic: "
+			"kbd: %04lx - key(s) not released\n", kbd_data);
+		return -1;
+	}
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Check if pressed key(s) match magic sequence,
+ * and return the command string associated with that key(s).
+ *
+ * If no key press was decoded, NULL is returned.
+ *
+ * Note: the first character of the argument will be overwritten with
+ * the "magic charcter code" of the decoded key(s), or '\0'.
+ *
+ *
+ * Note: the string points to static environment data and must be
+ * saved before you call any function that modifies the environment.
+ */
+static uchar *key_match (ulong kbd_data)
+{
+	uchar magic[sizeof (kbd_magic_prefix) + 1];
+	uchar cmd_name[sizeof (kbd_command_prefix) + 1];
+	uchar *suffix;
+	uchar *kbd_magic_keys;
+
+	/*
+	 * The following string defines the characters that can pe appended
+	 * to "key_magic" to form the names of environment variables that
+	 * hold "magic" key codes, i. e. such key codes that can cause
+	 * pre-boot actions. If the string is empty (""), then only
+	 * "key_magic" is checked (old behaviour); the string "125" causes
+	 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
+	 */
+	if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
+		kbd_magic_keys = "";
+
+	debug ("key_match: magic_keys=\"%s\"\n", kbd_magic_keys);
+
+	/* loop over all magic keys;
+	 * use '\0' suffix in case of empty string
+	 */
+	for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix)
+	{
+		sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
+
+		debug ("key_match: magic=\"%s\"\n",
+			getenv(magic) ? getenv(magic) : "<UNDEFINED>");
+
+		if (compare_magic(kbd_data, getenv(magic)) == 0)
+		{
+			sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
+			debug ("key_match: cmdname %s=\"%s\"\n",
+				cmd_name,
+				getenv (cmd_name) ?
+					getenv (cmd_name) :
+					"<UNDEFINED>");
+			return (getenv (cmd_name));
+		}
+	}
+	debug ("key_match: no match\n");
+	return (NULL);
+}
+#endif							/* CONFIG_PREBOOT */
+
+/* Read Keyboard status */
+int do_kbd (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	ulong kbd_data = KBD_DATA;
+	uchar keybd_env[KEYBD_KEY_NUM + 1];
+	int i;
+
+	puts ("Keys:");
+	for (i = 0; i < KEYBD_KEY_NUM; ++i) {
+		keybd_env[i] = '0' + ((kbd_data >> i) & 1);
+		printf (" %c", keybd_env[i]);
+	}
+	keybd_env[i] = '\0';
+	putc ('\n');
+	setenv ("keybd", keybd_env);
+	return 0;
+}
+
+#ifdef CONFIG_MODEM_SUPPORT
+static int key_pressed(void)
+{
+	return (compare_magic(KBD_DATA, CONFIG_MODEM_KEY_MAGIC) == 0);
+}
+#endif	/* CONFIG_MODEM_SUPPORT */