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authorwdenk <wdenk>2002-11-03 00:24:07 +0000
committerwdenk <wdenk>2002-11-03 00:24:07 +0000
commitc609719b8d1b2dca590e0ed499016d041203e403 (patch)
tree7ea1755d80903ff972f312a249eb856061d40e15 /board/trab/trab.c
parent5b1d713721c3ea02549940133f09236783dda1f9 (diff)
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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 */