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Diffstat (limited to 'board/trab/trab.c')
| -rw-r--r-- | board/trab/trab.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/board/trab/trab.c b/board/trab/trab.c new file mode 100644 index 0000000..3f9b198 --- /dev/null +++ b/board/trab/trab.c @@ -0,0 +1,301 @@ +/* + * (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 */ |