3 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 /* ------------------------------------------------------------------------- */
33 #ifdef CONFIG_MODEM_SUPPORT
34 static int key_pressed(void);
35 extern void disable_putc(void);
36 extern int do_mdm_init; /* defined in common/main.c */
39 * We need a delay of at least 500 us after turning on the VFD clock
40 * before we can read any useful information for the CPLD controlling
41 * the keyboard switches. Let's play safe and wait 5 ms. The problem
42 * is that timers are not available yet, so we use a manually timed
45 #define KBD_MDELAY 5000
46 static void udelay_no_timer (int usec)
48 DECLARE_GLOBAL_DATA_PTR;
53 for (i = 0; i < delay; i ++) gd->bd->bi_arch_number = 145;
55 #endif /* CONFIG_MODEM_SUPPORT */
58 * Miscellaneous platform dependent initialisations
63 #if defined(CONFIG_VFD)
64 extern int vfd_init_clocks(void);
66 DECLARE_GLOBAL_DATA_PTR;
68 /* memory and cpu-speed are setup before relocation */
69 #ifdef CONFIG_TRAB_50MHZ
70 /* change the clock to be 50 MHz 1:1:1 */
71 /* MDIV:0x5c PDIV:4 SDIV:2 */
75 /* change the clock to be 133 MHz 1:2:4 */
76 /* MDIV:0x7d PDIV:4 SDIV:1 */
81 /* set up the I/O ports */
85 /* INPUT nCTS0 nRTS0 TXD[1] TXD[0] RXD[1] RXD[0] */
86 /* 00, 10, 10, 10, 10, 10, 10 */
87 rPFCON = (2<<0) | (2<<2) | (2<<4) | (2<<6) | (2<<8) | (2<<10);
89 /* do not pull up RXD0, RXD1, TXD0, TXD1, CTS0, RTS0 */
90 rPFUP = (1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<4) | (1<<5);
92 /* do not pull up RXD0, RXD1, TXD0, TXD1 */
93 rPFUP = (1<<0) | (1<<1) | (1<<2) | (1<<3);
99 /* arch number of SAMSUNG-Board */
100 /* MACH_TYPE_SMDK2400 */
101 /* XXX this isn't really correct, but keep it for now */
102 gd->bd->bi_arch_number = 145;
104 /* adress of boot parameters */
105 gd->bd->bi_boot_params = 0x0c000100;
109 #endif /* CONFIG_VFD */
111 #ifdef CONFIG_MODEM_SUPPORT
112 udelay_no_timer (KBD_MDELAY);
115 disable_putc(); /* modem doesn't understand banner etc */
118 #endif /* CONFIG_MODEM_SUPPORT */
125 DECLARE_GLOBAL_DATA_PTR;
127 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
128 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
132 /*-----------------------------------------------------------------------
133 * Keyboard Controller
136 /* Maximum key number */
137 #define KEYBD_KEY_NUM 4
139 #define KBD_DATA (((*(volatile ulong *)0x04020000) >> 16) & 0xF)
141 static uchar *key_match (ulong);
143 int misc_init_r (void)
145 ulong kbd_data = KBD_DATA;
146 uchar keybd_env[KEYBD_KEY_NUM + 1];
150 for (i = 0; i < KEYBD_KEY_NUM; ++i) {
151 keybd_env[i] = '0' + ((kbd_data >> i) & 1);
154 debug ("** Setting keybd=\"%s\"\n", keybd_env);
155 setenv ("keybd", keybd_env);
157 str = strdup (key_match (kbd_data)); /* decode keys */
159 #ifdef CONFIG_PREBOOT /* automatically configure "preboot" command on key match */
160 debug ("** Setting preboot=\"%s\"\n", str);
161 setenv ("preboot", str); /* set or delete definition */
162 #endif /* CONFIG_PREBOOT */
170 #ifdef CONFIG_PREBOOT
172 static uchar kbd_magic_prefix[] = "key_magic";
173 static uchar kbd_command_prefix[] = "key_cmd";
175 static int compare_magic (ulong kbd_data, uchar *str)
179 debug ("compare_magic: kbd: %04lx str: \"%s\"\n",kbd_data,str);
182 uchar c = *str - '1';
184 if (c >= KEYBD_KEY_NUM) /* bad key number */
189 if (!(kbd_data & key_mask)) { /* key not pressed */
190 debug ( "compare_magic: "
191 "kbd: %04lx mask: %04lx - key not pressed\n",
192 kbd_data, key_mask );
196 kbd_data &= ~key_mask;
199 if (kbd_data) { /* key(s) not released */
200 debug ( "compare_magic: "
201 "kbd: %04lx - key(s) not released\n", kbd_data);
208 /*-----------------------------------------------------------------------
209 * Check if pressed key(s) match magic sequence,
210 * and return the command string associated with that key(s).
212 * If no key press was decoded, NULL is returned.
214 * Note: the first character of the argument will be overwritten with
215 * the "magic charcter code" of the decoded key(s), or '\0'.
218 * Note: the string points to static environment data and must be
219 * saved before you call any function that modifies the environment.
221 static uchar *key_match (ulong kbd_data)
223 uchar magic[sizeof (kbd_magic_prefix) + 1];
224 uchar cmd_name[sizeof (kbd_command_prefix) + 1];
226 uchar *kbd_magic_keys;
229 * The following string defines the characters that can pe appended
230 * to "key_magic" to form the names of environment variables that
231 * hold "magic" key codes, i. e. such key codes that can cause
232 * pre-boot actions. If the string is empty (""), then only
233 * "key_magic" is checked (old behaviour); the string "125" causes
234 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
236 if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
239 debug ("key_match: magic_keys=\"%s\"\n", kbd_magic_keys);
241 /* loop over all magic keys;
242 * use '\0' suffix in case of empty string
244 for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix)
246 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
248 debug ("key_match: magic=\"%s\"\n",
249 getenv(magic) ? getenv(magic) : "<UNDEFINED>");
251 if (compare_magic(kbd_data, getenv(magic)) == 0)
253 sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
254 debug ("key_match: cmdname %s=\"%s\"\n",
259 return (getenv (cmd_name));
262 debug ("key_match: no match\n");
265 #endif /* CONFIG_PREBOOT */
267 /* Read Keyboard status */
268 int do_kbd (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
270 ulong kbd_data = KBD_DATA;
271 uchar keybd_env[KEYBD_KEY_NUM + 1];
275 for (i = 0; i < KEYBD_KEY_NUM; ++i) {
276 keybd_env[i] = '0' + ((kbd_data >> i) & 1);
277 printf (" %c", keybd_env[i]);
281 setenv ("keybd", keybd_env);
285 #ifdef CONFIG_MODEM_SUPPORT
286 static int key_pressed(void)
288 return (compare_magic(KBD_DATA, CONFIG_MODEM_KEY_MAGIC) == 0);
290 #endif /* CONFIG_MODEM_SUPPORT */