board/trab/trab.c

   1 /*
   2  * (C) Copyright 2002
   3  * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   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.
  12  *
  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.
  17  *
  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,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /* #define DEBUG */
  25
  26 #include <common.h>
  27 #include <malloc.h>
  28 #include <s3c2400.h>
  29 #include <command.h>
  30
  31 /* ------------------------------------------------------------------------- */
  32
  33 #ifdef CFG_BRIGHTNESS
  34 static void spi_init(void);
  35 static void wait_transmit_done(void);
  36 static void tsc2000_write(unsigned int page, unsigned int reg,
  37                                                   unsigned int data);
  38 static void tsc2000_set_brightness(void);
  39 #endif
  40 #ifdef CONFIG_MODEM_SUPPORT
  41 static int key_pressed(void);
  42 extern void disable_putc(void);
  43 extern int do_mdm_init; /* defined in common/main.c */
  44
  45 /*
  46  * We need a delay of at least 500 us after turning on the VFD clock
  47  * before we can read any useful information for the CPLD controlling
  48  * the keyboard switches. Let's play safe and wait 5 ms. The problem
  49  * is that timers are not available yet, so we use a manually timed
  50  * loop.
  51  */
  52 #define KBD_MDELAY      5000
  53 static void udelay_no_timer (int usec)
  54 {
  55         DECLARE_GLOBAL_DATA_PTR;
  56
  57         int i;
  58         int delay = usec * 3;
  59
  60         for (i = 0; i < delay; i ++) gd->bd->bi_arch_number = MACH_TYPE_TRAB;
  61 }
  62 #endif /* CONFIG_MODEM_SUPPORT */
  63
  64 /*
  65  * Miscellaneous platform dependent initialisations
  66  */
  67
  68 int board_init ()
  69 {
  70 #if defined(CONFIG_VFD)
  71         extern int vfd_init_clocks(void);
  72 #endif
  73         DECLARE_GLOBAL_DATA_PTR;
  74         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
  75         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
  76
  77         /* memory and cpu-speed are setup before relocation */
  78 #ifdef CONFIG_TRAB_50MHZ
  79         /* change the clock to be 50 MHz 1:1:1 */
  80         /* MDIV:0x5c PDIV:4 SDIV:2 */
  81         clk_power->MPLLCON = 0x5c042;
  82         clk_power->CLKDIVN = 0;
  83 #else
  84         /* change the clock to be 133 MHz 1:2:4 */
  85         /* MDIV:0x7d PDIV:4 SDIV:1 */
  86         clk_power->MPLLCON = 0x7d041;
  87         clk_power->CLKDIVN = 3;
  88 #endif
  89
  90         /* set up the I/O ports */
  91         gpio->PACON = 0x3ffff;
  92         gpio->PBCON = 0xaaaaaaaa;
  93         gpio->PBUP  = 0xffff;
  94         /* INPUT nCTS0 nRTS0 TXD[1] TXD[0] RXD[1] RXD[0]        */
  95         /*  00,    10,      10,      10,      10,      10,      10      */
  96         gpio->PFCON = (2<<0) | (2<<2) | (2<<4) | (2<<6) | (2<<8) | (2<<10);
  97 #ifdef CONFIG_HWFLOW
  98         /* do not pull up RXD0, RXD1, TXD0, TXD1, CTS0, RTS0 */
  99         gpio->PFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<4) | (1<<5);
 100 #else
 101         /* do not pull up RXD0, RXD1, TXD0, TXD1 */
 102         gpio->PFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3);
 103 #endif
 104         gpio->PGCON = 0x0;
 105         gpio->PGUP  = 0x0;
 106         gpio->OPENCR= 0x0;
 107
 108         /* suppress flicker of the VFDs */
 109         gpio->MISCCR = 0x40;
 110         gpio->PFCON |= (2<<12);
 111
 112         gd->bd->bi_arch_number = MACH_TYPE_TRAB;
 113
 114         /* adress of boot parameters */
 115         gd->bd->bi_boot_params = 0x0c000100;
 116
 117         /* Make sure both buzzers are turned off */
 118         gpio->PDCON |= 0x5400;
 119         gpio->PDDAT &= ~0xE0;
 120
 121 #ifdef CONFIG_VFD
 122         vfd_init_clocks();
 123 #endif /* CONFIG_VFD */
 124
 125 #ifdef CONFIG_MODEM_SUPPORT
 126         udelay_no_timer (KBD_MDELAY);
 127
 128         if (key_pressed()) {
 129                 disable_putc(); /* modem doesn't understand banner etc */
 130                 do_mdm_init = 1;
 131         }
 132 #endif  /* CONFIG_MODEM_SUPPORT */
 133
 134 #ifdef CONFIG_DRIVER_S3C24X0_I2C
 135         /* Configure I/O ports PG5 und PG6 for I2C */
 136         gpio->PGCON = (gpio->PGCON & 0x003c00) | 0x003c00;
 137 #endif /* CONFIG_DRIVER_S3C24X0_I2C */
 138
 139         return 0;
 140 }
 141
 142 int dram_init (void)
 143 {
 144         DECLARE_GLOBAL_DATA_PTR;
 145
 146         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 147         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
 148         return 0;
 149 }
 150
 151 /*-----------------------------------------------------------------------
 152  * Keyboard Controller
 153  */
 154
 155 /* Maximum key number */
 156 #define KEYBD_KEY_NUM           4
 157
 158 #define KBD_DATA        (((*(volatile ulong *)0x04020000) >> 16) & 0xF)
 159
 160 static uchar *key_match (ulong);
 161
 162 int misc_init_r (void)
 163 {
 164         ulong kbd_data = KBD_DATA;
 165         uchar keybd_env[KEYBD_KEY_NUM + 1];
 166         uchar *str;
 167         int i;
 168
 169 #ifdef CONFIG_AUTO_UPDATE
 170         extern int do_auto_update(void);
 171         /* this has priority over all else */
 172         do_auto_update();
 173 #endif
 174
 175         for (i = 0; i < KEYBD_KEY_NUM; ++i) {
 176                 keybd_env[i] = '0' + ((kbd_data >> i) & 1);
 177         }
 178         keybd_env[i] = '\0';
 179         debug ("** Setting keybd=\"%s\"\n", keybd_env);
 180         setenv ("keybd", keybd_env);
 181
 182         str = strdup (key_match (kbd_data));    /* decode keys */
 183
 184 #ifdef CONFIG_PREBOOT   /* automatically configure "preboot" command on key match */
 185         debug ("** Setting preboot=\"%s\"\n", str);
 186         setenv ("preboot", str);        /* set or delete definition */
 187 #endif /* CONFIG_PREBOOT */
 188         if (str != NULL) {
 189                 free (str);
 190         }
 191
 192 #ifdef CFG_BRIGHTNESS
 193         tsc2000_set_brightness();
 194 #endif
 195         return (0);
 196 }
 197
 198 #ifdef CONFIG_PREBOOT
 199
 200 static uchar kbd_magic_prefix[] = "key_magic";
 201 static uchar kbd_command_prefix[] = "key_cmd";
 202
 203 static int compare_magic (ulong kbd_data, uchar *str)
 204 {
 205         uchar key_mask;
 206
 207         debug ("compare_magic: kbd: %04lx  str: \"%s\"\n",kbd_data,str);
 208         for (; *str; str++)
 209         {
 210                 uchar c = *str - '1';
 211
 212                 if (c >= KEYBD_KEY_NUM)         /* bad key number */
 213                         return -1;
 214
 215                 key_mask = 1 << c;
 216
 217                 if (!(kbd_data & key_mask)) {   /* key not pressed */
 218                         debug ( "compare_magic: "
 219                                 "kbd: %04lx mask: %04lx - key not pressed\n",
 220                                 kbd_data, key_mask );
 221                         return -1;
 222                 }
 223
 224                 kbd_data &= ~key_mask;
 225         }
 226
 227         if (kbd_data) {                         /* key(s) not released */
 228                 debug ( "compare_magic: "
 229                         "kbd: %04lx - key(s) not released\n", kbd_data);
 230                 return -1;
 231         }
 232
 233         return 0;
 234 }
 235
 236 /*-----------------------------------------------------------------------
 237  * Check if pressed key(s) match magic sequence,
 238  * and return the command string associated with that key(s).
 239  *
 240  * If no key press was decoded, NULL is returned.
 241  *
 242  * Note: the first character of the argument will be overwritten with
 243  * the "magic charcter code" of the decoded key(s), or '\0'.
 244  *
 245  *
 246  * Note: the string points to static environment data and must be
 247  * saved before you call any function that modifies the environment.
 248  */
 249 static uchar *key_match (ulong kbd_data)
 250 {
 251         uchar magic[sizeof (kbd_magic_prefix) + 1];
 252         uchar cmd_name[sizeof (kbd_command_prefix) + 1];
 253         uchar *suffix;
 254         uchar *kbd_magic_keys;
 255
 256         /*
 257          * The following string defines the characters that can pe appended
 258          * to "key_magic" to form the names of environment variables that
 259          * hold "magic" key codes, i. e. such key codes that can cause
 260          * pre-boot actions. If the string is empty (""), then only
 261          * "key_magic" is checked (old behaviour); the string "125" causes
 262          * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
 263          */
 264         if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
 265                 kbd_magic_keys = "";
 266
 267         debug ("key_match: magic_keys=\"%s\"\n", kbd_magic_keys);
 268
 269         /* loop over all magic keys;
 270          * use '\0' suffix in case of empty string
 271          */
 272         for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix)
 273         {
 274                 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
 275
 276                 debug ("key_match: magic=\"%s\"\n",
 277                         getenv(magic) ? getenv(magic) : "<UNDEFINED>");
 278
 279                 if (compare_magic(kbd_data, getenv(magic)) == 0)
 280                 {
 281                         sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
 282                         debug ("key_match: cmdname %s=\"%s\"\n",
 283                                 cmd_name,
 284                                 getenv (cmd_name) ?
 285                                         getenv (cmd_name) :
 286                                         "<UNDEFINED>");
 287                         return (getenv (cmd_name));
 288                 }
 289         }
 290         debug ("key_match: no match\n");
 291         return (NULL);
 292 }
 293 #endif                                                  /* CONFIG_PREBOOT */
 294
 295 /* Read Keyboard status */
 296 int do_kbd (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 297 {
 298         ulong kbd_data = KBD_DATA;
 299         uchar keybd_env[KEYBD_KEY_NUM + 1];
 300         int i;
 301
 302         puts ("Keys:");
 303         for (i = 0; i < KEYBD_KEY_NUM; ++i) {
 304                 keybd_env[i] = '0' + ((kbd_data >> i) & 1);
 305                 printf (" %c", keybd_env[i]);
 306         }
 307         keybd_env[i] = '\0';
 308         putc ('\n');
 309         setenv ("keybd", keybd_env);
 310         return 0;
 311 }
 312
 313 U_BOOT_CMD(
 314         kbd,    1,      1,      do_kbd,
 315         "kbd     - read keyboard status\n",
 316         NULL
 317 );
 318
 319 #ifdef CONFIG_MODEM_SUPPORT
 320 static int key_pressed(void)
 321 {
 322         return (compare_magic(KBD_DATA, CONFIG_MODEM_KEY_MAGIC) == 0);
 323 }
 324 #endif  /* CONFIG_MODEM_SUPPORT */
 325
 326 #ifdef CFG_BRIGHTNESS
 327
 328 static inline void SET_CS_TOUCH(void)
 329 {
 330         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
 331
 332         gpio->PDDAT &= 0x5FF;
 333 }
 334
 335 static inline void CLR_CS_TOUCH(void)
 336 {
 337         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
 338
 339         gpio->PDDAT |= 0x200;
 340 }
 341
 342 static void spi_init(void)
 343 {
 344         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
 345         S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();
 346         int i;
 347
 348         /* Configure I/O ports. */
 349         gpio->PDCON = (gpio->PDCON & 0xF3FFFF) | 0x040000;
 350         gpio->PGCON = (gpio->PGCON & 0x0F3FFF) | 0x008000;
 351         gpio->PGCON = (gpio->PGCON & 0x0CFFFF) | 0x020000;
 352         gpio->PGCON = (gpio->PGCON & 0x03FFFF) | 0x080000;
 353
 354         CLR_CS_TOUCH();
 355
 356         spi->ch[0].SPPRE = 0x1F; /* Baudrate ca. 514kHz */
 357         spi->ch[0].SPPIN = 0x01;  /* SPI-MOSI holds Level after last bit */
 358         spi->ch[0].SPCON = 0x1A;  /* Polling, Prescaler, Master, CPOL=0, CPHA=1 */
 359
 360         /* Dummy byte ensures clock to be low. */
 361         for (i = 0; i < 10; i++) {
 362                 spi->ch[0].SPTDAT = 0xFF;
 363         }
 364         wait_transmit_done();
 365 }
 366
 367 static void wait_transmit_done(void)
 368 {
 369         S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();
 370
 371         while (!(spi->ch[0].SPSTA & 0x01)); /* wait until transfer is done */
 372 }
 373
 374 static void tsc2000_write(unsigned int page, unsigned int reg,
 375                                                   unsigned int data)
 376 {
 377         S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();
 378         unsigned int command;
 379
 380         SET_CS_TOUCH();
 381         command = 0x0000;
 382         command |= (page << 11);
 383         command |= (reg << 5);
 384
 385         spi->ch[0].SPTDAT = (command & 0xFF00) >> 8;
 386         wait_transmit_done();
 387         spi->ch[0].SPTDAT = (command & 0x00FF);
 388         wait_transmit_done();
 389         spi->ch[0].SPTDAT = (data & 0xFF00) >> 8;
 390         wait_transmit_done();
 391         spi->ch[0].SPTDAT = (data & 0x00FF);
 392         wait_transmit_done();
 393
 394         CLR_CS_TOUCH();
 395 }
 396
 397 static void tsc2000_set_brightness(void)
 398 {
 399         uchar tmp[10];
 400         int i, br;
 401
 402         spi_init();
 403         tsc2000_write(1, 2, 0x0); /* Power up DAC */
 404
 405         i = getenv_r("brightness", tmp, sizeof(tmp));
 406         br = (i > 0)
 407                 ? (int) simple_strtoul (tmp, NULL, 10)
 408                 : CFG_BRIGHTNESS;
 409
 410         tsc2000_write(0, 0xb, br & 0xff);
 411 }
 412 #endif