board/lwmon/lwmon.c

   1 /***********************************************************************
   2  *
   3 M* Modul:         lwmon.c
   4 M*
   5 M* Content:       LWMON specific U-Boot commands.
   6  *
   7  * (C) Copyright 2001, 2002
   8  * DENX Software Engineering
   9  * Wolfgang Denk, wd@denx.de
  10  * All rights reserved.
  11  *
  12 D* Design:        wd@denx.de
  13 C* Coding:        wd@denx.de
  14 V* Verification:  dzu@denx.de
  15  *
  16  * See file CREDITS for list of people who contributed to this
  17  * project.
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License as
  21  * published by the Free Software Foundation; either version 2 of
  22  * the License, or (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  32  * MA 02111-1307 USA
  33  ***********************************************************************/
  34
  35 /*---------------------------- Headerfiles ----------------------------*/
  36 #include <common.h>
  37 #include <mpc8xx.h>
  38 #include <commproc.h>
  39 #include <i2c.h>
  40 #include <command.h>
  41 #include <malloc.h>
  42 #include <post.h>
  43 #include <serial.h>
  44
  45 #include <linux/types.h>
  46 #include <linux/string.h>       /* for strdup */
  47
  48 DECLARE_GLOBAL_DATA_PTR;
  49
  50 /*------------------------ Local prototypes ---------------------------*/
  51 static long int dram_size (long int, long int *, long int);
  52 static void kbd_init (void);
  53 static int compare_magic (uchar *kbd_data, uchar *str);
  54
  55
  56 /*--------------------- Local macros and constants --------------------*/
  57 #define _NOT_USED_      0xFFFFFFFF
  58
  59 #ifdef CONFIG_MODEM_SUPPORT
  60 static int key_pressed(void);
  61 extern void disable_putc(void);
  62 #endif /* CONFIG_MODEM_SUPPORT */
  63
  64 /*
  65  * 66 MHz SDRAM access using UPM A
  66  */
  67 const uint sdram_table[] =
  68 {
  69 #if defined(CONFIG_SYS_MEMORY_75) || defined(CONFIG_SYS_MEMORY_8E)
  70         /*
  71          * Single Read. (Offset 0 in UPM RAM)
  72          */
  73         0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
  74         0x1FF5FC47, /* last */
  75         /*
  76          * SDRAM Initialization (offset 5 in UPM RAM)
  77          *
  78          * This is no UPM entry point. The following definition uses
  79          * the remaining space to establish an initialization
  80          * sequence, which is executed by a RUN command.
  81          *
  82          */
  83                     0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
  84         /*
  85          * Burst Read. (Offset 8 in UPM RAM)
  86          */
  87         0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00,
  88         0xF0AFFC00, 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
  89         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  90         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  91         /*
  92          * Single Write. (Offset 18 in UPM RAM)
  93          */
  94         0x1F2DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
  95         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  96         /*
  97          * Burst Write. (Offset 20 in UPM RAM)
  98          */
  99         0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
 100         0xF0AFFC00, 0xE1BAFC04, 0x01FF5FC47, /* last */
 101                                             _NOT_USED_,
 102         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 103         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 104         /*
 105          * Refresh  (Offset 30 in UPM RAM)
 106          */
 107         0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
 108         0xFFFFFC84, 0xFFFFFC07, /* last */
 109                                 _NOT_USED_, _NOT_USED_,
 110         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 111         /*
 112          * Exception. (Offset 3c in UPM RAM)
 113          */
 114         0x7FFFFC07, /* last */
 115                     0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
 116 #endif
 117 #ifdef CONFIG_SYS_MEMORY_7E
 118         /*
 119          * Single Read. (Offset 0 in UPM RAM)
 120          */
 121         0x0E2DBC04, 0x11AF7C04, 0xEFBAFC00, 0x1FF5FC47, /* last */
 122         _NOT_USED_,
 123         /*
 124          * SDRAM Initialization (offset 5 in UPM RAM)
 125          *
 126          * This is no UPM entry point. The following definition uses
 127          * the remaining space to establish an initialization
 128          * sequence, which is executed by a RUN command.
 129          *
 130          */
 131                     0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
 132         /*
 133          * Burst Read. (Offset 8 in UPM RAM)
 134          */
 135         0x0E2DBC04, 0x10AF7C04, 0xF0AFFC00, 0xF0AFFC00,
 136         0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
 137                                             _NOT_USED_,
 138         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 139         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 140         /*
 141          * Single Write. (Offset 18 in UPM RAM)
 142          */
 143         0x0E29BC04, 0x01B27C04, 0x1FF5FC47, /* last */
 144                                             _NOT_USED_,
 145         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 146         /*
 147          * Burst Write. (Offset 20 in UPM RAM)
 148          */
 149         0x0E29BC04, 0x10A77C00, 0xF0AFFC00, 0xF0AFFC00,
 150         0xE1BAFC04, 0x1FF5FC47, /* last */
 151                                 _NOT_USED_, _NOT_USED_,
 152         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 153         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 154         /*
 155          * Refresh  (Offset 30 in UPM RAM)
 156          */
 157         0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
 158         0xFFFFFC84, 0xFFFFFC07, /* last */
 159                                 _NOT_USED_, _NOT_USED_,
 160         _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 161         /*
 162          * Exception. (Offset 3c in UPM RAM)
 163          */
 164         0x7FFFFC07, /* last */
 165                     0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
 166 #endif
 167 };
 168
 169 /*
 170  * Check Board Identity:
 171  *
 172  */
 173
 174 /***********************************************************************
 175 F* Function:     int checkboard (void) P*A*Z*
 176  *
 177 P* Parameters:   none
 178 P*
 179 P* Returnvalue:  int - 0 is always returned
 180  *
 181 Z* Intention:    This function is the checkboard() method implementation
 182 Z*               for the lwmon board.  Only a standard message is printed.
 183  *
 184 D* Design:       wd@denx.de
 185 C* Coding:       wd@denx.de
 186 V* Verification: dzu@denx.de
 187  ***********************************************************************/
 188 int checkboard (void)
 189 {
 190         puts ("Board: LICCON Konsole LCD3\n");
 191         return (0);
 192 }
 193
 194 /***********************************************************************
 195 F* Function:     phys_size_t initdram (int board_type) P*A*Z*
 196  *
 197 P* Parameters:   int board_type
 198 P*                - Usually type of the board - ignored here.
 199 P*
 200 P* Returnvalue:  long int
 201 P*                - Size of initialized memory
 202  *
 203 Z* Intention:    This function is the initdram() method implementation
 204 Z*               for the lwmon board.
 205 Z*               The memory controller is initialized to access the
 206 Z*               DRAM.
 207  *
 208 D* Design:       wd@denx.de
 209 C* Coding:       wd@denx.de
 210 V* Verification: dzu@denx.de
 211  ***********************************************************************/
 212 phys_size_t initdram (int board_type)
 213 {
 214         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
 215         volatile memctl8xx_t *memctl = &immr->im_memctl;
 216         long int size_b0;
 217         long int size8, size9;
 218         int i;
 219
 220         /*
 221          * Configure UPMA for SDRAM
 222          */
 223         upmconfig (UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
 224
 225         memctl->memc_mptpr = CONFIG_SYS_MPTPR;
 226
 227         /* burst length=4, burst type=sequential, CAS latency=2 */
 228         memctl->memc_mar = CONFIG_SYS_MAR;
 229
 230         /*
 231          * Map controller bank 3 to the SDRAM bank at preliminary address.
 232          */
 233         memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
 234         memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
 235
 236         /* initialize memory address register */
 237         memctl->memc_mamr = CONFIG_SYS_MAMR_8COL;       /* refresh not enabled yet */
 238
 239         /* mode initialization (offset 5) */
 240         udelay (200);                           /* 0x80006105 */
 241         memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x05);
 242
 243         /* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */
 244         udelay (1);                             /* 0x80006130 */
 245         memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
 246         udelay (1);                             /* 0x80006130 */
 247         memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
 248
 249         udelay (1);                             /* 0x80006106 */
 250         memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x06);
 251
 252         memctl->memc_mamr |= MAMR_PTAE; /* refresh enabled */
 253
 254         udelay (200);
 255
 256         /* Need at least 10 DRAM accesses to stabilize */
 257         for (i = 0; i < 10; ++i) {
 258                 volatile unsigned long *addr =
 259                         (volatile unsigned long *) SDRAM_BASE3_PRELIM;
 260                 unsigned long val;
 261
 262                 val = *(addr + i);
 263                 *(addr + i) = val;
 264         }
 265
 266         /*
 267          * Check Bank 0 Memory Size for re-configuration
 268          *
 269          * try 8 column mode
 270          */
 271         size8 = dram_size (CONFIG_SYS_MAMR_8COL, (long *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
 272
 273         udelay (1000);
 274
 275         /*
 276          * try 9 column mode
 277          */
 278         size9 = dram_size (CONFIG_SYS_MAMR_9COL, (long *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
 279
 280         if (size8 < size9) {            /* leave configuration at 9 columns */
 281                 size_b0 = size9;
 282                 memctl->memc_mamr = CONFIG_SYS_MAMR_9COL | MAMR_PTAE;
 283                 udelay (500);
 284         } else {                        /* back to 8 columns            */
 285                 size_b0 = size8;
 286                 memctl->memc_mamr = CONFIG_SYS_MAMR_8COL | MAMR_PTAE;
 287                 udelay (500);
 288         }
 289
 290         /*
 291          * Final mapping:
 292          */
 293
 294         memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) |
 295                         OR_CSNT_SAM | OR_G5LS | SDRAM_TIMING;
 296         memctl->memc_br3 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
 297         udelay (1000);
 298
 299         return (size_b0);
 300 }
 301
 302 /***********************************************************************
 303 F* Function:     static long int dram_size (long int mamr_value,
 304 F*                                          long int *base,
 305 F*                                          long int maxsize) P*A*Z*
 306  *
 307 P* Parameters:   long int mamr_value
 308 P*                - Value for MAMR for the test
 309 P*               long int *base
 310 P*                - Base address for the test
 311 P*               long int maxsize
 312 P*                - Maximum size to test for
 313 P*
 314 P* Returnvalue:  long int
 315 P*                - Size of probed memory
 316  *
 317 Z* Intention:    Check memory range for valid RAM. A simple memory test
 318 Z*               determines the actually available RAM size between
 319 Z*               addresses `base' and `base + maxsize'. Some (not all)
 320 Z*               hardware errors are detected:
 321 Z*                - short between address lines
 322 Z*                - short between data lines
 323  *
 324 D* Design:       wd@denx.de
 325 C* Coding:       wd@denx.de
 326 V* Verification: dzu@denx.de
 327  ***********************************************************************/
 328 static long int dram_size (long int mamr_value, long int *base, long int maxsize)
 329 {
 330         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
 331         volatile memctl8xx_t *memctl = &immr->im_memctl;
 332
 333         memctl->memc_mamr = mamr_value;
 334
 335         return (get_ram_size(base, maxsize));
 336 }
 337
 338 /* ------------------------------------------------------------------------- */
 339
 340 #ifndef PB_ENET_TENA
 341 # define PB_ENET_TENA   ((uint)0x00002000)      /* PB 18 */
 342 #endif
 343
 344 /***********************************************************************
 345 F* Function:     int board_early_init_f (void) P*A*Z*
 346  *
 347 P* Parameters:   none
 348 P*
 349 P* Returnvalue:  int
 350 P*                - 0 is always returned.
 351  *
 352 Z* Intention:    This function is the board_early_init_f() method implementation
 353 Z*               for the lwmon board.
 354 Z*               Disable Ethernet TENA on Port B.
 355  *
 356 D* Design:       wd@denx.de
 357 C* Coding:       wd@denx.de
 358 V* Verification: dzu@denx.de
 359  ***********************************************************************/
 360 int board_early_init_f (void)
 361 {
 362         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
 363
 364         /* Disable Ethernet TENA on Port B
 365          * Necessary because of pull up in COM3 port.
 366          *
 367          * This is just a preliminary fix, intended to turn off TENA
 368          * as soon as possible to avoid noise on the network. Once
 369          * I²C is running we will make sure the interface is
 370          * correctly initialized.
 371          */
 372         immr->im_cpm.cp_pbpar &= ~PB_ENET_TENA;
 373         immr->im_cpm.cp_pbodr &= ~PB_ENET_TENA;
 374         immr->im_cpm.cp_pbdat &= ~PB_ENET_TENA; /* set to 0 = disabled */
 375         immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
 376
 377         return (0);
 378 }
 379
 380 /* ------------------------------------------------------------------------- */
 381
 382 /***********************************************************************
 383 F* Function:     void reset_phy (void) P*A*Z*
 384  *
 385 P* Parameters:   none
 386 P*
 387 P* Returnvalue:  none
 388  *
 389 Z* Intention:    Reset the PHY.  In the lwmon case we do this by the
 390 Z*               signaling the PIC I/O expander.
 391  *
 392 D* Design:       wd@denx.de
 393 C* Coding:       wd@denx.de
 394 V* Verification: dzu@denx.de
 395  ***********************************************************************/
 396 void reset_phy (void)
 397 {
 398         uchar c;
 399
 400 #ifdef DEBUG
 401         printf ("### Switch on Ethernet for SCC2 ###\n");
 402 #endif
 403         c = pic_read (0x61);
 404 #ifdef DEBUG
 405         printf ("Old PIC read: reg_61 = 0x%02x\n", c);
 406 #endif
 407         c |= 0x40;                                      /* disable COM3 */
 408         c &= ~0x80;                                     /* enable Ethernet */
 409         pic_write (0x61, c);
 410 #ifdef DEBUG
 411         c = pic_read (0x61);
 412         printf ("New PIC read: reg_61 = 0x%02x\n", c);
 413 #endif
 414         udelay (1000);
 415 }
 416
 417
 418 /*------------------------- Keyboard controller -----------------------*/
 419 /* command codes */
 420 #define KEYBD_CMD_READ_KEYS     0x01
 421 #define KEYBD_CMD_READ_VERSION  0x02
 422 #define KEYBD_CMD_READ_STATUS   0x03
 423 #define KEYBD_CMD_RESET_ERRORS  0x10
 424
 425 /* status codes */
 426 #define KEYBD_STATUS_MASK       0x3F
 427 #define KEYBD_STATUS_H_RESET    0x20
 428 #define KEYBD_STATUS_BROWNOUT   0x10
 429 #define KEYBD_STATUS_WD_RESET   0x08
 430 #define KEYBD_STATUS_OVERLOAD   0x04
 431 #define KEYBD_STATUS_ILLEGAL_WR 0x02
 432 #define KEYBD_STATUS_ILLEGAL_RD 0x01
 433
 434 /* Number of bytes returned from Keyboard Controller */
 435 #define KEYBD_VERSIONLEN        2       /* version information */
 436 #define KEYBD_DATALEN           9       /* normal key scan data */
 437
 438 /* maximum number of "magic" key codes that can be assigned */
 439
 440 static uchar kbd_addr = CONFIG_SYS_I2C_KEYBD_ADDR;
 441
 442 static uchar *key_match (uchar *);
 443
 444 #define KEYBD_SET_DEBUGMODE     '#'     /* Magic key to enable debug output */
 445
 446 /***********************************************************************
 447 F* Function:     int board_postclk_init (void) P*A*Z*
 448  *
 449 P* Parameters:   none
 450 P*
 451 P* Returnvalue:  int
 452 P*                - 0 is always returned.
 453  *
 454 Z* Intention:    This function is the board_postclk_init() method implementation
 455 Z*               for the lwmon board.
 456  *
 457  ***********************************************************************/
 458 int board_postclk_init (void)
 459 {
 460         kbd_init();
 461
 462 #ifdef CONFIG_MODEM_SUPPORT
 463         if (key_pressed()) {
 464                 disable_putc(); /* modem doesn't understand banner etc */
 465                 gd->do_mdm_init = 1;
 466         }
 467 #endif
 468
 469         return (0);
 470 }
 471
 472 struct serial_device * default_serial_console (void)
 473 {
 474         return gd->do_mdm_init ? &serial_scc_device : &serial_smc_device;
 475 }
 476
 477 static void kbd_init (void)
 478 {
 479         uchar kbd_data[KEYBD_DATALEN];
 480         uchar tmp_data[KEYBD_DATALEN];
 481         uchar val, errcd;
 482         int i;
 483
 484         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 485
 486         gd->kbd_status = 0;
 487
 488         /* Forced by PIC. Delays <= 175us loose */
 489         udelay(1000);
 490
 491         /* Read initial keyboard error code */
 492         val = KEYBD_CMD_READ_STATUS;
 493         i2c_write (kbd_addr, 0, 0, &val, 1);
 494         i2c_read (kbd_addr, 0, 0, &errcd, 1);
 495         /* clear unused bits */
 496         errcd &= KEYBD_STATUS_MASK;
 497         /* clear "irrelevant" bits. Recommended by Martin Rajek, LWN */
 498         errcd &= ~(KEYBD_STATUS_H_RESET|KEYBD_STATUS_BROWNOUT);
 499         if (errcd) {
 500                 gd->kbd_status |= errcd << 8;
 501         }
 502         /* Reset error code and verify */
 503         val = KEYBD_CMD_RESET_ERRORS;
 504         i2c_write (kbd_addr, 0, 0, &val, 1);
 505         udelay(1000);   /* delay NEEDED by keyboard PIC !!! */
 506
 507         val = KEYBD_CMD_READ_STATUS;
 508         i2c_write (kbd_addr, 0, 0, &val, 1);
 509         i2c_read (kbd_addr, 0, 0, &val, 1);
 510
 511         val &= KEYBD_STATUS_MASK;       /* clear unused bits */
 512         if (val) {                      /* permanent error, report it */
 513                 gd->kbd_status |= val;
 514                 return;
 515         }
 516
 517         /*
 518          * Read current keyboard state.
 519          *
 520          * After the error reset it may take some time before the
 521          * keyboard PIC picks up a valid keyboard scan - the total
 522          * scan time is approx. 1.6 ms (information by Martin Rajek,
 523          * 28 Sep 2002). We read a couple of times for the keyboard
 524          * to stabilize, using a big enough delay.
 525          * 10 times should be enough. If the data is still changing,
 526          * we use what we get :-(
 527          */
 528
 529         memset (tmp_data, 0xFF, KEYBD_DATALEN); /* impossible value */
 530         for (i=0; i<10; ++i) {
 531                 val = KEYBD_CMD_READ_KEYS;
 532                 i2c_write (kbd_addr, 0, 0, &val, 1);
 533                 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
 534
 535                 if (memcmp(kbd_data, tmp_data, KEYBD_DATALEN) == 0) {
 536                         /* consistent state, done */
 537                         break;
 538                 }
 539                 /* remeber last state, delay, and retry */
 540                 memcpy (tmp_data, kbd_data, KEYBD_DATALEN);
 541                 udelay (5000);
 542         }
 543 }
 544
 545 /***********************************************************************
 546 F* Function:     int misc_init_r (void) P*A*Z*
 547  *
 548 P* Parameters:   none
 549 P*
 550 P* Returnvalue:  int
 551 P*                - 0 is always returned, even in the case of a keyboard
 552 P*                    error.
 553  *
 554 Z* Intention:    This function is the misc_init_r() method implementation
 555 Z*               for the lwmon board.
 556 Z*               The keyboard controller is initialized and the result
 557 Z*               of a read copied to the environment variable "keybd".
 558 Z*               If KEYBD_SET_DEBUGMODE is defined, a check is made for
 559 Z*               this key, and if found display to the LCD will be enabled.
 560 Z*               The keys in "keybd" are checked against the magic
 561 Z*               keycommands defined in the environment.
 562 Z*               See also key_match().
 563  *
 564 D* Design:       wd@denx.de
 565 C* Coding:       wd@denx.de
 566 V* Verification: dzu@denx.de
 567  ***********************************************************************/
 568 int misc_init_r (void)
 569 {
 570         uchar kbd_data[KEYBD_DATALEN];
 571         char keybd_env[2 * KEYBD_DATALEN + 1];
 572         uchar kbd_init_status = gd->kbd_status >> 8;
 573         uchar kbd_status = gd->kbd_status;
 574         uchar val;
 575         char *str;
 576         int i;
 577
 578         if (kbd_init_status) {
 579                 printf ("KEYBD: Error %02X\n", kbd_init_status);
 580         }
 581         if (kbd_status) {               /* permanent error, report it */
 582                 printf ("*** Keyboard error code %02X ***\n", kbd_status);
 583                 sprintf (keybd_env, "%02X", kbd_status);
 584                 setenv ("keybd", keybd_env);
 585                 return 0;
 586         }
 587
 588         /*
 589          * Now we know that we have a working  keyboard,  so  disable
 590          * all output to the LCD except when a key press is detected.
 591          */
 592
 593         if ((console_assign (stdout, "serial") < 0) ||
 594                 (console_assign (stderr, "serial") < 0)) {
 595                 printf ("Can't assign serial port as output device\n");
 596         }
 597
 598         /* Read Version */
 599         val = KEYBD_CMD_READ_VERSION;
 600         i2c_write (kbd_addr, 0, 0, &val, 1);
 601         i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_VERSIONLEN);
 602         printf ("KEYBD: Version %d.%d\n", kbd_data[0], kbd_data[1]);
 603
 604         /* Read current keyboard state */
 605         val = KEYBD_CMD_READ_KEYS;
 606         i2c_write (kbd_addr, 0, 0, &val, 1);
 607         i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
 608
 609         for (i = 0; i < KEYBD_DATALEN; ++i) {
 610                 sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
 611         }
 612         setenv ("keybd", keybd_env);
 613
 614         str = strdup ((char *)key_match (kbd_data));    /* decode keys */
 615 #ifdef KEYBD_SET_DEBUGMODE
 616         if (kbd_data[0] == KEYBD_SET_DEBUGMODE) {       /* set debug mode */
 617                 if ((console_assign (stdout, "lcd") < 0) ||
 618                         (console_assign (stderr, "lcd") < 0)) {
 619                         printf ("Can't assign LCD display as output device\n");
 620                 }
 621         }
 622 #endif /* KEYBD_SET_DEBUGMODE */
 623 #ifdef CONFIG_PREBOOT   /* automatically configure "preboot" command on key match */
 624         setenv ("preboot", str);        /* set or delete definition */
 625 #endif /* CONFIG_PREBOOT */
 626         if (str != NULL) {
 627                 free (str);
 628         }
 629         return (0);
 630 }
 631
 632 #ifdef CONFIG_PREBOOT
 633
 634 static uchar kbd_magic_prefix[] = "key_magic";
 635 static uchar kbd_command_prefix[] = "key_cmd";
 636
 637 static int compare_magic (uchar *kbd_data, uchar *str)
 638 {
 639         uchar compare[KEYBD_DATALEN-1];
 640         char *nxt;
 641         int i;
 642
 643         /* Don't include modifier byte */
 644         memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
 645
 646         for (; str != NULL; str = (*nxt) ? (uchar *)(nxt+1) : (uchar *)nxt) {
 647                 uchar c;
 648                 int k;
 649
 650                 c = (uchar) simple_strtoul ((char *)str, (char **) (&nxt), 16);
 651
 652                 if (str == (uchar *)nxt) {      /* invalid character */
 653                         break;
 654                 }
 655
 656                 /*
 657                  * Check if this key matches the input.
 658                  * Set matches to zero, so they match only once
 659                  * and we can find duplicates or extra keys
 660                  */
 661                 for (k = 0; k < sizeof(compare); ++k) {
 662                         if (compare[k] == '\0') /* only non-zero entries */
 663                                 continue;
 664                         if (c == compare[k]) {  /* found matching key */
 665                                 compare[k] = '\0';
 666                                 break;
 667                         }
 668                 }
 669                 if (k == sizeof(compare)) {
 670                         return -1;              /* unmatched key */
 671                 }
 672         }
 673
 674         /*
 675          * A full match leaves no keys in the `compare' array,
 676          */
 677         for (i = 0; i < sizeof(compare); ++i) {
 678                 if (compare[i])
 679                 {
 680                         return -1;
 681                 }
 682         }
 683
 684         return 0;
 685 }
 686
 687 /***********************************************************************
 688 F* Function:     static uchar *key_match (uchar *kbd_data) P*A*Z*
 689  *
 690 P* Parameters:   uchar *kbd_data
 691 P*                - The keys to match against our magic definitions
 692 P*
 693 P* Returnvalue:  uchar *
 694 P*                - != NULL: Pointer to the corresponding command(s)
 695 P*                     NULL: No magic is about to happen
 696  *
 697 Z* Intention:    Check if pressed key(s) match magic sequence,
 698 Z*               and return the command string associated with that key(s).
 699 Z*
 700 Z*               If no key press was decoded, NULL is returned.
 701 Z*
 702 Z*               Note: the first character of the argument will be
 703 Z*                     overwritten with the "magic charcter code" of the
 704 Z*                     decoded key(s), or '\0'.
 705 Z*
 706 Z*               Note: the string points to static environment data
 707 Z*                     and must be saved before you call any function that
 708 Z*                     modifies the environment.
 709  *
 710 D* Design:       wd@denx.de
 711 C* Coding:       wd@denx.de
 712 V* Verification: dzu@denx.de
 713  ***********************************************************************/
 714 static uchar *key_match (uchar *kbd_data)
 715 {
 716         char magic[sizeof (kbd_magic_prefix) + 1];
 717         uchar *suffix;
 718         char *kbd_magic_keys;
 719
 720         /*
 721          * The following string defines the characters that can pe appended
 722          * to "key_magic" to form the names of environment variables that
 723          * hold "magic" key codes, i. e. such key codes that can cause
 724          * pre-boot actions. If the string is empty (""), then only
 725          * "key_magic" is checked (old behaviour); the string "125" causes
 726          * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
 727          */
 728         if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
 729                 kbd_magic_keys = "";
 730
 731         /* loop over all magic keys;
 732          * use '\0' suffix in case of empty string
 733          */
 734         for (suffix=(uchar *)kbd_magic_keys; *suffix || suffix==(uchar *)kbd_magic_keys; ++suffix) {
 735                 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
 736 #if 0
 737                 printf ("### Check magic \"%s\"\n", magic);
 738 #endif
 739                 if (compare_magic(kbd_data, (uchar *)getenv(magic)) == 0) {
 740                         char cmd_name[sizeof (kbd_command_prefix) + 1];
 741                         char *cmd;
 742
 743                         sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
 744
 745                         cmd = getenv (cmd_name);
 746 #if 0
 747                         printf ("### Set PREBOOT to $(%s): \"%s\"\n",
 748                                         cmd_name, cmd ? cmd : "<<NULL>>");
 749 #endif
 750                         *kbd_data = *suffix;
 751                         return ((uchar *)cmd);
 752                 }
 753         }
 754 #if 0
 755         printf ("### Delete PREBOOT\n");
 756 #endif
 757         *kbd_data = '\0';
 758         return (NULL);
 759 }
 760 #endif /* CONFIG_PREBOOT */
 761
 762 /*---------------Board Special Commands: PIC read/write ---------------*/
 763
 764 #if defined(CONFIG_CMD_BSP)
 765 /***********************************************************************
 766 F* Function:     int do_pic (cmd_tbl_t *cmdtp, int flag,
 767 F*                           int argc, char *argv[]) P*A*Z*
 768  *
 769 P* Parameters:   cmd_tbl_t *cmdtp
 770 P*                - Pointer to our command table entry
 771 P*               int flag
 772 P*                - If the CMD_FLAG_REPEAT bit is set, then this call is
 773 P*                  a repetition
 774 P*               int argc
 775 P*                - Argument count
 776 P*               char *argv[]
 777 P*                - Array of the actual arguments
 778 P*
 779 P* Returnvalue:  int
 780 P*                - 0  The command was handled successfully
 781 P*                  1  An error occurred
 782  *
 783 Z* Intention:    Implement the "pic [read|write]" commands.
 784 Z*               The read subcommand takes one argument, the register,
 785 Z*               whereas the write command takes two, the register and
 786 Z*               the new value.
 787  *
 788 D* Design:       wd@denx.de
 789 C* Coding:       wd@denx.de
 790 V* Verification: dzu@denx.de
 791  ***********************************************************************/
 792 int do_pic (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 793 {
 794         uchar reg, val;
 795
 796         switch (argc) {
 797         case 3:                                 /* PIC read reg */
 798                 if (strcmp (argv[1], "read") != 0)
 799                         break;
 800
 801                 reg = simple_strtoul (argv[2], NULL, 16);
 802
 803                 printf ("PIC read: reg %02x: %02x\n\n", reg, pic_read (reg));
 804
 805                 return 0;
 806         case 4:                                 /* PIC write reg val */
 807                 if (strcmp (argv[1], "write") != 0)
 808                         break;
 809
 810                 reg = simple_strtoul (argv[2], NULL, 16);
 811                 val = simple_strtoul (argv[3], NULL, 16);
 812
 813                 printf ("PIC write: reg %02x val 0x%02x: %02x => ",
 814                                 reg, val, pic_read (reg));
 815                 pic_write (reg, val);
 816                 printf ("%02x\n\n", pic_read (reg));
 817                 return 0;
 818         default:
 819                 break;
 820         }
 821         printf ("Usage:\n%s\n", cmdtp->usage);
 822         return 1;
 823 }
 824 U_BOOT_CMD(
 825         pic,    4,      1,      do_pic,
 826         "pic     - read and write PIC registers\n",
 827         "read  reg      - read PIC register `reg'\n"
 828         "pic write reg val  - write value `val' to PIC register `reg'\n"
 829 );
 830
 831 /***********************************************************************
 832 F* Function:     int do_kbd (cmd_tbl_t *cmdtp, int flag,
 833 F*                           int argc, char *argv[]) P*A*Z*
 834  *
 835 P* Parameters:   cmd_tbl_t *cmdtp
 836 P*                - Pointer to our command table entry
 837 P*               int flag
 838 P*                - If the CMD_FLAG_REPEAT bit is set, then this call is
 839 P*                  a repetition
 840 P*               int argc
 841 P*                - Argument count
 842 P*               char *argv[]
 843 P*                - Array of the actual arguments
 844 P*
 845 P* Returnvalue:  int
 846 P*                - 0 is always returned.
 847  *
 848 Z* Intention:    Implement the "kbd" command.
 849 Z*               The keyboard status is read.  The result is printed on
 850 Z*               the console and written into the "keybd" environment
 851 Z*               variable.
 852  *
 853 D* Design:       wd@denx.de
 854 C* Coding:       wd@denx.de
 855 V* Verification: dzu@denx.de
 856  ***********************************************************************/
 857 int do_kbd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 858 {
 859         uchar kbd_data[KEYBD_DATALEN];
 860         char keybd_env[2 * KEYBD_DATALEN + 1];
 861         uchar val;
 862         int i;
 863
 864 #if 0 /* Done in kbd_init */
 865         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 866 #endif
 867
 868         /* Read keys */
 869         val = KEYBD_CMD_READ_KEYS;
 870         i2c_write (kbd_addr, 0, 0, &val, 1);
 871         i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
 872
 873         puts ("Keys:");
 874         for (i = 0; i < KEYBD_DATALEN; ++i) {
 875                 sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
 876                 printf (" %02x", kbd_data[i]);
 877         }
 878         putc ('\n');
 879         setenv ("keybd", keybd_env);
 880         return 0;
 881 }
 882
 883 U_BOOT_CMD(
 884         kbd,    1,      1,      do_kbd,
 885         "kbd     - read keyboard status\n",
 886         NULL
 887 );
 888
 889 /* Read and set LSB switch */
 890 #define CONFIG_SYS_PC_TXD1_ENA          0x0008          /* PC.12 */
 891
 892 /***********************************************************************
 893 F* Function:     int do_lsb (cmd_tbl_t *cmdtp, int flag,
 894 F*                           int argc, char *argv[]) P*A*Z*
 895  *
 896 P* Parameters:   cmd_tbl_t *cmdtp
 897 P*                - Pointer to our command table entry
 898 P*               int flag
 899 P*                - If the CMD_FLAG_REPEAT bit is set, then this call is
 900 P*                  a repetition
 901 P*               int argc
 902 P*                - Argument count
 903 P*               char *argv[]
 904 P*                - Array of the actual arguments
 905 P*
 906 P* Returnvalue:  int
 907 P*                - 0  The command was handled successfully
 908 P*                  1  An error occurred
 909  *
 910 Z* Intention:    Implement the "lsb [on|off]" commands.
 911 Z*               The lsb is switched according to the first parameter by
 912 Z*               by signaling the PIC I/O expander.
 913 Z*               Called with no arguments, the current setting is
 914 Z*               printed.
 915  *
 916 D* Design:       wd@denx.de
 917 C* Coding:       wd@denx.de
 918 V* Verification: dzu@denx.de
 919  ***********************************************************************/
 920 int do_lsb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 921 {
 922         uchar val;
 923         immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
 924
 925         switch (argc) {
 926         case 1:                                 /* lsb - print setting */
 927                 val = pic_read (0x60);
 928                 printf ("LSB is o%s\n", (val & 0x20) ? "n" : "ff");
 929                 return 0;
 930         case 2:                                 /* lsb on or lsb off - set switch */
 931                 val = pic_read (0x60);
 932
 933                 if (strcmp (argv[1], "on") == 0) {
 934                         val |= 0x20;
 935                         immr->im_ioport.iop_pcpar &= ~(CONFIG_SYS_PC_TXD1_ENA);
 936                         immr->im_ioport.iop_pcdat |= CONFIG_SYS_PC_TXD1_ENA;
 937                         immr->im_ioport.iop_pcdir |= CONFIG_SYS_PC_TXD1_ENA;
 938                 } else if (strcmp (argv[1], "off") == 0) {
 939                         val &= ~0x20;
 940                         immr->im_ioport.iop_pcpar &= ~(CONFIG_SYS_PC_TXD1_ENA);
 941                         immr->im_ioport.iop_pcdat &= ~(CONFIG_SYS_PC_TXD1_ENA);
 942                         immr->im_ioport.iop_pcdir |= CONFIG_SYS_PC_TXD1_ENA;
 943                 } else {
 944                         break;
 945                 }
 946                 pic_write (0x60, val);
 947                 return 0;
 948         default:
 949                 break;
 950         }
 951         printf ("Usage:\n%s\n", cmdtp->usage);
 952         return 1;
 953 }
 954
 955 U_BOOT_CMD(
 956         lsb,    2,      1,      do_lsb,
 957         "lsb     - check and set LSB switch\n",
 958         "on  - switch LSB on\n"
 959         "lsb off - switch LSB off\n"
 960         "lsb     - print current setting\n"
 961 );
 962
 963 #endif
 964
 965 /*----------------------------- Utilities -----------------------------*/
 966 /***********************************************************************
 967 F* Function:     uchar pic_read (uchar reg) P*A*Z*
 968  *
 969 P* Parameters:   uchar reg
 970 P*                - Register to read
 971 P*
 972 P* Returnvalue:  uchar
 973 P*                - Value read from register
 974  *
 975 Z* Intention:    Read a register from the PIC I/O expander.
 976  *
 977 D* Design:       wd@denx.de
 978 C* Coding:       wd@denx.de
 979 V* Verification: dzu@denx.de
 980  ***********************************************************************/
 981 uchar pic_read (uchar reg)
 982 {
 983         return (i2c_reg_read (CONFIG_SYS_I2C_PICIO_ADDR, reg));
 984 }
 985
 986 /***********************************************************************
 987 F* Function:     void pic_write (uchar reg, uchar val) P*A*Z*
 988  *
 989 P* Parameters:   uchar reg
 990 P*                - Register to read
 991 P*               uchar val
 992 P*                - Value to write
 993 P*
 994 P* Returnvalue:  none
 995  *
 996 Z* Intention:    Write to a register on the PIC I/O expander.
 997  *
 998 D* Design:       wd@denx.de
 999 C* Coding:       wd@denx.de
1000 V* Verification: dzu@denx.de
1001  ***********************************************************************/
1002 void pic_write (uchar reg, uchar val)
1003 {
1004         i2c_reg_write (CONFIG_SYS_I2C_PICIO_ADDR, reg, val);
1005 }
1006
1007 /*---------------------- Board Control Functions ----------------------*/
1008 /***********************************************************************
1009 F* Function:     void board_poweroff (void) P*A*Z*
1010  *
1011 P* Parameters:   none
1012 P*
1013 P* Returnvalue:  none
1014  *
1015 Z* Intention:    Turn off the battery power and loop endless, so this
1016 Z*               should better be the last function you call...
1017  *
1018 D* Design:       wd@denx.de
1019 C* Coding:       wd@denx.de
1020 V* Verification: dzu@denx.de
1021  ***********************************************************************/
1022 void board_poweroff (void)
1023 {
1024     /* Turn battery off */
1025     ((volatile immap_t *)CONFIG_SYS_IMMR)->im_ioport.iop_pcdat &= ~(1 << (31 - 13));
1026
1027     while (1);
1028 }
1029
1030 #ifdef CONFIG_MODEM_SUPPORT
1031 static int key_pressed(void)
1032 {
1033         uchar kbd_data[KEYBD_DATALEN];
1034         uchar val;
1035
1036         /* Read keys */
1037         val = KEYBD_CMD_READ_KEYS;
1038         i2c_write (kbd_addr, 0, 0, &val, 1);
1039         i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
1040
1041         return (compare_magic(kbd_data, (uchar *)CONFIG_MODEM_KEY_MAGIC) == 0);
1042 }
1043 #endif  /* CONFIG_MODEM_SUPPORT */
1044
1045 #ifdef CONFIG_POST
1046 /*
1047  * Returns 1 if keys pressed to start the power-on long-running tests
1048  * Called from board_init_f().
1049  */
1050 int post_hotkeys_pressed(void)
1051 {
1052         uchar kbd_data[KEYBD_DATALEN];
1053         uchar val;
1054
1055         /* Read keys */
1056         val = KEYBD_CMD_READ_KEYS;
1057         i2c_write (kbd_addr, 0, 0, &val, 1);
1058         i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
1059
1060         return (compare_magic(kbd_data, (uchar *)CONFIG_POST_KEY_MAGIC) == 0);
1061 }
1062 #endif