LXR uboot/board/kup/kup4k/kup4k.c

   1/*
   2 * (C) Copyright 2000-2004
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 * Klaus Heydeck, Kieback & Peter GmbH & Co KG, heydeck@kieback-peter.de
   5 *
   6 * See file CREDITS for list of people who contributed to this
   7 * project.
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License as
  11 * published by the Free Software Foundation; either version 2 of
  12 * the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22 * MA 02111-1307 USA
  23 */
  24
  25#include <common.h>
  26#include <command.h>
  27#include <libfdt.h>
  28#include <mpc8xx.h>
  29#include <hwconfig.h>
  30#include <i2c.h>
  31#include "../common/kup.h"
  32#include <asm/io.h>
  33
  34static unsigned char swapbyte(unsigned char c);
  35static int read_diag(void);
  36
  37DECLARE_GLOBAL_DATA_PTR;
  38
  39/* ----------------------------------------------------------------------- */
  40
  41#define _NOT_USED_      0xFFFFFFFF
  42
  43const uint sdram_table[] = {
  44        /*
  45         * Single Read. (Offset 0 in UPMA RAM)
  46         */
  47        0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00,
  48        0x1FF77C47,             /* last */
  49
  50        /*
  51         * SDRAM Initialization (offset 5 in UPMA RAM)
  52         *
  53         * This is no UPM entry point. The following definition uses
  54         * the remaining space to establish an initialization
  55         * sequence, which is executed by a RUN command.
  56         *
  57         */
  58        0x1FF77C35, 0xEFEABC34, 0x1FB57C35,     /* last */
  59
  60        /*
  61         * Burst Read. (Offset 8 in UPMA RAM)
  62         */
  63        0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00,
  64        0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */
  65        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  66        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  67
  68        /*
  69         * Single Write. (Offset 18 in UPMA RAM)
  70         */
  71        0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */
  72        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  73
  74        /*
  75         * Burst Write. (Offset 20 in UPMA RAM)
  76         */
  77        0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00,
  78        0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47,     /* last */
  79        _NOT_USED_,
  80        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  81        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  82
  83        /*
  84         * Refresh  (Offset 30 in UPMA RAM)
  85         */
  86        0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
  87        0xFFFFFC84, 0xFFFFFC07, /* last */
  88        _NOT_USED_, _NOT_USED_,
  89        _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
  90
  91        /*
  92         * Exception. (Offset 3c in UPMA RAM)
  93         */
  94        0x7FFFFC07,             /* last */
  95        _NOT_USED_, _NOT_USED_, _NOT_USED_,
  96};
  97
  98/* ----------------------------------------------------------------------- */
  99
 100/*
 101 * Check Board Identity:
 102 */
 103
 104int checkboard(void)
 105{
 106        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 107        uchar rev,mod,tmp,pcf,ak_rev,ak_mod;
 108
 109        /*
 110         * Init ChipSelect #4 (CAN + HW-Latch)
 111         */
 112        out_be32(&immap->im_memctl.memc_or4, CONFIG_SYS_OR4);
 113        out_be32(&immap->im_memctl.memc_br4, CONFIG_SYS_BR4);
 114
 115        /*
 116         * Init ChipSelect #5 (S1D13768)
 117         */
 118        out_be32(&immap->im_memctl.memc_or5, CONFIG_SYS_OR5);
 119        out_be32(&immap->im_memctl.memc_br5, CONFIG_SYS_BR5);
 120
 121        tmp = swapbyte(in_8((unsigned char*) LATCH_ADDR));
 122        rev = (tmp & 0xF8) >> 3;
 123        mod = (tmp & 0x07);
 124
 125        i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 126
 127        if (read_diag())
 128                gd->flags &= ~GD_FLG_SILENT;
 129
 130        printf("Board: KUP4K Rev %d.%d AK:",rev,mod);
 131        /*
 132         * TI Application report: Before using the IO as an input,
 133         * a high must be written to the IO first
 134         */
 135        pcf = 0xFF;
 136        i2c_write(0x21, 0, 0 , &pcf, 1);
 137        if (i2c_read(0x21, 0, 0, &pcf, 1)) {
 138                puts("n/a\n");
 139        } else {
 140                ak_rev = (pcf & 0xF8) >> 3;
 141                ak_mod = (pcf & 0x07);
 142                printf("%d.%d\n", ak_rev, ak_mod);
 143        }
 144        return 0;
 145}
 146
 147/* ----------------------------------------------------------------------- */
 148
 149
 150phys_size_t initdram(int board_type)
 151{
 152        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 153        volatile memctl8xx_t *memctl = &immap->im_memctl;
 154        long int size = 0;
 155        uchar *latch, rev, tmp;
 156
 157        /*
 158         * Init ChipSelect #4 (CAN + HW-Latch) to determine Hardware Revision
 159         * Rev 1..6 -> 48 MB RAM;   Rev >= 7 -> 96 MB
 160         */
 161        out_be32(&immap->im_memctl.memc_or4, CONFIG_SYS_OR4);
 162        out_be32(&immap->im_memctl.memc_br4, CONFIG_SYS_BR4);
 163
 164        latch = (uchar *)0x90000200;
 165        tmp = swapbyte(*latch);
 166        rev = (tmp & 0xF8) >> 3;
 167
 168        upmconfig(UPMA, (uint *) sdram_table,
 169                   sizeof (sdram_table) / sizeof (uint));
 170
 171        out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);
 172
 173        out_be32(&memctl->memc_mar, 0x00000088);
 174        /* no refresh yet */
 175        if(rev >= 7) {
 176                out_be32(&memctl->memc_mamr,
 177                                 CONFIG_SYS_MAMR_9COL & (~(MAMR_PTAE)));
 178        } else {
 179                out_be32(&memctl->memc_mamr,
 180                                 CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)));
 181        }
 182
 183        udelay(200);
 184
 185        /* perform SDRAM initializsation sequence */
 186
 187        /* SDRAM bank 0 */
 188        out_be32(&memctl->memc_mcr, 0x80002105);
 189        udelay(1);
 190        out_be32(&memctl->memc_mcr, 0x80002830); /* execute twice */
 191        udelay(1);
 192        out_be32(&memctl->memc_mcr, 0x80002106); /* RUN MRS Pattern from loc 6 */
 193        udelay(1);
 194
 195        /* SDRAM bank 1 */
 196        out_be32(&memctl->memc_mcr, 0x80004105);
 197        udelay(1);
 198        out_be32(&memctl->memc_mcr, 0x80004830); /* execute twice */
 199        udelay(1);
 200        out_be32(&memctl->memc_mcr, 0x80004106); /* RUN MRS Pattern from loc 6 */
 201        udelay(1);
 202
 203        /* SDRAM bank 2 */
 204        out_be32(&memctl->memc_mcr, 0x80006105);
 205        udelay(1);
 206        out_be32(&memctl->memc_mcr, 0x80006830); /* execute twice */
 207        udelay(1);
 208        out_be32(&memctl->memc_mcr, 0x80006106); /* RUN MRS Pattern from loc 6 */
 209        udelay(1);
 210
 211        setbits_be32(&memctl->memc_mamr, MAMR_PTAE); /* enable refresh */
 212        udelay(1000);
 213
 214        out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);
 215        udelay(1000);
 216        if(rev >= 7) {
 217                size = 32 * 3 * 1024 * 1024;
 218                out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_9COL);
 219                out_be32(&memctl->memc_br1, CONFIG_SYS_BR1_9COL);
 220                out_be32(&memctl->memc_or2, CONFIG_SYS_OR2_9COL);
 221                out_be32(&memctl->memc_br2, CONFIG_SYS_BR2_9COL);
 222                out_be32(&memctl->memc_or3, CONFIG_SYS_OR3_9COL);
 223                out_be32(&memctl->memc_br3, CONFIG_SYS_BR3_9COL);
 224        } else {
 225                size = 16 * 3 * 1024 * 1024;
 226                out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_8COL);
 227                out_be32(&memctl->memc_br1, CONFIG_SYS_BR1_8COL);
 228                out_be32(&memctl->memc_or2, CONFIG_SYS_OR2_8COL);
 229                out_be32(&memctl->memc_br2, CONFIG_SYS_BR2_8COL);
 230                out_be32(&memctl->memc_or3, CONFIG_SYS_OR3_8COL);
 231                out_be32(&memctl->memc_br3, CONFIG_SYS_BR3_8COL);
 232        }
 233        return (size);
 234}
 235
 236/* ----------------------------------------------------------------------- */
 237
 238
 239int misc_init_r(void)
 240{
 241        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 242
 243#ifdef CONFIG_IDE_LED
 244        /* Configure PA8 as output port */
 245        setbits_be16(&immap->im_ioport.iop_padir, PA_8);
 246        setbits_be16(&immap->im_ioport.iop_paodr, PA_8);
 247        clrbits_be16(&immap->im_ioport.iop_papar, PA_8);
 248        setbits_be16(&immap->im_ioport.iop_padat, PA_8); /* turn it off */
 249#endif
 250        load_sernum_ethaddr();
 251        setenv("hw","4k");
 252        poweron_key();
 253        return (0);
 254}
 255
 256
 257static int read_diag(void)
 258{
 259        int diag;
 260        immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
 261
 262        clrbits_be16(&immr->im_ioport.iop_pcdir, PC_4); /* input */
 263        clrbits_be16(&immr->im_ioport.iop_pcpar, PC_4); /* gpio */
 264        setbits_be16(&immr->im_ioport.iop_pcdir, PC_5); /* output */
 265        clrbits_be16(&immr->im_ioport.iop_pcpar, PC_4); /* gpio */
 266        setbits_be16(&immr->im_ioport.iop_pcdat, PC_5); /* 1 */
 267        udelay(500);
 268        if (in_be16(&immr->im_ioport.iop_pcdat) & PC_4) {
 269                clrbits_be16(&immr->im_ioport.iop_pcdat, PC_5);/* 0 */
 270                udelay(500);
 271                if(in_be16(&immr->im_ioport.iop_pcdat) & PC_4)
 272                        diag = 0;
 273                else
 274                        diag = 1;
 275        } else {
 276                diag = 0;
 277        }
 278        clrbits_be16(&immr->im_ioport.iop_pcdir, PC_5); /* input */
 279        return (diag);
 280}
 281
 282static unsigned char swapbyte(unsigned char c)
 283{
 284        unsigned char result = 0;
 285        int i = 0;
 286
 287        for(i = 0; i < 8; ++i) {
 288                result = result << 1;
 289                result |= (c & 1);
 290                c = c >> 1;
 291        }
 292        return result;
 293}
 294
 295/*
 296 * Device Tree Support
 297 */
 298#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
 299void ft_board_setup(void *blob, bd_t *bd)
 300{
 301        ft_cpu_setup(blob, bd);
 302}
 303#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */
 304