board/gen860t/gen860t.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  * Keith Outwater, keith_outwater@mvis.com
   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 <virtex2.h>
  26 #include <common.h>
  27 #include <mpc8xx.h>
  28 #include <asm/8xx_immap.h>
  29 #include "beeper.h"
  30 #include "fpga.h"
  31 #include "ioport.h"
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 #ifdef CONFIG_STATUS_LED
  36 #include <status_led.h>
  37 #endif
  38
  39 #if defined(CFG_CMD_MII) && defined(CONFIG_MII)
  40 #include <net.h>
  41 #endif
  42
  43 #if 0
  44 #define GEN860T_DEBUG
  45 #endif
  46
  47 #ifdef GEN860T_DEBUG
  48 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  49 #else
  50 #define PRINTF(fmt,args...)
  51 #endif
  52
  53 /*
  54  * The following UPM init tables were generated automatically by
  55  * Motorola's MCUINIT program. See the README file for UPM to
  56  * SDRAM pin assignments if you want to type this data into
  57  * MCUINIT in order to reverse engineer the waveforms.
  58  */
  59
  60 /*
  61  * UPM initialization tables for MICRON MT48LC16M16A2TG SDRAM devices
  62  * (UPMA) and Virtex FPGA SelectMap interface (UPMB).
  63  * NOTE that unused areas of the table are used to hold NOP, precharge
  64  * and mode register set sequences.
  65  *
  66  */
  67 #define UPMA_NOP_ADDR                   0x5
  68 #define UPMA_PRECHARGE_ADDR             0x6
  69 #define UPMA_MRS_ADDR                   0x12
  70
  71 #define UPM_SINGLE_READ_ADDR    0x00
  72 #define UPM_BURST_READ_ADDR             0x08
  73 #define UPM_SINGLE_WRITE_ADDR   0x18
  74 #define UPM_BURST_WRITE_ADDR    0x20
  75 #define UPM_REFRESH_ADDR                0x30
  76
  77 const uint sdram_upm_table[] = {
  78         /* single read   (offset 0x00 in upm ram) */
  79         0x0e0fdc04, 0x01adfc04, 0x0fbffc00, 0x1fff5c05,
  80         0xffffffff, 0x0fffffcd, 0x0fff0fce, 0xefcfffff,
  81         /* burst read    (offset 0x08 in upm ram) */
  82         0x0f0fdc04, 0x00fdfc04, 0xf0fffc00, 0xf0fffc00,
  83         0xf1fffc00, 0xfffffc00, 0xfffffc05, 0xffffffff,
  84         0xffffffff, 0xffffffff, 0x0ffffff4, 0x1f3d5ff4,
  85         0xfffffff4, 0xfffffff5, 0xffffffff, 0xffffffff,
  86         /* single write  (offset 0x18 in upm ram) */
  87         0x0f0fdc04, 0x00ad3c00, 0x1fff5c05, 0xffffffff,
  88         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
  89         /* burst write   (offset 0x20 in upm ram) */
  90         0x0f0fdc00, 0x10fd7c00, 0xf0fffc00, 0xf0fffc00,
  91         0xf1fffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
  92         0xffffffff, 0xffffffff, 0xffffffff, 0xfffff7ff,
  93         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
  94         /* refresh       (offset 0x30 in upm ram) */
  95         0x1ffddc84, 0xfffffc04, 0xfffffc04, 0xfffffc84,
  96         0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
  97         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
  98         /* exception     (offset 0x3C in upm ram) */
  99 };
 100
 101 const uint selectmap_upm_table[] = {
 102         /* single read   (offset 0x00 in upm ram) */
 103         0x88fffc06, 0x00fff404, 0x00fffc04, 0x33fffc00,
 104         0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
 105         /* burst read    (offset 0x08 in upm ram) */
 106         0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
 107         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 108         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 109         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 110         /* single write  (offset 0x18 in upm ram) */
 111         0x88fffc04, 0x00fff400, 0x77fffc05, 0xffffffff,
 112         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 113         /* burst write   (offset 0x20 in upm ram) */
 114         0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
 115         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 116         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 117         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 118         /* refresh       (offset 0x30 in upm ram) */
 119         0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
 120         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 121         0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 122         /* exception     (offset 0x3C in upm ram) */
 123         0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff
 124 };
 125
 126 /*
 127  * Check board identity.  Always successful (gives information only)
 128  */
 129 int checkboard (void)
 130 {
 131         char *s;
 132         char buf[64];
 133         int i;
 134
 135         i = getenv_r ("board_id", buf, sizeof (buf));
 136         s = (i > 0) ? buf : NULL;
 137
 138         if (s) {
 139                 printf ("%s ", s);
 140         } else {
 141                 printf ("<unknown> ");
 142         }
 143
 144         i = getenv_r ("serial#", buf, sizeof (buf));
 145         s = (i > 0) ? buf : NULL;
 146
 147         if (s) {
 148                 printf ("S/N %s\n", s);
 149         } else {
 150                 printf ("S/N <unknown>\n");
 151         }
 152
 153         printf ("CPU at %s MHz, ", strmhz (buf, gd->cpu_clk));
 154         printf ("local bus at %s MHz\n", strmhz (buf, gd->bus_clk));
 155         return (0);
 156 }
 157
 158 /*
 159  * Initialize SDRAM
 160  */
 161 long int initdram (int board_type)
 162 {
 163         volatile immap_t *immr = (immap_t *) CFG_IMMR;
 164         volatile memctl8xx_t *memctl = &immr->im_memctl;
 165
 166         upmconfig (UPMA,
 167                    (uint *) sdram_upm_table,
 168                    sizeof (sdram_upm_table) / sizeof (uint)
 169                 );
 170
 171         /*
 172          * Setup MAMR register
 173          */
 174         memctl->memc_mptpr = CFG_MPTPR_1BK_8K;
 175         memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE));     /* no refresh yet */
 176
 177         /*
 178          * Map CS1* to SDRAM bank
 179          */
 180         memctl->memc_or1 = CFG_OR1;
 181         memctl->memc_br1 = CFG_BR1;
 182
 183         /*
 184          * Perform SDRAM initialization sequence:
 185          * 1. Apply at least one NOP command
 186          * 2. 100 uS delay (JEDEC standard says 200 uS)
 187          * 3. Issue 4 precharge commands
 188          * 4. Perform two refresh cycles
 189          * 5. Program mode register
 190          *
 191          * Program SDRAM for standard operation, sequential burst, burst length
 192          * of 4, CAS latency of 2.
 193          */
 194         memctl->memc_mar = 0x00000000;
 195         memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
 196                 MCR_MLCF (0) | UPMA_NOP_ADDR;
 197         udelay (200);
 198         memctl->memc_mar = 0x00000000;
 199         memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
 200                 MCR_MLCF (4) | UPMA_PRECHARGE_ADDR;
 201
 202         memctl->memc_mar = 0x00000000;
 203         memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
 204                 MCR_MLCF (2) | UPM_REFRESH_ADDR;
 205
 206         memctl->memc_mar = 0x00000088;
 207         memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
 208                 MCR_MLCF (1) | UPMA_MRS_ADDR;
 209
 210         memctl->memc_mar = 0x00000000;
 211         memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
 212                 MCR_MLCF (0) | UPMA_NOP_ADDR;
 213         /*
 214          * Enable refresh
 215          */
 216         memctl->memc_mamr |= MAMR_PTAE;
 217
 218         return (SDRAM_SIZE);
 219 }
 220
 221 /*
 222  * Disk On Chip (DOC) Millenium initialization.
 223  * The DOC lives in the CS2* space
 224  */
 225 #if defined(CONFIG_CMD_DOC)
 226 extern void doc_probe (ulong physadr);
 227
 228 void doc_init (void)
 229 {
 230         printf ("Probing at 0x%.8x: ", DOC_BASE);
 231         doc_probe (DOC_BASE);
 232 }
 233 #endif
 234
 235 /*
 236  * Miscellaneous intialization
 237  */
 238 int misc_init_r (void)
 239 {
 240         volatile immap_t *immr = (immap_t *) CFG_IMMR;
 241         volatile memctl8xx_t *memctl = &immr->im_memctl;
 242
 243         /*
 244          * Set up UPMB to handle the Virtex FPGA SelectMap interface
 245          */
 246         upmconfig (UPMB, (uint *) selectmap_upm_table,
 247                    sizeof (selectmap_upm_table) / sizeof (uint));
 248
 249         memctl->memc_mbmr = 0x0;
 250
 251         config_mpc8xx_ioports (immr);
 252
 253 #if defined(CONFIG_CMD_MII)
 254         mii_init ();
 255 #endif
 256
 257 #if (CONFIG_FPGA)
 258         gen860t_init_fpga ();
 259 #endif
 260         return 0;
 261 }
 262
 263 /*
 264  * Final init hook before entering command loop.
 265  */
 266 int last_stage_init (void)
 267 {
 268 #if !defined(CONFIG_SC)
 269         char buf[256];
 270         int i;
 271
 272         /*
 273          * Turn the beeper volume all the way down in case this is a warm boot.
 274          */
 275         set_beeper_volume (-64);
 276         init_beeper ();
 277
 278         /*
 279          * Read the environment to see what to do with the beeper
 280          */
 281         i = getenv_r ("beeper", buf, sizeof (buf));
 282         if (i > 0) {
 283                 do_beeper (buf);
 284         }
 285 #endif
 286         return 0;
 287 }
 288
 289 /*
 290  * Stub to make POST code happy.  Can't self-poweroff, so just hang.
 291  */
 292 void board_poweroff (void)
 293 {
 294         puts ("### Please power off the board ###\n");
 295         while (1);
 296 }
 297
 298 #ifdef CONFIG_POST
 299 /*
 300  * Returns 1 if keys pressed to start the power-on long-running tests
 301  * Called from board_init_f().
 302  */
 303 int post_hotkeys_pressed (void)
 304 {
 305         return 0;               /* No hotkeys supported */
 306 }
 307 #endif