board/eltec/bab7xx/bab7xx.c

   1 /*
   2  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   3  * Andreas Heppel <aheppel@sysgo.de>
   4  * (C) Copyright 2001 ELTEC Elektronik AG
   5  * Frank Gottschling <fgottschling@eltec.de>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <mpc106.h>
  29 #include <mk48t59.h>
  30 #include <74xx_7xx.h>
  31 #include <ns87308.h>
  32 #include <video_fb.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 /*---------------------------------------------------------------------------*/
  37 /*
  38  * Get Bus clock frequency
  39  */
  40 ulong bab7xx_get_bus_freq (void)
  41 {
  42         /*
  43          * The GPIO Port 1 on BAB7xx reflects the bus speed.
  44          */
  45         volatile struct GPIO *gpio =
  46                 (struct GPIO *) (CFG_ISA_IO + CFG_NS87308_GPIO_BASE);
  47
  48         unsigned char data = gpio->dta1;
  49
  50         if (data & 0x02)
  51                 return 66666666;
  52
  53         return 83333333;
  54 }
  55
  56 /*---------------------------------------------------------------------------*/
  57
  58 /*
  59  * Measure CPU clock speed (core clock GCLK1) (Approx. GCLK frequency in Hz)
  60  */
  61 ulong bab7xx_get_gclk_freq (void)
  62 {
  63         static const int pllratio_to_factor[] = {
  64                 00, 75, 70, 00, 20, 65, 100, 45, 30, 55, 40, 50, 80, 60, 35,
  65                         00,
  66         };
  67
  68         return pllratio_to_factor[get_hid1 () >> 28] *
  69                 (bab7xx_get_bus_freq () / 10);
  70 }
  71
  72 /*----------------------------------------------------------------------------*/
  73
  74 int checkcpu (void)
  75 {
  76         uint pvr = get_pvr ();
  77
  78         printf ("MPC7xx V%d.%d", (pvr >> 8) & 0xFF, pvr & 0xFF);
  79         printf (" at %ld / %ld MHz\n", bab7xx_get_gclk_freq () / 1000000,
  80                 bab7xx_get_bus_freq () / 1000000);
  81
  82         return (0);
  83 }
  84
  85 /* ------------------------------------------------------------------------- */
  86
  87 int checkboard (void)
  88 {
  89 #ifdef CFG_ADDRESS_MAP_A
  90         puts ("Board: ELTEC BAB7xx PReP\n");
  91 #else
  92         puts ("Board: ELTEC BAB7xx CHRP\n");
  93 #endif
  94         return (0);
  95 }
  96
  97 /* ------------------------------------------------------------------------- */
  98
  99 int checkflash (void)
 100 {
 101         /* TODO: XXX XXX XXX */
 102         printf ("2 MB ## Test not implemented yet ##\n");
 103         return (0);
 104 }
 105
 106 /* ------------------------------------------------------------------------- */
 107
 108
 109 static unsigned int mpc106_read_cfg_dword (unsigned int reg)
 110 {
 111         unsigned int reg_addr = MPC106_REG | (reg & 0xFFFFFFFC);
 112
 113         out32r (MPC106_REG_ADDR, reg_addr);
 114
 115         return (in32r (MPC106_REG_DATA | (reg & 0x3)));
 116 }
 117
 118 /* ------------------------------------------------------------------------- */
 119
 120 long int dram_size (int board_type)
 121 {
 122         /* No actual initialisation to do - done when setting up
 123          * PICRs MCCRs ME/SARs etc in ram_init.S.
 124          */
 125
 126         register unsigned long i, msar1, mear1, memSize;
 127
 128 #if defined(CFG_MEMTEST)
 129         register unsigned long reg;
 130
 131         printf ("Testing DRAM\n");
 132
 133         /* write each mem addr with it's address */
 134         for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg += 4)
 135                 *reg = reg;
 136
 137         for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg += 4) {
 138                 if (*reg != reg)
 139                         return -1;
 140         }
 141 #endif
 142
 143         /*
 144          * Since MPC106 memory controller chip has already been set to
 145          * control all memory, just read and interpret its memory boundery register.
 146          */
 147         memSize = 0;
 148         msar1 = mpc106_read_cfg_dword (MPC106_MSAR1);
 149         mear1 = mpc106_read_cfg_dword (MPC106_MEAR1);
 150         i = mpc106_read_cfg_dword (MPC106_MBER) & 0xf;
 151
 152         do {
 153                 if (i & 0x01)   /* is bank enabled ? */
 154                         memSize += (mear1 & 0xff) - (msar1 & 0xff) + 1;
 155                 msar1 >>= 8;
 156                 mear1 >>= 8;
 157                 i >>= 1;
 158         } while (i);
 159
 160         return (memSize * 0x100000);
 161 }
 162
 163 /* ------------------------------------------------------------------------- */
 164
 165 long int initdram (int board_type)
 166 {
 167         return dram_size (board_type);
 168 }
 169
 170 /* ------------------------------------------------------------------------- */
 171
 172 void after_reloc (ulong dest_addr)
 173 {
 174         /*
 175          * Jump to the main U-Boot board init code
 176          */
 177         board_init_r ((gd_t *) gd, dest_addr);
 178 }
 179
 180 /* ------------------------------------------------------------------------- */
 181
 182 /*
 183  * do_reset is done here because in this case it is board specific, since the
 184  * 7xx CPUs can only be reset by external HW (the RTC in this case).
 185  */
 186 void do_reset (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
 187 {
 188 #if defined(CONFIG_RTC_MK48T59)
 189         /* trigger watchdog immediately */
 190         rtc_set_watchdog (1, RTC_WD_RB_16TH);
 191 #else
 192 #error "You must define the macro CONFIG_RTC_MK48T59."
 193 #endif
 194 }
 195
 196 /* ------------------------------------------------------------------------- */
 197
 198 #if defined(CONFIG_WATCHDOG)
 199 /*
 200  * Since the 7xx CPUs don't have an internal watchdog, this function is
 201  * board specific.  We use the RTC here.
 202  */
 203 void watchdog_reset (void)
 204 {
 205 #if defined(CONFIG_RTC_MK48T59)
 206         /* we use a 32 sec watchdog timer */
 207         rtc_set_watchdog (8, RTC_WD_RB_4);
 208 #else
 209 #error "You must define the macro CONFIG_RTC_MK48T59."
 210 #endif
 211 }
 212 #endif /* CONFIG_WATCHDOG */
 213
 214 /* ------------------------------------------------------------------------- */
 215
 216 #ifdef CONFIG_CONSOLE_EXTRA_INFO
 217 extern GraphicDevice smi;
 218
 219 void video_get_info_str (int line_number, char *info)
 220 {
 221         /* init video info strings for graphic console */
 222         switch (line_number) {
 223         case 1:
 224                 sprintf (info, " MPC7xx V%d.%d at %ld / %ld MHz",
 225                          (get_pvr () >> 8) & 0xFF,
 226                          get_pvr () & 0xFF,
 227                          bab7xx_get_gclk_freq () / 1000000,
 228                          bab7xx_get_bus_freq () / 1000000);
 229                 return;
 230         case 2:
 231                 sprintf (info,
 232                          " ELTEC BAB7xx with %ld MB DRAM and %ld MB FLASH",
 233                          dram_size (0) / 0x100000, flash_init () / 0x100000);
 234                 return;
 235         case 3:
 236                 sprintf (info, " %s", smi.modeIdent);
 237                 return;
 238         }
 239
 240         /* no more info lines */
 241         *info = 0;
 242         return;
 243 }
 244 #endif
 245
 246 /*---------------------------------------------------------------------------*/